./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:53:48,710 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:53:48,785 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:53:48,789 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:53:48,789 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:53:48,833 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:53:48,840 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:53:48,840 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:53:48,841 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:53:48,843 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:53:48,844 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:53:48,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:53:48,845 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:53:48,846 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:53:48,846 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:53:48,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:53:48,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:53:48,846 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:53:48,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:53:48,847 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:53:48,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:53:48,847 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:53:48,847 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:53:48,848 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:53:48,848 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:53:48,848 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:53:48,848 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:53:48,848 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:53:48,849 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:53:48,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:53:48,850 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:53:48,850 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:53:48,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:53:48,850 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:53:48,851 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:53:48,851 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:53:48,851 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:53:48,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:53:48,851 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:53:48,851 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:53:48,852 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:53:48,852 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:53:48,852 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:53:48,852 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:53:49,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:53:49,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:53:49,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:53:49,052 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:53:49,052 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:53:49,053 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 21:53:50,067 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:53:50,264 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:53:50,264 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 21:53:50,279 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/170ead191/3507a03f1a364302835b060b7b0d1247/FLAG64e7acd04 [2024-06-27 21:53:50,291 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/170ead191/3507a03f1a364302835b060b7b0d1247 [2024-06-27 21:53:50,292 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:53:50,293 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:53:50,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 21:53:50,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:53:50,345 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:53:50,346 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:53:50,346 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:53:50,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:53:50,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:53:50" (1/2) ... [2024-06-27 21:53:50,351 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7053d904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:53:50, skipping insertion in model container [2024-06-27 21:53:50,351 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:53:50" (1/2) ... [2024-06-27 21:53:50,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1791dc0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:53:50, skipping insertion in model container [2024-06-27 21:53:50,352 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:53:50" (2/2) ... [2024-06-27 21:53:50,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7053d904 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50, skipping insertion in model container [2024-06-27 21:53:50,352 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:53:50" (2/2) ... [2024-06-27 21:53:50,353 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:53:50,369 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:53:50,369 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ! multithreaded || (((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-27 21:53:50,370 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] ! multithreaded || (((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-27 21:53:50,370 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ! multithreaded || (((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-27 21:53:50,370 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:53:50,370 INFO L106 edCorrectnessWitness]: ghost_update [L778-L778] multithreaded = 1; [2024-06-27 21:53:50,409 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:53:50,555 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-27 21:53:50,680 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:53:50,690 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 21:53:50,715 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:53:50,751 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:53:50,830 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:53:50,837 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50 WrapperNode [2024-06-27 21:53:50,838 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:53:50,839 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:53:50,839 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:53:50,839 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:53:50,844 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 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,857 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 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,873 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-27 21:53:50,873 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:53:50,874 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:53:50,874 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:53:50,874 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:53:50,881 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,883 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,892 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 21:53:50,892 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,896 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,897 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,899 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:53:50,906 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:53:50,906 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:53:50,906 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:53:50,907 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50" (1/1) ... [2024-06-27 21:53:50,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:53:50,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:53:50,931 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:53:50,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:53:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:53:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:53:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:53:50,962 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:53:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:53:50,962 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:53:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:53:50,962 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:53:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:53:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:53:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:53:50,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:53:50,965 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:53:51,085 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:53:51,087 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:53:51,260 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:53:51,260 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:53:51,343 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:53:51,343 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:53:51,344 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:53:51 BoogieIcfgContainer [2024-06-27 21:53:51,344 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:53:51,345 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:53:51,345 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:53:51,347 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:53:51,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:53:50" (1/4) ... [2024-06-27 21:53:51,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c208a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:53:51, skipping insertion in model container [2024-06-27 21:53:51,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:53:50" (2/4) ... [2024-06-27 21:53:51,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c208a47 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:53:51, skipping insertion in model container [2024-06-27 21:53:51,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:53:50" (3/4) ... [2024-06-27 21:53:51,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c208a47 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:53:51, skipping insertion in model container [2024-06-27 21:53:51,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:53:51" (4/4) ... [2024-06-27 21:53:51,349 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 21:53:51,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:53:51,362 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:53:51,362 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:53:51,393 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:53:51,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 21:53:51,437 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-27 21:53:51,437 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:53:51,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-27 21:53:51,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 21:53:51,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-27 21:53:51,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:53:51,453 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;@50b23f41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:53:51,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 21:53:51,456 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:53:51,456 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:53:51,456 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:53:51,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:51,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:53:51,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:51,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash 206126996, now seen corresponding path program 1 times [2024-06-27 21:53:51,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:51,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398119415] [2024-06-27 21:53:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:51,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:51,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:51,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398119415] [2024-06-27 21:53:51,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398119415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:51,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:51,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:53:51,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839903238] [2024-06-27 21:53:51,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:51,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:53:51,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:51,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:53:51,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:53:51,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 21:53:51,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:51,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:51,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 21:53:51,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:51,917 INFO L124 PetriNetUnfolderBase]: 575/1029 cut-off events. [2024-06-27 21:53:51,917 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 21:53:51,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1969 conditions, 1029 events. 575/1029 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5614 event pairs, 391 based on Foata normal form. 1/983 useless extension candidates. Maximal degree in co-relation 1957. Up to 883 conditions per place. [2024-06-27 21:53:51,927 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 30 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-27 21:53:51,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 185 flow [2024-06-27 21:53:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:53:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:53:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-27 21:53:51,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2024-06-27 21:53:51,938 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 100 transitions. [2024-06-27 21:53:51,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 185 flow [2024-06-27 21:53:51,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:53:51,942 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-27 21:53:51,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-27 21:53:51,960 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-27 21:53:51,960 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-27 21:53:51,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:51,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:51,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:51,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:53:51,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:51,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash 519593139, now seen corresponding path program 1 times [2024-06-27 21:53:51,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:51,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650120511] [2024-06-27 21:53:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:51,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:52,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:52,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650120511] [2024-06-27 21:53:52,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650120511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:52,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:52,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:53:52,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371507369] [2024-06-27 21:53:52,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:52,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:53:52,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:52,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:53:52,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:53:52,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:53:52,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:52,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:52,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:53:52,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:52,328 INFO L124 PetriNetUnfolderBase]: 750/1405 cut-off events. [2024-06-27 21:53:52,328 INFO L125 PetriNetUnfolderBase]: For 271/301 co-relation queries the response was YES. [2024-06-27 21:53:52,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2968 conditions, 1405 events. 750/1405 cut-off events. For 271/301 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8172 event pairs, 443 based on Foata normal form. 3/1375 useless extension candidates. Maximal degree in co-relation 2956. Up to 1115 conditions per place. [2024-06-27 21:53:52,338 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 43 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-06-27 21:53:52,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 278 flow [2024-06-27 21:53:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:53:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:53:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-27 21:53:52,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-06-27 21:53:52,345 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 130 transitions. [2024-06-27 21:53:52,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 278 flow [2024-06-27 21:53:52,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 66 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:53:52,349 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 166 flow [2024-06-27 21:53:52,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-27 21:53:52,351 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-06-27 21:53:52,351 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 166 flow [2024-06-27 21:53:52,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:52,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:52,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:52,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:53:52,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:52,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:52,354 INFO L85 PathProgramCache]: Analyzing trace with hash -990439750, now seen corresponding path program 1 times [2024-06-27 21:53:52,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:52,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109282984] [2024-06-27 21:53:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:52,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:52,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:52,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109282984] [2024-06-27 21:53:52,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109282984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:52,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:52,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:53:52,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125327859] [2024-06-27 21:53:52,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:52,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:53:52,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:52,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:53:52,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:53:52,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:53:52,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:52,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:52,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:53:52,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:52,774 INFO L124 PetriNetUnfolderBase]: 1416/2257 cut-off events. [2024-06-27 21:53:52,775 INFO L125 PetriNetUnfolderBase]: For 991/991 co-relation queries the response was YES. [2024-06-27 21:53:52,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5572 conditions, 2257 events. 1416/2257 cut-off events. For 991/991 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12381 event pairs, 661 based on Foata normal form. 2/2255 useless extension candidates. Maximal degree in co-relation 5556. Up to 2076 conditions per place. [2024-06-27 21:53:52,788 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 52 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2024-06-27 21:53:52,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 71 transitions, 349 flow [2024-06-27 21:53:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:53:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:53:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-27 21:53:52,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 21:53:52,790 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 166 flow. Second operand 4 states and 116 transitions. [2024-06-27 21:53:52,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 71 transitions, 349 flow [2024-06-27 21:53:52,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 347 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 21:53:52,793 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 225 flow [2024-06-27 21:53:52,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-27 21:53:52,794 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2024-06-27 21:53:52,794 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 225 flow [2024-06-27 21:53:52,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:52,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:52,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:52,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:53:52,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:52,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:52,795 INFO L85 PathProgramCache]: Analyzing trace with hash -46351, now seen corresponding path program 1 times [2024-06-27 21:53:52,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:52,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219942010] [2024-06-27 21:53:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:52,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:53,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:53,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219942010] [2024-06-27 21:53:53,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219942010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:53,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:53,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:53:53,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699338137] [2024-06-27 21:53:53,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:53,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:53:53,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:53:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:53:53,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 21:53:53,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 225 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:53,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:53,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 21:53:53,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:53,233 INFO L124 PetriNetUnfolderBase]: 1101/1809 cut-off events. [2024-06-27 21:53:53,234 INFO L125 PetriNetUnfolderBase]: For 1477/1489 co-relation queries the response was YES. [2024-06-27 21:53:53,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4888 conditions, 1809 events. 1101/1809 cut-off events. For 1477/1489 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10020 event pairs, 251 based on Foata normal form. 18/1813 useless extension candidates. Maximal degree in co-relation 4869. Up to 1557 conditions per place. [2024-06-27 21:53:53,244 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 61 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2024-06-27 21:53:53,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 92 transitions, 473 flow [2024-06-27 21:53:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:53:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:53:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 21:53:53,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 21:53:53,248 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 225 flow. Second operand 6 states and 185 transitions. [2024-06-27 21:53:53,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 92 transitions, 473 flow [2024-06-27 21:53:53,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 471 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 21:53:53,253 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 285 flow [2024-06-27 21:53:53,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-27 21:53:53,254 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2024-06-27 21:53:53,255 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 285 flow [2024-06-27 21:53:53,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:53,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:53,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:53,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:53:53,255 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:53,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:53,256 INFO L85 PathProgramCache]: Analyzing trace with hash 971375189, now seen corresponding path program 1 times [2024-06-27 21:53:53,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:53,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091312371] [2024-06-27 21:53:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:53,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:53,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:53,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091312371] [2024-06-27 21:53:53,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091312371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:53,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:53,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:53:53,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65317666] [2024-06-27 21:53:53,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:53,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:53:53,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:53,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:53:53,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:53:53,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:53:53,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 285 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) [2024-06-27 21:53:53,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:53,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:53:53,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:53,684 INFO L124 PetriNetUnfolderBase]: 1422/2286 cut-off events. [2024-06-27 21:53:53,685 INFO L125 PetriNetUnfolderBase]: For 2702/2702 co-relation queries the response was YES. [2024-06-27 21:53:53,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6748 conditions, 2286 events. 1422/2286 cut-off events. For 2702/2702 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12556 event pairs, 427 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 6724. Up to 2029 conditions per place. [2024-06-27 21:53:53,697 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 69 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-27 21:53:53,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 95 transitions, 572 flow [2024-06-27 21:53:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:53:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:53:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 21:53:53,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2024-06-27 21:53:53,699 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 285 flow. Second operand 5 states and 148 transitions. [2024-06-27 21:53:53,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 95 transitions, 572 flow [2024-06-27 21:53:53,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 95 transitions, 541 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:53:53,707 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 344 flow [2024-06-27 21:53:53,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-27 21:53:53,709 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2024-06-27 21:53:53,712 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 344 flow [2024-06-27 21:53:53,713 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) [2024-06-27 21:53:53,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:53,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:53,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:53:53,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:53,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2051922885, now seen corresponding path program 2 times [2024-06-27 21:53:53,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:53,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026790217] [2024-06-27 21:53:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:53,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:53,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:53,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026790217] [2024-06-27 21:53:53,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026790217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:53,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:53,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:53:53,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328734808] [2024-06-27 21:53:53,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:53,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:53:53,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:53,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:53:53,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:53:53,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:53:53,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 344 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) [2024-06-27 21:53:53,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:53,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:53:53,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:54,176 INFO L124 PetriNetUnfolderBase]: 1417/2456 cut-off events. [2024-06-27 21:53:54,177 INFO L125 PetriNetUnfolderBase]: For 3844/3844 co-relation queries the response was YES. [2024-06-27 21:53:54,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7364 conditions, 2456 events. 1417/2456 cut-off events. For 3844/3844 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14411 event pairs, 697 based on Foata normal form. 2/2447 useless extension candidates. Maximal degree in co-relation 7338. Up to 2024 conditions per place. [2024-06-27 21:53:54,191 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 64 selfloop transitions, 15 changer transitions 0/91 dead transitions. [2024-06-27 21:53:54,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 91 transitions, 565 flow [2024-06-27 21:53:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:53:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:53:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-27 21:53:54,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-06-27 21:53:54,192 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 344 flow. Second operand 5 states and 143 transitions. [2024-06-27 21:53:54,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 91 transitions, 565 flow [2024-06-27 21:53:54,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 539 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 21:53:54,199 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 363 flow [2024-06-27 21:53:54,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-06-27 21:53:54,202 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 21 predicate places. [2024-06-27 21:53:54,202 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 363 flow [2024-06-27 21:53:54,202 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) [2024-06-27 21:53:54,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:54,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:54,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:53:54,203 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:54,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:54,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1670172409, now seen corresponding path program 1 times [2024-06-27 21:53:54,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:54,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19304346] [2024-06-27 21:53:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:54,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:54,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:54,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19304346] [2024-06-27 21:53:54,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19304346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:54,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:54,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:53:54,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693616072] [2024-06-27 21:53:54,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:54,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:53:54,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:54,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:53:54,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:53:54,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:53:54,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:54,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:54,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:53:54,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:54,549 INFO L124 PetriNetUnfolderBase]: 1171/1969 cut-off events. [2024-06-27 21:53:54,549 INFO L125 PetriNetUnfolderBase]: For 3732/3732 co-relation queries the response was YES. [2024-06-27 21:53:54,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6205 conditions, 1969 events. 1171/1969 cut-off events. For 3732/3732 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11069 event pairs, 515 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 6179. Up to 1701 conditions per place. [2024-06-27 21:53:54,559 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 68 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-06-27 21:53:54,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 579 flow [2024-06-27 21:53:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:53:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:53:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 21:53:54,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-06-27 21:53:54,561 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 363 flow. Second operand 5 states and 146 transitions. [2024-06-27 21:53:54,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 579 flow [2024-06-27 21:53:54,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 557 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 21:53:54,565 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 380 flow [2024-06-27 21:53:54,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-27 21:53:54,566 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 24 predicate places. [2024-06-27 21:53:54,566 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 380 flow [2024-06-27 21:53:54,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:54,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:54,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:54,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:53:54,567 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:54,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:54,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1478917300, now seen corresponding path program 1 times [2024-06-27 21:53:54,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:54,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899000719] [2024-06-27 21:53:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:54,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:54,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:54,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899000719] [2024-06-27 21:53:54,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899000719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:54,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:54,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:53:54,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308074535] [2024-06-27 21:53:54,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:54,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:53:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:53:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:53:54,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:53:54,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 380 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) [2024-06-27 21:53:54,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:54,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:53:54,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:55,086 INFO L124 PetriNetUnfolderBase]: 1443/2516 cut-off events. [2024-06-27 21:53:55,087 INFO L125 PetriNetUnfolderBase]: For 5384/5384 co-relation queries the response was YES. [2024-06-27 21:53:55,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7799 conditions, 2516 events. 1443/2516 cut-off events. For 5384/5384 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14906 event pairs, 594 based on Foata normal form. 3/2510 useless extension candidates. Maximal degree in co-relation 7770. Up to 2024 conditions per place. [2024-06-27 21:53:55,107 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 80 selfloop transitions, 19 changer transitions 0/111 dead transitions. [2024-06-27 21:53:55,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 694 flow [2024-06-27 21:53:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:53:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:53:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 21:53:55,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:53:55,110 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 380 flow. Second operand 6 states and 177 transitions. [2024-06-27 21:53:55,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 694 flow [2024-06-27 21:53:55,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 673 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:53:55,119 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 441 flow [2024-06-27 21:53:55,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=441, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-06-27 21:53:55,121 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2024-06-27 21:53:55,121 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 441 flow [2024-06-27 21:53:55,121 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) [2024-06-27 21:53:55,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:55,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:55,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:53:55,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:55,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash 893039992, now seen corresponding path program 2 times [2024-06-27 21:53:55,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:55,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712711169] [2024-06-27 21:53:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:55,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:55,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:55,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712711169] [2024-06-27 21:53:55,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712711169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:55,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:55,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:53:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780310152] [2024-06-27 21:53:55,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:55,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:53:55,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:53:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:53:55,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 21:53:55,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 441 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:55,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:55,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 21:53:55,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:55,548 INFO L124 PetriNetUnfolderBase]: 1376/2367 cut-off events. [2024-06-27 21:53:55,549 INFO L125 PetriNetUnfolderBase]: For 6464/6491 co-relation queries the response was YES. [2024-06-27 21:53:55,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8120 conditions, 2367 events. 1376/2367 cut-off events. For 6464/6491 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13750 event pairs, 485 based on Foata normal form. 18/2340 useless extension candidates. Maximal degree in co-relation 8090. Up to 1887 conditions per place. [2024-06-27 21:53:55,561 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 78 selfloop transitions, 27 changer transitions 0/119 dead transitions. [2024-06-27 21:53:55,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 119 transitions, 858 flow [2024-06-27 21:53:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:53:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:53:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 21:53:55,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:53:55,563 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 441 flow. Second operand 6 states and 177 transitions. [2024-06-27 21:53:55,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 119 transitions, 858 flow [2024-06-27 21:53:55,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 119 transitions, 801 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:53:55,569 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 581 flow [2024-06-27 21:53:55,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=581, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-27 21:53:55,570 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2024-06-27 21:53:55,570 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 581 flow [2024-06-27 21:53:55,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:55,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:55,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:55,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:53:55,571 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:55,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:55,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1483685844, now seen corresponding path program 1 times [2024-06-27 21:53:55,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:55,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977676582] [2024-06-27 21:53:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:55,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:55,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:55,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977676582] [2024-06-27 21:53:55,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977676582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:55,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:55,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:53:55,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62665606] [2024-06-27 21:53:55,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:55,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:53:55,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:53:55,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:53:55,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:53:55,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 581 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:55,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:55,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:53:55,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:55,916 INFO L124 PetriNetUnfolderBase]: 1406/2275 cut-off events. [2024-06-27 21:53:55,916 INFO L125 PetriNetUnfolderBase]: For 8338/8399 co-relation queries the response was YES. [2024-06-27 21:53:55,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8704 conditions, 2275 events. 1406/2275 cut-off events. For 8338/8399 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12579 event pairs, 402 based on Foata normal form. 26/2232 useless extension candidates. Maximal degree in co-relation 8672. Up to 1962 conditions per place. [2024-06-27 21:53:55,931 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 88 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2024-06-27 21:53:55,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 881 flow [2024-06-27 21:53:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:53:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:53:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 21:53:55,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-27 21:53:55,933 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 581 flow. Second operand 6 states and 178 transitions. [2024-06-27 21:53:55,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 881 flow [2024-06-27 21:53:55,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 120 transitions, 859 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 21:53:55,943 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 620 flow [2024-06-27 21:53:55,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2024-06-27 21:53:55,944 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2024-06-27 21:53:55,944 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 620 flow [2024-06-27 21:53:55,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:55,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:55,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:55,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:53:55,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:55,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:55,946 INFO L85 PathProgramCache]: Analyzing trace with hash -507878118, now seen corresponding path program 3 times [2024-06-27 21:53:55,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:55,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30601964] [2024-06-27 21:53:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:55,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:56,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:56,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30601964] [2024-06-27 21:53:56,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30601964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:56,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:56,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:53:56,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052587627] [2024-06-27 21:53:56,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:56,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:53:56,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:56,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:53:56,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:53:56,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 21:53:56,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 620 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:56,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:56,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 21:53:56,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:56,361 INFO L124 PetriNetUnfolderBase]: 1397/2369 cut-off events. [2024-06-27 21:53:56,362 INFO L125 PetriNetUnfolderBase]: For 9930/10048 co-relation queries the response was YES. [2024-06-27 21:53:56,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9111 conditions, 2369 events. 1397/2369 cut-off events. For 9930/10048 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13567 event pairs, 535 based on Foata normal form. 29/2340 useless extension candidates. Maximal degree in co-relation 9076. Up to 1916 conditions per place. [2024-06-27 21:53:56,378 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 75 selfloop transitions, 28 changer transitions 0/117 dead transitions. [2024-06-27 21:53:56,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 901 flow [2024-06-27 21:53:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:53:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:53:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 21:53:56,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-27 21:53:56,380 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 620 flow. Second operand 6 states and 172 transitions. [2024-06-27 21:53:56,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 901 flow [2024-06-27 21:53:56,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 117 transitions, 854 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:53:56,391 INFO L231 Difference]: Finished difference. Result has 87 places, 90 transitions, 648 flow [2024-06-27 21:53:56,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=648, PETRI_PLACES=87, PETRI_TRANSITIONS=90} [2024-06-27 21:53:56,392 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 38 predicate places. [2024-06-27 21:53:56,392 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 90 transitions, 648 flow [2024-06-27 21:53:56,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:56,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:56,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:56,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:53:56,392 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:56,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:56,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1364367120, now seen corresponding path program 2 times [2024-06-27 21:53:56,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:56,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519414856] [2024-06-27 21:53:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:56,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:56,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:56,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519414856] [2024-06-27 21:53:56,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519414856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:56,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:56,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:53:56,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440310816] [2024-06-27 21:53:56,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:56,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:53:56,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:56,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:53:56,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:53:56,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:53:56,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 90 transitions, 648 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:56,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:56,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:53:56,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:56,772 INFO L124 PetriNetUnfolderBase]: 1426/2515 cut-off events. [2024-06-27 21:53:56,773 INFO L125 PetriNetUnfolderBase]: For 11226/11236 co-relation queries the response was YES. [2024-06-27 21:53:56,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9520 conditions, 2515 events. 1426/2515 cut-off events. For 11226/11236 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15006 event pairs, 604 based on Foata normal form. 8/2506 useless extension candidates. Maximal degree in co-relation 9485. Up to 1999 conditions per place. [2024-06-27 21:53:56,789 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 88 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2024-06-27 21:53:56,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 120 transitions, 944 flow [2024-06-27 21:53:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:53:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:53:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 21:53:56,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 21:53:56,791 INFO L175 Difference]: Start difference. First operand has 87 places, 90 transitions, 648 flow. Second operand 6 states and 175 transitions. [2024-06-27 21:53:56,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 120 transitions, 944 flow [2024-06-27 21:53:56,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 120 transitions, 894 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:53:56,803 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 663 flow [2024-06-27 21:53:56,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=663, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-06-27 21:53:56,804 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 41 predicate places. [2024-06-27 21:53:56,804 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 663 flow [2024-06-27 21:53:56,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:56,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:56,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:56,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:53:56,805 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:56,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:56,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1355796240, now seen corresponding path program 3 times [2024-06-27 21:53:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:56,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913757673] [2024-06-27 21:53:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:56,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:56,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:56,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913757673] [2024-06-27 21:53:56,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913757673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:56,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:56,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:53:56,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922980339] [2024-06-27 21:53:56,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:56,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:53:56,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:53:56,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:53:56,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:53:56,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 663 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:56,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:56,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:53:56,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:57,245 INFO L124 PetriNetUnfolderBase]: 1420/2309 cut-off events. [2024-06-27 21:53:57,245 INFO L125 PetriNetUnfolderBase]: For 12310/12357 co-relation queries the response was YES. [2024-06-27 21:53:57,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9419 conditions, 2309 events. 1420/2309 cut-off events. For 12310/12357 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12859 event pairs, 368 based on Foata normal form. 29/2268 useless extension candidates. Maximal degree in co-relation 9382. Up to 1898 conditions per place. [2024-06-27 21:53:57,260 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 86 selfloop transitions, 22 changer transitions 0/123 dead transitions. [2024-06-27 21:53:57,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 971 flow [2024-06-27 21:53:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:53:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:53:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 21:53:57,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 21:53:57,262 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 663 flow. Second operand 6 states and 176 transitions. [2024-06-27 21:53:57,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 971 flow [2024-06-27 21:53:57,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 123 transitions, 926 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:53:57,274 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 697 flow [2024-06-27 21:53:57,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=697, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2024-06-27 21:53:57,274 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2024-06-27 21:53:57,274 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 697 flow [2024-06-27 21:53:57,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:57,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:57,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:57,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:53:57,275 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:57,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:57,276 INFO L85 PathProgramCache]: Analyzing trace with hash 86020189, now seen corresponding path program 1 times [2024-06-27 21:53:57,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:57,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826061034] [2024-06-27 21:53:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:57,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:57,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:57,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826061034] [2024-06-27 21:53:57,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826061034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:57,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:57,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:53:57,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118467717] [2024-06-27 21:53:57,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:57,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:53:57,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:57,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:53:57,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:53:57,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:53:57,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 697 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:57,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:57,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:53:57,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:57,703 INFO L124 PetriNetUnfolderBase]: 1547/2692 cut-off events. [2024-06-27 21:53:57,703 INFO L125 PetriNetUnfolderBase]: For 14432/14432 co-relation queries the response was YES. [2024-06-27 21:53:57,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10624 conditions, 2692 events. 1547/2692 cut-off events. For 14432/14432 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15947 event pairs, 663 based on Foata normal form. 2/2689 useless extension candidates. Maximal degree in co-relation 10585. Up to 2198 conditions per place. [2024-06-27 21:53:57,719 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 95 selfloop transitions, 17 changer transitions 0/124 dead transitions. [2024-06-27 21:53:57,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 124 transitions, 1063 flow [2024-06-27 21:53:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:53:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:53:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-27 21:53:57,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-06-27 21:53:57,721 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 697 flow. Second operand 5 states and 143 transitions. [2024-06-27 21:53:57,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 124 transitions, 1063 flow [2024-06-27 21:53:57,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 124 transitions, 1004 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 21:53:57,735 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 728 flow [2024-06-27 21:53:57,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=728, PETRI_PLACES=93, PETRI_TRANSITIONS=100} [2024-06-27 21:53:57,736 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 44 predicate places. [2024-06-27 21:53:57,736 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 728 flow [2024-06-27 21:53:57,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:57,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:57,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:57,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:53:57,737 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:57,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:57,737 INFO L85 PathProgramCache]: Analyzing trace with hash 549582409, now seen corresponding path program 2 times [2024-06-27 21:53:57,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:57,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073753784] [2024-06-27 21:53:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:57,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:57,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:57,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073753784] [2024-06-27 21:53:57,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073753784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:57,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:57,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:53:57,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480552214] [2024-06-27 21:53:57,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:57,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:53:57,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:53:57,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:53:57,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:53:57,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 100 transitions, 728 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:57,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:57,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:53:57,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:58,145 INFO L124 PetriNetUnfolderBase]: 1568/2551 cut-off events. [2024-06-27 21:53:58,146 INFO L125 PetriNetUnfolderBase]: For 15364/15364 co-relation queries the response was YES. [2024-06-27 21:53:58,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10836 conditions, 2551 events. 