./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/thin002_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/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/thin002_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:02:08,071 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:02:08,168 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:02:08,173 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:02:08,174 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:02:08,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:02:08,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:02:08,208 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:02:08,209 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:02:08,212 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:02:08,212 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:02:08,213 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:02:08,214 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:02:08,215 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:02:08,215 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:02:08,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:02:08,216 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:02:08,216 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:02:08,216 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:02:08,216 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:02:08,217 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:02:08,217 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:02:08,217 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:02:08,218 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:02:08,218 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:02:08,218 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:02:08,218 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:02:08,219 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:02:08,219 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:02:08,219 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:02:08,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:02:08,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:02:08,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:02:08,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:02:08,221 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:02:08,221 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:02:08,222 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:02:08,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:02:08,222 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:02:08,222 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:02:08,222 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:02:08,223 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:02:08,223 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:02:08,223 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:02:08,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:02:08,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:02:08,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:02:08,556 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:02:08,556 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:02:08,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 23:02:09,735 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:02:09,958 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:02:09,959 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 23:02:09,978 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92d0cc9b0/4631737692804f128365f20e3934adb1/FLAGdc5aee908 [2024-06-27 23:02:09,994 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92d0cc9b0/4631737692804f128365f20e3934adb1 [2024-06-27 23:02:09,995 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:02:09,996 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:02:09,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 23:02:10,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:02:10,095 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:02:10,096 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:02:10,096 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:02:10,101 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:02:10,102 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:02:09" (1/2) ... [2024-06-27 23:02:10,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57aceeac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:02:10, skipping insertion in model container [2024-06-27 23:02:10,103 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:02:09" (1/2) ... [2024-06-27 23:02:10,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4eef404d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:02:10, skipping insertion in model container [2024-06-27 23:02:10,108 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:02:10" (2/2) ... [2024-06-27 23:02:10,109 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57aceeac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:02:10, skipping insertion in model container [2024-06-27 23:02:10,109 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:02:10" (2/2) ... [2024-06-27 23:02:10,109 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:02:10,143 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:02:10,144 INFO L97 edCorrectnessWitness]: Location invariant before [L805-L805] ! multithreaded || (((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )a >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-27 23:02:10,145 INFO L97 edCorrectnessWitness]: Location invariant before [L808-L808] ! multithreaded || (((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )a >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-27 23:02:10,145 INFO L97 edCorrectnessWitness]: Location invariant before [L807-L807] ! multithreaded || (((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )a >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-27 23:02:10,145 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ! multithreaded || (((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )a >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-27 23:02:10,145 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:02:10,146 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-27 23:02:10,190 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:02:10,569 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:02:10,582 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:02:10,730 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:02:10,766 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:02:10,766 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:02:10 WrapperNode [2024-06-27 23:02:10,767 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:02:10,768 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:02:10,768 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:02:10,768 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:02:10,775 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,808 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,843 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-06-27 23:02:10,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:02:10,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:02:10,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:02:10,847 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:02:10,857 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,857 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,869 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,894 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 23:02:10,894 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,895 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,924 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,926 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,927 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,928 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,930 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:02:10,931 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:02:10,931 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:02:10,931 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:02:10,932 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 11:02:10" (1/1) ... [2024-06-27 23:02:10,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:02:10,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:02:11,026 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 23:02:11,059 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 23:02:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:02:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:02:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:02:11,086 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:02:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:02:11,087 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:02:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:02:11,087 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:02:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 23:02:11,088 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 23:02:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:02:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:02:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:02:11,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:02:11,090 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 23:02:11,241 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:02:11,242 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:02:11,444 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:02:11,445 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:02:11,568 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:02:11,568 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:02:11,569 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:02:11 BoogieIcfgContainer [2024-06-27 23:02:11,569 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:02:11,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:02:11,571 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:02:11,574 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:02:11,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:02:09" (1/4) ... [2024-06-27 23:02:11,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d60c710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:02:11, skipping insertion in model container [2024-06-27 23:02:11,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:02:10" (2/4) ... [2024-06-27 23:02:11,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d60c710 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:02:11, skipping insertion in model container [2024-06-27 23:02:11,575 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 11:02:10" (3/4) ... [2024-06-27 23:02:11,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d60c710 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:02:11, skipping insertion in model container [2024-06-27 23:02:11,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:02:11" (4/4) ... [2024-06-27 23:02:11,577 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 23:02:11,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:02:11,594 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 23:02:11,594 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:02:11,650 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:02:11,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-27 23:02:11,702 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-27 23:02:11,702 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:02:11,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:02:11,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-27 23:02:11,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-27 23:02:11,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:02:11,722 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;@4446ff11, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:02:11,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 23:02:11,725 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:02:11,725 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:02:11,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:02:11,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:11,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:02:11,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:11,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:11,731 INFO L85 PathProgramCache]: Analyzing trace with hash 237074108, now seen corresponding path program 1 times [2024-06-27 23:02:11,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:11,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082051671] [2024-06-27 23:02:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:11,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:12,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:12,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082051671] [2024-06-27 23:02:12,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082051671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:12,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:12,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:02:12,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012592063] [2024-06-27 23:02:12,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:12,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:02:12,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:12,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:02:12,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:02:12,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2024-06-27 23:02:12,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 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 23:02:12,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:12,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2024-06-27 23:02:12,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:12,996 INFO L124 PetriNetUnfolderBase]: 2723/4077 cut-off events. [2024-06-27 23:02:12,997 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-06-27 23:02:13,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8077 conditions, 4077 events. 