1568/2551 cut-off events. For 15364/15364 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14301 event pairs, 390 based on Foata normal form. 2/2548 useless extension candidates. Maximal degree in co-relation 10796. Up to 2256 conditions per place. [2024-06-27 21:53:58,161 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 96 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2024-06-27 21:53:58,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 124 transitions, 1063 flow [2024-06-27 21:53:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:53:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:53:58,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-06-27 21:53:58,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:53:58,163 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 728 flow. Second operand 4 states and 118 transitions. [2024-06-27 21:53:58,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 124 transitions, 1063 flow [2024-06-27 21:53:58,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 124 transitions, 1041 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 21:53:58,180 INFO L231 Difference]: Finished difference. Result has 96 places, 108 transitions, 838 flow [2024-06-27 21:53:58,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=838, PETRI_PLACES=96, PETRI_TRANSITIONS=108} [2024-06-27 21:53:58,181 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2024-06-27 21:53:58,181 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 108 transitions, 838 flow [2024-06-27 21:53:58,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:58,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:58,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:58,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:53:58,182 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:58,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1065786665, now seen corresponding path program 1 times [2024-06-27 21:53:58,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:58,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257313760] [2024-06-27 21:53:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:58,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:58,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:58,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257313760] [2024-06-27 21:53:58,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257313760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:58,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:58,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:53:58,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027204063] [2024-06-27 21:53:58,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:58,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:53:58,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:58,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:53:58,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:53:58,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:53:58,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 108 transitions, 838 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:58,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:58,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:53:58,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:58,685 INFO L124 PetriNetUnfolderBase]: 1872/3020 cut-off events. [2024-06-27 21:53:58,685 INFO L125 PetriNetUnfolderBase]: For 24215/24284 co-relation queries the response was YES. [2024-06-27 21:53:58,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13605 conditions, 3020 events. 1872/3020 cut-off events. For 24215/24284 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17442 event pairs, 333 based on Foata normal form. 47/2985 useless extension candidates. Maximal degree in co-relation 13564. Up to 2155 conditions per place. [2024-06-27 21:53:58,703 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 121 selfloop transitions, 34 changer transitions 0/171 dead transitions. [2024-06-27 21:53:58,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 171 transitions, 1446 flow [2024-06-27 21:53:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:53:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:53:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-06-27 21:53:58,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-06-27 21:53:58,705 INFO L175 Difference]: Start difference. First operand has 96 places, 108 transitions, 838 flow. Second operand 8 states and 245 transitions. [2024-06-27 21:53:58,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 171 transitions, 1446 flow [2024-06-27 21:53:58,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 171 transitions, 1409 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 21:53:58,729 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 1006 flow [2024-06-27 21:53:58,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1006, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-06-27 21:53:58,730 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 55 predicate places. [2024-06-27 21:53:58,730 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 1006 flow [2024-06-27 21:53:58,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:58,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:58,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:58,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:53:58,731 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:58,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:58,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1338798221, now seen corresponding path program 2 times [2024-06-27 21:53:58,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:58,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269812329] [2024-06-27 21:53:58,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:58,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:58,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:58,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269812329] [2024-06-27 21:53:58,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269812329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:58,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:58,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:53:58,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853881871] [2024-06-27 21:53:58,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:58,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:53:58,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:58,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:53:58,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:53:58,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:53:58,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 1006 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:58,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:58,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:53:58,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:59,260 INFO L124 PetriNetUnfolderBase]: 1824/2977 cut-off events. [2024-06-27 21:53:59,261 INFO L125 PetriNetUnfolderBase]: For 26999/27075 co-relation queries the response was YES. [2024-06-27 21:53:59,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13980 conditions, 2977 events. 1824/2977 cut-off events. For 26999/27075 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17407 event pairs, 493 based on Foata normal form. 49/2941 useless extension candidates. Maximal degree in co-relation 13936. Up to 2337 conditions per place. [2024-06-27 21:53:59,277 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 115 selfloop transitions, 30 changer transitions 0/161 dead transitions. [2024-06-27 21:53:59,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 161 transitions, 1437 flow [2024-06-27 21:53:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:53:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:53:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 21:53:59,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-06-27 21:53:59,278 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 1006 flow. Second operand 7 states and 213 transitions. [2024-06-27 21:53:59,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 161 transitions, 1437 flow [2024-06-27 21:53:59,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1355 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 21:53:59,315 INFO L231 Difference]: Finished difference. Result has 107 places, 118 transitions, 1019 flow [2024-06-27 21:53:59,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1019, PETRI_PLACES=107, PETRI_TRANSITIONS=118} [2024-06-27 21:53:59,315 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 58 predicate places. [2024-06-27 21:53:59,316 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 118 transitions, 1019 flow [2024-06-27 21:53:59,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:59,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:59,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:59,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:53:59,316 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:59,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash -781999401, now seen corresponding path program 3 times [2024-06-27 21:53:59,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:59,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957804290] [2024-06-27 21:53:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:59,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:59,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957804290] [2024-06-27 21:53:59,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957804290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:59,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:59,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:53:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724038981] [2024-06-27 21:53:59,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:59,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:53:59,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:53:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:53:59,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:53:59,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 118 transitions, 1019 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:59,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:59,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:53:59,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:53:59,757 INFO L124 PetriNetUnfolderBase]: 1943/3138 cut-off events. [2024-06-27 21:53:59,757 INFO L125 PetriNetUnfolderBase]: For 27481/27550 co-relation queries the response was YES. [2024-06-27 21:53:59,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14629 conditions, 3138 events. 1943/3138 cut-off events. For 27481/27550 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18334 event pairs, 486 based on Foata normal form. 37/3070 useless extension candidates. Maximal degree in co-relation 14584. Up to 2575 conditions per place. [2024-06-27 21:53:59,772 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 111 selfloop transitions, 32 changer transitions 0/159 dead transitions. [2024-06-27 21:53:59,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 159 transitions, 1437 flow [2024-06-27 21:53:59,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:53:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:53:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 21:53:59,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 21:53:59,774 INFO L175 Difference]: Start difference. First operand has 107 places, 118 transitions, 1019 flow. Second operand 7 states and 209 transitions. [2024-06-27 21:53:59,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 159 transitions, 1437 flow [2024-06-27 21:53:59,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 159 transitions, 1385 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 21:53:59,803 INFO L231 Difference]: Finished difference. Result has 109 places, 119 transitions, 1058 flow [2024-06-27 21:53:59,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1058, PETRI_PLACES=109, PETRI_TRANSITIONS=119} [2024-06-27 21:53:59,804 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 60 predicate places. [2024-06-27 21:53:59,804 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 119 transitions, 1058 flow [2024-06-27 21:53:59,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:59,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:59,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:59,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:53:59,805 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:53:59,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash -775328201, now seen corresponding path program 1 times [2024-06-27 21:53:59,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:59,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515913468] [2024-06-27 21:53:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:59,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:53:59,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:59,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515913468] [2024-06-27 21:53:59,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515913468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:59,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:53:59,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:53:59,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434161863] [2024-06-27 21:53:59,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:59,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:53:59,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:59,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:53:59,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:53:59,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:53:59,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 119 transitions, 1058 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:59,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:59,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:53:59,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:00,296 INFO L124 PetriNetUnfolderBase]: 2013/3310 cut-off events. [2024-06-27 21:54:00,296 INFO L125 PetriNetUnfolderBase]: For 30690/30741 co-relation queries the response was YES. [2024-06-27 21:54:00,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15443 conditions, 3310 events. 2013/3310 cut-off events. For 30690/30741 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19866 event pairs, 523 based on Foata normal form. 36/3271 useless extension candidates. Maximal degree in co-relation 15397. Up to 2428 conditions per place. [2024-06-27 21:54:00,316 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 112 selfloop transitions, 35 changer transitions 0/163 dead transitions. [2024-06-27 21:54:00,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 163 transitions, 1500 flow [2024-06-27 21:54:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 21:54:00,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 21:54:00,318 INFO L175 Difference]: Start difference. First operand has 109 places, 119 transitions, 1058 flow. Second operand 7 states and 211 transitions. [2024-06-27 21:54:00,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 163 transitions, 1500 flow [2024-06-27 21:54:00,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 163 transitions, 1429 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:00,357 INFO L231 Difference]: Finished difference. Result has 111 places, 120 transitions, 1085 flow [2024-06-27 21:54:00,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1085, PETRI_PLACES=111, PETRI_TRANSITIONS=120} [2024-06-27 21:54:00,358 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 62 predicate places. [2024-06-27 21:54:00,358 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 120 transitions, 1085 flow [2024-06-27 21:54:00,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:00,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:00,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:00,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:54:00,359 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:00,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:00,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1835208493, now seen corresponding path program 1 times [2024-06-27 21:54:00,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:00,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387398472] [2024-06-27 21:54:00,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:00,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:00,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387398472] [2024-06-27 21:54:00,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387398472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:00,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:00,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:00,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806967097] [2024-06-27 21:54:00,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:00,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:00,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:00,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 21:54:00,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 120 transitions, 1085 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:00,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:00,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 21:54:00,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:00,769 INFO L124 PetriNetUnfolderBase]: 1940/3216 cut-off events. [2024-06-27 21:54:00,769 INFO L125 PetriNetUnfolderBase]: For 30101/30145 co-relation queries the response was YES. [2024-06-27 21:54:00,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15119 conditions, 3216 events. 1940/3216 cut-off events. For 30101/30145 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19523 event pairs, 493 based on Foata normal form. 20/3119 useless extension candidates. Maximal degree in co-relation 15072. Up to 2706 conditions per place. [2024-06-27 21:54:00,789 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 105 selfloop transitions, 27 changer transitions 0/156 dead transitions. [2024-06-27 21:54:00,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 156 transitions, 1532 flow [2024-06-27 21:54:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 21:54:00,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 21:54:00,790 INFO L175 Difference]: Start difference. First operand has 111 places, 120 transitions, 1085 flow. Second operand 6 states and 179 transitions. [2024-06-27 21:54:00,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 156 transitions, 1532 flow [2024-06-27 21:54:00,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 156 transitions, 1461 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:00,825 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1179 flow [2024-06-27 21:54:00,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1179, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-27 21:54:00,826 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2024-06-27 21:54:00,826 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1179 flow [2024-06-27 21:54:00,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:00,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:00,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:00,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:54:00,827 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:00,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:00,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1198422737, now seen corresponding path program 4 times [2024-06-27 21:54:00,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:00,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000820394] [2024-06-27 21:54:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:00,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:00,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000820394] [2024-06-27 21:54:00,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000820394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:00,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:00,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:00,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111940272] [2024-06-27 21:54:00,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:00,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:00,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:00,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:00,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:00,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:00,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1179 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:00,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:00,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:00,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:01,290 INFO L124 PetriNetUnfolderBase]: 2127/3632 cut-off events. [2024-06-27 21:54:01,291 INFO L125 PetriNetUnfolderBase]: For 35168/35198 co-relation queries the response was YES. [2024-06-27 21:54:01,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16584 conditions, 3632 events. 2127/3632 cut-off events. For 35168/35198 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23082 event pairs, 683 based on Foata normal form. 37/3607 useless extension candidates. Maximal degree in co-relation 16535. Up to 2873 conditions per place. [2024-06-27 21:54:01,313 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 121 selfloop transitions, 32 changer transitions 0/169 dead transitions. [2024-06-27 21:54:01,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 169 transitions, 1615 flow [2024-06-27 21:54:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 21:54:01,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-27 21:54:01,314 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1179 flow. Second operand 7 states and 206 transitions. [2024-06-27 21:54:01,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 169 transitions, 1615 flow [2024-06-27 21:54:01,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 169 transitions, 1583 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 21:54:01,354 INFO L231 Difference]: Finished difference. Result has 120 places, 132 transitions, 1242 flow [2024-06-27 21:54:01,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1242, PETRI_PLACES=120, PETRI_TRANSITIONS=132} [2024-06-27 21:54:01,354 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 71 predicate places. [2024-06-27 21:54:01,355 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 132 transitions, 1242 flow [2024-06-27 21:54:01,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:01,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:01,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:01,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:54:01,355 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:01,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash 161187133, now seen corresponding path program 2 times [2024-06-27 21:54:01,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:01,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286760034] [2024-06-27 21:54:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:01,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:01,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286760034] [2024-06-27 21:54:01,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286760034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:01,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:01,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:01,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191367671] [2024-06-27 21:54:01,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:01,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:01,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:01,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:01,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 132 transitions, 1242 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:01,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:01,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:01,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:01,886 INFO L124 PetriNetUnfolderBase]: 2203/3695 cut-off events. [2024-06-27 21:54:01,886 INFO L125 PetriNetUnfolderBase]: For 40618/40720 co-relation queries the response was YES. [2024-06-27 21:54:01,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17498 conditions, 3695 events. 2203/3695 cut-off events. For 40618/40720 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 23085 event pairs, 730 based on Foata normal form. 31/3600 useless extension candidates. Maximal degree in co-relation 17447. Up to 2847 conditions per place. [2024-06-27 21:54:01,907 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 123 selfloop transitions, 34 changer transitions 0/173 dead transitions. [2024-06-27 21:54:01,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 173 transitions, 1704 flow [2024-06-27 21:54:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 21:54:01,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 21:54:01,909 INFO L175 Difference]: Start difference. First operand has 120 places, 132 transitions, 1242 flow. Second operand 7 states and 209 transitions. [2024-06-27 21:54:01,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 173 transitions, 1704 flow [2024-06-27 21:54:01,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 173 transitions, 1629 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:01,955 INFO L231 Difference]: Finished difference. Result has 122 places, 133 transitions, 1267 flow [2024-06-27 21:54:01,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1267, PETRI_PLACES=122, PETRI_TRANSITIONS=133} [2024-06-27 21:54:01,955 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2024-06-27 21:54:01,955 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 133 transitions, 1267 flow [2024-06-27 21:54:01,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:01,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:01,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:01,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:54:01,956 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:01,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:01,957 INFO L85 PathProgramCache]: Analyzing trace with hash 595848759, now seen corresponding path program 3 times [2024-06-27 21:54:01,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:01,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217566090] [2024-06-27 21:54:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:01,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:02,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:02,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217566090] [2024-06-27 21:54:02,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217566090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:02,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:02,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:02,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061036121] [2024-06-27 21:54:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:02,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:02,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:02,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:02,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:02,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:02,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 133 transitions, 1267 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:02,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:02,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:02,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:02,434 INFO L124 PetriNetUnfolderBase]: 2182/3602 cut-off events. [2024-06-27 21:54:02,435 INFO L125 PetriNetUnfolderBase]: For 37147/37177 co-relation queries the response was YES. [2024-06-27 21:54:02,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16963 conditions, 3602 events. 2182/3602 cut-off events. For 37147/37177 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 22081 event pairs, 458 based on Foata normal form. 33/3575 useless extension candidates. Maximal degree in co-relation 16911. Up to 2237 conditions per place. [2024-06-27 21:54:02,457 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 117 selfloop transitions, 40 changer transitions 0/173 dead transitions. [2024-06-27 21:54:02,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 173 transitions, 1667 flow [2024-06-27 21:54:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 21:54:02,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-27 21:54:02,459 INFO L175 Difference]: Start difference. First operand has 122 places, 133 transitions, 1267 flow. Second operand 7 states and 208 transitions. [2024-06-27 21:54:02,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 173 transitions, 1667 flow [2024-06-27 21:54:02,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 173 transitions, 1583 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:02,513 INFO L231 Difference]: Finished difference. Result has 123 places, 132 transitions, 1227 flow [2024-06-27 21:54:02,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1227, PETRI_PLACES=123, PETRI_TRANSITIONS=132} [2024-06-27 21:54:02,513 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 74 predicate places. [2024-06-27 21:54:02,513 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 132 transitions, 1227 flow [2024-06-27 21:54:02,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:02,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:02,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:02,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:54:02,514 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:02,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:02,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1480945453, now seen corresponding path program 2 times [2024-06-27 21:54:02,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:02,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706435027] [2024-06-27 21:54:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:02,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:02,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:02,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706435027] [2024-06-27 21:54:02,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706435027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:02,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:02,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:02,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370516763] [2024-06-27 21:54:02,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:02,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:02,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:02,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:02,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:02,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 21:54:02,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 132 transitions, 1227 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:02,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:02,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 21:54:02,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:02,944 INFO L124 PetriNetUnfolderBase]: 2065/3461 cut-off events. [2024-06-27 21:54:02,944 INFO L125 PetriNetUnfolderBase]: For 35430/35478 co-relation queries the response was YES. [2024-06-27 21:54:02,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16385 conditions, 3461 events. 2065/3461 cut-off events. For 35430/35478 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21548 event pairs, 515 based on Foata normal form. 23/3368 useless extension candidates. Maximal degree in co-relation 16332. Up to 2899 conditions per place. [2024-06-27 21:54:02,967 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 103 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-06-27 21:54:02,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 157 transitions, 1617 flow [2024-06-27 21:54:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:54:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:54:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 21:54:02,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-27 21:54:02,969 INFO L175 Difference]: Start difference. First operand has 123 places, 132 transitions, 1227 flow. Second operand 5 states and 153 transitions. [2024-06-27 21:54:02,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 157 transitions, 1617 flow [2024-06-27 21:54:03,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 157 transitions, 1519 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:03,025 INFO L231 Difference]: Finished difference. Result has 123 places, 135 transitions, 1227 flow [2024-06-27 21:54:03,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1227, PETRI_PLACES=123, PETRI_TRANSITIONS=135} [2024-06-27 21:54:03,025 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 74 predicate places. [2024-06-27 21:54:03,025 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 135 transitions, 1227 flow [2024-06-27 21:54:03,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:03,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:03,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:03,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:54:03,026 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:03,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:03,026 INFO L85 PathProgramCache]: Analyzing trace with hash 20126433, now seen corresponding path program 3 times [2024-06-27 21:54:03,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:03,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811560115] [2024-06-27 21:54:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:03,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:03,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:03,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811560115] [2024-06-27 21:54:03,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811560115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:03,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:03,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:03,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371341039] [2024-06-27 21:54:03,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:03,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:03,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:03,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:03,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:03,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 21:54:03,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 135 transitions, 1227 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:03,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:03,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 21:54:03,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:03,457 INFO L124 PetriNetUnfolderBase]: 2051/3422 cut-off events. [2024-06-27 21:54:03,458 INFO L125 PetriNetUnfolderBase]: For 33373/33435 co-relation queries the response was YES. [2024-06-27 21:54:03,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15742 conditions, 3422 events. 2051/3422 cut-off events. For 33373/33435 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21132 event pairs, 519 based on Foata normal form. 32/3347 useless extension candidates. Maximal degree in co-relation 15688. Up to 2918 conditions per place. [2024-06-27 21:54:03,475 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 105 selfloop transitions, 24 changer transitions 0/153 dead transitions. [2024-06-27 21:54:03,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 153 transitions, 1529 flow [2024-06-27 21:54:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:54:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:54:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 21:54:03,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7055555555555556 [2024-06-27 21:54:03,477 INFO L175 Difference]: Start difference. First operand has 123 places, 135 transitions, 1227 flow. Second operand 4 states and 127 transitions. [2024-06-27 21:54:03,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 153 transitions, 1529 flow [2024-06-27 21:54:03,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 153 transitions, 1473 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:03,522 INFO L231 Difference]: Finished difference. Result has 124 places, 135 transitions, 1240 flow [2024-06-27 21:54:03,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1240, PETRI_PLACES=124, PETRI_TRANSITIONS=135} [2024-06-27 21:54:03,522 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 75 predicate places. [2024-06-27 21:54:03,522 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 135 transitions, 1240 flow [2024-06-27 21:54:03,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:03,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:03,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:03,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:54:03,523 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:03,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:03,523 INFO L85 PathProgramCache]: Analyzing trace with hash -142812857, now seen corresponding path program 1 times [2024-06-27 21:54:03,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:03,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908602779] [2024-06-27 21:54:03,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:03,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:03,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:03,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908602779] [2024-06-27 21:54:03,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908602779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:03,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:03,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:03,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550154876] [2024-06-27 21:54:03,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:03,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:03,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:03,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:03,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 135 transitions, 1240 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:03,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:03,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:03,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:03,956 INFO L124 PetriNetUnfolderBase]: 2202/3612 cut-off events. [2024-06-27 21:54:03,956 INFO L125 PetriNetUnfolderBase]: For 33979/34027 co-relation queries the response was YES. [2024-06-27 21:54:04,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16574 conditions, 3612 events. 2202/3612 cut-off events. For 33979/34027 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22106 event pairs, 537 based on Foata normal form. 14/3536 useless extension candidates. Maximal degree in co-relation 16520. Up to 3190 conditions per place. [2024-06-27 21:54:04,019 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 116 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-27 21:54:04,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 157 transitions, 1608 flow [2024-06-27 21:54:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:54:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:54:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-27 21:54:04,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 21:54:04,020 INFO L175 Difference]: Start difference. First operand has 124 places, 135 transitions, 1240 flow. Second operand 5 states and 145 transitions. [2024-06-27 21:54:04,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 157 transitions, 1608 flow [2024-06-27 21:54:04,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 157 transitions, 1548 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:04,073 INFO L231 Difference]: Finished difference. Result has 127 places, 139 transitions, 1300 flow [2024-06-27 21:54:04,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1300, PETRI_PLACES=127, PETRI_TRANSITIONS=139} [2024-06-27 21:54:04,073 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 78 predicate places. [2024-06-27 21:54:04,073 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 139 transitions, 1300 flow [2024-06-27 21:54:04,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:04,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:04,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:04,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:54:04,074 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:04,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash -152428561, now seen corresponding path program 1 times [2024-06-27 21:54:04,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:04,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390135592] [2024-06-27 21:54:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:04,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:04,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:04,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390135592] [2024-06-27 21:54:04,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390135592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:04,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:04,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:04,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322550515] [2024-06-27 21:54:04,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:04,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:04,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:04,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:04,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 21:54:04,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 139 transitions, 1300 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:04,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:04,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 21:54:04,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:04,547 INFO L124 PetriNetUnfolderBase]: 2044/3582 cut-off events. [2024-06-27 21:54:04,548 INFO L125 PetriNetUnfolderBase]: For 36018/36085 co-relation queries the response was YES. [2024-06-27 21:54:04,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16038 conditions, 3582 events. 2044/3582 cut-off events. For 36018/36085 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22994 event pairs, 806 based on Foata normal form. 16/3479 useless extension candidates. Maximal degree in co-relation 15982. Up to 2934 conditions per place. [2024-06-27 21:54:04,570 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 120 selfloop transitions, 10 changer transitions 0/154 dead transitions. [2024-06-27 21:54:04,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 154 transitions, 1610 flow [2024-06-27 21:54:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:54:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:54:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-27 21:54:04,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-06-27 21:54:04,571 INFO L175 Difference]: Start difference. First operand has 127 places, 139 transitions, 1300 flow. Second operand 4 states and 119 transitions. [2024-06-27 21:54:04,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 154 transitions, 1610 flow [2024-06-27 21:54:04,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 154 transitions, 1548 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:04,624 INFO L231 Difference]: Finished difference. Result has 128 places, 141 transitions, 1287 flow [2024-06-27 21:54:04,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1287, PETRI_PLACES=128, PETRI_TRANSITIONS=141} [2024-06-27 21:54:04,625 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 79 predicate places. [2024-06-27 21:54:04,625 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 141 transitions, 1287 flow [2024-06-27 21:54:04,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:04,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:04,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:04,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:54:04,625 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:04,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:04,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1061655300, now seen corresponding path program 1 times [2024-06-27 21:54:04,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:04,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401925006] [2024-06-27 21:54:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:04,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:04,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:04,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401925006] [2024-06-27 21:54:04,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401925006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:04,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:04,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:04,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430381570] [2024-06-27 21:54:04,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:04,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:04,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:04,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:04,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 141 transitions, 1287 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:04,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:04,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:04,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:05,220 INFO L124 PetriNetUnfolderBase]: 2359/3859 cut-off events. [2024-06-27 21:54:05,220 INFO L125 PetriNetUnfolderBase]: For 37977/37981 co-relation queries the response was YES. [2024-06-27 21:54:05,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17983 conditions, 3859 events. 2359/3859 cut-off events. For 37977/37981 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 23682 event pairs, 505 based on Foata normal form. 1/3854 useless extension candidates. Maximal degree in co-relation 17925. Up to 3356 conditions per place. [2024-06-27 21:54:05,241 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 141 selfloop transitions, 38 changer transitions 0/191 dead transitions. [2024-06-27 21:54:05,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 191 transitions, 2027 flow [2024-06-27 21:54:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 21:54:05,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-27 21:54:05,242 INFO L175 Difference]: Start difference. First operand has 128 places, 141 transitions, 1287 flow. Second operand 6 states and 172 transitions. [2024-06-27 21:54:05,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 191 transitions, 2027 flow [2024-06-27 21:54:05,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 191 transitions, 1994 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 21:54:05,300 INFO L231 Difference]: Finished difference. Result has 133 places, 157 transitions, 1553 flow [2024-06-27 21:54:05,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1553, PETRI_PLACES=133, PETRI_TRANSITIONS=157} [2024-06-27 21:54:05,301 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 84 predicate places. [2024-06-27 21:54:05,301 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 157 transitions, 1553 flow [2024-06-27 21:54:05,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:05,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:05,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:05,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:54:05,301 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:05,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:05,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1056893700, now seen corresponding path program 2 times [2024-06-27 21:54:05,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:05,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385369701] [2024-06-27 21:54:05,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:05,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:05,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:05,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385369701] [2024-06-27 21:54:05,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385369701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:05,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:05,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:05,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742121357] [2024-06-27 21:54:05,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:05,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:05,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:05,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:05,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:05,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 157 transitions, 1553 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:05,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:05,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:05,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:05,887 INFO L124 PetriNetUnfolderBase]: 2387/3983 cut-off events. [2024-06-27 21:54:05,887 INFO L125 PetriNetUnfolderBase]: For 42416/42418 co-relation queries the response was YES. [2024-06-27 21:54:05,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18927 conditions, 3983 events. 2387/3983 cut-off events. For 42416/42418 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24936 event pairs, 630 based on Foata normal form. 1/3980 useless extension candidates. Maximal degree in co-relation 18867. Up to 3449 conditions per place. [2024-06-27 21:54:05,912 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 152 selfloop transitions, 29 changer transitions 0/193 dead transitions. [2024-06-27 21:54:05,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 193 transitions, 2083 flow [2024-06-27 21:54:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-27 21:54:05,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-27 21:54:05,913 INFO L175 Difference]: Start difference. First operand has 133 places, 157 transitions, 1553 flow. Second operand 6 states and 167 transitions. [2024-06-27 21:54:05,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 193 transitions, 2083 flow [2024-06-27 21:54:05,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 193 transitions, 2027 flow, removed 28 selfloop flow, removed 0 redundant places. [2024-06-27 21:54:05,985 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 1668 flow [2024-06-27 21:54:05,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1668, PETRI_PLACES=139, PETRI_TRANSITIONS=165} [2024-06-27 21:54:05,986 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 90 predicate places. [2024-06-27 21:54:05,986 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 1668 flow [2024-06-27 21:54:05,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:05,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:05,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:05,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:54:05,986 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:05,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:05,987 INFO L85 PathProgramCache]: Analyzing trace with hash 901625886, now seen corresponding path program 3 times [2024-06-27 21:54:05,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:05,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580973498] [2024-06-27 21:54:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:05,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:06,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:06,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580973498] [2024-06-27 21:54:06,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580973498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:06,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:06,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806898193] [2024-06-27 21:54:06,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:06,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:06,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:06,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:06,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 165 transitions, 1668 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:06,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:06,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:06,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:06,594 INFO L124 PetriNetUnfolderBase]: 2401/4036 cut-off events. [2024-06-27 21:54:06,594 INFO L125 PetriNetUnfolderBase]: For 45478/45480 co-relation queries the response was YES. [2024-06-27 21:54:06,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19308 conditions, 4036 events. 2401/4036 cut-off events. For 45478/45480 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 25492 event pairs, 632 based on Foata normal form. 3/4032 useless extension candidates. Maximal degree in co-relation 19245. Up to 3405 conditions per place. [2024-06-27 21:54:06,621 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 143 selfloop transitions, 44 changer transitions 0/199 dead transitions. [2024-06-27 21:54:06,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 199 transitions, 2288 flow [2024-06-27 21:54:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-27 21:54:06,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-27 21:54:06,622 INFO L175 Difference]: Start difference. First operand has 139 places, 165 transitions, 1668 flow. Second operand 6 states and 169 transitions. [2024-06-27 21:54:06,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 199 transitions, 2288 flow [2024-06-27 21:54:06,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 199 transitions, 2217 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:06,696 INFO L231 Difference]: Finished difference. Result has 141 places, 168 transitions, 1729 flow [2024-06-27 21:54:06,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1729, PETRI_PLACES=141, PETRI_TRANSITIONS=168} [2024-06-27 21:54:06,697 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 92 predicate places. [2024-06-27 21:54:06,697 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 168 transitions, 1729 flow [2024-06-27 21:54:06,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:06,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:06,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:06,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:54:06,698 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:06,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:06,698 INFO L85 PathProgramCache]: Analyzing trace with hash -888837120, now seen corresponding path program 4 times [2024-06-27 21:54:06,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:06,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280104982] [2024-06-27 21:54:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:06,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:06,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:06,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280104982] [2024-06-27 21:54:06,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280104982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:06,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:06,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:06,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955765267] [2024-06-27 21:54:06,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:06,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:06,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:06,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:06,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:06,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 168 transitions, 1729 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:06,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:06,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:06,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:07,352 INFO L124 PetriNetUnfolderBase]: 2415/4058 cut-off events. [2024-06-27 21:54:07,353 INFO L125 PetriNetUnfolderBase]: For 47904/47906 co-relation queries the response was YES. [2024-06-27 21:54:07,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19554 conditions, 4058 events. 2415/4058 cut-off events. For 47904/47906 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 25619 event pairs, 630 based on Foata normal form. 3/4054 useless extension candidates. Maximal degree in co-relation 19491. Up to 3420 conditions per place. [2024-06-27 21:54:07,378 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 140 selfloop transitions, 46 changer transitions 0/198 dead transitions. [2024-06-27 21:54:07,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 198 transitions, 2289 flow [2024-06-27 21:54:07,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-27 21:54:07,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 21:54:07,380 INFO L175 Difference]: Start difference. First operand has 141 places, 168 transitions, 1729 flow. Second operand 6 states and 165 transitions. [2024-06-27 21:54:07,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 198 transitions, 2289 flow [2024-06-27 21:54:07,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 198 transitions, 2178 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:07,464 INFO L231 Difference]: Finished difference. Result has 143 places, 171 transitions, 1760 flow [2024-06-27 21:54:07,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1760, PETRI_PLACES=143, PETRI_TRANSITIONS=171} [2024-06-27 21:54:07,465 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 94 predicate places. [2024-06-27 21:54:07,465 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 171 transitions, 1760 flow [2024-06-27 21:54:07,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:07,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:07,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:07,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:54:07,465 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:07,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:07,466 INFO L85 PathProgramCache]: Analyzing trace with hash 623539368, now seen corresponding path program 5 times [2024-06-27 21:54:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:07,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516925248] [2024-06-27 21:54:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:07,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:07,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:07,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516925248] [2024-06-27 21:54:07,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516925248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:07,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:07,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:07,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675000448] [2024-06-27 21:54:07,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:07,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:07,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:07,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:07,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:07,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:07,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 171 transitions, 1760 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:07,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:07,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:07,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:08,143 INFO L124 PetriNetUnfolderBase]: 2432/3981 cut-off events. [2024-06-27 21:54:08,144 INFO L125 PetriNetUnfolderBase]: For 48341/48341 co-relation queries the response was YES. [2024-06-27 21:54:08,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19580 conditions, 3981 events. 2432/3981 cut-off events. For 48341/48341 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24610 event pairs, 492 based on Foata normal form. 1/3979 useless extension candidates. Maximal degree in co-relation 19517. Up to 3422 conditions per place. [2024-06-27 21:54:08,169 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 158 selfloop transitions, 55 changer transitions 0/225 dead transitions. [2024-06-27 21:54:08,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 225 transitions, 2546 flow [2024-06-27 21:54:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 21:54:08,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 21:54:08,217 INFO L175 Difference]: Start difference. First operand has 143 places, 171 transitions, 1760 flow. Second operand 7 states and 202 transitions. [2024-06-27 21:54:08,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 225 transitions, 2546 flow [2024-06-27 21:54:08,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 225 transitions, 2451 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 21:54:08,300 INFO L231 Difference]: Finished difference. Result has 150 places, 186 transitions, 2049 flow [2024-06-27 21:54:08,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2049, PETRI_PLACES=150, PETRI_TRANSITIONS=186} [2024-06-27 21:54:08,300 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2024-06-27 21:54:08,301 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 186 transitions, 2049 flow [2024-06-27 21:54:08,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:08,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:08,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:08,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:54:08,301 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:08,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:08,302 INFO L85 PathProgramCache]: Analyzing trace with hash 623718858, now seen corresponding path program 6 times [2024-06-27 21:54:08,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:08,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705989444] [2024-06-27 21:54:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:08,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:08,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:08,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705989444] [2024-06-27 21:54:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705989444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:08,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:08,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:08,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039508573] [2024-06-27 21:54:08,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:08,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:08,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:08,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:08,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:08,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:08,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 186 transitions, 2049 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:08,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:08,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:08,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:08,935 INFO L124 PetriNetUnfolderBase]: 2429/3983 cut-off events. [2024-06-27 21:54:08,935 INFO L125 PetriNetUnfolderBase]: For 53040/53040 co-relation queries the response was YES. [2024-06-27 21:54:08,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20149 conditions, 3983 events. 2429/3983 cut-off events. For 53040/53040 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24719 event pairs, 528 based on Foata normal form. 1/3973 useless extension candidates. Maximal degree in co-relation 20083. Up to 3419 conditions per place. [2024-06-27 21:54:08,961 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 143 selfloop transitions, 53 changer transitions 0/208 dead transitions. [2024-06-27 21:54:08,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 208 transitions, 2503 flow [2024-06-27 21:54:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:54:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:54:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 21:54:08,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-06-27 21:54:08,962 INFO L175 Difference]: Start difference. First operand has 150 places, 186 transitions, 2049 flow. Second operand 5 states and 146 transitions. [2024-06-27 21:54:08,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 208 transitions, 2503 flow [2024-06-27 21:54:09,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 208 transitions, 2403 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:09,050 INFO L231 Difference]: Finished difference. Result has 152 places, 186 transitions, 2066 flow [2024-06-27 21:54:09,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1949, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2066, PETRI_PLACES=152, PETRI_TRANSITIONS=186} [2024-06-27 21:54:09,051 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 103 predicate places. [2024-06-27 21:54:09,051 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 186 transitions, 2066 flow [2024-06-27 21:54:09,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:09,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:09,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:09,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:54:09,051 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:09,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:09,051 INFO L85 PathProgramCache]: Analyzing trace with hash 910205694, now seen corresponding path program 1 times [2024-06-27 21:54:09,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:09,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148447618] [2024-06-27 21:54:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:09,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:09,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:09,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148447618] [2024-06-27 21:54:09,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148447618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:09,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:09,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:09,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440572730] [2024-06-27 21:54:09,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:09,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:09,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:09,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:09,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 186 transitions, 2066 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:09,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:09,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:09,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:09,680 INFO L124 PetriNetUnfolderBase]: 2398/4280 cut-off events. [2024-06-27 21:54:09,680 INFO L125 PetriNetUnfolderBase]: For 61056/61083 co-relation queries the response was YES. [2024-06-27 21:54:09,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20574 conditions, 4280 events. 2398/4280 cut-off events. For 61056/61083 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28659 event pairs, 823 based on Foata normal form. 10/4268 useless extension candidates. Maximal degree in co-relation 20508. Up to 3241 conditions per place. [2024-06-27 21:54:09,711 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 163 selfloop transitions, 36 changer transitions 0/220 dead transitions. [2024-06-27 21:54:09,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 220 transitions, 2668 flow [2024-06-27 21:54:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 21:54:09,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:54:09,712 INFO L175 Difference]: Start difference. First operand has 152 places, 186 transitions, 2066 flow. Second operand 6 states and 177 transitions. [2024-06-27 21:54:09,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 220 transitions, 2668 flow [2024-06-27 21:54:09,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 220 transitions, 2548 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:09,820 INFO L231 Difference]: Finished difference. Result has 154 places, 190 transitions, 2081 flow [2024-06-27 21:54:09,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2081, PETRI_PLACES=154, PETRI_TRANSITIONS=190} [2024-06-27 21:54:09,820 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 105 predicate places. [2024-06-27 21:54:09,820 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 190 transitions, 2081 flow [2024-06-27 21:54:09,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:09,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:09,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:09,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:54:09,821 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:09,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:09,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1061070812, now seen corresponding path program 2 times [2024-06-27 21:54:09,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:09,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412281134] [2024-06-27 21:54:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:09,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:09,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412281134] [2024-06-27 21:54:09,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412281134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:09,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:09,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:09,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255706259] [2024-06-27 21:54:09,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:09,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:09,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:09,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:09,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:09,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:09,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 190 transitions, 2081 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:09,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:09,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:09,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:10,382 INFO L124 PetriNetUnfolderBase]: 2496/4450 cut-off events. [2024-06-27 21:54:10,382 INFO L125 PetriNetUnfolderBase]: For 66174/66198 co-relation queries the response was YES. [2024-06-27 21:54:10,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21384 conditions, 4450 events. 2496/4450 cut-off events. For 66174/66198 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 30033 event pairs, 911 based on Foata normal form. 15/4448 useless extension candidates. Maximal degree in co-relation 21317. Up to 3488 conditions per place. [2024-06-27 21:54:10,411 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 162 selfloop transitions, 34 changer transitions 0/217 dead transitions. [2024-06-27 21:54:10,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 217 transitions, 2579 flow [2024-06-27 21:54:10,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:10,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 21:54:10,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-27 21:54:10,412 INFO L175 Difference]: Start difference. First operand has 154 places, 190 transitions, 2081 flow. Second operand 6 states and 173 transitions. [2024-06-27 21:54:10,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 217 transitions, 2579 flow [2024-06-27 21:54:10,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 217 transitions, 2497 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:10,528 INFO L231 Difference]: Finished difference. Result has 157 places, 192 transitions, 2108 flow [2024-06-27 21:54:10,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2108, PETRI_PLACES=157, PETRI_TRANSITIONS=192} [2024-06-27 21:54:10,528 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 108 predicate places. [2024-06-27 21:54:10,528 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 192 transitions, 2108 flow [2024-06-27 21:54:10,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:10,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:10,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:10,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:54:10,529 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:10,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:10,529 INFO L85 PathProgramCache]: Analyzing trace with hash -436996482, now seen corresponding path program 3 times [2024-06-27 21:54:10,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:10,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176384699] [2024-06-27 21:54:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:10,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:10,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:10,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176384699] [2024-06-27 21:54:10,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176384699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:10,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:10,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:10,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746367489] [2024-06-27 21:54:10,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:10,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:10,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:10,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:10,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:10,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 192 transitions, 2108 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:10,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:10,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:10,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:11,098 INFO L124 PetriNetUnfolderBase]: 2453/4074 cut-off events. [2024-06-27 21:54:11,098 INFO L125 PetriNetUnfolderBase]: For 61561/61635 co-relation queries the response was YES. [2024-06-27 21:54:11,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20374 conditions, 4074 events. 2453/4074 cut-off events. For 61561/61635 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25653 event pairs, 545 based on Foata normal form. 35/3993 useless extension candidates. Maximal degree in co-relation 20306. Up to 3388 conditions per place. [2024-06-27 21:54:11,127 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 165 selfloop transitions, 31 changer transitions 0/217 dead transitions. [2024-06-27 21:54:11,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 217 transitions, 2578 flow [2024-06-27 21:54:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:54:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:54:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-27 21:54:11,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2024-06-27 21:54:11,128 INFO L175 Difference]: Start difference. First operand has 157 places, 192 transitions, 2108 flow. Second operand 5 states and 152 transitions. [2024-06-27 21:54:11,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 217 transitions, 2578 flow [2024-06-27 21:54:11,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 217 transitions, 2505 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:11,267 INFO L231 Difference]: Finished difference. Result has 158 places, 192 transitions, 2113 flow [2024-06-27 21:54:11,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2113, PETRI_PLACES=158, PETRI_TRANSITIONS=192} [2024-06-27 21:54:11,268 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 109 predicate places. [2024-06-27 21:54:11,268 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 192 transitions, 2113 flow [2024-06-27 21:54:11,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:11,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:11,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:11,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:54:11,269 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:11,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:11,269 INFO L85 PathProgramCache]: Analyzing trace with hash 873939922, now seen corresponding path program 1 times [2024-06-27 21:54:11,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:11,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197108849] [2024-06-27 21:54:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:11,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:11,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:11,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197108849] [2024-06-27 21:54:11,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197108849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:11,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:11,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:11,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627356261] [2024-06-27 21:54:11,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:11,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:11,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:11,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:11,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:11,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:11,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 192 transitions, 2113 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:11,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:11,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:11,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:11,781 INFO L124 PetriNetUnfolderBase]: 2502/4148 cut-off events. [2024-06-27 21:54:11,781 INFO L125 PetriNetUnfolderBase]: For 60155/60231 co-relation queries the response was YES. [2024-06-27 21:54:11,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20860 conditions, 4148 events. 2502/4148 cut-off events. For 60155/60231 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26228 event pairs, 606 based on Foata normal form. 21/4084 useless extension candidates. Maximal degree in co-relation 20791. Up to 3371 conditions per place. [2024-06-27 21:54:11,811 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 144 selfloop transitions, 74 changer transitions 0/239 dead transitions. [2024-06-27 21:54:11,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 239 transitions, 2905 flow [2024-06-27 21:54:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 21:54:11,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 21:54:11,812 INFO L175 Difference]: Start difference. First operand has 158 places, 192 transitions, 2113 flow. Second operand 7 states and 205 transitions. [2024-06-27 21:54:11,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 239 transitions, 2905 flow [2024-06-27 21:54:11,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 239 transitions, 2834 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:11,976 INFO L231 Difference]: Finished difference. Result has 162 places, 207 transitions, 2398 flow [2024-06-27 21:54:11,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2398, PETRI_PLACES=162, PETRI_TRANSITIONS=207} [2024-06-27 21:54:11,977 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2024-06-27 21:54:11,977 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 207 transitions, 2398 flow [2024-06-27 21:54:11,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:11,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:11,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:11,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:54:11,977 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:11,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:11,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1556269624, now seen corresponding path program 2 times [2024-06-27 21:54:11,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:11,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481668852] [2024-06-27 21:54:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:11,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:12,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:12,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481668852] [2024-06-27 21:54:12,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481668852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:12,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:12,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:12,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827298466] [2024-06-27 21:54:12,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:12,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:12,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:12,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:12,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:12,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:12,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 207 transitions, 2398 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:12,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:12,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:12,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:12,595 INFO L124 PetriNetUnfolderBase]: 2576/4234 cut-off events. [2024-06-27 21:54:12,595 INFO L125 PetriNetUnfolderBase]: For 66573/66619 co-relation queries the response was YES. [2024-06-27 21:54:12,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22280 conditions, 4234 events. 2576/4234 cut-off events. For 66573/66619 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26573 event pairs, 571 based on Foata normal form. 23/4188 useless extension candidates. Maximal degree in co-relation 22209. Up to 3579 conditions per place. [2024-06-27 21:54:12,625 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 177 selfloop transitions, 58 changer transitions 0/256 dead transitions. [2024-06-27 21:54:12,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 256 transitions, 3275 flow [2024-06-27 21:54:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 21:54:12,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 21:54:12,626 INFO L175 Difference]: Start difference. First operand has 162 places, 207 transitions, 2398 flow. Second operand 7 states and 203 transitions. [2024-06-27 21:54:12,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 256 transitions, 3275 flow [2024-06-27 21:54:12,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 256 transitions, 3185 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-27 21:54:12,794 INFO L231 Difference]: Finished difference. Result has 168 places, 225 transitions, 2715 flow [2024-06-27 21:54:12,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2715, PETRI_PLACES=168, PETRI_TRANSITIONS=225} [2024-06-27 21:54:12,794 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 119 predicate places. [2024-06-27 21:54:12,794 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 225 transitions, 2715 flow [2024-06-27 21:54:12,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:12,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:12,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:12,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:54:12,795 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:12,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1556062234, now seen corresponding path program 3 times [2024-06-27 21:54:12,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:12,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107339582] [2024-06-27 21:54:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:12,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:12,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:12,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107339582] [2024-06-27 21:54:12,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107339582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:12,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:12,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:12,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064968720] [2024-06-27 21:54:12,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:12,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:12,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:12,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:12,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:12,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:12,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 225 transitions, 2715 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:12,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:12,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:12,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:13,389 INFO L124 PetriNetUnfolderBase]: 2552/4294 cut-off events. [2024-06-27 21:54:13,389 INFO L125 PetriNetUnfolderBase]: For 71471/71518 co-relation queries the response was YES. [2024-06-27 21:54:13,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22969 conditions, 4294 events. 2552/4294 cut-off events. For 71471/71518 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 27669 event pairs, 698 based on Foata normal form. 23/4255 useless extension candidates. Maximal degree in co-relation 22895. Up to 3545 conditions per place. [2024-06-27 21:54:13,424 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 180 selfloop transitions, 60 changer transitions 0/261 dead transitions. [2024-06-27 21:54:13,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 261 transitions, 3309 flow [2024-06-27 21:54:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:54:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:54:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-27 21:54:13,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6172839506172839 [2024-06-27 21:54:13,425 INFO L175 Difference]: Start difference. First operand has 168 places, 225 transitions, 2715 flow. Second operand 9 states and 250 transitions. [2024-06-27 21:54:13,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 261 transitions, 3309 flow [2024-06-27 21:54:13,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 261 transitions, 3178 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:13,593 INFO L231 Difference]: Finished difference. Result has 174 places, 225 transitions, 2714 flow [2024-06-27 21:54:13,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2584, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2714, PETRI_PLACES=174, PETRI_TRANSITIONS=225} [2024-06-27 21:54:13,593 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 125 predicate places. [2024-06-27 21:54:13,593 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 225 transitions, 2714 flow [2024-06-27 21:54:13,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:13,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:13,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:13,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:54:13,594 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:13,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:13,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1596250642, now seen corresponding path program 1 times [2024-06-27 21:54:13,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:13,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256865475] [2024-06-27 21:54:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:13,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:13,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:13,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256865475] [2024-06-27 21:54:13,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256865475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:13,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:13,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:13,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840246891] [2024-06-27 21:54:13,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:13,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:13,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:13,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:13,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 21:54:13,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 225 transitions, 2714 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:13,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:13,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 21:54:13,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:14,203 INFO L124 PetriNetUnfolderBase]: 2551/4215 cut-off events. [2024-06-27 21:54:14,203 INFO L125 PetriNetUnfolderBase]: For 78443/78486 co-relation queries the response was YES. [2024-06-27 21:54:14,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23049 conditions, 4215 events. 2551/4215 cut-off events. For 78443/78486 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26655 event pairs, 558 based on Foata normal form. 35/4140 useless extension candidates. Maximal degree in co-relation 22973. Up to 3397 conditions per place. [2024-06-27 21:54:14,232 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 175 selfloop transitions, 37 changer transitions 0/257 dead transitions. [2024-06-27 21:54:14,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 257 transitions, 3242 flow [2024-06-27 21:54:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 21:54:14,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-27 21:54:14,233 INFO L175 Difference]: Start difference. First operand has 174 places, 225 transitions, 2714 flow. Second operand 7 states and 204 transitions. [2024-06-27 21:54:14,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 257 transitions, 3242 flow [2024-06-27 21:54:14,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 257 transitions, 3112 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:54:14,423 INFO L231 Difference]: Finished difference. Result has 174 places, 226 transitions, 2678 flow [2024-06-27 21:54:14,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2584, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2678, PETRI_PLACES=174, PETRI_TRANSITIONS=226} [2024-06-27 21:54:14,424 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 125 predicate places. [2024-06-27 21:54:14,424 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 226 transitions, 2678 flow [2024-06-27 21:54:14,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:14,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:14,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:14,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:54:14,424 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:14,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:14,424 INFO L85 PathProgramCache]: Analyzing trace with hash -651659930, now seen corresponding path program 4 times [2024-06-27 21:54:14,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:14,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287891311] [2024-06-27 21:54:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:14,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:14,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:14,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287891311] [2024-06-27 21:54:14,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287891311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:14,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:14,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:14,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986913051] [2024-06-27 21:54:14,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:14,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:14,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:14,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:14,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 226 transitions, 2678 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:14,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:14,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:14,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:14,960 INFO L124 PetriNetUnfolderBase]: 2640/4412 cut-off events. [2024-06-27 21:54:14,960 INFO L125 PetriNetUnfolderBase]: For 77112/77184 co-relation queries the response was YES. [2024-06-27 21:54:14,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23759 conditions, 4412 events. 2640/4412 cut-off events. For 77112/77184 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28556 event pairs, 665 based on Foata normal form. 23/4304 useless extension candidates. Maximal degree in co-relation 23682. Up to 3550 conditions per place. [2024-06-27 21:54:14,991 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 152 selfloop transitions, 86 changer transitions 0/259 dead transitions. [2024-06-27 21:54:14,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 259 transitions, 3426 flow [2024-06-27 21:54:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 21:54:14,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 21:54:14,992 INFO L175 Difference]: Start difference. First operand has 174 places, 226 transitions, 2678 flow. Second operand 7 states and 202 transitions. [2024-06-27 21:54:14,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 259 transitions, 3426 flow [2024-06-27 21:54:15,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 259 transitions, 3352 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:15,168 INFO L231 Difference]: Finished difference. Result has 176 places, 230 transitions, 2836 flow [2024-06-27 21:54:15,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2836, PETRI_PLACES=176, PETRI_TRANSITIONS=230} [2024-06-27 21:54:15,168 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 127 predicate places. [2024-06-27 21:54:15,168 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 230 transitions, 2836 flow [2024-06-27 21:54:15,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:15,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:15,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:15,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:54:15,169 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:15,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1466818316, now seen corresponding path program 5 times [2024-06-27 21:54:15,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:15,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431482823] [2024-06-27 21:54:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:15,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:15,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:15,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431482823] [2024-06-27 21:54:15,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431482823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:15,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:15,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:15,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450601794] [2024-06-27 21:54:15,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:15,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:15,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:15,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:15,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:15,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:15,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 230 transitions, 2836 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:15,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:15,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:15,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:15,793 INFO L124 PetriNetUnfolderBase]: 2707/4454 cut-off events. [2024-06-27 21:54:15,793 INFO L125 PetriNetUnfolderBase]: For 80482/80523 co-relation queries the response was YES. [2024-06-27 21:54:15,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24568 conditions, 4454 events. 2707/4454 cut-off events. For 80482/80523 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28373 event pairs, 613 based on Foata normal form. 12/4406 useless extension candidates. Maximal degree in co-relation 24490. Up to 3650 conditions per place. [2024-06-27 21:54:15,822 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 152 selfloop transitions, 89 changer transitions 0/262 dead transitions. [2024-06-27 21:54:15,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 262 transitions, 3622 flow [2024-06-27 21:54:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 21:54:15,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 21:54:15,823 INFO L175 Difference]: Start difference. First operand has 176 places, 230 transitions, 2836 flow. Second operand 7 states and 200 transitions. [2024-06-27 21:54:15,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 262 transitions, 3622 flow [2024-06-27 21:54:16,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 262 transitions, 3455 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:16,014 INFO L231 Difference]: Finished difference. Result has 180 places, 236 transitions, 2943 flow [2024-06-27 21:54:16,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2943, PETRI_PLACES=180, PETRI_TRANSITIONS=236} [2024-06-27 21:54:16,015 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 131 predicate places. [2024-06-27 21:54:16,015 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 236 transitions, 2943 flow [2024-06-27 21:54:16,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:16,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:16,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:16,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:54:16,016 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:16,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1466402606, now seen corresponding path program 6 times [2024-06-27 21:54:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:16,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356146958] [2024-06-27 21:54:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:16,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:16,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:16,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356146958] [2024-06-27 21:54:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356146958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:16,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:16,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:16,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785363224] [2024-06-27 21:54:16,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:16,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:16,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:16,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:16,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:16,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 236 transitions, 2943 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:16,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:16,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:16,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:16,605 INFO L124 PetriNetUnfolderBase]: 2684/4707 cut-off events. [2024-06-27 21:54:16,605 INFO L125 PetriNetUnfolderBase]: For 84515/84567 co-relation queries the response was YES. [2024-06-27 21:54:16,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24635 conditions, 4707 events. 2684/4707 cut-off events. For 84515/84567 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 31790 event pairs, 916 based on Foata normal form. 19/4658 useless extension candidates. Maximal degree in co-relation 24555. Up to 3840 conditions per place. [2024-06-27 21:54:16,642 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 203 selfloop transitions, 36 changer transitions 0/260 dead transitions. [2024-06-27 21:54:16,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 260 transitions, 3475 flow [2024-06-27 21:54:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-27 21:54:16,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126984126984127 [2024-06-27 21:54:16,643 INFO L175 Difference]: Start difference. First operand has 180 places, 236 transitions, 2943 flow. Second operand 7 states and 193 transitions. [2024-06-27 21:54:16,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 260 transitions, 3475 flow [2024-06-27 21:54:16,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 260 transitions, 3330 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:16,789 INFO L231 Difference]: Finished difference. Result has 184 places, 236 transitions, 2876 flow [2024-06-27 21:54:16,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2876, PETRI_PLACES=184, PETRI_TRANSITIONS=236} [2024-06-27 21:54:16,789 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 135 predicate places. [2024-06-27 21:54:16,789 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 236 transitions, 2876 flow [2024-06-27 21:54:16,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:16,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:16,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:16,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:54:16,790 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:16,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:16,790 INFO L85 PathProgramCache]: Analyzing trace with hash -661848464, now seen corresponding path program 7 times [2024-06-27 21:54:16,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:16,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109552940] [2024-06-27 21:54:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:16,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:16,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:16,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109552940] [2024-06-27 21:54:16,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109552940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:16,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:16,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:16,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608015831] [2024-06-27 21:54:16,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:16,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:16,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:16,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:16,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:16,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 236 transitions, 2876 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:16,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:16,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:16,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:17,509 INFO L124 PetriNetUnfolderBase]: 2712/4452 cut-off events. [2024-06-27 21:54:17,510 INFO L125 PetriNetUnfolderBase]: For 85001/85047 co-relation queries the response was YES. [2024-06-27 21:54:17,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24379 conditions, 4452 events. 2712/4452 cut-off events. For 85001/85047 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28243 event pairs, 585 based on Foata normal form. 18/4394 useless extension candidates. Maximal degree in co-relation 24298. Up to 3896 conditions per place. [2024-06-27 21:54:17,547 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 207 selfloop transitions, 32 changer transitions 0/260 dead transitions. [2024-06-27 21:54:17,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 260 transitions, 3445 flow [2024-06-27 21:54:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-27 21:54:17,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-27 21:54:17,548 INFO L175 Difference]: Start difference. First operand has 184 places, 236 transitions, 2876 flow. Second operand 6 states and 169 transitions. [2024-06-27 21:54:17,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 260 transitions, 3445 flow [2024-06-27 21:54:17,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 260 transitions, 3348 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:54:17,745 INFO L231 Difference]: Finished difference. Result has 184 places, 239 transitions, 2898 flow [2024-06-27 21:54:17,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2898, PETRI_PLACES=184, PETRI_TRANSITIONS=239} [2024-06-27 21:54:17,745 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 135 predicate places. [2024-06-27 21:54:17,746 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 239 transitions, 2898 flow [2024-06-27 21:54:17,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:17,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:17,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:17,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:54:17,746 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:17,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:17,747 INFO L85 PathProgramCache]: Analyzing trace with hash 34924754, now seen corresponding path program 8 times [2024-06-27 21:54:17,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:17,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480362360] [2024-06-27 21:54:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:17,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:17,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:17,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480362360] [2024-06-27 21:54:17,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480362360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:17,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:17,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:17,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482651902] [2024-06-27 21:54:17,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:17,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:17,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:17,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:17,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:17,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:17,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 239 transitions, 2898 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:17,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:17,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:17,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:18,346 INFO L124 PetriNetUnfolderBase]: 2751/4535 cut-off events. [2024-06-27 21:54:18,346 INFO L125 PetriNetUnfolderBase]: For 89846/89889 co-relation queries the response was YES. [2024-06-27 21:54:18,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24847 conditions, 4535 events. 2751/4535 cut-off events. For 89846/89889 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29069 event pairs, 644 based on Foata normal form. 19/4503 useless extension candidates. Maximal degree in co-relation 24765. Up to 3647 conditions per place. [2024-06-27 21:54:18,380 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 135 selfloop transitions, 115 changer transitions 0/271 dead transitions. [2024-06-27 21:54:18,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 271 transitions, 3721 flow [2024-06-27 21:54:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 21:54:18,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:54:18,384 INFO L175 Difference]: Start difference. First operand has 184 places, 239 transitions, 2898 flow. Second operand 6 states and 180 transitions. [2024-06-27 21:54:18,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 271 transitions, 3721 flow [2024-06-27 21:54:18,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 271 transitions, 3641 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:18,624 INFO L231 Difference]: Finished difference. Result has 187 places, 245 transitions, 3236 flow [2024-06-27 21:54:18,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3236, PETRI_PLACES=187, PETRI_TRANSITIONS=245} [2024-06-27 21:54:18,625 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 138 predicate places. [2024-06-27 21:54:18,625 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 245 transitions, 3236 flow [2024-06-27 21:54:18,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:18,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:18,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:18,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:54:18,626 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:18,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:18,626 INFO L85 PathProgramCache]: Analyzing trace with hash -868917614, now seen corresponding path program 9 times [2024-06-27 21:54:18,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:18,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930195435] [2024-06-27 21:54:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:18,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:18,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:18,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930195435] [2024-06-27 21:54:18,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930195435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:18,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:18,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:18,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003406764] [2024-06-27 21:54:18,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:18,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:18,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:18,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:18,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:18,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 245 transitions, 3236 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:18,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:18,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:18,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:19,299 INFO L124 PetriNetUnfolderBase]: 2749/4579 cut-off events. [2024-06-27 21:54:19,299 INFO L125 PetriNetUnfolderBase]: For 99748/99808 co-relation queries the response was YES. [2024-06-27 21:54:19,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26174 conditions, 4579 events. 2749/4579 cut-off events. For 99748/99808 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29636 event pairs, 650 based on Foata normal form. 18/4514 useless extension candidates. Maximal degree in co-relation 26090. Up to 3629 conditions per place. [2024-06-27 21:54:19,333 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 141 selfloop transitions, 130 changer transitions 0/292 dead transitions. [2024-06-27 21:54:19,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 292 transitions, 4153 flow [2024-06-27 21:54:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:54:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:54:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-27 21:54:19,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:54:19,337 INFO L175 Difference]: Start difference. First operand has 187 places, 245 transitions, 3236 flow. Second operand 8 states and 240 transitions. [2024-06-27 21:54:19,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 292 transitions, 4153 flow [2024-06-27 21:54:19,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 292 transitions, 3887 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:19,570 INFO L231 Difference]: Finished difference. Result has 191 places, 251 transitions, 3359 flow [2024-06-27 21:54:19,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3359, PETRI_PLACES=191, PETRI_TRANSITIONS=251} [2024-06-27 21:54:19,570 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 142 predicate places. [2024-06-27 21:54:19,570 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 251 transitions, 3359 flow [2024-06-27 21:54:19,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:19,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:19,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:19,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:54:19,571 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:19,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:19,571 INFO L85 PathProgramCache]: Analyzing trace with hash -868710224, now seen corresponding path program 10 times [2024-06-27 21:54:19,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:19,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973320233] [2024-06-27 21:54:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:19,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:19,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:19,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973320233] [2024-06-27 21:54:19,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973320233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:19,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:19,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:19,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145433020] [2024-06-27 21:54:19,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:19,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:19,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:19,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:19,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:19,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:19,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 251 transitions, 3359 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:19,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:19,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:19,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:20,259 INFO L124 PetriNetUnfolderBase]: 2754/4556 cut-off events. [2024-06-27 21:54:20,259 INFO L125 PetriNetUnfolderBase]: For 99923/100000 co-relation queries the response was YES. [2024-06-27 21:54:20,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25957 conditions, 4556 events. 2754/4556 cut-off events. For 99923/100000 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29288 event pairs, 617 based on Foata normal form. 30/4451 useless extension candidates. Maximal degree in co-relation 25872. Up to 3617 conditions per place. [2024-06-27 21:54:20,297 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 135 selfloop transitions, 142 changer transitions 0/298 dead transitions. [2024-06-27 21:54:20,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 298 transitions, 4209 flow [2024-06-27 21:54:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:54:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:54:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-06-27 21:54:20,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-06-27 21:54:20,298 INFO L175 Difference]: Start difference. First operand has 191 places, 251 transitions, 3359 flow. Second operand 9 states and 260 transitions. [2024-06-27 21:54:20,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 298 transitions, 4209 flow [2024-06-27 21:54:20,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 298 transitions, 3867 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 21:54:20,548 INFO L231 Difference]: Finished difference. Result has 193 places, 257 transitions, 3427 flow [2024-06-27 21:54:20,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3427, PETRI_PLACES=193, PETRI_TRANSITIONS=257} [2024-06-27 21:54:20,552 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 144 predicate places. [2024-06-27 21:54:20,552 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 257 transitions, 3427 flow [2024-06-27 21:54:20,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:20,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:20,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:20,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:54:20,553 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:20,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash 40702844, now seen corresponding path program 11 times [2024-06-27 21:54:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:20,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242323855] [2024-06-27 21:54:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:20,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242323855] [2024-06-27 21:54:20,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242323855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:20,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:20,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:20,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470885719] [2024-06-27 21:54:20,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:20,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:20,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:20,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:20,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:20,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 257 transitions, 3427 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:20,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:20,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:20,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:21,346 INFO L124 PetriNetUnfolderBase]: 2751/4558 cut-off events. [2024-06-27 21:54:21,346 INFO L125 PetriNetUnfolderBase]: For 96974/97051 co-relation queries the response was YES. [2024-06-27 21:54:21,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25830 conditions, 4558 events. 2751/4558 cut-off events. For 96974/97051 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 29344 event pairs, 624 based on Foata normal form. 21/4442 useless extension candidates. Maximal degree in co-relation 25745. Up to 3830 conditions per place. [2024-06-27 21:54:21,377 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 206 selfloop transitions, 69 changer transitions 0/296 dead transitions. [2024-06-27 21:54:21,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 296 transitions, 4174 flow [2024-06-27 21:54:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 21:54:21,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6730158730158731 [2024-06-27 21:54:21,377 INFO L175 Difference]: Start difference. First operand has 193 places, 257 transitions, 3427 flow. Second operand 7 states and 212 transitions. [2024-06-27 21:54:21,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 296 transitions, 4174 flow [2024-06-27 21:54:21,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 296 transitions, 3921 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 21:54:21,623 INFO L231 Difference]: Finished difference. Result has 194 places, 259 transitions, 3378 flow [2024-06-27 21:54:21,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3378, PETRI_PLACES=194, PETRI_TRANSITIONS=259} [2024-06-27 21:54:21,624 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 145 predicate places. [2024-06-27 21:54:21,624 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 259 transitions, 3378 flow [2024-06-27 21:54:21,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:21,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:21,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:21,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:54:21,624 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:21,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:21,625 INFO L85 PathProgramCache]: Analyzing trace with hash -469212914, now seen corresponding path program 12 times [2024-06-27 21:54:21,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:21,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361634452] [2024-06-27 21:54:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:21,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:21,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:21,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361634452] [2024-06-27 21:54:21,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361634452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:21,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:21,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:21,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183044280] [2024-06-27 21:54:21,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:21,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:21,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:21,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:21,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 259 transitions, 3378 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:21,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:21,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:21,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:22,343 INFO L124 PetriNetUnfolderBase]: 2784/4581 cut-off events. [2024-06-27 21:54:22,343 INFO L125 PetriNetUnfolderBase]: For 95169/95215 co-relation queries the response was YES. [2024-06-27 21:54:22,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25816 conditions, 4581 events. 