2723/4077 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22522 event pairs, 1898 based on Foata normal form. 1/3991 useless extension candidates. Maximal degree in co-relation 8064. Up to 3813 conditions per place. [2024-06-27 23:02:13,036 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 37 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-27 23:02:13,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 215 flow [2024-06-27 23:02:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:02:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:02:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-06-27 23:02:13,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7124183006535948 [2024-06-27 23:02:13,050 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 109 transitions. [2024-06-27 23:02:13,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 215 flow [2024-06-27 23:02:13,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:13,060 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-27 23:02:13,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-27 23:02:13,065 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-27 23:02:13,065 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-27 23:02:13,066 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 23:02:13,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:13,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:13,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:02:13,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:13,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:13,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1772714873, now seen corresponding path program 1 times [2024-06-27 23:02:13,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:13,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023242721] [2024-06-27 23:02:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:13,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:13,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:13,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023242721] [2024-06-27 23:02:13,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023242721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:13,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:13,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:02:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139019851] [2024-06-27 23:02:13,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:13,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:02:13,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:13,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:02:13,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:02:13,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:13,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:13,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:13,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:13,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:14,095 INFO L124 PetriNetUnfolderBase]: 4389/6481 cut-off events. [2024-06-27 23:02:14,095 INFO L125 PetriNetUnfolderBase]: For 1055/1075 co-relation queries the response was YES. [2024-06-27 23:02:14,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14771 conditions, 6481 events. 4389/6481 cut-off events. For 1055/1075 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 36508 event pairs, 2308 based on Foata normal form. 10/6482 useless extension candidates. Maximal degree in co-relation 14759. Up to 6039 conditions per place. [2024-06-27 23:02:14,151 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 54 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-06-27 23:02:14,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 338 flow [2024-06-27 23:02:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:02:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:02:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-06-27 23:02:14,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813725490196079 [2024-06-27 23:02:14,157 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 139 transitions. [2024-06-27 23:02:14,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 338 flow [2024-06-27 23:02:14,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:02:14,162 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 200 flow [2024-06-27 23:02:14,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-27 23:02:14,163 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-06-27 23:02:14,164 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 200 flow [2024-06-27 23:02:14,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:14,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:14,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:14,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:02:14,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:14,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:14,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1522984968, now seen corresponding path program 1 times [2024-06-27 23:02:14,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:14,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627076311] [2024-06-27 23:02:14,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:14,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:14,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:14,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627076311] [2024-06-27 23:02:14,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627076311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:14,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:14,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:02:14,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929079746] [2024-06-27 23:02:14,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:14,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:02:14,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:14,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:02:14,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:02:14,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:14,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 200 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 23:02:14,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:14,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:14,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:15,195 INFO L124 PetriNetUnfolderBase]: 4373/6453 cut-off events. [2024-06-27 23:02:15,196 INFO L125 PetriNetUnfolderBase]: For 3044/3123 co-relation queries the response was YES. [2024-06-27 23:02:15,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16579 conditions, 6453 events. 4373/6453 cut-off events. For 3044/3123 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 36299 event pairs, 1831 based on Foata normal form. 32/6476 useless extension candidates. Maximal degree in co-relation 16564. Up to 5973 conditions per place. [2024-06-27 23:02:15,251 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 61 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-06-27 23:02:15,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 430 flow [2024-06-27 23:02:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:02:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:02:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2024-06-27 23:02:15,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2024-06-27 23:02:15,256 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 200 flow. Second operand 5 states and 168 transitions. [2024-06-27 23:02:15,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 430 flow [2024-06-27 23:02:15,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 426 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 23:02:15,262 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 246 flow [2024-06-27 23:02:15,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-27 23:02:15,263 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-27 23:02:15,264 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 246 flow [2024-06-27 23:02:15,264 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 23:02:15,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:15,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:15,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:02:15,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:15,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:15,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1039655761, now seen corresponding path program 1 times [2024-06-27 23:02:15,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:15,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551288069] [2024-06-27 23:02:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:15,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:15,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:15,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551288069] [2024-06-27 23:02:15,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551288069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:15,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:15,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:02:15,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252242143] [2024-06-27 23:02:15,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:15,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:02:15,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:02:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:02:15,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:15,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:15,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:15,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:15,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:16,308 INFO L124 PetriNetUnfolderBase]: 4310/6334 cut-off events. [2024-06-27 23:02:16,308 INFO L125 PetriNetUnfolderBase]: For 5513/5523 co-relation queries the response was YES. [2024-06-27 23:02:16,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17797 conditions, 6334 events. 4310/6334 cut-off events. For 5513/5523 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36114 event pairs, 2266 based on Foata normal form. 6/6330 useless extension candidates. Maximal degree in co-relation 17779. Up to 5934 conditions per place. [2024-06-27 23:02:16,358 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 61 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-06-27 23:02:16,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 494 flow [2024-06-27 23:02:16,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:02:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:02:16,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-27 23:02:16,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-27 23:02:16,360 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 246 flow. Second operand 4 states and 134 transitions. [2024-06-27 23:02:16,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 494 flow [2024-06-27 23:02:16,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 83 transitions, 458 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 23:02:16,368 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 323 flow [2024-06-27 23:02:16,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=323, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-27 23:02:16,370 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-06-27 23:02:16,370 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 323 flow [2024-06-27 23:02:16,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:16,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:16,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:16,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:02:16,371 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:16,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:16,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1795643978, now seen corresponding path program 1 times [2024-06-27 23:02:16,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:16,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583483766] [2024-06-27 23:02:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:16,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:16,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:16,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583483766] [2024-06