2784/4581 cut-off events. For 95169/95215 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29209 event pairs, 593 based on Foata normal form. 18/4517 useless extension candidates. Maximal degree in co-relation 25730. Up to 3889 conditions per place. [2024-06-27 21:54:22,383 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 199 selfloop transitions, 69 changer transitions 0/289 dead transitions. [2024-06-27 21:54:22,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 289 transitions, 3986 flow [2024-06-27 21:54:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 21:54:22,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 21:54:22,384 INFO L175 Difference]: Start difference. First operand has 194 places, 259 transitions, 3378 flow. Second operand 6 states and 183 transitions. [2024-06-27 21:54:22,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 289 transitions, 3986 flow [2024-06-27 21:54:22,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 289 transitions, 3833 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:54:22,626 INFO L231 Difference]: Finished difference. Result has 194 places, 259 transitions, 3383 flow [2024-06-27 21:54:22,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3225, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3383, PETRI_PLACES=194, PETRI_TRANSITIONS=259} [2024-06-27 21:54:22,626 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 145 predicate places. [2024-06-27 21:54:22,626 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 259 transitions, 3383 flow [2024-06-27 21:54:22,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:22,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:22,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:22,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:54:22,627 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:22,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash -469204978, now seen corresponding path program 2 times [2024-06-27 21:54:22,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:22,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024626617] [2024-06-27 21:54:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:22,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:22,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024626617] [2024-06-27 21:54:22,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024626617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:22,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:22,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:22,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625358149] [2024-06-27 21:54:22,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:22,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:22,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:22,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:22,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:22,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 21:54:22,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 259 transitions, 3383 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:22,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:22,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 21:54:22,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:23,267 INFO L124 PetriNetUnfolderBase]: 2708/4538 cut-off events. [2024-06-27 21:54:23,268 INFO L125 PetriNetUnfolderBase]: For 98860/98942 co-relation queries the response was YES. [2024-06-27 21:54:23,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25261 conditions, 4538 events. 2708/4538 cut-off events. For 98860/98942 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 29760 event pairs, 573 based on Foata normal form. 47/4457 useless extension candidates. Maximal degree in co-relation 25176. Up to 3557 conditions per place. [2024-06-27 21:54:23,305 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 202 selfloop transitions, 31 changer transitions 0/288 dead transitions. [2024-06-27 21:54:23,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 288 transitions, 3953 flow [2024-06-27 21:54:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:54:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:54:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-27 21:54:23,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-27 21:54:23,306 INFO L175 Difference]: Start difference. First operand has 194 places, 259 transitions, 3383 flow. Second operand 5 states and 159 transitions. [2024-06-27 21:54:23,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 288 transitions, 3953 flow [2024-06-27 21:54:23,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 288 transitions, 3806 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:54:23,553 INFO L231 Difference]: Finished difference. Result has 193 places, 260 transitions, 3327 flow [2024-06-27 21:54:23,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3327, PETRI_PLACES=193, PETRI_TRANSITIONS=260} [2024-06-27 21:54:23,554 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 144 predicate places. [2024-06-27 21:54:23,554 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 260 transitions, 3327 flow [2024-06-27 21:54:23,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:23,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:23,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:23,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:54:23,555 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:23,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:23,555 INFO L85 PathProgramCache]: Analyzing trace with hash -868702288, now seen corresponding path program 3 times [2024-06-27 21:54:23,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:23,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369076791] [2024-06-27 21:54:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:23,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:23,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:23,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369076791] [2024-06-27 21:54:23,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369076791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:23,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:23,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:23,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959168723] [2024-06-27 21:54:23,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:23,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:23,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:23,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:23,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 21:54:23,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 260 transitions, 3327 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:23,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:23,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 21:54:23,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:24,205 INFO L124 PetriNetUnfolderBase]: 2761/4902 cut-off events. [2024-06-27 21:54:24,205 INFO L125 PetriNetUnfolderBase]: For 102267/102320 co-relation queries the response was YES. [2024-06-27 21:54:24,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26232 conditions, 4902 events. 2761/4902 cut-off events. For 102267/102320 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33994 event pairs, 910 based on Foata normal form. 32/4834 useless extension candidates. Maximal degree in co-relation 26147. Up to 3606 conditions per place. [2024-06-27 21:54:24,244 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 196 selfloop transitions, 38 changer transitions 0/289 dead transitions. [2024-06-27 21:54:24,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 289 transitions, 3899 flow [2024-06-27 21:54:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 21:54:24,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 21:54:24,245 INFO L175 Difference]: Start difference. First operand has 193 places, 260 transitions, 3327 flow. Second operand 6 states and 179 transitions. [2024-06-27 21:54:24,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 289 transitions, 3899 flow [2024-06-27 21:54:24,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 289 transitions, 3844 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:24,491 INFO L231 Difference]: Finished difference. Result has 196 places, 261 transitions, 3376 flow [2024-06-27 21:54:24,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3272, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3376, PETRI_PLACES=196, PETRI_TRANSITIONS=261} [2024-06-27 21:54:24,491 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 147 predicate places. [2024-06-27 21:54:24,491 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 261 transitions, 3376 flow [2024-06-27 21:54:24,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:24,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:24,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:24,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:54:24,492 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:24,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:24,492 INFO L85 PathProgramCache]: Analyzing trace with hash -454920178, now seen corresponding path program 4 times [2024-06-27 21:54:24,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:24,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352782588] [2024-06-27 21:54:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:24,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:24,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:24,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352782588] [2024-06-27 21:54:24,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352782588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:24,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:24,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:24,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884059644] [2024-06-27 21:54:24,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:24,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:24,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:24,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:24,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:24,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 21:54:24,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 261 transitions, 3376 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:24,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:24,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 21:54:24,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:25,189 INFO L124 PetriNetUnfolderBase]: 2813/4677 cut-off events. [2024-06-27 21:54:25,189 INFO L125 PetriNetUnfolderBase]: For 97528/97571 co-relation queries the response was YES. [2024-06-27 21:54:25,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26226 conditions, 4677 events. 2813/4677 cut-off events. For 97528/97571 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30462 event pairs, 458 based on Foata normal form. 35/4580 useless extension candidates. Maximal degree in co-relation 26140. Up to 3640 conditions per place. [2024-06-27 21:54:25,228 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 207 selfloop transitions, 34 changer transitions 0/296 dead transitions. [2024-06-27 21:54:25,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 296 transitions, 3990 flow [2024-06-27 21:54:25,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 21:54:25,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-27 21:54:25,229 INFO L175 Difference]: Start difference. First operand has 196 places, 261 transitions, 3376 flow. Second operand 6 states and 186 transitions. [2024-06-27 21:54:25,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 296 transitions, 3990 flow [2024-06-27 21:54:25,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 296 transitions, 3910 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:25,459 INFO L231 Difference]: Finished difference. Result has 198 places, 262 transitions, 3388 flow [2024-06-27 21:54:25,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3388, PETRI_PLACES=198, PETRI_TRANSITIONS=262} [2024-06-27 21:54:25,459 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 149 predicate places. [2024-06-27 21:54:25,459 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 262 transitions, 3388 flow [2024-06-27 21:54:25,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:25,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:25,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:25,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:54:25,460 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:25,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:25,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1848392910, now seen corresponding path program 1 times [2024-06-27 21:54:25,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:25,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406919812] [2024-06-27 21:54:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:25,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:25,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:25,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406919812] [2024-06-27 21:54:25,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406919812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:25,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:25,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:25,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524754291] [2024-06-27 21:54:25,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:25,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:25,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:25,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:25,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:25,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:25,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 262 transitions, 3388 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:25,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:25,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:25,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:26,204 INFO L124 PetriNetUnfolderBase]: 3051/5318 cut-off events. [2024-06-27 21:54:26,205 INFO L125 PetriNetUnfolderBase]: For 103742/103795 co-relation queries the response was YES. [2024-06-27 21:54:26,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28240 conditions, 5318 events. 3051/5318 cut-off events. For 103742/103795 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 36647 event pairs, 992 based on Foata normal form. 31/5264 useless extension candidates. Maximal degree in co-relation 28153. Up to 3980 conditions per place. [2024-06-27 21:54:26,247 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 241 selfloop transitions, 38 changer transitions 0/300 dead transitions. [2024-06-27 21:54:26,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 300 transitions, 4182 flow [2024-06-27 21:54:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 21:54:26,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 21:54:26,248 INFO L175 Difference]: Start difference. First operand has 198 places, 262 transitions, 3388 flow. Second operand 7 states and 202 transitions. [2024-06-27 21:54:26,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 300 transitions, 4182 flow [2024-06-27 21:54:26,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 300 transitions, 4106 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:26,484 INFO L231 Difference]: Finished difference. Result has 201 places, 264 transitions, 3422 flow [2024-06-27 21:54:26,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3422, PETRI_PLACES=201, PETRI_TRANSITIONS=264} [2024-06-27 21:54:26,485 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 152 predicate places. [2024-06-27 21:54:26,485 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 264 transitions, 3422 flow [2024-06-27 21:54:26,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:26,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:26,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:26,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:54:26,486 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:26,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:26,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1759827150, now seen corresponding path program 2 times [2024-06-27 21:54:26,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:26,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768675538] [2024-06-27 21:54:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:26,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:26,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:26,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768675538] [2024-06-27 21:54:26,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768675538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:26,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:26,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:26,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372117349] [2024-06-27 21:54:26,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:26,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:26,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:26,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:26,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:26,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 264 transitions, 3422 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:26,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:26,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:26,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:27,171 INFO L124 PetriNetUnfolderBase]: 3109/5128 cut-off events. [2024-06-27 21:54:27,172 INFO L125 PetriNetUnfolderBase]: For 104330/104376 co-relation queries the response was YES. [2024-06-27 21:54:27,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28449 conditions, 5128 events. 3109/5128 cut-off events. For 104330/104376 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 33639 event pairs, 662 based on Foata normal form. 23/5053 useless extension candidates. Maximal degree in co-relation 28361. Up to 4309 conditions per place. [2024-06-27 21:54:27,215 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 240 selfloop transitions, 35 changer transitions 0/296 dead transitions. [2024-06-27 21:54:27,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 296 transitions, 4098 flow [2024-06-27 21:54:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 21:54:27,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 21:54:27,216 INFO L175 Difference]: Start difference. First operand has 201 places, 264 transitions, 3422 flow. Second operand 7 states and 198 transitions. [2024-06-27 21:54:27,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 296 transitions, 4098 flow [2024-06-27 21:54:27,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 296 transitions, 4054 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:27,489 INFO L231 Difference]: Finished difference. Result has 205 places, 265 transitions, 3470 flow [2024-06-27 21:54:27,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3470, PETRI_PLACES=205, PETRI_TRANSITIONS=265} [2024-06-27 21:54:27,490 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 156 predicate places. [2024-06-27 21:54:27,490 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 265 transitions, 3470 flow [2024-06-27 21:54:27,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:27,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:27,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:27,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:54:27,491 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:27,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:27,491 INFO L85 PathProgramCache]: Analyzing trace with hash -661987406, now seen corresponding path program 3 times [2024-06-27 21:54:27,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:27,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73199489] [2024-06-27 21:54:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:27,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:27,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:27,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73199489] [2024-06-27 21:54:27,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73199489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:27,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:27,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:27,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322417495] [2024-06-27 21:54:27,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:27,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:27,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:27,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:27,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:27,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:27,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 265 transitions, 3470 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:27,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:27,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:27,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:28,250 INFO L124 PetriNetUnfolderBase]: 3118/5524 cut-off events. [2024-06-27 21:54:28,251 INFO L125 PetriNetUnfolderBase]: For 105020/105048 co-relation queries the response was YES. [2024-06-27 21:54:28,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28983 conditions, 5524 events. 3118/5524 cut-off events. For 105020/105048 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 38910 event pairs, 1062 based on Foata normal form. 10/5492 useless extension candidates. Maximal degree in co-relation 28893. Up to 4293 conditions per place. [2024-06-27 21:54:28,296 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 243 selfloop transitions, 32 changer transitions 0/296 dead transitions. [2024-06-27 21:54:28,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 296 transitions, 4132 flow [2024-06-27 21:54:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:28,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 21:54:28,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:54:28,297 INFO L175 Difference]: Start difference. First operand has 205 places, 265 transitions, 3470 flow. Second operand 6 states and 177 transitions. [2024-06-27 21:54:28,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 296 transitions, 4132 flow [2024-06-27 21:54:28,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 296 transitions, 4054 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:28,493 INFO L231 Difference]: Finished difference. Result has 206 places, 265 transitions, 3460 flow [2024-06-27 21:54:28,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3460, PETRI_PLACES=206, PETRI_TRANSITIONS=265} [2024-06-27 21:54:28,494 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 157 predicate places. [2024-06-27 21:54:28,494 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 265 transitions, 3460 flow [2024-06-27 21:54:28,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:28,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:28,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:28,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:54:28,495 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:28,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:28,495 INFO L85 PathProgramCache]: Analyzing trace with hash -656261954, now seen corresponding path program 1 times [2024-06-27 21:54:28,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:28,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019847631] [2024-06-27 21:54:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:28,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:28,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:28,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019847631] [2024-06-27 21:54:28,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019847631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:28,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:28,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:28,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111051199] [2024-06-27 21:54:28,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:28,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:28,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:28,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:28,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:28,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:28,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 265 transitions, 3460 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:28,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:28,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:28,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:29,220 INFO L124 PetriNetUnfolderBase]: 3039/5080 cut-off events. [2024-06-27 21:54:29,220 INFO L125 PetriNetUnfolderBase]: For 98321/98398 co-relation queries the response was YES. [2024-06-27 21:54:29,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27541 conditions, 5080 events. 3039/5080 cut-off events. For 98321/98398 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 33811 event pairs, 631 based on Foata normal form. 30/4961 useless extension candidates. Maximal degree in co-relation 27450. Up to 4102 conditions per place. [2024-06-27 21:54:29,262 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 241 selfloop transitions, 34 changer transitions 0/296 dead transitions. [2024-06-27 21:54:29,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 296 transitions, 4128 flow [2024-06-27 21:54:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 21:54:29,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-27 21:54:29,263 INFO L175 Difference]: Start difference. First operand has 206 places, 265 transitions, 3460 flow. Second operand 6 states and 178 transitions. [2024-06-27 21:54:29,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 296 transitions, 4128 flow [2024-06-27 21:54:29,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 296 transitions, 4039 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:29,494 INFO L231 Difference]: Finished difference. Result has 207 places, 265 transitions, 3443 flow [2024-06-27 21:54:29,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3443, PETRI_PLACES=207, PETRI_TRANSITIONS=265} [2024-06-27 21:54:29,494 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 158 predicate places. [2024-06-27 21:54:29,494 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 265 transitions, 3443 flow [2024-06-27 21:54:29,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:29,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:29,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:29,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:54:29,494 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:29,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash -598575398, now seen corresponding path program 1 times [2024-06-27 21:54:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403081417] [2024-06-27 21:54:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:29,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:29,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403081417] [2024-06-27 21:54:29,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403081417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:29,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:29,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:29,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688089803] [2024-06-27 21:54:29,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:29,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:54:29,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:29,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:54:29,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:54:29,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 45 [2024-06-27 21:54:29,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 265 transitions, 3443 flow. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:29,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:29,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 45 [2024-06-27 21:54:29,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:30,280 INFO L124 PetriNetUnfolderBase]: 3058/5719 cut-off events. [2024-06-27 21:54:30,281 INFO L125 PetriNetUnfolderBase]: For 70649/71063 co-relation queries the response was YES. [2024-06-27 21:54:30,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26955 conditions, 5719 events. 3058/5719 cut-off events. For 70649/71063 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 45050 event pairs, 1023 based on Foata normal form. 239/5517 useless extension candidates. Maximal degree in co-relation 26863. Up to 2929 conditions per place. [2024-06-27 21:54:30,327 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 99 selfloop transitions, 16 changer transitions 174/439 dead transitions. [2024-06-27 21:54:30,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 439 transitions, 5857 flow [2024-06-27 21:54:30,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:30,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 21:54:30,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793650793650794 [2024-06-27 21:54:30,327 INFO L175 Difference]: Start difference. First operand has 207 places, 265 transitions, 3443 flow. Second operand 7 states and 214 transitions. [2024-06-27 21:54:30,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 439 transitions, 5857 flow [2024-06-27 21:54:30,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 439 transitions, 5750 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:30,532 INFO L231 Difference]: Finished difference. Result has 213 places, 256 transitions, 3230 flow [2024-06-27 21:54:30,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3346, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3230, PETRI_PLACES=213, PETRI_TRANSITIONS=256} [2024-06-27 21:54:30,533 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 164 predicate places. [2024-06-27 21:54:30,533 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 256 transitions, 3230 flow [2024-06-27 21:54:30,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:30,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:30,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:30,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:54:30,533 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:30,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:30,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1771288381, now seen corresponding path program 1 times [2024-06-27 21:54:30,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:30,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178038905] [2024-06-27 21:54:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:30,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:30,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:30,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178038905] [2024-06-27 21:54:30,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178038905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:30,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:30,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:54:30,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914465571] [2024-06-27 21:54:30,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:30,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:54:30,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:30,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:54:30,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:54:30,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:30,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 256 transitions, 3230 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:30,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:30,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:30,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:31,420 INFO L124 PetriNetUnfolderBase]: 3274/5605 cut-off events. [2024-06-27 21:54:31,421 INFO L125 PetriNetUnfolderBase]: For 97007/97007 co-relation queries the response was YES. [2024-06-27 21:54:31,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30161 conditions, 5605 events. 3274/5605 cut-off events. For 97007/97007 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 37953 event pairs, 883 based on Foata normal form. 1/5602 useless extension candidates. Maximal degree in co-relation 30064. Up to 4735 conditions per place. [2024-06-27 21:54:31,467 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 250 selfloop transitions, 37 changer transitions 0/299 dead transitions. [2024-06-27 21:54:31,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 299 transitions, 4006 flow [2024-06-27 21:54:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 21:54:31,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 21:54:31,468 INFO L175 Difference]: Start difference. First operand has 213 places, 256 transitions, 3230 flow. Second operand 7 states and 198 transitions. [2024-06-27 21:54:31,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 299 transitions, 4006 flow [2024-06-27 21:54:31,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 299 transitions, 3938 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:54:31,757 INFO L231 Difference]: Finished difference. Result has 210 places, 260 transitions, 3331 flow [2024-06-27 21:54:31,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3182, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3331, PETRI_PLACES=210, PETRI_TRANSITIONS=260} [2024-06-27 21:54:31,757 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 161 predicate places. [2024-06-27 21:54:31,757 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 260 transitions, 3331 flow [2024-06-27 21:54:31,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:31,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:31,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:31,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:54:31,758 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:31,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:31,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1290181817, now seen corresponding path program 2 times [2024-06-27 21:54:31,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:31,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328993192] [2024-06-27 21:54:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:31,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:31,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:31,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328993192] [2024-06-27 21:54:31,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328993192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:31,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:31,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:54:31,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449570787] [2024-06-27 21:54:31,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:31,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:54:31,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:54:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:54:31,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:31,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 260 transitions, 3331 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:31,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:31,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:31,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:32,636 INFO L124 PetriNetUnfolderBase]: 3310/5755 cut-off events. [2024-06-27 21:54:32,637 INFO L125 PetriNetUnfolderBase]: For 104198/104202 co-relation queries the response was YES. [2024-06-27 21:54:32,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30660 conditions, 5755 events. 3310/5755 cut-off events. For 104198/104202 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 39532 event pairs, 1005 based on Foata normal form. 1/5749 useless extension candidates. Maximal degree in co-relation 30566. Up to 4583 conditions per place. [2024-06-27 21:54:32,684 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 210 selfloop transitions, 90 changer transitions 0/312 dead transitions. [2024-06-27 21:54:32,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 312 transitions, 4487 flow [2024-06-27 21:54:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 21:54:32,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-27 21:54:32,685 INFO L175 Difference]: Start difference. First operand has 210 places, 260 transitions, 3331 flow. Second operand 7 states and 201 transitions. [2024-06-27 21:54:32,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 312 transitions, 4487 flow [2024-06-27 21:54:32,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 312 transitions, 4366 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:32,944 INFO L231 Difference]: Finished difference. Result has 212 places, 272 transitions, 3618 flow [2024-06-27 21:54:32,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3618, PETRI_PLACES=212, PETRI_TRANSITIONS=272} [2024-06-27 21:54:32,944 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 163 predicate places. [2024-06-27 21:54:32,944 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 272 transitions, 3618 flow [2024-06-27 21:54:32,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:32,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:32,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:32,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:54:32,945 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:32,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:32,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1289913047, now seen corresponding path program 3 times [2024-06-27 21:54:32,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:32,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314067042] [2024-06-27 21:54:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:32,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:33,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:33,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314067042] [2024-06-27 21:54:33,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314067042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:33,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:33,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:54:33,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162158017] [2024-06-27 21:54:33,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:33,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:54:33,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:33,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:54:33,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:54:33,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:33,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 272 transitions, 3618 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:33,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:33,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:33,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:33,919 INFO L124 PetriNetUnfolderBase]: 3324/5778 cut-off events. [2024-06-27 21:54:33,919 INFO L125 PetriNetUnfolderBase]: For 111059/111063 co-relation queries the response was YES. [2024-06-27 21:54:33,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31500 conditions, 5778 events. 3324/5778 cut-off events. For 111059/111063 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 39736 event pairs, 996 based on Foata normal form. 1/5772 useless extension candidates. Maximal degree in co-relation 31405. Up to 4598 conditions per place. [2024-06-27 21:54:33,958 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 209 selfloop transitions, 91 changer transitions 0/312 dead transitions. [2024-06-27 21:54:33,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 312 transitions, 4614 flow [2024-06-27 21:54:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 21:54:33,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 21:54:33,959 INFO L175 Difference]: Start difference. First operand has 212 places, 272 transitions, 3618 flow. Second operand 7 states and 198 transitions. [2024-06-27 21:54:33,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 312 transitions, 4614 flow [2024-06-27 21:54:34,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 312 transitions, 4497 flow, removed 51 selfloop flow, removed 1 redundant places. [2024-06-27 21:54:34,236 INFO L231 Difference]: Finished difference. Result has 218 places, 275 transitions, 3749 flow [2024-06-27 21:54:34,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3749, PETRI_PLACES=218, PETRI_TRANSITIONS=275} [2024-06-27 21:54:34,236 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 169 predicate places. [2024-06-27 21:54:34,236 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 275 transitions, 3749 flow [2024-06-27 21:54:34,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:34,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:34,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:34,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:54:34,237 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:34,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:34,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1165367447, now seen corresponding path program 4 times [2024-06-27 21:54:34,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:34,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316420815] [2024-06-27 21:54:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:34,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:34,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:34,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316420815] [2024-06-27 21:54:34,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316420815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:34,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:34,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:54:34,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013428208] [2024-06-27 21:54:34,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:34,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:54:34,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:34,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:54:34,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:54:34,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:34,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 275 transitions, 3749 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:34,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:34,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:34,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:35,160 INFO L124 PetriNetUnfolderBase]: 3338/5736 cut-off events. [2024-06-27 21:54:35,160 INFO L125 PetriNetUnfolderBase]: For 114398/114398 co-relation queries the response was YES. [2024-06-27 21:54:35,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31818 conditions, 5736 events. 3338/5736 cut-off events. For 114398/114398 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 39091 event pairs, 918 based on Foata normal form. 1/5733 useless extension candidates. Maximal degree in co-relation 31721. Up to 4836 conditions per place. [2024-06-27 21:54:35,211 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 264 selfloop transitions, 33 changer transitions 0/309 dead transitions. [2024-06-27 21:54:35,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 309 transitions, 4503 flow [2024-06-27 21:54:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 21:54:35,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-27 21:54:35,212 INFO L175 Difference]: Start difference. First operand has 218 places, 275 transitions, 3749 flow. Second operand 7 states and 190 transitions. [2024-06-27 21:54:35,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 309 transitions, 4503 flow [2024-06-27 21:54:35,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 309 transitions, 4352 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:35,561 INFO L231 Difference]: Finished difference. Result has 222 places, 279 transitions, 3735 flow [2024-06-27 21:54:35,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3601, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3735, PETRI_PLACES=222, PETRI_TRANSITIONS=279} [2024-06-27 21:54:35,562 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 173 predicate places. [2024-06-27 21:54:35,562 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 279 transitions, 3735 flow [2024-06-27 21:54:35,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:35,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:35,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:35,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:54:35,562 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:35,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:35,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1948663995, now seen corresponding path program 1 times [2024-06-27 21:54:35,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:35,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949688300] [2024-06-27 21:54:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:35,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:35,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:35,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949688300] [2024-06-27 21:54:35,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949688300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:35,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:35,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:35,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089916596] [2024-06-27 21:54:35,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:35,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:35,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:35,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:35,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:35,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:35,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 279 transitions, 3735 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:35,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:35,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:35,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:36,462 INFO L124 PetriNetUnfolderBase]: 3123/5394 cut-off events. [2024-06-27 21:54:36,462 INFO L125 PetriNetUnfolderBase]: For 119156/119271 co-relation queries the response was YES. [2024-06-27 21:54:36,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29889 conditions, 5394 events. 3123/5394 cut-off events. For 119156/119271 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 37209 event pairs, 854 based on Foata normal form. 33/5274 useless extension candidates. Maximal degree in co-relation 29792. Up to 4350 conditions per place. [2024-06-27 21:54:36,516 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 236 selfloop transitions, 60 changer transitions 0/319 dead transitions. [2024-06-27 21:54:36,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 319 transitions, 4575 flow [2024-06-27 21:54:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 21:54:36,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 21:54:36,518 INFO L175 Difference]: Start difference. First operand has 222 places, 279 transitions, 3735 flow. Second operand 7 states and 205 transitions. [2024-06-27 21:54:36,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 319 transitions, 4575 flow [2024-06-27 21:54:36,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 319 transitions, 4488 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:36,899 INFO L231 Difference]: Finished difference. Result has 225 places, 283 transitions, 3841 flow [2024-06-27 21:54:36,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3841, PETRI_PLACES=225, PETRI_TRANSITIONS=283} [2024-06-27 21:54:36,900 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 176 predicate places. [2024-06-27 21:54:36,900 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 283 transitions, 3841 flow [2024-06-27 21:54:36,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:36,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:36,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:36,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:54:36,901 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:36,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:36,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1280651673, now seen corresponding path program 2 times [2024-06-27 21:54:36,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:36,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650295947] [2024-06-27 21:54:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:36,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:37,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:37,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650295947] [2024-06-27 21:54:37,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650295947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:37,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:37,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:37,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671591946] [2024-06-27 21:54:37,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:37,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:37,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:37,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:37,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:37,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:37,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 283 transitions, 3841 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:37,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:37,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:37,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:37,755 INFO L124 PetriNetUnfolderBase]: 3147/5346 cut-off events. [2024-06-27 21:54:37,755 INFO L125 PetriNetUnfolderBase]: For 122619/122743 co-relation queries the response was YES. [2024-06-27 21:54:37,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30381 conditions, 5346 events. 3147/5346 cut-off events. For 122619/122743 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 36225 event pairs, 789 based on Foata normal form. 41/5247 useless extension candidates. Maximal degree in co-relation 30283. Up to 4437 conditions per place. [2024-06-27 21:54:37,802 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 236 selfloop transitions, 57 changer transitions 0/316 dead transitions. [2024-06-27 21:54:37,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 316 transitions, 4535 flow [2024-06-27 21:54:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 21:54:37,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 21:54:37,803 INFO L175 Difference]: Start difference. First operand has 225 places, 283 transitions, 3841 flow. Second operand 7 states and 200 transitions. [2024-06-27 21:54:37,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 316 transitions, 4535 flow [2024-06-27 21:54:38,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 316 transitions, 4422 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:38,121 INFO L231 Difference]: Finished difference. Result has 229 places, 285 transitions, 3887 flow [2024-06-27 21:54:38,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3742, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3887, PETRI_PLACES=229, PETRI_TRANSITIONS=285} [2024-06-27 21:54:38,121 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 180 predicate places. [2024-06-27 21:54:38,122 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 285 transitions, 3887 flow [2024-06-27 21:54:38,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:38,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:38,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:38,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:54:38,122 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:38,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash -999721369, now seen corresponding path program 3 times [2024-06-27 21:54:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:38,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949388286] [2024-06-27 21:54:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:38,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:38,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:38,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949388286] [2024-06-27 21:54:38,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949388286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:38,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:38,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:38,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275214689] [2024-06-27 21:54:38,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:38,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:38,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:38,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:38,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:38,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:38,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 285 transitions, 3887 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:38,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:38,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:38,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:39,027 INFO L124 PetriNetUnfolderBase]: 3215/5356 cut-off events. [2024-06-27 21:54:39,027 INFO L125 PetriNetUnfolderBase]: For 124263/124394 co-relation queries the response was YES. [2024-06-27 21:54:39,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30929 conditions, 5356 events. 3215/5356 cut-off events. For 124263/124394 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 35877 event pairs, 722 based on Foata normal form. 44/5239 useless extension candidates. Maximal degree in co-relation 30829. Up to 4488 conditions per place. [2024-06-27 21:54:39,066 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 260 selfloop transitions, 36 changer transitions 0/319 dead transitions. [2024-06-27 21:54:39,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 319 transitions, 4624 flow [2024-06-27 21:54:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 21:54:39,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 21:54:39,067 INFO L175 Difference]: Start difference. First operand has 229 places, 285 transitions, 3887 flow. Second operand 7 states and 200 transitions. [2024-06-27 21:54:39,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 319 transitions, 4624 flow [2024-06-27 21:54:39,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 319 transitions, 4505 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:39,491 INFO L231 Difference]: Finished difference. Result has 231 places, 288 transitions, 3894 flow [2024-06-27 21:54:39,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3894, PETRI_PLACES=231, PETRI_TRANSITIONS=288} [2024-06-27 21:54:39,492 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 182 predicate places. [2024-06-27 21:54:39,492 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 288 transitions, 3894 flow [2024-06-27 21:54:39,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:39,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:39,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:39,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:54:39,493 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:39,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:39,493 INFO L85 PathProgramCache]: Analyzing trace with hash -628480613, now seen corresponding path program 5 times [2024-06-27 21:54:39,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:39,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872649075] [2024-06-27 21:54:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:39,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:39,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:39,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872649075] [2024-06-27 21:54:39,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872649075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:39,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:39,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:54:39,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106098970] [2024-06-27 21:54:39,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:39,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:54:39,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:54:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:54:39,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:39,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 288 transitions, 3894 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:39,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:39,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:39,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:40,448 INFO L124 PetriNetUnfolderBase]: 3531/5853 cut-off events. [2024-06-27 21:54:40,448 INFO L125 PetriNetUnfolderBase]: For 132392/132392 co-relation queries the response was YES. [2024-06-27 21:54:40,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34067 conditions, 5853 events. 3531/5853 cut-off events. For 132392/132392 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 39304 event pairs, 751 based on Foata normal form. 1/5843 useless extension candidates. Maximal degree in co-relation 33965. Up to 4889 conditions per place. [2024-06-27 21:54:40,498 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 218 selfloop transitions, 98 changer transitions 0/328 dead transitions. [2024-06-27 21:54:40,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 328 transitions, 4944 flow [2024-06-27 21:54:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 21:54:40,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 21:54:40,499 INFO L175 Difference]: Start difference. First operand has 231 places, 288 transitions, 3894 flow. Second operand 7 states and 198 transitions. [2024-06-27 21:54:40,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 328 transitions, 4944 flow [2024-06-27 21:54:40,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 328 transitions, 4881 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:40,923 INFO L231 Difference]: Finished difference. Result has 234 places, 291 transitions, 4085 flow [2024-06-27 21:54:40,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3831, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4085, PETRI_PLACES=234, PETRI_TRANSITIONS=291} [2024-06-27 21:54:40,924 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 185 predicate places. [2024-06-27 21:54:40,924 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 291 transitions, 4085 flow [2024-06-27 21:54:40,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:40,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:40,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:40,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:54:40,924 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:40,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash -618957413, now seen corresponding path program 6 times [2024-06-27 21:54:40,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:40,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117672973] [2024-06-27 21:54:40,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:40,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:41,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117672973] [2024-06-27 21:54:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117672973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:41,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:41,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:54:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123933704] [2024-06-27 21:54:41,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:41,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:54:41,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:41,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:54:41,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:54:41,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:41,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 291 transitions, 4085 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:41,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:41,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:41,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:41,954 INFO L124 PetriNetUnfolderBase]: 3545/5877 cut-off events. [2024-06-27 21:54:41,954 INFO L125 PetriNetUnfolderBase]: For 137587/137587 co-relation queries the response was YES. [2024-06-27 21:54:41,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34541 conditions, 5877 events. 3545/5877 cut-off events. For 137587/137587 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39455 event pairs, 751 based on Foata normal form. 1/5867 useless extension candidates. Maximal degree in co-relation 34438. Up to 4904 conditions per place. [2024-06-27 21:54:41,999 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 218 selfloop transitions, 98 changer transitions 0/328 dead transitions. [2024-06-27 21:54:41,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 328 transitions, 5137 flow [2024-06-27 21:54:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-27 21:54:42,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 21:54:42,000 INFO L175 Difference]: Start difference. First operand has 234 places, 291 transitions, 4085 flow. Second operand 7 states and 196 transitions. [2024-06-27 21:54:42,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 328 transitions, 5137 flow [2024-06-27 21:54:42,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 328 transitions, 4856 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:42,385 INFO L231 Difference]: Finished difference. Result has 236 places, 294 transitions, 4064 flow [2024-06-27 21:54:42,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3826, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4064, PETRI_PLACES=236, PETRI_TRANSITIONS=294} [2024-06-27 21:54:42,385 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 187 predicate places. [2024-06-27 21:54:42,385 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 294 transitions, 4064 flow [2024-06-27 21:54:42,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:42,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:42,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:42,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:54:42,386 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:42,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:42,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1773262235, now seen corresponding path program 7 times [2024-06-27 21:54:42,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:42,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493868060] [2024-06-27 21:54:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:42,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:42,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:42,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493868060] [2024-06-27 21:54:42,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493868060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:42,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:42,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:54:42,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620523137] [2024-06-27 21:54:42,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:42,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:54:42,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:42,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:54:42,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:54:42,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:42,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 294 transitions, 4064 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:42,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:42,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:42,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:43,385 INFO L124 PetriNetUnfolderBase]: 3559/6168 cut-off events. [2024-06-27 21:54:43,385 INFO L125 PetriNetUnfolderBase]: For 141384/141384 co-relation queries the response was YES. [2024-06-27 21:54:43,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34848 conditions, 6168 events. 3559/6168 cut-off events. For 141384/141384 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 43063 event pairs, 1048 based on Foata normal form. 1/6158 useless extension candidates. Maximal degree in co-relation 34744. Up to 4919 conditions per place. [2024-06-27 21:54:43,443 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 212 selfloop transitions, 103 changer transitions 0/327 dead transitions. [2024-06-27 21:54:43,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 327 transitions, 4982 flow [2024-06-27 21:54:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 21:54:43,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063492063492063 [2024-06-27 21:54:43,444 INFO L175 Difference]: Start difference. First operand has 236 places, 294 transitions, 4064 flow. Second operand 7 states and 191 transitions. [2024-06-27 21:54:43,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 327 transitions, 4982 flow [2024-06-27 21:54:43,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 327 transitions, 4795 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:43,842 INFO L231 Difference]: Finished difference. Result has 239 places, 297 transitions, 4131 flow [2024-06-27 21:54:43,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3880, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4131, PETRI_PLACES=239, PETRI_TRANSITIONS=297} [2024-06-27 21:54:43,843 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 190 predicate places. [2024-06-27 21:54:43,843 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 297 transitions, 4131 flow [2024-06-27 21:54:43,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:43,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:43,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:43,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:54:43,844 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:43,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1166652483, now seen corresponding path program 8 times [2024-06-27 21:54:43,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:43,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299024589] [2024-06-27 21:54:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:43,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:44,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:44,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299024589] [2024-06-27 21:54:44,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299024589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:44,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:44,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:54:44,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553522354] [2024-06-27 21:54:44,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:44,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:54:44,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:44,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:54:44,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:54:44,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:44,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 297 transitions, 4131 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:44,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:44,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:44,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:44,934 INFO L124 PetriNetUnfolderBase]: 3566/6182 cut-off events. [2024-06-27 21:54:44,934 INFO L125 PetriNetUnfolderBase]: For 142417/142417 co-relation queries the response was YES. [2024-06-27 21:54:44,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34948 conditions, 6182 events. 3566/6182 cut-off events. For 142417/142417 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43080 event pairs, 1036 based on Foata normal form. 1/6180 useless extension candidates. Maximal degree in co-relation 34843. Up to 5046 conditions per place. [2024-06-27 21:54:44,986 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 273 selfloop transitions, 71 changer transitions 0/356 dead transitions. [2024-06-27 21:54:44,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 356 transitions, 5284 flow [2024-06-27 21:54:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:54:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:54:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 21:54:44,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 21:54:44,987 INFO L175 Difference]: Start difference. First operand has 239 places, 297 transitions, 4131 flow. Second operand 8 states and 230 transitions. [2024-06-27 21:54:44,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 356 transitions, 5284 flow [2024-06-27 21:54:45,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 356 transitions, 5111 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:45,508 INFO L231 Difference]: Finished difference. Result has 244 places, 311 transitions, 4377 flow [2024-06-27 21:54:45,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3976, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4377, PETRI_PLACES=244, PETRI_TRANSITIONS=311} [2024-06-27 21:54:45,509 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 195 predicate places. [2024-06-27 21:54:45,509 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 311 transitions, 4377 flow [2024-06-27 21:54:45,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:45,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:45,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:45,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:54:45,509 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:45,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:45,509 INFO L85 PathProgramCache]: Analyzing trace with hash 944636861, now seen corresponding path program 9 times [2024-06-27 21:54:45,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:45,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24179026] [2024-06-27 21:54:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:45,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:45,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:45,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24179026] [2024-06-27 21:54:45,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24179026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:45,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:45,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:54:45,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883900921] [2024-06-27 21:54:45,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:45,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:54:45,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:45,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:54:45,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:54:45,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 21:54:45,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 311 transitions, 4377 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:45,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:45,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 21:54:45,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:46,483 INFO L124 PetriNetUnfolderBase]: 3563/5913 cut-off events. [2024-06-27 21:54:46,483 INFO L125 PetriNetUnfolderBase]: For 147749/147749 co-relation queries the response was YES. [2024-06-27 21:54:46,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35158 conditions, 5913 events. 3563/5913 cut-off events. For 147749/147749 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39771 event pairs, 767 based on Foata normal form. 1/5903 useless extension candidates. Maximal degree in co-relation 35051. Up to 5043 conditions per place. [2024-06-27 21:54:46,535 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 259 selfloop transitions, 68 changer transitions 0/339 dead transitions. [2024-06-27 21:54:46,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 339 transitions, 5115 flow [2024-06-27 21:54:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 21:54:46,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-27 21:54:46,536 INFO L175 Difference]: Start difference. First operand has 244 places, 311 transitions, 4377 flow. Second operand 6 states and 173 transitions. [2024-06-27 21:54:46,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 339 transitions, 5115 flow [2024-06-27 21:54:46,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 339 transitions, 4927 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:46,943 INFO L231 Difference]: Finished difference. Result has 245 places, 311 transitions, 4336 flow [2024-06-27 21:54:46,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4189, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4336, PETRI_PLACES=245, PETRI_TRANSITIONS=311} [2024-06-27 21:54:46,943 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 196 predicate places. [2024-06-27 21:54:46,943 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 311 transitions, 4336 flow [2024-06-27 21:54:46,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:46,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:46,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:46,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:54:46,944 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:46,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:46,944 INFO L85 PathProgramCache]: Analyzing trace with hash 977232807, now seen corresponding path program 4 times [2024-06-27 21:54:46,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:46,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409441068] [2024-06-27 21:54:46,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:46,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:47,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:47,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409441068] [2024-06-27 21:54:47,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409441068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:47,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:47,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:47,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426222716] [2024-06-27 21:54:47,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:47,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:47,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:47,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:47,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:47,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:47,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 311 transitions, 4336 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:47,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:47,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:47,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:47,877 INFO L124 PetriNetUnfolderBase]: 3286/5647 cut-off events. [2024-06-27 21:54:47,877 INFO L125 PetriNetUnfolderBase]: For 151836/151969 co-relation queries the response was YES. [2024-06-27 21:54:47,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32502 conditions, 5647 events. 3286/5647 cut-off events. For 151836/151969 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39100 event pairs, 870 based on Foata normal form. 34/5497 useless extension candidates. Maximal degree in co-relation 32395. Up to 4577 conditions per place. [2024-06-27 21:54:47,930 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 263 selfloop transitions, 60 changer transitions 0/348 dead transitions. [2024-06-27 21:54:47,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 348 transitions, 5246 flow [2024-06-27 21:54:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 21:54:47,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 21:54:47,931 INFO L175 Difference]: Start difference. First operand has 245 places, 311 transitions, 4336 flow. Second operand 7 states and 202 transitions. [2024-06-27 21:54:47,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 348 transitions, 5246 flow [2024-06-27 21:54:48,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 348 transitions, 5063 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:48,372 INFO L231 Difference]: Finished difference. Result has 247 places, 315 transitions, 4356 flow [2024-06-27 21:54:48,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4155, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4356, PETRI_PLACES=247, PETRI_TRANSITIONS=315} [2024-06-27 21:54:48,372 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 198 predicate places. [2024-06-27 21:54:48,372 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 315 transitions, 4356 flow [2024-06-27 21:54:48,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:48,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:48,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:48,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:54:48,373 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:48,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:48,373 INFO L85 PathProgramCache]: Analyzing trace with hash -618950469, now seen corresponding path program 5 times [2024-06-27 21:54:48,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:48,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948219718] [2024-06-27 21:54:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:48,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:48,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:48,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948219718] [2024-06-27 21:54:48,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948219718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:48,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:48,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:48,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568319811] [2024-06-27 21:54:48,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:48,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:48,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:48,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:48,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:48,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:48,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 315 transitions, 4356 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:48,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:48,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:48,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:49,240 INFO L124 PetriNetUnfolderBase]: 3303/5685 cut-off events. [2024-06-27 21:54:49,240 INFO L125 PetriNetUnfolderBase]: For 152297/152430 co-relation queries the response was YES. [2024-06-27 21:54:49,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32748 conditions, 5685 events. 3303/5685 cut-off events. For 152297/152430 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39500 event pairs, 881 based on Foata normal form. 34/5538 useless extension candidates. Maximal degree in co-relation 32640. Up to 4653 conditions per place. [2024-06-27 21:54:49,292 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 263 selfloop transitions, 57 changer transitions 0/345 dead transitions. [2024-06-27 21:54:49,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 345 transitions, 5100 flow [2024-06-27 21:54:49,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 21:54:49,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253968253968254 [2024-06-27 21:54:49,293 INFO L175 Difference]: Start difference. First operand has 247 places, 315 transitions, 4356 flow. Second operand 7 states and 197 transitions. [2024-06-27 21:54:49,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 345 transitions, 5100 flow [2024-06-27 21:54:49,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 345 transitions, 4975 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:49,705 INFO L231 Difference]: Finished difference. Result has 251 places, 317 transitions, 4394 flow [2024-06-27 21:54:49,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4249, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4394, PETRI_PLACES=251, PETRI_TRANSITIONS=317} [2024-06-27 21:54:49,706 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 202 predicate places. [2024-06-27 21:54:49,706 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 317 transitions, 4394 flow [2024-06-27 21:54:49,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:49,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:49,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:49,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:54:49,706 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:49,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:49,706 INFO L85 PathProgramCache]: Analyzing trace with hash -975126341, now seen corresponding path program 6 times [2024-06-27 21:54:49,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:49,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794380918] [2024-06-27 21:54:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:49,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:49,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:49,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794380918] [2024-06-27 21:54:49,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794380918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:49,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:49,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:49,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735671004] [2024-06-27 21:54:49,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:49,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:49,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:49,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:49,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:49,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:49,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 317 transitions, 4394 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:49,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:49,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:49,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:50,669 INFO L124 PetriNetUnfolderBase]: 3354/5658 cut-off events. [2024-06-27 21:54:50,670 INFO L125 PetriNetUnfolderBase]: For 153844/153980 co-relation queries the response was YES. [2024-06-27 21:54:50,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33153 conditions, 5658 events. 3354/5658 cut-off events. For 153844/153980 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38744 event pairs, 670 based on Foata normal form. 33/5523 useless extension candidates. Maximal degree in co-relation 33043. Up to 4411 conditions per place. [2024-06-27 21:54:50,711 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 254 selfloop transitions, 79 changer transitions 0/358 dead transitions. [2024-06-27 21:54:50,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 358 transitions, 5480 flow [2024-06-27 21:54:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 21:54:50,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-27 21:54:50,712 INFO L175 Difference]: Start difference. First operand has 251 places, 317 transitions, 4394 flow. Second operand 7 states and 204 transitions. [2024-06-27 21:54:50,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 358 transitions, 5480 flow [2024-06-27 21:54:51,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 358 transitions, 5361 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:51,155 INFO L231 Difference]: Finished difference. Result has 254 places, 323 transitions, 4588 flow [2024-06-27 21:54:51,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4275, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4588, PETRI_PLACES=254, PETRI_TRANSITIONS=323} [2024-06-27 21:54:51,155 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 205 predicate places. [2024-06-27 21:54:51,155 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 323 transitions, 4588 flow [2024-06-27 21:54:51,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:51,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:51,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:51,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:54:51,156 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:51,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:51,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1207249707, now seen corresponding path program 7 times [2024-06-27 21:54:51,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:51,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204524281] [2024-06-27 21:54:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:51,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:51,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:51,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204524281] [2024-06-27 21:54:51,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204524281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:51,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:51,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:51,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090526861] [2024-06-27 21:54:51,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:51,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:51,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:51,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:51,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:51,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:51,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 323 transitions, 4588 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:51,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:51,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:51,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:52,061 INFO L124 PetriNetUnfolderBase]: 3340/5718 cut-off events. [2024-06-27 21:54:52,061 INFO L125 PetriNetUnfolderBase]: For 161624/161768 co-relation queries the response was YES. [2024-06-27 21:54:52,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33906 conditions, 5718 events. 3340/5718 cut-off events. For 161624/161768 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39811 event pairs, 745 based on Foata normal form. 34/5576 useless extension candidates. Maximal degree in co-relation 33794. Up to 4390 conditions per place. [2024-06-27 21:54:52,118 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 250 selfloop transitions, 81 changer transitions 0/356 dead transitions. [2024-06-27 21:54:52,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 356 transitions, 5484 flow [2024-06-27 21:54:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:52,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 21:54:52,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 21:54:52,119 INFO L175 Difference]: Start difference. First operand has 254 places, 323 transitions, 4588 flow. Second operand 7 states and 200 transitions. [2024-06-27 21:54:52,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 356 transitions, 5484 flow [2024-06-27 21:54:52,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 356 transitions, 5242 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:52,687 INFO L231 Difference]: Finished difference. Result has 257 places, 325 transitions, 4557 flow [2024-06-27 21:54:52,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4368, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4557, PETRI_PLACES=257, PETRI_TRANSITIONS=325} [2024-06-27 21:54:52,688 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 208 predicate places. [2024-06-27 21:54:52,688 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 325 transitions, 4557 flow [2024-06-27 21:54:52,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:52,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:52,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:52,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:54:52,688 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:52,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:52,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1279920989, now seen corresponding path program 8 times [2024-06-27 21:54:52,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:52,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918576530] [2024-06-27 21:54:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:52,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:52,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:52,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918576530] [2024-06-27 21:54:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918576530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:52,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:52,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:52,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908383450] [2024-06-27 21:54:52,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:52,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:52,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:52,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 325 transitions, 4557 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:52,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:52,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:52,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:53,605 INFO L124 PetriNetUnfolderBase]: 3433/5772 cut-off events. [2024-06-27 21:54:53,605 INFO L125 PetriNetUnfolderBase]: For 164888/165031 co-relation queries the response was YES. [2024-06-27 21:54:53,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34093 conditions, 5772 events. 3433/5772 cut-off events. For 164888/165031 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39583 event pairs, 816 based on Foata normal form. 31/5627 useless extension candidates. Maximal degree in co-relation 33981. Up to 4770 conditions per place. [2024-06-27 21:54:53,664 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 268 selfloop transitions, 63 changer transitions 0/356 dead transitions. [2024-06-27 21:54:53,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 356 transitions, 5461 flow [2024-06-27 21:54:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-27 21:54:53,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 21:54:53,665 INFO L175 Difference]: Start difference. First operand has 257 places, 325 transitions, 4557 flow. Second operand 7 states and 196 transitions. [2024-06-27 21:54:53,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 356 transitions, 5461 flow [2024-06-27 21:54:54,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 356 transitions, 5326 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:54,146 INFO L231 Difference]: Finished difference. Result has 261 places, 329 transitions, 4633 flow [2024-06-27 21:54:54,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4426, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4633, PETRI_PLACES=261, PETRI_TRANSITIONS=329} [2024-06-27 21:54:54,147 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 212 predicate places. [2024-06-27 21:54:54,147 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 329 transitions, 4633 flow [2024-06-27 21:54:54,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:54,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:54,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:54,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:54:54,147 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:54,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:54,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1271350109, now seen corresponding path program 9 times [2024-06-27 21:54:54,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:54,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436190793] [2024-06-27 21:54:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:54,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:54,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436190793] [2024-06-27 21:54:54,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436190793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:54,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:54,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:54,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74958324] [2024-06-27 21:54:54,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:54,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:54,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:54,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:54,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:54,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:54,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 329 transitions, 4633 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:54,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:54,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:54,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:55,067 INFO L124 PetriNetUnfolderBase]: 3415/5758 cut-off events. [2024-06-27 21:54:55,067 INFO L125 PetriNetUnfolderBase]: For 165429/165575 co-relation queries the response was YES. [2024-06-27 21:54:55,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33849 conditions, 5758 events. 3415/5758 cut-off events. For 165429/165575 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 39621 event pairs, 828 based on Foata normal form. 34/5613 useless extension candidates. Maximal degree in co-relation 33735. Up to 4810 conditions per place. [2024-06-27 21:54:55,125 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 273 selfloop transitions, 56 changer transitions 0/354 dead transitions. [2024-06-27 21:54:55,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 354 transitions, 5347 flow [2024-06-27 21:54:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 21:54:55,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158730158730159 [2024-06-27 21:54:55,126 INFO L175 Difference]: Start difference. First operand has 261 places, 329 transitions, 4633 flow. Second operand 7 states and 194 transitions. [2024-06-27 21:54:55,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 354 transitions, 5347 flow [2024-06-27 21:54:55,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 354 transitions, 5216 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:55,591 INFO L231 Difference]: Finished difference. Result has 264 places, 329 transitions, 4619 flow [2024-06-27 21:54:55,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4502, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4619, PETRI_PLACES=264, PETRI_TRANSITIONS=329} [2024-06-27 21:54:55,591 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 215 predicate places. [2024-06-27 21:54:55,591 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 329 transitions, 4619 flow [2024-06-27 21:54:55,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:55,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:55,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:55,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:54:55,592 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:55,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:55,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2040386219, now seen corresponding path program 10 times [2024-06-27 21:54:55,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:55,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027712843] [2024-06-27 21:54:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:55,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:55,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:55,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027712843] [2024-06-27 21:54:55,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027712843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:55,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:55,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:55,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128935756] [2024-06-27 21:54:55,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:55,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:55,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:55,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:55,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:55,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 329 transitions, 4619 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:55,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:55,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:55,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:56,560 INFO L124 PetriNetUnfolderBase]: 3415/5794 cut-off events. [2024-06-27 21:54:56,560 INFO L125 PetriNetUnfolderBase]: For 164317/164427 co-relation queries the response was YES. [2024-06-27 21:54:56,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33672 conditions, 5794 events. 3415/5794 cut-off events. For 164317/164427 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 40191 event pairs, 822 based on Foata normal form. 26/5669 useless extension candidates. Maximal degree in co-relation 33557. Up to 4418 conditions per place. [2024-06-27 21:54:56,618 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 271 selfloop transitions, 79 changer transitions 0/375 dead transitions. [2024-06-27 21:54:56,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 375 transitions, 5465 flow [2024-06-27 21:54:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:54:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:54:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 21:54:56,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638888888888889 [2024-06-27 21:54:56,619 INFO L175 Difference]: Start difference. First operand has 264 places, 329 transitions, 4619 flow. Second operand 8 states and 239 transitions. [2024-06-27 21:54:56,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 375 transitions, 5465 flow [2024-06-27 21:54:57,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 375 transitions, 5381 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:57,153 INFO L231 Difference]: Finished difference. Result has 268 places, 329 transitions, 4721 flow [2024-06-27 21:54:57,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4721, PETRI_PLACES=268, PETRI_TRANSITIONS=329} [2024-06-27 21:54:57,153 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 219 predicate places. [2024-06-27 21:54:57,153 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 329 transitions, 4721 flow [2024-06-27 21:54:57,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:57,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:57,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:57,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:54:57,154 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:57,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:57,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1763082407, now seen corresponding path program 11 times [2024-06-27 21:54:57,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:57,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017434434] [2024-06-27 21:54:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:57,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:57,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:57,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017434434] [2024-06-27 21:54:57,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017434434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:57,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:57,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:57,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019240648] [2024-06-27 21:54:57,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:57,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:57,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:57,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:57,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:57,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:57,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 329 transitions, 4721 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:57,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:57,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:57,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:58,127 INFO L124 PetriNetUnfolderBase]: 3410/5860 cut-off events. [2024-06-27 21:54:58,127 INFO L125 PetriNetUnfolderBase]: For 167320/167448 co-relation queries the response was YES. [2024-06-27 21:54:58,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34013 conditions, 5860 events. 3410/5860 cut-off events. For 167320/167448 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 41244 event pairs, 914 based on Foata normal form. 30/5730 useless extension candidates. Maximal degree in co-relation 33897. Up to 4740 conditions per place. [2024-06-27 21:54:58,183 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 260 selfloop transitions, 72 changer transitions 0/357 dead transitions. [2024-06-27 21:54:58,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 357 transitions, 5451 flow [2024-06-27 21:54:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 21:54:58,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 21:54:58,184 INFO L175 Difference]: Start difference. First operand has 268 places, 329 transitions, 4721 flow. Second operand 6 states and 179 transitions. [2024-06-27 21:54:58,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 357 transitions, 5451 flow [2024-06-27 21:54:58,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 357 transitions, 5186 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 21:54:58,691 INFO L231 Difference]: Finished difference. Result has 265 places, 329 transitions, 4609 flow [2024-06-27 21:54:58,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4609, PETRI_PLACES=265, PETRI_TRANSITIONS=329} [2024-06-27 21:54:58,692 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 216 predicate places. [2024-06-27 21:54:58,692 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 329 transitions, 4609 flow [2024-06-27 21:54:58,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:58,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:58,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:54:58,692 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:54:58,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash 953214685, now seen corresponding path program 12 times [2024-06-27 21:54:58,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:58,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312582923] [2024-06-27 21:54:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:58,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:58,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:58,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312582923] [2024-06-27 21:54:58,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312582923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:58,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:58,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:58,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885725452] [2024-06-27 21:54:58,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:58,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:58,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:58,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:58,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:58,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:54:58,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 329 transitions, 4609 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:58,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:54:58,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:59,631 INFO L124 PetriNetUnfolderBase]: 3371/5681 cut-off events. [2024-06-27 21:54:59,632 INFO L125 PetriNetUnfolderBase]: For 160566/160719 co-relation queries the response was YES. [2024-06-27 21:54:59,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33292 conditions, 5681 events. 3371/5681 cut-off events. For 160566/160719 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39057 event pairs, 619 based on Foata normal form. 33/5523 useless extension candidates. Maximal degree in co-relation 33176. Up to 4217 conditions per place. [2024-06-27 21:54:59,688 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 250 selfloop transitions, 86 changer transitions 0/361 dead transitions. [2024-06-27 21:54:59,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 361 transitions, 5393 flow [2024-06-27 21:54:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 21:54:59,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 21:54:59,689 INFO L175 Difference]: Start difference. First operand has 265 places, 329 transitions, 4609 flow. Second operand 6 states and 183 transitions. [2024-06-27 21:54:59,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 361 transitions, 5393 flow [2024-06-27 21:55:00,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 361 transitions, 5229 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:55:00,241 INFO L231 Difference]: Finished difference. Result has 266 places, 329 transitions, 4625 flow [2024-06-27 21:55:00,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4445, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4625, PETRI_PLACES=266, PETRI_TRANSITIONS=329} [2024-06-27 21:55:00,242 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 217 predicate places. [2024-06-27 21:55:00,242 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 329 transitions, 4625 flow [2024-06-27 21:55:00,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:00,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:00,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:55:00,242 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:00,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1724666865, now seen corresponding path program 1 times [2024-06-27 21:55:00,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:00,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457916136] [2024-06-27 21:55:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:00,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:00,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457916136] [2024-06-27 21:55:00,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457916136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:00,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:00,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:00,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501952564] [2024-06-27 21:55:00,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:00,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:00,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:00,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:00,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 329 transitions, 4625 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:00,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:00,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:01,312 INFO L124 PetriNetUnfolderBase]: 3393/5997 cut-off events. [2024-06-27 21:55:01,313 INFO L125 PetriNetUnfolderBase]: For 164329/164423 co-relation queries the response was YES. [2024-06-27 21:55:01,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34317 conditions, 5997 events. 3393/5997 cut-off events. For 164329/164423 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 42833 event pairs, 1119 based on Foata normal form. 11/5903 useless extension candidates. Maximal degree in co-relation 34201. Up to 4700 conditions per place. [2024-06-27 21:55:01,366 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 272 selfloop transitions, 75 changer transitions 0/372 dead transitions. [2024-06-27 21:55:01,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 372 transitions, 5599 flow [2024-06-27 21:55:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 21:55:01,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 21:55:01,367 INFO L175 Difference]: Start difference. First operand has 266 places, 329 transitions, 4625 flow. Second operand 8 states and 234 transitions. [2024-06-27 21:55:01,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 372 transitions, 5599 flow [2024-06-27 21:55:01,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 372 transitions, 5457 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:55:01,937 INFO L231 Difference]: Finished difference. Result has 270 places, 332 transitions, 4702 flow [2024-06-27 21:55:01,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4483, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4702, PETRI_PLACES=270, PETRI_TRANSITIONS=332} [2024-06-27 21:55:01,938 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 221 predicate places. [2024-06-27 21:55:01,938 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 332 transitions, 4702 flow [2024-06-27 21:55:01,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:01,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:01,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:01,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:55:01,938 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:01,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:01,938 INFO L85 PathProgramCache]: Analyzing trace with hash 257485169, now seen corresponding path program 2 times [2024-06-27 21:55:01,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:01,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121841615] [2024-06-27 21:55:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:01,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:02,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:02,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121841615] [2024-06-27 21:55:02,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121841615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:02,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:02,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:02,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435375818] [2024-06-27 21:55:02,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:02,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:02,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:02,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 332 transitions, 4702 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:02,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:02,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:02,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:02,889 INFO L124 PetriNetUnfolderBase]: 3502/5980 cut-off events. [2024-06-27 21:55:02,889 INFO L125 PetriNetUnfolderBase]: For 172851/172938 co-relation queries the response was YES. [2024-06-27 21:55:02,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35472 conditions, 5980 events. 3502/5980 cut-off events. For 172851/172938 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 41605 event pairs, 868 based on Foata normal form. 25/5888 useless extension candidates. Maximal degree in co-relation 35355. Up to 4440 conditions per place. [2024-06-27 21:55:02,951 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 185 selfloop transitions, 170 changer transitions 0/380 dead transitions. [2024-06-27 21:55:02,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 380 transitions, 6084 flow [2024-06-27 21:55:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:02,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 21:55:02,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 21:55:02,952 INFO L175 Difference]: Start difference. First operand has 270 places, 332 transitions, 4702 flow. Second operand 8 states and 237 transitions. [2024-06-27 21:55:02,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 380 transitions, 6084 flow [2024-06-27 21:55:03,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 380 transitions, 5740 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 21:55:03,539 INFO L231 Difference]: Finished difference. Result has 271 places, 341 transitions, 4896 flow [2024-06-27 21:55:03,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4896, PETRI_PLACES=271, PETRI_TRANSITIONS=341} [2024-06-27 21:55:03,540 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 222 predicate places. [2024-06-27 21:55:03,540 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 341 transitions, 4896 flow [2024-06-27 21:55:03,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:03,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:03,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:03,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:55:03,540 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:03,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:03,540 INFO L85 PathProgramCache]: Analyzing trace with hash 367750035, now seen corresponding path program 3 times [2024-06-27 21:55:03,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:03,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046167391] [2024-06-27 21:55:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:03,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:03,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:03,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046167391] [2024-06-27 21:55:03,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046167391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:03,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:03,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:03,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018086935] [2024-06-27 21:55:03,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:03,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:03,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:03,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:03,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:03,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:03,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 341 transitions, 4896 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:03,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:03,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:03,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:04,580 INFO L124 PetriNetUnfolderBase]: 3531/6026 cut-off events. [2024-06-27 21:55:04,580 INFO L125 PetriNetUnfolderBase]: For 184394/184495 co-relation queries the response was YES. [2024-06-27 21:55:04,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36592 conditions, 6026 events. 3531/6026 cut-off events. For 184394/184495 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42008 event pairs, 869 based on Foata normal form. 27/5933 useless extension candidates. Maximal degree in co-relation 36476. Up to 4471 conditions per place. [2024-06-27 21:55:04,634 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 186 selfloop transitions, 172 changer transitions 0/383 dead transitions. [2024-06-27 21:55:04,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 383 transitions, 6232 flow [2024-06-27 21:55:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 21:55:04,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 21:55:04,635 INFO L175 Difference]: Start difference. First operand has 271 places, 341 transitions, 4896 flow. Second operand 8 states and 234 transitions. [2024-06-27 21:55:04,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 383 transitions, 6232 flow [2024-06-27 21:55:05,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 383 transitions, 5886 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-27 21:55:05,265 INFO L231 Difference]: Finished difference. Result has 275 places, 347 transitions, 5036 flow [2024-06-27 21:55:05,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5036, PETRI_PLACES=275, PETRI_TRANSITIONS=347} [2024-06-27 21:55:05,266 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 226 predicate places. [2024-06-27 21:55:05,266 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 347 transitions, 5036 flow [2024-06-27 21:55:05,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:05,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:05,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:05,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:55:05,266 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:05,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:05,266 INFO L85 PathProgramCache]: Analyzing trace with hash 367393845, now seen corresponding path program 4 times [2024-06-27 21:55:05,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:05,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139460165] [2024-06-27 21:55:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:05,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:05,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:05,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139460165] [2024-06-27 21:55:05,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139460165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:05,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:05,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:05,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100661042] [2024-06-27 21:55:05,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:05,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:05,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:05,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:05,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:05,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:05,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 347 transitions, 5036 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:05,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:05,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:05,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:06,223 INFO L124 PetriNetUnfolderBase]: 3499/5808 cut-off events. [2024-06-27 21:55:06,224 INFO L125 PetriNetUnfolderBase]: For 173222/173360 co-relation queries the response was YES. [2024-06-27 21:55:06,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35026 conditions, 5808 events. 3499/5808 cut-off events. For 173222/173360 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39287 event pairs, 737 based on Foata normal form. 50/5695 useless extension candidates. Maximal degree in co-relation 34909. Up to 4415 conditions per place. [2024-06-27 21:55:06,283 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 188 selfloop transitions, 169 changer transitions 0/382 dead transitions. [2024-06-27 21:55:06,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 382 transitions, 6102 flow [2024-06-27 21:55:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 21:55:06,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 21:55:06,284 INFO L175 Difference]: Start difference. First operand has 275 places, 347 transitions, 5036 flow. Second operand 8 states and 234 transitions. [2024-06-27 21:55:06,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 382 transitions, 6102 flow [2024-06-27 21:55:06,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 382 transitions, 5817 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 21:55:06,971 INFO L231 Difference]: Finished difference. Result has 279 places, 347 transitions, 5095 flow [2024-06-27 21:55:06,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4751, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5095, PETRI_PLACES=279, PETRI_TRANSITIONS=347} [2024-06-27 21:55:06,972 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 230 predicate places. [2024-06-27 21:55:06,972 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 347 transitions, 5095 flow [2024-06-27 21:55:06,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:06,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:06,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:06,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:55:06,973 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:06,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash -926448793, now seen corresponding path program 5 times [2024-06-27 21:55:06,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:06,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260403233] [2024-06-27 21:55:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:06,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:07,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:07,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260403233] [2024-06-27 21:55:07,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260403233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:07,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:07,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:07,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719181130] [2024-06-27 21:55:07,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:07,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:07,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:07,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:07,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:07,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:07,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 347 transitions, 5095 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:07,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:07,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:07,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:08,086 INFO L124 PetriNetUnfolderBase]: 3559/6087 cut-off events. [2024-06-27 21:55:08,086 INFO L125 PetriNetUnfolderBase]: For 186732/186861 co-relation queries the response was YES. [2024-06-27 21:55:08,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36016 conditions, 6087 events. 3559/6087 cut-off events. For 186732/186861 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 42655 event pairs, 875 based on Foata normal form. 25/5976 useless extension candidates. Maximal degree in co-relation 35898. Up to 4940 conditions per place. [2024-06-27 21:55:08,135 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 297 selfloop transitions, 70 changer transitions 0/392 dead transitions. [2024-06-27 21:55:08,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 392 transitions, 6379 flow [2024-06-27 21:55:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 21:55:08,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 21:55:08,136 INFO L175 Difference]: Start difference. First operand has 279 places, 347 transitions, 5095 flow. Second operand 8 states and 228 transitions. [2024-06-27 21:55:08,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 392 transitions, 6379 flow [2024-06-27 21:55:08,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 392 transitions, 6000 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:55:08,853 INFO L231 Difference]: Finished difference. Result has 281 places, 359 transitions, 5093 flow [2024-06-27 21:55:08,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4738, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5093, PETRI_PLACES=281, PETRI_TRANSITIONS=359} [2024-06-27 21:55:08,854 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 232 predicate places. [2024-06-27 21:55:08,854 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 359 transitions, 5093 flow [2024-06-27 21:55:08,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:08,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:08,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:55:08,854 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:08,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:08,854 INFO L85 PathProgramCache]: Analyzing trace with hash 486298677, now seen corresponding path program 6 times [2024-06-27 21:55:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:08,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869272480] [2024-06-27 21:55:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:08,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:08,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:08,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869272480] [2024-06-27 21:55:08,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869272480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:08,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:08,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378880209] [2024-06-27 21:55:08,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:08,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:08,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:08,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:08,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:08,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 359 transitions, 5093 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:08,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:08,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:08,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:09,814 INFO L124 PetriNetUnfolderBase]: 3524/5871 cut-off events. [2024-06-27 21:55:09,814 INFO L125 PetriNetUnfolderBase]: For 183298/183460 co-relation queries the response was YES. [2024-06-27 21:55:09,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35144 conditions, 5871 events. 3524/5871 cut-off events. For 183298/183460 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 40008 event pairs, 747 based on Foata normal form. 35/5727 useless extension candidates. Maximal degree in co-relation 35024. Up to 4881 conditions per place. [2024-06-27 21:55:09,875 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 297 selfloop transitions, 69 changer transitions 0/391 dead transitions. [2024-06-27 21:55:09,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 391 transitions, 6046 flow [2024-06-27 21:55:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 21:55:09,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-27 21:55:09,876 INFO L175 Difference]: Start difference. First operand has 281 places, 359 transitions, 5093 flow. Second operand 8 states and 227 transitions. [2024-06-27 21:55:09,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 391 transitions, 6046 flow [2024-06-27 21:55:10,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 391 transitions, 5959 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 21:55:10,616 INFO L231 Difference]: Finished difference. Result has 286 places, 359 transitions, 5151 flow [2024-06-27 21:55:10,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5151, PETRI_PLACES=286, PETRI_TRANSITIONS=359} [2024-06-27 21:55:10,616 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 237 predicate places. [2024-06-27 21:55:10,616 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 359 transitions, 5151 flow [2024-06-27 21:55:10,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:10,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:10,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:10,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:55:10,617 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:10,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:10,617 INFO L85 PathProgramCache]: Analyzing trace with hash -471969719, now seen corresponding path program 7 times [2024-06-27 21:55:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:10,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992774354] [2024-06-27 21:55:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:10,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:10,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:10,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992774354] [2024-06-27 21:55:10,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992774354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:10,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:10,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:10,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106820268] [2024-06-27 21:55:10,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:10,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:10,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:10,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:10,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 359 transitions, 5151 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:10,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:10,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:10,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:11,705 INFO L124 PetriNetUnfolderBase]: 3521/5867 cut-off events. [2024-06-27 21:55:11,705 INFO L125 PetriNetUnfolderBase]: For 184453/184613 co-relation queries the response was YES. [2024-06-27 21:55:11,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35280 conditions, 5867 events. 3521/5867 cut-off events. For 184453/184613 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 40015 event pairs, 746 based on Foata normal form. 37/5726 useless extension candidates. Maximal degree in co-relation 35158. Up to 4878 conditions per place. [2024-06-27 21:55:11,761 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 299 selfloop transitions, 72 changer transitions 0/396 dead transitions. [2024-06-27 21:55:11,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 396 transitions, 5984 flow [2024-06-27 21:55:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:55:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:55:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-06-27 21:55:11,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6088888888888889 [2024-06-27 21:55:11,762 INFO L175 Difference]: Start difference. First operand has 286 places, 359 transitions, 5151 flow. Second operand 10 states and 274 transitions. [2024-06-27 21:55:11,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 396 transitions, 5984 flow [2024-06-27 21:55:12,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 396 transitions, 5840 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:12,595 INFO L231 Difference]: Finished difference. Result has 290 places, 359 transitions, 5157 flow [2024-06-27 21:55:12,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5007, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5157, PETRI_PLACES=290, PETRI_TRANSITIONS=359} [2024-06-27 21:55:12,595 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 241 predicate places. [2024-06-27 21:55:12,596 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 359 transitions, 5157 flow [2024-06-27 21:55:12,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:12,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:12,596 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] [2024-06-27 21:55:12,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:55:12,596 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:12,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:12,596 INFO L85 PathProgramCache]: Analyzing trace with hash 92512947, now seen corresponding path program 1 times [2024-06-27 21:55:12,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:12,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222053746] [2024-06-27 21:55:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:12,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:12,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222053746] [2024-06-27 21:55:12,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222053746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:12,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:12,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:12,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211434287] [2024-06-27 21:55:12,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:12,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:12,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:12,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:12,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:12,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 359 transitions, 5157 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:12,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:12,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:12,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:13,737 INFO L124 PetriNetUnfolderBase]: 3719/6264 cut-off events. [2024-06-27 21:55:13,737 INFO L125 PetriNetUnfolderBase]: For 204709/204881 co-relation queries the response was YES. [2024-06-27 21:55:13,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36917 conditions, 6264 events. 3719/6264 cut-off events. For 204709/204881 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 43690 event pairs, 751 based on Foata normal form. 37/6113 useless extension candidates. Maximal degree in co-relation 36794. Up to 4827 conditions per place. [2024-06-27 21:55:13,806 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 340 selfloop transitions, 46 changer transitions 0/411 dead transitions. [2024-06-27 21:55:13,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 411 transitions, 6277 flow [2024-06-27 21:55:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 21:55:13,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 21:55:13,807 INFO L175 Difference]: Start difference. First operand has 290 places, 359 transitions, 5157 flow. Second operand 8 states and 237 transitions. [2024-06-27 21:55:13,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 411 transitions, 6277 flow [2024-06-27 21:55:14,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 411 transitions, 6123 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:55:14,533 INFO L231 Difference]: Finished difference. Result has 291 places, 363 transitions, 5174 flow [2024-06-27 21:55:14,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5003, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5174, PETRI_PLACES=291, PETRI_TRANSITIONS=363} [2024-06-27 21:55:14,533 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 242 predicate places. [2024-06-27 21:55:14,533 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 363 transitions, 5174 flow [2024-06-27 21:55:14,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:14,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:14,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:14,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:55:14,534 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:14,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:14,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1542005113, now seen corresponding path program 2 times [2024-06-27 21:55:14,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:14,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181511403] [2024-06-27 21:55:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:14,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:14,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:14,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181511403] [2024-06-27 21:55:14,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181511403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:14,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:14,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:14,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760290216] [2024-06-27 21:55:14,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:14,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:14,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:14,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:14,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:14,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:14,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 363 transitions, 5174 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:14,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:14,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:14,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:15,618 INFO L124 PetriNetUnfolderBase]: 3879/6494 cut-off events. [2024-06-27 21:55:15,618 INFO L125 PetriNetUnfolderBase]: For 212441/212625 co-relation queries the response was YES. [2024-06-27 21:55:15,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38791 conditions, 6494 events. 3879/6494 cut-off events. For 212441/212625 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 45430 event pairs, 876 based on Foata normal form. 38/6332 useless extension candidates. Maximal degree in co-relation 38666. Up to 5338 conditions per place. [2024-06-27 21:55:15,688 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 344 selfloop transitions, 47 changer transitions 0/416 dead transitions. [2024-06-27 21:55:15,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 416 transitions, 6274 flow [2024-06-27 21:55:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 21:55:15,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-06-27 21:55:15,689 INFO L175 Difference]: Start difference. First operand has 291 places, 363 transitions, 5174 flow. Second operand 8 states and 233 transitions. [2024-06-27 21:55:15,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 416 transitions, 6274 flow [2024-06-27 21:55:16,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 416 transitions, 6150 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:55:16,506 INFO L231 Difference]: Finished difference. Result has 295 places, 372 transitions, 5330 flow [2024-06-27 21:55:16,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5063, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5330, PETRI_PLACES=295, PETRI_TRANSITIONS=372} [2024-06-27 21:55:16,506 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 246 predicate places. [2024-06-27 21:55:16,506 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 372 transitions, 5330 flow [2024-06-27 21:55:16,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:16,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:16,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:16,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:55:16,506 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:16,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:16,507 INFO L85 PathProgramCache]: Analyzing trace with hash 338596821, now seen corresponding path program 3 times [2024-06-27 21:55:16,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:16,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245515439] [2024-06-27 21:55:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:16,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:16,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:16,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245515439] [2024-06-27 21:55:16,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245515439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:16,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:16,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:16,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130083656] [2024-06-27 21:55:16,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:16,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:16,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:16,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:16,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:16,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:16,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 372 transitions, 5330 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:16,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:16,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:16,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:17,607 INFO L124 PetriNetUnfolderBase]: 3940/6558 cut-off events. [2024-06-27 21:55:17,607 INFO L125 PetriNetUnfolderBase]: For 216598/216781 co-relation queries the response was YES. [2024-06-27 21:55:17,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39059 conditions, 6558 events. 3940/6558 cut-off events. For 216598/216781 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 45710 event pairs, 832 based on Foata normal form. 38/6398 useless extension candidates. Maximal degree in co-relation 38933. Up to 5429 conditions per place. [2024-06-27 21:55:17,679 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 344 selfloop transitions, 45 changer transitions 0/414 dead transitions. [2024-06-27 21:55:17,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 414 transitions, 6300 flow [2024-06-27 21:55:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 21:55:17,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 21:55:17,679 INFO L175 Difference]: Start difference. First operand has 295 places, 372 transitions, 5330 flow. Second operand 8 states and 228 transitions. [2024-06-27 21:55:17,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 414 transitions, 6300 flow [2024-06-27 21:55:18,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 414 transitions, 6200 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:55:18,538 INFO L231 Difference]: Finished difference. Result has 301 places, 376 transitions, 5408 flow [2024-06-27 21:55:18,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5232, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5408, PETRI_PLACES=301, PETRI_TRANSITIONS=376} [2024-06-27 21:55:18,538 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 252 predicate places. [2024-06-27 21:55:18,538 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 376 transitions, 5408 flow [2024-06-27 21:55:18,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:18,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:18,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:18,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:55:18,539 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:18,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:18,539 INFO L85 PathProgramCache]: Analyzing trace with hash 279043349, now seen corresponding path program 1 times [2024-06-27 21:55:18,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:18,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485341764] [2024-06-27 21:55:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:18,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:18,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485341764] [2024-06-27 21:55:18,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485341764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:18,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:18,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:18,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841615133] [2024-06-27 21:55:18,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:18,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:18,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:18,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:18,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 376 transitions, 5408 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:18,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:18,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:18,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:19,695 INFO L124 PetriNetUnfolderBase]: 4107/6846 cut-off events. [2024-06-27 21:55:19,695 INFO L125 PetriNetUnfolderBase]: For 245730/245900 co-relation queries the response was YES. [2024-06-27 21:55:19,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41196 conditions, 6846 events. 4107/6846 cut-off events. For 245730/245900 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 48191 event pairs, 935 based on Foata normal form. 46/6694 useless extension candidates. Maximal degree in co-relation 41067. Up to 5355 conditions per place. [2024-06-27 21:55:19,773 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 291 selfloop transitions, 107 changer transitions 0/423 dead transitions. [2024-06-27 21:55:19,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 423 transitions, 6534 flow [2024-06-27 21:55:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 21:55:19,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:55:19,774 INFO L175 Difference]: Start difference. First operand has 301 places, 376 transitions, 5408 flow. Second operand 8 states and 236 transitions. [2024-06-27 21:55:19,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 423 transitions, 6534 flow [2024-06-27 21:55:20,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 423 transitions, 6441 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 21:55:20,799 INFO L231 Difference]: Finished difference. Result has 306 places, 378 transitions, 5567 flow [2024-06-27 21:55:20,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5567, PETRI_PLACES=306, PETRI_TRANSITIONS=378} [2024-06-27 21:55:20,799 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 257 predicate places. [2024-06-27 21:55:20,800 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 378 transitions, 5567 flow [2024-06-27 21:55:20,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:20,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:20,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:20,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:55:20,800 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:20,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1132186361, now seen corresponding path program 2 times [2024-06-27 21:55:20,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:20,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728280993] [2024-06-27 21:55:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:20,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:20,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:20,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728280993] [2024-06-27 21:55:20,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728280993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:20,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:20,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:20,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651050356] [2024-06-27 21:55:20,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:20,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:20,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:20,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:20,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:20,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 378 transitions, 5567 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:20,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:20,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:20,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:22,030 INFO L124 PetriNetUnfolderBase]: 4255/7229 cut-off events. [2024-06-27 21:55:22,030 INFO L125 PetriNetUnfolderBase]: For 280666/280838 co-relation queries the response was YES. [2024-06-27 21:55:22,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43605 conditions, 7229 events. 4255/7229 cut-off events. For 280666/280838 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 52184 event pairs, 1081 based on Foata normal form. 48/7079 useless extension candidates. Maximal degree in co-relation 43475. Up to 5721 conditions per place. [2024-06-27 21:55:22,112 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 293 selfloop transitions, 103 changer transitions 0/421 dead transitions. [2024-06-27 21:55:22,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 421 transitions, 6685 flow [2024-06-27 21:55:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 21:55:22,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-06-27 21:55:22,113 INFO L175 Difference]: Start difference. First operand has 306 places, 378 transitions, 5567 flow. Second operand 8 states and 233 transitions. [2024-06-27 21:55:22,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 421 transitions, 6685 flow [2024-06-27 21:55:23,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 421 transitions, 6555 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:55:23,319 INFO L231 Difference]: Finished difference. Result has 310 places, 380 transitions, 5685 flow [2024-06-27 21:55:23,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5437, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5685, PETRI_PLACES=310, PETRI_TRANSITIONS=380} [2024-06-27 21:55:23,320 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 261 predicate places. [2024-06-27 21:55:23,320 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 380 transitions, 5685 flow [2024-06-27 21:55:23,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:23,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:23,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:23,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:55:23,320 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:23,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:23,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1045346681, now seen corresponding path program 3 times [2024-06-27 21:55:23,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:23,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191737299] [2024-06-27 21:55:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:23,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:23,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:23,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191737299] [2024-06-27 21:55:23,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191737299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:23,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:23,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:23,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108392094] [2024-06-27 21:55:23,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:23,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:23,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:23,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:23,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:23,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:23,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 380 transitions, 5685 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:23,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:23,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:23,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:24,572 INFO L124 PetriNetUnfolderBase]: 4237/7214 cut-off events. [2024-06-27 21:55:24,572 INFO L125 PetriNetUnfolderBase]: For 268959/269131 co-relation queries the response was YES. [2024-06-27 21:55:24,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43244 conditions, 7214 events. 4237/7214 cut-off events. For 268959/269131 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52155 event pairs, 1094 based on Foata normal form. 50/7066 useless extension candidates. Maximal degree in co-relation 43112. Up to 5792 conditions per place. [2024-06-27 21:55:24,651 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 291 selfloop transitions, 101 changer transitions 0/417 dead transitions. [2024-06-27 21:55:24,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 417 transitions, 6587 flow [2024-06-27 21:55:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 21:55:24,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6361111111111111 [2024-06-27 21:55:24,652 INFO L175 Difference]: Start difference. First operand has 310 places, 380 transitions, 5685 flow. Second operand 8 states and 229 transitions. [2024-06-27 21:55:24,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 417 transitions, 6587 flow [2024-06-27 21:55:25,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 417 transitions, 6452 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 21:55:25,619 INFO L231 Difference]: Finished difference. Result has 314 places, 380 transitions, 5757 flow [2024-06-27 21:55:25,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5757, PETRI_PLACES=314, PETRI_TRANSITIONS=380} [2024-06-27 21:55:25,620 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 265 predicate places. [2024-06-27 21:55:25,620 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 380 transitions, 5757 flow [2024-06-27 21:55:25,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:25,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:25,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:25,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:55:25,620 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:25,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1766287707, now seen corresponding path program 4 times [2024-06-27 21:55:25,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:25,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694820185] [2024-06-27 21:55:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:25,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:25,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:25,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694820185] [2024-06-27 21:55:25,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694820185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:25,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:25,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:25,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489142677] [2024-06-27 21:55:25,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:25,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:25,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:25,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:25,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:25,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:25,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 380 transitions, 5757 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:25,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:25,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:25,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:26,937 INFO L124 PetriNetUnfolderBase]: 4489/7504 cut-off events. [2024-06-27 21:55:26,938 INFO L125 PetriNetUnfolderBase]: For 351911/352122 co-relation queries the response was YES. [2024-06-27 21:55:26,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45487 conditions, 7504 events. 4489/7504 cut-off events. For 351911/352122 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 53671 event pairs, 1069 based on Foata normal form. 82/7371 useless extension candidates. Maximal degree in co-relation 45353. Up to 5924 conditions per place. [2024-06-27 21:55:27,023 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 328 selfloop transitions, 64 changer transitions 0/417 dead transitions. [2024-06-27 21:55:27,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 417 transitions, 6691 flow [2024-06-27 21:55:27,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 21:55:27,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 21:55:27,024 INFO L175 Difference]: Start difference. First operand has 314 places, 380 transitions, 5757 flow. Second operand 8 states and 230 transitions. [2024-06-27 21:55:27,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 417 transitions, 6691 flow [2024-06-27 21:55:27,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 417 transitions, 6484 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:55:27,961 INFO L231 Difference]: Finished difference. Result has 315 places, 381 transitions, 5708 flow [2024-06-27 21:55:27,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5708, PETRI_PLACES=315, PETRI_TRANSITIONS=381} [2024-06-27 21:55:27,962 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 266 predicate places. [2024-06-27 21:55:27,962 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 381 transitions, 5708 flow [2024-06-27 21:55:27,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:27,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:27,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:27,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:55:27,962 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:27,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash -353331917, now seen corresponding path program 5 times [2024-06-27 21:55:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:27,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521696296] [2024-06-27 21:55:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:27,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:28,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:28,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521696296] [2024-06-27 21:55:28,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521696296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:28,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:28,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:28,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920074672] [2024-06-27 21:55:28,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:28,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:28,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:28,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:28,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 381 transitions, 5708 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:28,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:28,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:28,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:29,450 INFO L124 PetriNetUnfolderBase]: 5110/8711 cut-off events. [2024-06-27 21:55:29,451 INFO L125 PetriNetUnfolderBase]: For 463997/464180 co-relation queries the response was YES. [2024-06-27 21:55:29,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53637 conditions, 8711 events. 5110/8711 cut-off events. For 463997/464180 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 65165 event pairs, 1375 based on Foata normal form. 63/8593 useless extension candidates. Maximal degree in co-relation 53502. Up to 5872 conditions per place. [2024-06-27 21:55:29,558 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 336 selfloop transitions, 65 changer transitions 0/426 dead transitions. [2024-06-27 21:55:29,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 426 transitions, 6906 flow [2024-06-27 21:55:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:29,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 21:55:29,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-06-27 21:55:29,559 INFO L175 Difference]: Start difference. First operand has 315 places, 381 transitions, 5708 flow. Second operand 8 states and 235 transitions. [2024-06-27 21:55:29,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 426 transitions, 6906 flow [2024-06-27 21:55:31,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 426 transitions, 6774 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:31,024 INFO L231 Difference]: Finished difference. Result has 317 places, 383 transitions, 5757 flow [2024-06-27 21:55:31,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5576, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5757, PETRI_PLACES=317, PETRI_TRANSITIONS=383} [2024-06-27 21:55:31,024 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 268 predicate places. [2024-06-27 21:55:31,025 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 383 transitions, 5757 flow [2024-06-27 21:55:31,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:31,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:31,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:31,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:55:31,025 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:31,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:31,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1855788497, now seen corresponding path program 6 times [2024-06-27 21:55:31,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:31,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871680809] [2024-06-27 21:55:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:31,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:31,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:31,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871680809] [2024-06-27 21:55:31,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871680809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:31,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:31,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:31,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553870747] [2024-06-27 21:55:31,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:31,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:31,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:31,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:31,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:31,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:31,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 383 transitions, 5757 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:31,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:31,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:31,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:32,492 INFO L124 PetriNetUnfolderBase]: 5025/8392 cut-off events. [2024-06-27 21:55:32,492 INFO L125 PetriNetUnfolderBase]: For 379001/379248 co-relation queries the response was YES. [2024-06-27 21:55:32,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50118 conditions, 8392 events. 5025/8392 cut-off events. For 379001/379248 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 61400 event pairs, 1326 based on Foata normal form. 85/8207 useless extension candidates. Maximal degree in co-relation 49982. Up to 6760 conditions per place. [2024-06-27 21:55:32,587 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 334 selfloop transitions, 66 changer transitions 0/425 dead transitions. [2024-06-27 21:55:32,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 425 transitions, 6699 flow [2024-06-27 21:55:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:55:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:55:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2024-06-27 21:55:32,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177777777777778 [2024-06-27 21:55:32,588 INFO L175 Difference]: Start difference. First operand has 317 places, 383 transitions, 5757 flow. Second operand 10 states and 278 transitions. [2024-06-27 21:55:32,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 425 transitions, 6699 flow [2024-06-27 21:55:33,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 425 transitions, 6609 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:55:33,776 INFO L231 Difference]: Finished difference. Result has 323 places, 383 transitions, 5807 flow [2024-06-27 21:55:33,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5667, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5807, PETRI_PLACES=323, PETRI_TRANSITIONS=383} [2024-06-27 21:55:33,776 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 274 predicate places. [2024-06-27 21:55:33,776 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 383 transitions, 5807 flow [2024-06-27 21:55:33,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:33,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:33,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:33,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:55:33,777 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:33,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:33,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1782673955, now seen corresponding path program 1 times [2024-06-27 21:55:33,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:33,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790833635] [2024-06-27 21:55:33,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:33,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:33,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:33,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790833635] [2024-06-27 21:55:33,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790833635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:33,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:33,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:33,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966318314] [2024-06-27 21:55:33,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:33,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:33,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:33,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:33,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:33,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:33,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 383 transitions, 5807 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:33,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:33,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:33,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:35,414 INFO L124 PetriNetUnfolderBase]: 5264/8786 cut-off events. [2024-06-27 21:55:35,414 INFO L125 PetriNetUnfolderBase]: For 374067/374338 co-relation queries the response was YES. [2024-06-27 21:55:35,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52144 conditions, 8786 events. 5264/8786 cut-off events. For 374067/374338 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 64632 event pairs, 1314 based on Foata normal form. 87/8606 useless extension candidates. Maximal degree in co-relation 52006. Up to 6113 conditions per place. [2024-06-27 21:55:35,513 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 337 selfloop transitions, 72 changer transitions 0/434 dead transitions. [2024-06-27 21:55:35,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 434 transitions, 6879 flow [2024-06-27 21:55:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:55:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:55:35,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 282 transitions. [2024-06-27 21:55:35,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-27 21:55:35,514 INFO L175 Difference]: Start difference. First operand has 323 places, 383 transitions, 5807 flow. Second operand 10 states and 282 transitions. [2024-06-27 21:55:35,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 434 transitions, 6879 flow [2024-06-27 21:55:36,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 434 transitions, 6743 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:55:36,675 INFO L231 Difference]: Finished difference. Result has 326 places, 386 transitions, 5896 flow [2024-06-27 21:55:36,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5671, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5896, PETRI_PLACES=326, PETRI_TRANSITIONS=386} [2024-06-27 21:55:36,675 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 277 predicate places. [2024-06-27 21:55:36,675 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 386 transitions, 5896 flow [2024-06-27 21:55:36,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:36,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:36,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:36,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:55:36,676 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:36,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1991939125, now seen corresponding path program 8 times [2024-06-27 21:55:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:36,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677415704] [2024-06-27 21:55:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:36,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:36,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677415704] [2024-06-27 21:55:36,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677415704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:36,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:36,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:36,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854742016] [2024-06-27 21:55:36,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:36,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:36,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:36,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:36,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 386 transitions, 5896 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:36,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:36,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:36,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:38,157 INFO L124 PetriNetUnfolderBase]: 5265/8788 cut-off events. [2024-06-27 21:55:38,158 INFO L125 PetriNetUnfolderBase]: For 291398/291621 co-relation queries the response was YES. [2024-06-27 21:55:38,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52715 conditions, 8788 events. 5265/8788 cut-off events. For 291398/291621 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 65078 event pairs, 1449 based on Foata normal form. 50/8585 useless extension candidates. Maximal degree in co-relation 52575. Up to 7076 conditions per place. [2024-06-27 21:55:38,265 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 205 selfloop transitions, 194 changer transitions 0/424 dead transitions. [2024-06-27 21:55:38,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 424 transitions, 7160 flow [2024-06-27 21:55:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 21:55:38,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-06-27 21:55:38,266 INFO L175 Difference]: Start difference. First operand has 326 places, 386 transitions, 5896 flow. Second operand 8 states and 233 transitions. [2024-06-27 21:55:38,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 424 transitions, 7160 flow [2024-06-27 21:55:39,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 424 transitions, 7070 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:55:39,803 INFO L231 Difference]: Finished difference. Result has 329 places, 389 transitions, 6258 flow [2024-06-27 21:55:39,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5806, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6258, PETRI_PLACES=329, PETRI_TRANSITIONS=389} [2024-06-27 21:55:39,804 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 280 predicate places. [2024-06-27 21:55:39,804 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 389 transitions, 6258 flow [2024-06-27 21:55:39,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:39,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:39,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:39,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:55:39,805 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:39,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash -387074767, now seen corresponding path program 9 times [2024-06-27 21:55:39,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:39,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206557697] [2024-06-27 21:55:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:39,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:39,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:39,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206557697] [2024-06-27 21:55:39,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206557697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:39,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:39,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:39,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723000842] [2024-06-27 21:55:39,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:39,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:39,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:39,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:39,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 389 transitions, 6258 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:39,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:39,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:39,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:41,277 INFO L124 PetriNetUnfolderBase]: 5288/8974 cut-off events. [2024-06-27 21:55:41,277 INFO L125 PetriNetUnfolderBase]: For 307465/307764 co-relation queries the response was YES. [2024-06-27 21:55:41,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54012 conditions, 8974 events. 5288/8974 cut-off events. For 307465/307764 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 67669 event pairs, 1607 based on Foata normal form. 76/8742 useless extension candidates. Maximal degree in co-relation 53870. Up to 7085 conditions per place. [2024-06-27 21:55:41,381 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 210 selfloop transitions, 193 changer transitions 0/428 dead transitions. [2024-06-27 21:55:41,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 428 transitions, 7764 flow [2024-06-27 21:55:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 21:55:41,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 21:55:41,382 INFO L175 Difference]: Start difference. First operand has 329 places, 389 transitions, 6258 flow. Second operand 8 states and 232 transitions. [2024-06-27 21:55:41,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 428 transitions, 7764 flow [2024-06-27 21:55:42,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 428 transitions, 7227 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:42,832 INFO L231 Difference]: Finished difference. Result has 331 places, 395 transitions, 6241 flow [2024-06-27 21:55:42,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5769, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6241, PETRI_PLACES=331, PETRI_TRANSITIONS=395} [2024-06-27 21:55:42,833 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 282 predicate places. [2024-06-27 21:55:42,833 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 395 transitions, 6241 flow [2024-06-27 21:55:42,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:42,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:42,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:42,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:55:42,833 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:42,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash -387430957, now seen corresponding path program 10 times [2024-06-27 21:55:42,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:42,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890232307] [2024-06-27 21:55:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:42,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:42,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:42,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890232307] [2024-06-27 21:55:42,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890232307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:42,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:42,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:42,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468939092] [2024-06-27 21:55:42,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:42,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:42,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:42,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:42,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:42,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:42,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 395 transitions, 6241 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:42,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:42,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:42,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:44,318 INFO L124 PetriNetUnfolderBase]: 5291/8836 cut-off events. [2024-06-27 21:55:44,318 INFO L125 PetriNetUnfolderBase]: For 301645/301864 co-relation queries the response was YES. [2024-06-27 21:55:44,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53620 conditions, 8836 events. 5291/8836 cut-off events. For 301645/301864 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 65597 event pairs, 1453 based on Foata normal form. 46/8627 useless extension candidates. Maximal degree in co-relation 53477. Up to 7104 conditions per place. [2024-06-27 21:55:44,413 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 210 selfloop transitions, 192 changer transitions 0/427 dead transitions. [2024-06-27 21:55:44,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 427 transitions, 7453 flow [2024-06-27 21:55:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 21:55:44,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 21:55:44,414 INFO L175 Difference]: Start difference. First operand has 331 places, 395 transitions, 6241 flow. Second operand 8 states and 232 transitions. [2024-06-27 21:55:44,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 427 transitions, 7453 flow [2024-06-27 21:55:45,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 427 transitions, 7081 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 21:55:45,773 INFO L231 Difference]: Finished difference. Result has 335 places, 395 transitions, 6259 flow [2024-06-27 21:55:45,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6259, PETRI_PLACES=335, PETRI_TRANSITIONS=395} [2024-06-27 21:55:45,773 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 286 predicate places. [2024-06-27 21:55:45,773 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 395 transitions, 6259 flow [2024-06-27 21:55:45,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:45,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:45,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:45,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:55:45,774 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:45,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:45,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1156787599, now seen corresponding path program 11 times [2024-06-27 21:55:45,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:45,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758588848] [2024-06-27 21:55:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:45,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:45,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:45,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758588848] [2024-06-27 21:55:45,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758588848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:45,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:45,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:45,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901420018] [2024-06-27 21:55:45,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:45,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:45,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:45,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:45,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:45,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:45,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 395 transitions, 6259 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:45,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:45,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:45,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:47,271 INFO L124 PetriNetUnfolderBase]: 5304/8983 cut-off events. [2024-06-27 21:55:47,271 INFO L125 PetriNetUnfolderBase]: For 309231/309506 co-relation queries the response was YES. [2024-06-27 21:55:47,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53838 conditions, 8983 events. 5304/8983 cut-off events. For 309231/309506 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 67500 event pairs, 1694 based on Foata normal form. 28/8692 useless extension candidates. Maximal degree in co-relation 53694. Up to 7721 conditions per place. [2024-06-27 21:55:47,375 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 364 selfloop transitions, 36 changer transitions 0/425 dead transitions. [2024-06-27 21:55:47,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 425 transitions, 7168 flow [2024-06-27 21:55:47,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 21:55:47,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-27 21:55:47,376 INFO L175 Difference]: Start difference. First operand has 335 places, 395 transitions, 6259 flow. Second operand 8 states and 217 transitions. [2024-06-27 21:55:47,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 425 transitions, 7168 flow [2024-06-27 21:55:49,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 425 transitions, 6770 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:55:49,015 INFO L231 Difference]: Finished difference. Result has 336 places, 398 transitions, 5994 flow [2024-06-27 21:55:49,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5867, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5994, PETRI_PLACES=336, PETRI_TRANSITIONS=398} [2024-06-27 21:55:49,016 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 287 predicate places. [2024-06-27 21:55:49,016 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 398 transitions, 5994 flow [2024-06-27 21:55:49,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:49,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:49,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:49,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:55:49,016 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:49,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash -817299983, now seen corresponding path program 12 times [2024-06-27 21:55:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:49,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202389073] [2024-06-27 21:55:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:49,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:49,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:49,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202389073] [2024-06-27 21:55:49,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202389073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:49,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:49,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:49,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262250733] [2024-06-27 21:55:49,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:49,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:49,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:49,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:49,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 398 transitions, 5994 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:49,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:49,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:49,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:50,521 INFO L124 PetriNetUnfolderBase]: 5332/9046 cut-off events. [2024-06-27 21:55:50,522 INFO L125 PetriNetUnfolderBase]: For 317095/317412 co-relation queries the response was YES. [2024-06-27 21:55:50,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53661 conditions, 9046 events. 5332/9046 cut-off events. For 317095/317412 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 68143 event pairs, 1614 based on Foata normal form. 76/8809 useless extension candidates. Maximal degree in co-relation 53516. Up to 7132 conditions per place. [2024-06-27 21:55:50,627 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 207 selfloop transitions, 201 changer transitions 0/433 dead transitions. [2024-06-27 21:55:50,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 433 transitions, 7316 flow [2024-06-27 21:55:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 21:55:50,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6361111111111111 [2024-06-27 21:55:50,628 INFO L175 Difference]: Start difference. First operand has 336 places, 398 transitions, 5994 flow. Second operand 8 states and 229 transitions. [2024-06-27 21:55:50,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 433 transitions, 7316 flow [2024-06-27 21:55:52,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 433 transitions, 7228 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:52,312 INFO L231 Difference]: Finished difference. Result has 338 places, 404 transitions, 6412 flow [2024-06-27 21:55:52,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5906, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6412, PETRI_PLACES=338, PETRI_TRANSITIONS=404} [2024-06-27 21:55:52,313 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 289 predicate places. [2024-06-27 21:55:52,313 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 404 transitions, 6412 flow [2024-06-27 21:55:52,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:52,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:52,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:52,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:55:52,314 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:52,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:52,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1507950887, now seen corresponding path program 13 times [2024-06-27 21:55:52,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:52,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153126027] [2024-06-27 21:55:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:52,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:52,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153126027] [2024-06-27 21:55:52,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153126027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:52,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:52,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:52,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615604134] [2024-06-27 21:55:52,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:52,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:52,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:52,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:52,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:52,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:52,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 404 transitions, 6412 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:52,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:52,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:52,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:54,012 INFO L124 PetriNetUnfolderBase]: 5329/9045 cut-off events. [2024-06-27 21:55:54,012 INFO L125 PetriNetUnfolderBase]: For 323048/323369 co-relation queries the response was YES. [2024-06-27 21:55:54,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54319 conditions, 9045 events. 5329/9045 cut-off events. For 323048/323369 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 68191 event pairs, 1615 based on Foata normal form. 78/8810 useless extension candidates. Maximal degree in co-relation 54173. Up to 7129 conditions per place. [2024-06-27 21:55:54,119 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 205 selfloop transitions, 202 changer transitions 0/432 dead transitions. [2024-06-27 21:55:54,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 432 transitions, 7462 flow [2024-06-27 21:55:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 21:55:54,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-27 21:55:54,122 INFO L175 Difference]: Start difference. First operand has 338 places, 404 transitions, 6412 flow. Second operand 8 states and 227 transitions. [2024-06-27 21:55:54,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 432 transitions, 7462 flow [2024-06-27 21:55:55,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 432 transitions, 7141 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:55:55,860 INFO L231 Difference]: Finished difference. Result has 342 places, 404 transitions, 6501 flow [2024-06-27 21:55:55,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6091, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6501, PETRI_PLACES=342, PETRI_TRANSITIONS=404} [2024-06-27 21:55:55,861 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 293 predicate places. [2024-06-27 21:55:55,861 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 404 transitions, 6501 flow [2024-06-27 21:55:55,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:55,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:55,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:55,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:55:55,861 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:55,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:55,861 INFO L85 PathProgramCache]: Analyzing trace with hash -781016503, now seen corresponding path program 14 times [2024-06-27 21:55:55,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:55,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329168714] [2024-06-27 21:55:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:55,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:55,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:55,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329168714] [2024-06-27 21:55:55,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329168714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:55,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:55,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:55,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048362916] [2024-06-27 21:55:55,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:55,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:55,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:55,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:55,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:55,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:55,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 404 transitions, 6501 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:55,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:55,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:55,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:57,390 INFO L124 PetriNetUnfolderBase]: 5357/8944 cut-off events. [2024-06-27 21:55:57,390 INFO L125 PetriNetUnfolderBase]: For 331546/331766 co-relation queries the response was YES. [2024-06-27 21:55:57,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54653 conditions, 8944 events. 5357/8944 cut-off events. For 331546/331766 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 66343 event pairs, 1471 based on Foata normal form. 20/8700 useless extension candidates. Maximal degree in co-relation 54506. Up to 7367 conditions per place. [2024-06-27 21:55:57,496 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 260 selfloop transitions, 155 changer transitions 0/440 dead transitions. [2024-06-27 21:55:57,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 440 transitions, 8043 flow [2024-06-27 21:55:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:57,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 21:55:57,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 21:55:57,497 INFO L175 Difference]: Start difference. First operand has 342 places, 404 transitions, 6501 flow. Second operand 7 states and 207 transitions. [2024-06-27 21:55:57,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 440 transitions, 8043 flow [2024-06-27 21:55:59,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 440 transitions, 7623 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:55:59,323 INFO L231 Difference]: Finished difference. Result has 342 places, 410 transitions, 6513 flow [2024-06-27 21:55:59,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6093, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6513, PETRI_PLACES=342, PETRI_TRANSITIONS=410} [2024-06-27 21:55:59,323 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 293 predicate places. [2024-06-27 21:55:59,324 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 410 transitions, 6513 flow [2024-06-27 21:55:59,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:59,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:59,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:59,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:55:59,324 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:55:59,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:59,325 INFO L85 PathProgramCache]: Analyzing trace with hash -781026733, now seen corresponding path program 15 times [2024-06-27 21:55:59,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:59,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989130403] [2024-06-27 21:55:59,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:59,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:59,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:59,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989130403] [2024-06-27 21:55:59,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989130403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:59,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:59,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:59,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874570340] [2024-06-27 21:55:59,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:59,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:59,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:59,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:59,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:59,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:55:59,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 410 transitions, 6513 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:59,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:59,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:55:59,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:00,842 INFO L124 PetriNetUnfolderBase]: 5346/8928 cut-off events. [2024-06-27 21:56:00,843 INFO L125 PetriNetUnfolderBase]: For 331858/332084 co-relation queries the response was YES. [2024-06-27 21:56:00,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54282 conditions, 8928 events. 5346/8928 cut-off events. For 331858/332084 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 66397 event pairs, 1471 based on Foata normal form. 24/8684 useless extension candidates. Maximal degree in co-relation 54134. Up to 7352 conditions per place. [2024-06-27 21:56:00,952 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 259 selfloop transitions, 158 changer transitions 0/442 dead transitions. [2024-06-27 21:56:00,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 442 transitions, 7777 flow [2024-06-27 21:56:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:56:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:56:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 21:56:00,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 21:56:00,953 INFO L175 Difference]: Start difference. First operand has 342 places, 410 transitions, 6513 flow. Second operand 7 states and 209 transitions. [2024-06-27 21:56:00,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 442 transitions, 7777 flow [2024-06-27 21:56:03,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 442 transitions, 7280 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 21:56:03,073 INFO L231 Difference]: Finished difference. Result has 344 places, 410 transitions, 6339 flow [2024-06-27 21:56:03,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6339, PETRI_PLACES=344, PETRI_TRANSITIONS=410} [2024-06-27 21:56:03,074 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 295 predicate places. [2024-06-27 21:56:03,074 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 410 transitions, 6339 flow [2024-06-27 21:56:03,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:03,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:03,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:03,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:56:03,074 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:03,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:03,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1806486957, now seen corresponding path program 16 times [2024-06-27 21:56:03,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:03,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261292090] [2024-06-27 21:56:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:03,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:03,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:03,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261292090] [2024-06-27 21:56:03,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261292090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:03,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:03,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:03,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198932074] [2024-06-27 21:56:03,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:03,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:03,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:03,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:03,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:03,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 410 transitions, 6339 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:03,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:03,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:03,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:04,691 INFO L124 PetriNetUnfolderBase]: 5360/9390 cut-off events. [2024-06-27 21:56:04,692 INFO L125 PetriNetUnfolderBase]: For 335969/336174 co-relation queries the response was YES. [2024-06-27 21:56:04,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54823 conditions, 9390 events. 5360/9390 cut-off events. For 335969/336174 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 72888 event pairs, 1741 based on Foata normal form. 34/9224 useless extension candidates. Maximal degree in co-relation 54674. Up to 7388 conditions per place. [2024-06-27 21:56:04,805 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 266 selfloop transitions, 170 changer transitions 0/461 dead transitions. [2024-06-27 21:56:04,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 461 transitions, 7918 flow [2024-06-27 21:56:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:56:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:56:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 270 transitions. [2024-06-27 21:56:04,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:56:04,806 INFO L175 Difference]: Start difference. First operand has 344 places, 410 transitions, 6339 flow. Second operand 9 states and 270 transitions. [2024-06-27 21:56:04,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 461 transitions, 7918 flow [2024-06-27 21:56:06,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 461 transitions, 7566 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:56:06,847 INFO L231 Difference]: Finished difference. Result has 347 places, 413 transitions, 6394 flow [2024-06-27 21:56:06,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5993, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6394, PETRI_PLACES=347, PETRI_TRANSITIONS=413} [2024-06-27 21:56:06,848 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 298 predicate places. [2024-06-27 21:56:06,848 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 413 transitions, 6394 flow [2024-06-27 21:56:06,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:06,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:06,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:06,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:56:06,848 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:06,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash -397511601, now seen corresponding path program 17 times [2024-06-27 21:56:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:06,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594013310] [2024-06-27 21:56:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:06,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:06,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:06,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594013310] [2024-06-27 21:56:06,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594013310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:06,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:06,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:06,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111774268] [2024-06-27 21:56:06,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:06,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:06,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:06,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:06,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:06,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:06,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 413 transitions, 6394 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:06,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:06,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:07,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:08,446 INFO L124 PetriNetUnfolderBase]: 5388/9123 cut-off events. [2024-06-27 21:56:08,446 INFO L125 PetriNetUnfolderBase]: For 340882/341169 co-relation queries the response was YES. [2024-06-27 21:56:08,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54768 conditions, 9123 events. 5388/9123 cut-off events. For 340882/341169 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 68693 event pairs, 1705 based on Foata normal form. 18/8821 useless extension candidates. Maximal degree in co-relation 54618. Up to 7845 conditions per place. [2024-06-27 21:56:08,568 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 383 selfloop transitions, 32 changer transitions 0/440 dead transitions. [2024-06-27 21:56:08,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 440 transitions, 7333 flow [2024-06-27 21:56:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:56:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:56:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-27 21:56:08,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126984126984127 [2024-06-27 21:56:08,569 INFO L175 Difference]: Start difference. First operand has 347 places, 413 transitions, 6394 flow. Second operand 7 states and 193 transitions. [2024-06-27 21:56:08,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 440 transitions, 7333 flow [2024-06-27 21:56:10,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 440 transitions, 6870 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 21:56:10,447 INFO L231 Difference]: Finished difference. Result has 345 places, 416 transitions, 6062 flow [2024-06-27 21:56:10,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5937, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6062, PETRI_PLACES=345, PETRI_TRANSITIONS=416} [2024-06-27 21:56:10,447 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 296 predicate places. [2024-06-27 21:56:10,447 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 416 transitions, 6062 flow [2024-06-27 21:56:10,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:10,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:10,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:10,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:56:10,448 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:10,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:10,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1606828977, now seen corresponding path program 18 times [2024-06-27 21:56:10,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:10,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675910356] [2024-06-27 21:56:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:10,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:10,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:10,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675910356] [2024-06-27 21:56:10,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675910356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:10,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:10,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:10,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408420961] [2024-06-27 21:56:10,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:10,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:10,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:10,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:10,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:10,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:10,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 416 transitions, 6062 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:10,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:10,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:10,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:12,149 INFO L124 PetriNetUnfolderBase]: 5417/9013 cut-off events. [2024-06-27 21:56:12,149 INFO L125 PetriNetUnfolderBase]: For 337811/338107 co-relation queries the response was YES. [2024-06-27 21:56:12,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54294 conditions, 9013 events. 5417/9013 cut-off events. For 337811/338107 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 66876 event pairs, 1425 based on Foata normal form. 46/8741 useless extension candidates. Maximal degree in co-relation 54144. Up to 7420 conditions per place. [2024-06-27 21:56:12,256 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 254 selfloop transitions, 187 changer transitions 0/466 dead transitions. [2024-06-27 21:56:12,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 466 transitions, 7500 flow [2024-06-27 21:56:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:56:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:56:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-06-27 21:56:12,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 21:56:12,256 INFO L175 Difference]: Start difference. First operand has 345 places, 416 transitions, 6062 flow. Second operand 10 states and 285 transitions. [2024-06-27 21:56:12,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 466 transitions, 7500 flow [2024-06-27 21:56:14,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 466 transitions, 7414 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:56:14,171 INFO L231 Difference]: Finished difference. Result has 350 places, 422 transitions, 6452 flow [2024-06-27 21:56:14,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6452, PETRI_PLACES=350, PETRI_TRANSITIONS=422} [2024-06-27 21:56:14,172 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 301 predicate places. [2024-06-27 21:56:14,172 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 422 transitions, 6452 flow [2024-06-27 21:56:14,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:14,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:14,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:14,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:56:14,172 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:14,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2125681363, now seen corresponding path program 19 times [2024-06-27 21:56:14,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:14,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863191692] [2024-06-27 21:56:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:14,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:14,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:14,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863191692] [2024-06-27 21:56:14,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863191692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:14,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:14,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:14,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005078460] [2024-06-27 21:56:14,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:14,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:14,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:14,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:14,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 422 transitions, 6452 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:14,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:14,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:14,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:15,827 INFO L124 PetriNetUnfolderBase]: 5414/9047 cut-off events. [2024-06-27 21:56:15,827 INFO L125 PetriNetUnfolderBase]: For 342785/343081 co-relation queries the response was YES. [2024-06-27 21:56:15,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54910 conditions, 9047 events. 5414/9047 cut-off events. For 342785/343081 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 67358 event pairs, 1490 based on Foata normal form. 26/8751 useless extension candidates. Maximal degree in co-relation 54759. Up to 7664 conditions per place. [2024-06-27 21:56:15,945 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 330 selfloop transitions, 110 changer transitions 0/465 dead transitions. [2024-06-27 21:56:15,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 465 transitions, 7618 flow [2024-06-27 21:56:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:56:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:56:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-27 21:56:15,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-27 21:56:15,946 INFO L175 Difference]: Start difference. First operand has 350 places, 422 transitions, 6452 flow. Second operand 8 states and 243 transitions. [2024-06-27 21:56:15,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 465 transitions, 7618 flow [2024-06-27 21:56:17,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 465 transitions, 7341 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 21:56:18,002 INFO L231 Difference]: Finished difference. Result has 351 places, 422 transitions, 6422 flow [2024-06-27 21:56:18,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6177, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6422, PETRI_PLACES=351, PETRI_TRANSITIONS=422} [2024-06-27 21:56:18,002 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 302 predicate places. [2024-06-27 21:56:18,003 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 422 transitions, 6422 flow [2024-06-27 21:56:18,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:18,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:18,003 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] [2024-06-27 21:56:18,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:56:18,003 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:18,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:18,003 INFO L85 PathProgramCache]: Analyzing trace with hash 232867133, now seen corresponding path program 20 times [2024-06-27 21:56:18,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:18,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681345936] [2024-06-27 21:56:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:18,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:18,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:18,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681345936] [2024-06-27 21:56:18,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681345936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:18,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:18,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593954738] [2024-06-27 21:56:18,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:18,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:18,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:18,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:18,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 422 transitions, 6422 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:18,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:18,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:18,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:19,704 INFO L124 PetriNetUnfolderBase]: 5396/9430 cut-off events. [2024-06-27 21:56:19,704 INFO L125 PetriNetUnfolderBase]: For 342013/342237 co-relation queries the response was YES. [2024-06-27 21:56:19,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54917 conditions, 9430 events. 5396/9430 cut-off events. For 342013/342237 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 73129 event pairs, 1770 based on Foata normal form. 28/9251 useless extension candidates. Maximal degree in co-relation 54766. Up to 7676 conditions per place. [2024-06-27 21:56:19,829 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 325 selfloop transitions, 109 changer transitions 0/459 dead transitions. [2024-06-27 21:56:19,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 459 transitions, 7562 flow [2024-06-27 21:56:19,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:56:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:56:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-27 21:56:19,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-06-27 21:56:19,830 INFO L175 Difference]: Start difference. First operand has 351 places, 422 transitions, 6422 flow. Second operand 7 states and 215 transitions. [2024-06-27 21:56:19,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 459 transitions, 7562 flow [2024-06-27 21:56:21,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 459 transitions, 7140 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-06-27 21:56:21,722 INFO L231 Difference]: Finished difference. Result has 346 places, 422 transitions, 6245 flow [2024-06-27 21:56:21,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6006, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6245, PETRI_PLACES=346, PETRI_TRANSITIONS=422} [2024-06-27 21:56:21,722 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 297 predicate places. [2024-06-27 21:56:21,722 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 422 transitions, 6245 flow [2024-06-27 21:56:21,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:21,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:21,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:21,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:56:21,723 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:21,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:21,723 INFO L85 PathProgramCache]: Analyzing trace with hash -14855011, now seen corresponding path program 21 times [2024-06-27 21:56:21,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:21,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061533932] [2024-06-27 21:56:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:21,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:21,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:21,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061533932] [2024-06-27 21:56:21,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061533932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:21,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:21,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:21,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487276828] [2024-06-27 21:56:21,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:21,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:21,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:21,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:21,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:21,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:21,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 422 transitions, 6245 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:21,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:21,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:21,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:23,334 INFO L124 PetriNetUnfolderBase]: 5408/9001 cut-off events. [2024-06-27 21:56:23,334 INFO L125 PetriNetUnfolderBase]: For 321260/321562 co-relation queries the response was YES. [2024-06-27 21:56:23,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53975 conditions, 9001 events. 5408/9001 cut-off events. For 321260/321562 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 66785 event pairs, 1428 based on Foata normal form. 50/8734 useless extension candidates. Maximal degree in co-relation 53827. Up to 7411 conditions per place. [2024-06-27 21:56:23,450 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 261 selfloop transitions, 179 changer transitions 0/465 dead transitions. [2024-06-27 21:56:23,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 465 transitions, 7405 flow [2024-06-27 21:56:23,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:56:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:56:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2024-06-27 21:56:23,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 21:56:23,451 INFO L175 Difference]: Start difference. First operand has 346 places, 422 transitions, 6245 flow. Second operand 9 states and 264 transitions. [2024-06-27 21:56:23,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 465 transitions, 7405 flow [2024-06-27 21:56:25,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 465 transitions, 7026 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 21:56:25,276 INFO L231 Difference]: Finished difference. Result has 347 places, 422 transitions, 6236 flow [2024-06-27 21:56:25,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5868, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6236, PETRI_PLACES=347, PETRI_TRANSITIONS=422} [2024-06-27 21:56:25,277 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 298 predicate places. [2024-06-27 21:56:25,277 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 422 transitions, 6236 flow [2024-06-27 21:56:25,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:25,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:25,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:25,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:56:25,277 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:25,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash 53234989, now seen corresponding path program 22 times [2024-06-27 21:56:25,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:25,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586772204] [2024-06-27 21:56:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:25,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:25,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586772204] [2024-06-27 21:56:25,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586772204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:25,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:25,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:25,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353225533] [2024-06-27 21:56:25,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:25,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:25,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:25,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:25,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:25,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 422 transitions, 6236 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:25,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:25,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:25,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:26,943 INFO L124 PetriNetUnfolderBase]: 5380/9376 cut-off events. [2024-06-27 21:56:26,943 INFO L125 PetriNetUnfolderBase]: For 321002/321309 co-relation queries the response was YES. [2024-06-27 21:56:27,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54294 conditions, 9376 events. 5380/9376 cut-off events. For 321002/321309 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 72672 event pairs, 1915 based on Foata normal form. 39/9087 useless extension candidates. Maximal degree in co-relation 54146. Up to 7755 conditions per place. [2024-06-27 21:56:27,063 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 377 selfloop transitions, 53 changer transitions 0/455 dead transitions. [2024-06-27 21:56:27,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 455 transitions, 7176 flow [2024-06-27 21:56:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:56:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:56:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 21:56:27,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 21:56:27,064 INFO L175 Difference]: Start difference. First operand has 347 places, 422 transitions, 6236 flow. Second operand 6 states and 185 transitions. [2024-06-27 21:56:27,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 455 transitions, 7176 flow [2024-06-27 21:56:28,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 455 transitions, 6713 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-27 21:56:28,964 INFO L231 Difference]: Finished difference. Result has 342 places, 422 transitions, 5907 flow [2024-06-27 21:56:28,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5773, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5907, PETRI_PLACES=342, PETRI_TRANSITIONS=422} [2024-06-27 21:56:28,964 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 293 predicate places. [2024-06-27 21:56:28,964 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 422 transitions, 5907 flow [2024-06-27 21:56:28,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:28,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:28,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:28,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:56:28,964 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:28,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:28,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1954188813, now seen corresponding path program 4 times [2024-06-27 21:56:28,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:28,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041366888] [2024-06-27 21:56:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:28,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:29,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:29,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041366888] [2024-06-27 21:56:29,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041366888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:29,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:29,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:29,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551703357] [2024-06-27 21:56:29,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:29,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:29,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:29,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:29,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:29,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:29,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 422 transitions, 5907 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:29,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:29,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:29,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:30,727 INFO L124 PetriNetUnfolderBase]: 5372/9376 cut-off events. [2024-06-27 21:56:30,728 INFO L125 PetriNetUnfolderBase]: For 315074/315388 co-relation queries the response was YES. [2024-06-27 21:56:30,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53258 conditions, 9376 events. 5372/9376 cut-off events. For 315074/315388 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 72439 event pairs, 1933 based on Foata normal form. 44/9158 useless extension candidates. Maximal degree in co-relation 53110. Up to 7113 conditions per place. [2024-06-27 21:56:30,834 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 381 selfloop transitions, 59 changer transitions 0/465 dead transitions. [2024-06-27 21:56:30,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 465 transitions, 6927 flow [2024-06-27 21:56:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:56:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:56:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 21:56:30,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6730158730158731 [2024-06-27 21:56:30,835 INFO L175 Difference]: Start difference. First operand has 342 places, 422 transitions, 5907 flow. Second operand 7 states and 212 transitions. [2024-06-27 21:56:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 465 transitions, 6927 flow [2024-06-27 21:56:32,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 465 transitions, 6858 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:56:32,506 INFO L231 Difference]: Finished difference. Result has 346 places, 422 transitions, 5966 flow [2024-06-27 21:56:32,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5838, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5966, PETRI_PLACES=346, PETRI_TRANSITIONS=422} [2024-06-27 21:56:32,506 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 297 predicate places. [2024-06-27 21:56:32,506 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 422 transitions, 5966 flow [2024-06-27 21:56:32,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:32,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:32,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:32,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:56:32,507 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:32,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:32,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2096159467, now seen corresponding path program 7 times [2024-06-27 21:56:32,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:32,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343448773] [2024-06-27 21:56:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:32,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:32,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:32,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343448773] [2024-06-27 21:56:32,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343448773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:32,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:32,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:32,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422651096] [2024-06-27 21:56:32,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:32,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:32,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:32,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:32,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:32,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 422 transitions, 5966 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:32,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:32,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:32,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:34,180 INFO L124 PetriNetUnfolderBase]: 5561/9381 cut-off events. [2024-06-27 21:56:34,180 INFO L125 PetriNetUnfolderBase]: For 354534/354820 co-relation queries the response was YES. [2024-06-27 21:56:34,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55661 conditions, 9381 events. 5561/9381 cut-off events. For 354534/354820 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 70753 event pairs, 1652 based on Foata normal form. 54/9119 useless extension candidates. Maximal degree in co-relation 55512. Up to 7547 conditions per place. [2024-06-27 21:56:34,305 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 334 selfloop transitions, 107 changer transitions 0/466 dead transitions. [2024-06-27 21:56:34,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 466 transitions, 7210 flow [2024-06-27 21:56:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:56:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:56:34,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 21:56:34,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-06-27 21:56:34,306 INFO L175 Difference]: Start difference. First operand has 346 places, 422 transitions, 5966 flow. Second operand 8 states and 233 transitions. [2024-06-27 21:56:34,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 466 transitions, 7210 flow [2024-06-27 21:56:36,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 466 transitions, 7083 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:56:36,332 INFO L231 Difference]: Finished difference. Result has 348 places, 424 transitions, 6107 flow [2024-06-27 21:56:36,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5847, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6107, PETRI_PLACES=348, PETRI_TRANSITIONS=424} [2024-06-27 21:56:36,333 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 299 predicate places. [2024-06-27 21:56:36,333 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 424 transitions, 6107 flow [2024-06-27 21:56:36,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:36,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:36,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:36,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:56:36,333 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:36,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:36,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2007445837, now seen corresponding path program 8 times [2024-06-27 21:56:36,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:36,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163956629] [2024-06-27 21:56:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:36,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:36,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:36,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163956629] [2024-06-27 21:56:36,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163956629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:36,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:36,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:36,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414448334] [2024-06-27 21:56:36,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:36,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:36,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:36,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:36,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:36,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:36,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 424 transitions, 6107 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:36,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:36,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:36,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:38,062 INFO L124 PetriNetUnfolderBase]: 5590/9535 cut-off events. [2024-06-27 21:56:38,062 INFO L125 PetriNetUnfolderBase]: For 349993/350344 co-relation queries the response was YES. [2024-06-27 21:56:38,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55969 conditions, 9535 events. 5590/9535 cut-off events. For 349993/350344 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 72864 event pairs, 1743 based on Foata normal form. 83/9286 useless extension candidates. Maximal degree in co-relation 55821. Up to 7839 conditions per place. [2024-06-27 21:56:38,183 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 333 selfloop transitions, 101 changer transitions 0/459 dead transitions. [2024-06-27 21:56:38,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 459 transitions, 7107 flow [2024-06-27 21:56:38,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:56:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:56:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 21:56:38,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-27 21:56:38,184 INFO L175 Difference]: Start difference. First operand has 348 places, 424 transitions, 6107 flow. Second operand 8 states and 226 transitions. [2024-06-27 21:56:38,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 459 transitions, 7107 flow [2024-06-27 21:56:39,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 459 transitions, 6965 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:56:39,948 INFO L231 Difference]: Finished difference. Result has 352 places, 425 transitions, 6196 flow [2024-06-27 21:56:39,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5969, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6196, PETRI_PLACES=352, PETRI_TRANSITIONS=425} [2024-06-27 21:56:39,948 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 303 predicate places. [2024-06-27 21:56:39,948 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 425 transitions, 6196 flow [2024-06-27 21:56:39,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:39,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:39,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:39,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:56:39,949 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:39,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:39,949 INFO L85 PathProgramCache]: Analyzing trace with hash -387215693, now seen corresponding path program 9 times [2024-06-27 21:56:39,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:39,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279754238] [2024-06-27 21:56:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:39,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:40,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:40,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279754238] [2024-06-27 21:56:40,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279754238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:40,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:40,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:40,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111238946] [2024-06-27 21:56:40,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:40,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:40,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:40,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:40,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:40,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:40,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 425 transitions, 6196 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:40,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:40,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:40,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:41,639 INFO L124 PetriNetUnfolderBase]: 5643/9608 cut-off events. [2024-06-27 21:56:41,639 INFO L125 PetriNetUnfolderBase]: For 346913/347269 co-relation queries the response was YES. [2024-06-27 21:56:41,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56567 conditions, 9608 events. 5643/9608 cut-off events. For 346913/347269 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 73479 event pairs, 1738 based on Foata normal form. 82/9354 useless extension candidates. Maximal degree in co-relation 56417. Up to 7841 conditions per place. [2024-06-27 21:56:41,771 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 335 selfloop transitions, 103 changer transitions 0/463 dead transitions. [2024-06-27 21:56:41,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 463 transitions, 7220 flow [2024-06-27 21:56:41,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:56:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:56:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 21:56:41,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6361111111111111 [2024-06-27 21:56:41,772 INFO L175 Difference]: Start difference. First operand has 352 places, 425 transitions, 6196 flow. Second operand 8 states and 229 transitions. [2024-06-27 21:56:41,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 463 transitions, 7220 flow [2024-06-27 21:56:43,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 463 transitions, 7013 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:56:43,864 INFO L231 Difference]: Finished difference. Result has 354 places, 426 transitions, 6221 flow [2024-06-27 21:56:43,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5989, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6221, PETRI_PLACES=354, PETRI_TRANSITIONS=426} [2024-06-27 21:56:43,865 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 305 predicate places. [2024-06-27 21:56:43,865 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 426 transitions, 6221 flow [2024-06-27 21:56:43,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:43,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:43,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:43,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:56:43,865 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:43,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1684530641, now seen corresponding path program 10 times [2024-06-27 21:56:43,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:43,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069515395] [2024-06-27 21:56:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:43,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:43,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069515395] [2024-06-27 21:56:43,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069515395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:43,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:43,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:43,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436254992] [2024-06-27 21:56:43,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:43,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:43,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:43,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:43,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:44,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:44,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 426 transitions, 6221 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:44,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:44,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:44,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:45,592 INFO L124 PetriNetUnfolderBase]: 5808/9772 cut-off events. [2024-06-27 21:56:45,592 INFO L125 PetriNetUnfolderBase]: For 377982/378274 co-relation queries the response was YES. [2024-06-27 21:56:45,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58628 conditions, 9772 events. 5808/9772 cut-off events. For 377982/378274 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 73872 event pairs, 1582 based on Foata normal form. 55/9519 useless extension candidates. Maximal degree in co-relation 58477. Up to 6268 conditions per place. [2024-06-27 21:56:45,717 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 321 selfloop transitions, 129 changer transitions 0/475 dead transitions. [2024-06-27 21:56:45,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 475 transitions, 7709 flow [2024-06-27 21:56:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:56:45,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:56:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 21:56:45,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 21:56:45,718 INFO L175 Difference]: Start difference. First operand has 354 places, 426 transitions, 6221 flow. Second operand 8 states and 237 transitions. [2024-06-27 21:56:45,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 475 transitions, 7709 flow [2024-06-27 21:56:47,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 475 transitions, 7491 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:56:47,763 INFO L231 Difference]: Finished difference. Result has 356 places, 428 transitions, 6311 flow [2024-06-27 21:56:47,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6003, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6311, PETRI_PLACES=356, PETRI_TRANSITIONS=428} [2024-06-27 21:56:47,764 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 307 predicate places. [2024-06-27 21:56:47,764 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 428 transitions, 6311 flow [2024-06-27 21:56:47,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:47,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:47,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:47,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:56:47,765 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:47,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash 190119189, now seen corresponding path program 11 times [2024-06-27 21:56:47,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:47,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535146641] [2024-06-27 21:56:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:47,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:47,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:47,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535146641] [2024-06-27 21:56:47,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535146641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:47,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:47,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:47,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323205358] [2024-06-27 21:56:47,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:47,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:47,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:47,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:47,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:47,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:47,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 428 transitions, 6311 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:47,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:47,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:47,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:49,616 INFO L124 PetriNetUnfolderBase]: 5903/9962 cut-off events. [2024-06-27 21:56:49,616 INFO L125 PetriNetUnfolderBase]: For 415308/415600 co-relation queries the response was YES. [2024-06-27 21:56:49,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60796 conditions, 9962 events. 5903/9962 cut-off events. For 415308/415600 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 75956 event pairs, 1590 based on Foata normal form. 53/9696 useless extension candidates. Maximal degree in co-relation 60644. Up to 6321 conditions per place. [2024-06-27 21:56:49,737 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 323 selfloop transitions, 127 changer transitions 0/475 dead transitions. [2024-06-27 21:56:49,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 475 transitions, 7791 flow [2024-06-27 21:56:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:56:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:56:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 21:56:49,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-06-27 21:56:49,738 INFO L175 Difference]: Start difference. First operand has 356 places, 428 transitions, 6311 flow. Second operand 8 states and 235 transitions. [2024-06-27 21:56:49,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 475 transitions, 7791 flow [2024-06-27 21:56:52,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 475 transitions, 7501 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:56:52,115 INFO L231 Difference]: Finished difference. Result has 359 places, 430 transitions, 6327 flow [2024-06-27 21:56:52,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6033, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6327, PETRI_PLACES=359, PETRI_TRANSITIONS=430} [2024-06-27 21:56:52,115 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 310 predicate places. [2024-06-27 21:56:52,115 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 430 transitions, 6327 flow [2024-06-27 21:56:52,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:52,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:52,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:52,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:56:52,116 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:52,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:52,116 INFO L85 PathProgramCache]: Analyzing trace with hash 190534899, now seen corresponding path program 12 times [2024-06-27 21:56:52,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:52,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966182790] [2024-06-27 21:56:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:52,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:52,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:52,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966182790] [2024-06-27 21:56:52,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966182790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:52,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:52,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:52,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239340095] [2024-06-27 21:56:52,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:52,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:52,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:52,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:52,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 430 transitions, 6327 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:52,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:52,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:52,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:54,023 INFO L124 PetriNetUnfolderBase]: 5910/10427 cut-off events. [2024-06-27 21:56:54,023 INFO L125 PetriNetUnfolderBase]: For 396551/396715 co-relation queries the response was YES. [2024-06-27 21:56:54,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60966 conditions, 10427 events. 5910/10427 cut-off events. For 396551/396715 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 82622 event pairs, 2321 based on Foata normal form. 12/10260 useless extension candidates. Maximal degree in co-relation 60813. Up to 8161 conditions per place. [2024-06-27 21:56:54,156 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 406 selfloop transitions, 40 changer transitions 0/471 dead transitions. [2024-06-27 21:56:54,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 471 transitions, 7367 flow [2024-06-27 21:56:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:56:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:56:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 21:56:54,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-27 21:56:54,157 INFO L175 Difference]: Start difference. First operand has 359 places, 430 transitions, 6327 flow. Second operand 8 states and 226 transitions. [2024-06-27 21:56:54,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 471 transitions, 7367 flow [2024-06-27 21:56:56,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 471 transitions, 7170 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:56:56,896 INFO L231 Difference]: Finished difference. Result has 363 places, 430 transitions, 6214 flow [2024-06-27 21:56:56,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6130, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6214, PETRI_PLACES=363, PETRI_TRANSITIONS=430} [2024-06-27 21:56:56,897 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 314 predicate places. [2024-06-27 21:56:56,897 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 430 transitions, 6214 flow [2024-06-27 21:56:56,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:56,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:56,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:56,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:56:56,897 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:56,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash -597115661, now seen corresponding path program 13 times [2024-06-27 21:56:56,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:56,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118791594] [2024-06-27 21:56:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:56,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:57,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118791594] [2024-06-27 21:56:57,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118791594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:57,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:57,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:56:57,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272205333] [2024-06-27 21:56:57,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:57,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:57,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:57,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:57,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:56:57,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 430 transitions, 6214 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:57,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:57,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:56:57,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:58,817 INFO L124 PetriNetUnfolderBase]: 5933/10535 cut-off events. [2024-06-27 21:56:58,818 INFO L125 PetriNetUnfolderBase]: For 401771/401940 co-relation queries the response was YES. [2024-06-27 21:56:58,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60537 conditions, 10535 events. 5933/10535 cut-off events. For 401771/401940 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 84230 event pairs, 2503 based on Foata normal form. 13/10371 useless extension candidates. Maximal degree in co-relation 60383. Up to 8471 conditions per place. [2024-06-27 21:56:58,949 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 409 selfloop transitions, 34 changer transitions 0/468 dead transitions. [2024-06-27 21:56:58,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 468 transitions, 7257 flow [2024-06-27 21:56:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:56:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:56:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 21:56:58,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-06-27 21:56:58,950 INFO L175 Difference]: Start difference. First operand has 363 places, 430 transitions, 6214 flow. Second operand 8 states and 223 transitions. [2024-06-27 21:56:58,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 468 transitions, 7257 flow [2024-06-27 21:57:01,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 468 transitions, 7172 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:57:01,227 INFO L231 Difference]: Finished difference. Result has 364 places, 431 transitions, 6222 flow [2024-06-27 21:57:01,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6222, PETRI_PLACES=364, PETRI_TRANSITIONS=431} [2024-06-27 21:57:01,228 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 315 predicate places. [2024-06-27 21:57:01,228 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 431 transitions, 6222 flow [2024-06-27 21:57:01,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:01,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:01,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:01,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:57:01,228 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:01,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2011188421, now seen corresponding path program 14 times [2024-06-27 21:57:01,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:01,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110790694] [2024-06-27 21:57:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:01,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:01,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:01,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110790694] [2024-06-27 21:57:01,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110790694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:01,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:01,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:01,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979596119] [2024-06-27 21:57:01,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:01,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:01,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:01,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:57:01,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 431 transitions, 6222 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:01,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:01,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:57:01,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:03,219 INFO L124 PetriNetUnfolderBase]: 5994/10208 cut-off events. [2024-06-27 21:57:03,219 INFO L125 PetriNetUnfolderBase]: For 416678/416981 co-relation queries the response was YES. [2024-06-27 21:57:03,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60459 conditions, 10208 events. 5994/10208 cut-off events. For 416678/416981 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 79080 event pairs, 1879 based on Foata normal form. 57/9923 useless extension candidates. Maximal degree in co-relation 60304. Up to 8452 conditions per place. [2024-06-27 21:57:03,348 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 341 selfloop transitions, 97 changer transitions 0/463 dead transitions. [2024-06-27 21:57:03,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 463 transitions, 7223 flow [2024-06-27 21:57:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:57:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:57:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 21:57:03,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 21:57:03,349 INFO L175 Difference]: Start difference. First operand has 364 places, 431 transitions, 6222 flow. Second operand 8 states and 224 transitions. [2024-06-27 21:57:03,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 463 transitions, 7223 flow [2024-06-27 21:57:05,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 463 transitions, 7145 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:57:05,757 INFO L231 Difference]: Finished difference. Result has 366 places, 432 transitions, 6368 flow [2024-06-27 21:57:05,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6368, PETRI_PLACES=366, PETRI_TRANSITIONS=432} [2024-06-27 21:57:05,758 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 317 predicate places. [2024-06-27 21:57:05,758 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 432 transitions, 6368 flow [2024-06-27 21:57:05,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:05,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:05,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:05,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:57:05,758 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:05,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash -683604143, now seen corresponding path program 15 times [2024-06-27 21:57:05,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:05,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876514432] [2024-06-27 21:57:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:05,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876514432] [2024-06-27 21:57:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876514432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:05,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:05,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:05,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834565652] [2024-06-27 21:57:05,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:05,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:05,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:05,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:05,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:05,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:57:05,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 432 transitions, 6368 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:05,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:05,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:57:05,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:07,650 INFO L124 PetriNetUnfolderBase]: 6217/10592 cut-off events. [2024-06-27 21:57:07,650 INFO L125 PetriNetUnfolderBase]: For 491909/492297 co-relation queries the response was YES. [2024-06-27 21:57:07,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64360 conditions, 10592 events. 6217/10592 cut-off events. For 491909/492297 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 82646 event pairs, 1877 based on Foata normal form. 84/10323 useless extension candidates. Maximal degree in co-relation 64204. Up to 7903 conditions per place. [2024-06-27 21:57:07,794 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 340 selfloop transitions, 110 changer transitions 0/475 dead transitions. [2024-06-27 21:57:07,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 475 transitions, 7881 flow [2024-06-27 21:57:07,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:57:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:57:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 21:57:07,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 21:57:07,795 INFO L175 Difference]: Start difference. First operand has 366 places, 432 transitions, 6368 flow. Second operand 8 states and 231 transitions. [2024-06-27 21:57:07,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 475 transitions, 7881 flow [2024-06-27 21:57:11,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 475 transitions, 7678 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:57:11,072 INFO L231 Difference]: Finished difference. Result has 369 places, 435 transitions, 6486 flow [2024-06-27 21:57:11,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6165, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6486, PETRI_PLACES=369, PETRI_TRANSITIONS=435} [2024-06-27 21:57:11,073 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 320 predicate places. [2024-06-27 21:57:11,073 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 435 transitions, 6486 flow [2024-06-27 21:57:11,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:11,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:11,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:11,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:57:11,073 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:11,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:11,074 INFO L85 PathProgramCache]: Analyzing trace with hash -863228651, now seen corresponding path program 16 times [2024-06-27 21:57:11,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:11,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081489134] [2024-06-27 21:57:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:11,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:11,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:11,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081489134] [2024-06-27 21:57:11,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081489134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:11,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:11,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:11,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304456698] [2024-06-27 21:57:11,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:11,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:11,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:11,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:57:11,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 435 transitions, 6486 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:11,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:11,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:57:11,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:13,217 INFO L124 PetriNetUnfolderBase]: 6285/10709 cut-off events. [2024-06-27 21:57:13,217 INFO L125 PetriNetUnfolderBase]: For 504288/504591 co-relation queries the response was YES. [2024-06-27 21:57:13,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65913 conditions, 10709 events. 6285/10709 cut-off events. For 504288/504591 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 83694 event pairs, 1975 based on Foata normal form. 55/10427 useless extension candidates. Maximal degree in co-relation 65755. Up to 8710 conditions per place. [2024-06-27 21:57:13,341 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 346 selfloop transitions, 100 changer transitions 0/471 dead transitions. [2024-06-27 21:57:13,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 471 transitions, 7720 flow [2024-06-27 21:57:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:57:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:57:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 21:57:13,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-27 21:57:13,352 INFO L175 Difference]: Start difference. First operand has 369 places, 435 transitions, 6486 flow. Second operand 8 states and 227 transitions. [2024-06-27 21:57:13,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 471 transitions, 7720 flow [2024-06-27 21:57:16,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 471 transitions, 7601 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:57:16,190 INFO L231 Difference]: Finished difference. Result has 374 places, 436 transitions, 6599 flow [2024-06-27 21:57:16,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6367, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6599, PETRI_PLACES=374, PETRI_TRANSITIONS=436} [2024-06-27 21:57:16,191 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 325 predicate places. [2024-06-27 21:57:16,191 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 436 transitions, 6599 flow [2024-06-27 21:57:16,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:16,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:16,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:16,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:57:16,191 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:16,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1156794543, now seen corresponding path program 17 times [2024-06-27 21:57:16,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:16,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030182680] [2024-06-27 21:57:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:16,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:16,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:16,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030182680] [2024-06-27 21:57:16,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030182680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:16,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:16,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368808160] [2024-06-27 21:57:16,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:16,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:16,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:16,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:57:16,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 436 transitions, 6599 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:16,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:16,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:57:16,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:18,520 INFO L124 PetriNetUnfolderBase]: 6245/10689 cut-off events. [2024-06-27 21:57:18,520 INFO L125 PetriNetUnfolderBase]: For 484145/484462 co-relation queries the response was YES. [2024-06-27 21:57:18,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65190 conditions, 10689 events. 6245/10689 cut-off events. For 484145/484462 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 84008 event pairs, 2056 based on Foata normal form. 35/10370 useless extension candidates. Maximal degree in co-relation 65030. Up to 9051 conditions per place. [2024-06-27 21:57:18,649 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 408 selfloop transitions, 34 changer transitions 0/467 dead transitions. [2024-06-27 21:57:18,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 467 transitions, 7585 flow [2024-06-27 21:57:18,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:57:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:57:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-27 21:57:18,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-27 21:57:18,652 INFO L175 Difference]: Start difference. First operand has 374 places, 436 transitions, 6599 flow. Second operand 8 states and 219 transitions. [2024-06-27 21:57:18,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 467 transitions, 7585 flow [2024-06-27 21:57:21,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 467 transitions, 7341 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:57:21,500 INFO L231 Difference]: Finished difference. Result has 376 places, 436 transitions, 6428 flow [2024-06-27 21:57:21,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6355, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6428, PETRI_PLACES=376, PETRI_TRANSITIONS=436} [2024-06-27 21:57:21,500 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 327 predicate places. [2024-06-27 21:57:21,500 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 436 transitions, 6428 flow [2024-06-27 21:57:21,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:21,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:21,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:21,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:57:21,501 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:21,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:21,501 INFO L85 PathProgramCache]: Analyzing trace with hash -455012591, now seen corresponding path program 18 times [2024-06-27 21:57:21,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:21,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176276743] [2024-06-27 21:57:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:21,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:21,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176276743] [2024-06-27 21:57:21,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176276743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:21,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:21,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:21,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405152044] [2024-06-27 21:57:21,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:21,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:21,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:21,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:21,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:21,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:57:21,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 436 transitions, 6428 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:21,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:21,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:57:21,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:23,997 INFO L124 PetriNetUnfolderBase]: 6277/11195 cut-off events. [2024-06-27 21:57:23,997 INFO L125 PetriNetUnfolderBase]: For 450068/450266 co-relation queries the response was YES. [2024-06-27 21:57:24,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64651 conditions, 11195 events. 6277/11195 cut-off events. For 450068/450266 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 91062 event pairs, 2710 based on Foata normal form. 18/11028 useless extension candidates. Maximal degree in co-relation 64490. Up to 8936 conditions per place. [2024-06-27 21:57:24,121 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 413 selfloop transitions, 36 changer transitions 0/474 dead transitions. [2024-06-27 21:57:24,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 474 transitions, 7476 flow [2024-06-27 21:57:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:57:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:57:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-27 21:57:24,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074074074074074 [2024-06-27 21:57:24,122 INFO L175 Difference]: Start difference. First operand has 376 places, 436 transitions, 6428 flow. Second operand 9 states and 246 transitions. [2024-06-27 21:57:24,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 474 transitions, 7476 flow [2024-06-27 21:57:26,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 474 transitions, 7392 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:57:26,852 INFO L231 Difference]: Finished difference. Result has 378 places, 436 transitions, 6420 flow [2024-06-27 21:57:26,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6344, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6420, PETRI_PLACES=378, PETRI_TRANSITIONS=436} [2024-06-27 21:57:26,853 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 329 predicate places. [2024-06-27 21:57:26,853 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 436 transitions, 6420 flow [2024-06-27 21:57:26,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:26,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:26,853 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] [2024-06-27 21:57:26,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:57:26,853 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:26,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:26,854 INFO L85 PathProgramCache]: Analyzing trace with hash -780663599, now seen corresponding path program 19 times [2024-06-27 21:57:26,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:26,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32507389] [2024-06-27 21:57:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:26,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:26,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:26,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32507389] [2024-06-27 21:57:26,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32507389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:26,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:26,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:26,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942723633] [2024-06-27 21:57:26,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:26,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:26,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:26,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:26,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:27,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:57:27,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 436 transitions, 6420 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:27,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:27,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:57:27,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:29,234 INFO L124 PetriNetUnfolderBase]: 6297/10804 cut-off events. [2024-06-27 21:57:29,235 INFO L125 PetriNetUnfolderBase]: For 459200/459597 co-relation queries the response was YES. [2024-06-27 21:57:29,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64288 conditions, 10804 events. 6297/10804 cut-off events. For 459200/459597 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 85264 event pairs, 2003 based on Foata normal form. 80/10516 useless extension candidates. Maximal degree in co-relation 64126. Up to 8806 conditions per place. [2024-06-27 21:57:29,355 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 319 selfloop transitions, 124 changer transitions 0/468 dead transitions. [2024-06-27 21:57:29,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 468 transitions, 7437 flow [2024-06-27 21:57:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:57:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:57:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 21:57:29,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-27 21:57:29,355 INFO L175 Difference]: Start difference. First operand has 378 places, 436 transitions, 6420 flow. Second operand 7 states and 204 transitions. [2024-06-27 21:57:29,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 468 transitions, 7437 flow [2024-06-27 21:57:32,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 468 transitions, 7360 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:57:32,185 INFO L231 Difference]: Finished difference. Result has 378 places, 437 transitions, 6625 flow [2024-06-27 21:57:32,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6343, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6625, PETRI_PLACES=378, PETRI_TRANSITIONS=437} [2024-06-27 21:57:32,185 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 329 predicate places. [2024-06-27 21:57:32,185 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 437 transitions, 6625 flow [2024-06-27 21:57:32,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:32,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:32,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:32,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:57:32,186 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:32,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:32,186 INFO L85 PathProgramCache]: Analyzing trace with hash -797149837, now seen corresponding path program 20 times [2024-06-27 21:57:32,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:32,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310160533] [2024-06-27 21:57:32,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:32,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:32,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:32,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310160533] [2024-06-27 21:57:32,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310160533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:32,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:32,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:32,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425633702] [2024-06-27 21:57:32,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:32,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:32,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:32,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:32,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:32,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:57:32,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 437 transitions, 6625 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:32,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:32,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:57:32,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:34,696 INFO L124 PetriNetUnfolderBase]: 6347/10855 cut-off events. [2024-06-27 21:57:34,696 INFO L125 PetriNetUnfolderBase]: For 461053/461449 co-relation queries the response was YES. [2024-06-27 21:57:34,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65120 conditions, 10855 events. 6347/10855 cut-off events. For 461053/461449 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 85487 event pairs, 1985 based on Foata normal form. 83/10558 useless extension candidates. Maximal degree in co-relation 64957. Up to 8676 conditions per place. [2024-06-27 21:57:34,814 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 323 selfloop transitions, 128 changer transitions 0/476 dead transitions. [2024-06-27 21:57:34,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 476 transitions, 7888 flow [2024-06-27 21:57:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:57:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:57:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 21:57:34,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 21:57:34,815 INFO L175 Difference]: Start difference. First operand has 378 places, 437 transitions, 6625 flow. Second operand 7 states and 211 transitions. [2024-06-27 21:57:34,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 476 transitions, 7888 flow [2024-06-27 21:57:37,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 476 transitions, 7627 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:57:37,420 INFO L231 Difference]: Finished difference. Result has 380 places, 438 transitions, 6653 flow [2024-06-27 21:57:37,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6364, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6653, PETRI_PLACES=380, PETRI_TRANSITIONS=438} [2024-06-27 21:57:37,420 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 331 predicate places. [2024-06-27 21:57:37,420 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 438 transitions, 6653 flow [2024-06-27 21:57:37,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:37,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:37,421 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] [2024-06-27 21:57:37,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:57:37,421 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:37,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:37,421 INFO L85 PathProgramCache]: Analyzing trace with hash -381166289, now seen corresponding path program 21 times [2024-06-27 21:57:37,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:37,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549001334] [2024-06-27 21:57:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:37,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:37,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:37,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549001334] [2024-06-27 21:57:37,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549001334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:37,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:37,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:37,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744100821] [2024-06-27 21:57:37,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:37,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:37,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:37,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:37,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:37,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:57:37,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 438 transitions, 6653 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:37,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:37,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:57:37,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:39,857 INFO L124 PetriNetUnfolderBase]: 6396/10961 cut-off events. [2024-06-27 21:57:39,858 INFO L125 PetriNetUnfolderBase]: For 479562/479952 co-relation queries the response was YES. [2024-06-27 21:57:39,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65767 conditions, 10961 events. 6396/10961 cut-off events. For 479562/479952 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 86706 event pairs, 2144 based on Foata normal form. 38/10603 useless extension candidates. Maximal degree in co-relation 65603. Up to 9281 conditions per place. [2024-06-27 21:57:39,982 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 412 selfloop transitions, 30 changer transitions 0/467 dead transitions. [2024-06-27 21:57:39,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 467 transitions, 7664 flow [2024-06-27 21:57:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:57:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:57:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 21:57:39,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 21:57:39,983 INFO L175 Difference]: Start difference. First operand has 380 places, 438 transitions, 6653 flow. Second operand 7 states and 195 transitions. [2024-06-27 21:57:39,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 467 transitions, 7664 flow [2024-06-27 21:57:43,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 467 transitions, 7340 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:57:43,011 INFO L231 Difference]: Finished difference. Result has 381 places, 439 transitions, 6427 flow [2024-06-27 21:57:43,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6333, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6427, PETRI_PLACES=381, PETRI_TRANSITIONS=439} [2024-06-27 21:57:43,011 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 332 predicate places. [2024-06-27 21:57:43,011 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 439 transitions, 6427 flow [2024-06-27 21:57:43,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:43,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:43,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:43,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:57:43,011 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:43,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:43,012 INFO L85 PathProgramCache]: Analyzing trace with hash -372595409, now seen corresponding path program 22 times [2024-06-27 21:57:43,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:43,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979589194] [2024-06-27 21:57:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:43,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:43,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:43,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979589194] [2024-06-27 21:57:43,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979589194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:43,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:43,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:43,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136484494] [2024-06-27 21:57:43,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:43,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:43,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:43,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:57:43,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 439 transitions, 6427 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:43,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:43,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:57:43,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:45,484 INFO L124 PetriNetUnfolderBase]: 6569/11216 cut-off events. [2024-06-27 21:57:45,485 INFO L125 PetriNetUnfolderBase]: For 481953/482294 co-relation queries the response was YES. [2024-06-27 21:57:45,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66431 conditions, 11216 events. 6569/11216 cut-off events. For 481953/482294 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 88660 event pairs, 2095 based on Foata normal form. 25/10868 useless extension candidates. Maximal degree in co-relation 66267. Up to 9348 conditions per place. [2024-06-27 21:57:45,619 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 419 selfloop transitions, 32 changer transitions 0/476 dead transitions. [2024-06-27 21:57:45,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 476 transitions, 7510 flow [2024-06-27 21:57:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:57:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:57:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-27 21:57:45,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 21:57:45,621 INFO L175 Difference]: Start difference. First operand has 381 places, 439 transitions, 6427 flow. Second operand 8 states and 222 transitions. [2024-06-27 21:57:45,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 476 transitions, 7510 flow [2024-06-27 21:57:48,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 476 transitions, 7437 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:57:48,600 INFO L231 Difference]: Finished difference. Result has 385 places, 441 transitions, 6469 flow [2024-06-27 21:57:48,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6354, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6469, PETRI_PLACES=385, PETRI_TRANSITIONS=441} [2024-06-27 21:57:48,600 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 336 predicate places. [2024-06-27 21:57:48,600 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 441 transitions, 6469 flow [2024-06-27 21:57:48,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:48,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:48,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:48,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:57:48,601 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:48,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash -515114189, now seen corresponding path program 23 times [2024-06-27 21:57:48,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:48,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843940104] [2024-06-27 21:57:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:48,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:48,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:48,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843940104] [2024-06-27 21:57:48,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843940104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:48,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:48,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:48,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617784044] [2024-06-27 21:57:48,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:48,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:48,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:48,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:48,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:48,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:57:48,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 441 transitions, 6469 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:48,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:48,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:57:48,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:51,115 INFO L124 PetriNetUnfolderBase]: 6888/11632 cut-off events. [2024-06-27 21:57:51,115 INFO L125 PetriNetUnfolderBase]: For 620757/621058 co-relation queries the response was YES. [2024-06-27 21:57:51,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71770 conditions, 11632 events. 6888/11632 cut-off events. For 620757/621058 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 91777 event pairs, 1770 based on Foata normal form. 37/11341 useless extension candidates. Maximal degree in co-relation 71604. Up to 6524 conditions per place. [2024-06-27 21:57:51,250 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 318 selfloop transitions, 144 changer transitions 0/487 dead transitions. [2024-06-27 21:57:51,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 487 transitions, 8026 flow [2024-06-27 21:57:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:57:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:57:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-27 21:57:51,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-27 21:57:51,251 INFO L175 Difference]: Start difference. First operand has 385 places, 441 transitions, 6469 flow. Second operand 7 states and 217 transitions. [2024-06-27 21:57:51,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 487 transitions, 8026 flow [2024-06-27 21:57:54,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 487 transitions, 7956 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:57:54,606 INFO L231 Difference]: Finished difference. Result has 387 places, 442 transitions, 6716 flow [2024-06-27 21:57:54,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6399, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6716, PETRI_PLACES=387, PETRI_TRANSITIONS=442} [2024-06-27 21:57:54,607 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 338 predicate places. [2024-06-27 21:57:54,607 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 442 transitions, 6716 flow [2024-06-27 21:57:54,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:54,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:54,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:54,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:57:54,608 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:54,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:54,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1172542019, now seen corresponding path program 24 times [2024-06-27 21:57:54,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:54,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61580967] [2024-06-27 21:57:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:54,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:54,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:54,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61580967] [2024-06-27 21:57:54,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61580967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:54,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:54,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:54,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604792831] [2024-06-27 21:57:54,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:54,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:54,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:54,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:54,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:54,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:57:54,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 442 transitions, 6716 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:54,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:54,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:57:54,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:57,499 INFO L124 PetriNetUnfolderBase]: 7145/12501 cut-off events. [2024-06-27 21:57:57,499 INFO L125 PetriNetUnfolderBase]: For 795580/795900 co-relation queries the response was YES. [2024-06-27 21:57:57,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75379 conditions, 12501 events. 7145/12501 cut-off events. For 795580/795900 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 102744 event pairs, 2511 based on Foata normal form. 83/12285 useless extension candidates. Maximal degree in co-relation 75212. Up to 9369 conditions per place. [2024-06-27 21:57:57,639 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 332 selfloop transitions, 134 changer transitions 0/491 dead transitions. [2024-06-27 21:57:57,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 491 transitions, 7836 flow [2024-06-27 21:57:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:57:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:57:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2024-06-27 21:57:57,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6567901234567901 [2024-06-27 21:57:57,640 INFO L175 Difference]: Start difference. First operand has 387 places, 442 transitions, 6716 flow. Second operand 9 states and 266 transitions. [2024-06-27 21:57:57,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 491 transitions, 7836 flow [2024-06-27 21:58:01,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 491 transitions, 7349 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:58:01,271 INFO L231 Difference]: Finished difference. Result has 389 places, 443 transitions, 6541 flow [2024-06-27 21:58:01,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6233, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6541, PETRI_PLACES=389, PETRI_TRANSITIONS=443} [2024-06-27 21:58:01,272 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 340 predicate places. [2024-06-27 21:58:01,272 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 443 transitions, 6541 flow [2024-06-27 21:58:01,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:01,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:01,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:01,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:58:01,272 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:58:01,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1806271693, now seen corresponding path program 25 times [2024-06-27 21:58:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:01,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140533199] [2024-06-27 21:58:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:01,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:01,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140533199] [2024-06-27 21:58:01,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140533199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:58:01,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:58:01,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:58:01,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560414683] [2024-06-27 21:58:01,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:58:01,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:58:01,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:01,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:58:01,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:58:01,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:58:01,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 443 transitions, 6541 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:01,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:01,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:58:01,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:04,073 INFO L124 PetriNetUnfolderBase]: 7393/12761 cut-off events. [2024-06-27 21:58:04,073 INFO L125 PetriNetUnfolderBase]: For 780861/781203 co-relation queries the response was YES. [2024-06-27 21:58:04,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75503 conditions, 12761 events. 7393/12761 cut-off events. For 780861/781203 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 104301 event pairs, 2256 based on Foata normal form. 79/12503 useless extension candidates. Maximal degree in co-relation 75337. Up to 7584 conditions per place. [2024-06-27 21:58:04,223 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 338 selfloop transitions, 139 changer transitions 0/502 dead transitions. [2024-06-27 21:58:04,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 502 transitions, 7963 flow [2024-06-27 21:58:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:58:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:58:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 275 transitions. [2024-06-27 21:58:04,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6790123456790124 [2024-06-27 21:58:04,224 INFO L175 Difference]: Start difference. First operand has 389 places, 443 transitions, 6541 flow. Second operand 9 states and 275 transitions. [2024-06-27 21:58:04,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 502 transitions, 7963 flow [2024-06-27 21:58:08,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 502 transitions, 7691 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:58:08,600 INFO L231 Difference]: Finished difference. Result has 391 places, 444 transitions, 6583 flow [2024-06-27 21:58:08,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6273, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6583, PETRI_PLACES=391, PETRI_TRANSITIONS=444} [2024-06-27 21:58:08,600 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 342 predicate places. [2024-06-27 21:58:08,600 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 444 transitions, 6583 flow [2024-06-27 21:58:08,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:08,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:08,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:08,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:58:08,601 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:58:08,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1606822033, now seen corresponding path program 26 times [2024-06-27 21:58:08,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:08,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198834530] [2024-06-27 21:58:08,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:08,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:08,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:08,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198834530] [2024-06-27 21:58:08,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198834530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:58:08,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:58:08,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:58:08,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893206131] [2024-06-27 21:58:08,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:58:08,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:58:08,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:08,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:58:08,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:58:08,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:58:08,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 444 transitions, 6583 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:08,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:08,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:58:08,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:11,436 INFO L124 PetriNetUnfolderBase]: 7690/13460 cut-off events. [2024-06-27 21:58:11,436 INFO L125 PetriNetUnfolderBase]: For 814912/815293 co-relation queries the response was YES. [2024-06-27 21:58:11,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78610 conditions, 13460 events. 7690/13460 cut-off events. For 814912/815293 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 112118 event pairs, 2825 based on Foata normal form. 84/13196 useless extension candidates. Maximal degree in co-relation 78443. Up to 10198 conditions per place. [2024-06-27 21:58:11,602 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 328 selfloop transitions, 140 changer transitions 0/493 dead transitions. [2024-06-27 21:58:11,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 493 transitions, 7703 flow [2024-06-27 21:58:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:58:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:58:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 287 transitions. [2024-06-27 21:58:11,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6377777777777778 [2024-06-27 21:58:11,603 INFO L175 Difference]: Start difference. First operand has 391 places, 444 transitions, 6583 flow. Second operand 10 states and 287 transitions. [2024-06-27 21:58:11,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 493 transitions, 7703 flow [2024-06-27 21:58:16,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 493 transitions, 7377 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 21:58:16,893 INFO L231 Difference]: Finished difference. Result has 392 places, 445 transitions, 6579 flow [2024-06-27 21:58:16,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6259, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6579, PETRI_PLACES=392, PETRI_TRANSITIONS=445} [2024-06-27 21:58:16,893 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 343 predicate places. [2024-06-27 21:58:16,893 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 445 transitions, 6579 flow [2024-06-27 21:58:16,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:16,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:16,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:16,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:58:16,894 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:58:16,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash 58003533, now seen corresponding path program 27 times [2024-06-27 21:58:16,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:16,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730060513] [2024-06-27 21:58:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:16,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:17,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730060513] [2024-06-27 21:58:17,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730060513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:58:17,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:58:17,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:58:17,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151759642] [2024-06-27 21:58:17,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:58:17,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:58:17,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:17,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:58:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:58:17,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:58:17,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 445 transitions, 6579 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:17,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:17,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:58:17,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:19,873 INFO L124 PetriNetUnfolderBase]: 7686/13049 cut-off events. [2024-06-27 21:58:19,874 INFO L125 PetriNetUnfolderBase]: For 622109/622508 co-relation queries the response was YES. [2024-06-27 21:58:19,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76831 conditions, 13049 events. 7686/13049 cut-off events. For 622109/622508 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 105541 event pairs, 2652 based on Foata normal form. 28/12595 useless extension candidates. Maximal degree in co-relation 76665. Up to 11147 conditions per place. [2024-06-27 21:58:20,025 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 395 selfloop transitions, 65 changer transitions 0/485 dead transitions. [2024-06-27 21:58:20,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 485 transitions, 7627 flow [2024-06-27 21:58:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:58:20,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:58:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 21:58:20,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793650793650794 [2024-06-27 21:58:20,026 INFO L175 Difference]: Start difference. First operand has 392 places, 445 transitions, 6579 flow. Second operand 7 states and 214 transitions. [2024-06-27 21:58:20,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 485 transitions, 7627 flow [2024-06-27 21:58:24,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 485 transitions, 7337 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 21:58:24,114 INFO L231 Difference]: Finished difference. Result has 390 places, 445 transitions, 6431 flow [2024-06-27 21:58:24,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6431, PETRI_PLACES=390, PETRI_TRANSITIONS=445} [2024-06-27 21:58:24,115 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 341 predicate places. [2024-06-27 21:58:24,115 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 445 transitions, 6431 flow [2024-06-27 21:58:24,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:24,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:24,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:24,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:58:24,115 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:58:24,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash -514698479, now seen corresponding path program 28 times [2024-06-27 21:58:24,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:24,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196443403] [2024-06-27 21:58:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:24,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:24,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:24,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196443403] [2024-06-27 21:58:24,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196443403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:58:24,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:58:24,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:58:24,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119305034] [2024-06-27 21:58:24,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:58:24,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:58:24,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:24,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:58:24,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:58:24,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:58:24,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 445 transitions, 6431 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:24,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:24,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:58:24,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:26,987 INFO L124 PetriNetUnfolderBase]: 7719/13501 cut-off events. [2024-06-27 21:58:26,987 INFO L125 PetriNetUnfolderBase]: For 611019/611360 co-relation queries the response was YES. [2024-06-27 21:58:27,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77184 conditions, 13501 events. 7719/13501 cut-off events. For 611019/611360 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 112023 event pairs, 3305 based on Foata normal form. 15/13154 useless extension candidates. Maximal degree in co-relation 77018. Up to 11102 conditions per place. [2024-06-27 21:58:27,383 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 426 selfloop transitions, 32 changer transitions 0/483 dead transitions. [2024-06-27 21:58:27,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 483 transitions, 7509 flow [2024-06-27 21:58:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:58:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:58:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 21:58:27,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 21:58:27,384 INFO L175 Difference]: Start difference. First operand has 390 places, 445 transitions, 6431 flow. Second operand 7 states and 202 transitions. [2024-06-27 21:58:27,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 483 transitions, 7509 flow [2024-06-27 21:58:31,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 483 transitions, 7323 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:58:31,391 INFO L231 Difference]: Finished difference. Result has 391 places, 446 transitions, 6337 flow [2024-06-27 21:58:31,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6337, PETRI_PLACES=391, PETRI_TRANSITIONS=446} [2024-06-27 21:58:31,392 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 342 predicate places. [2024-06-27 21:58:31,392 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 446 transitions, 6337 flow [2024-06-27 21:58:31,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:31,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:31,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:31,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:58:31,392 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:58:31,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:31,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2125674419, now seen corresponding path program 29 times [2024-06-27 21:58:31,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:31,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374151832] [2024-06-27 21:58:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:31,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:31,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:31,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374151832] [2024-06-27 21:58:31,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374151832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:58:31,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:58:31,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:58:31,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37394847] [2024-06-27 21:58:31,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:58:31,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:58:31,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:31,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:58:31,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:58:31,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 21:58:31,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 446 transitions, 6337 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:31,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:31,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 21:58:31,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand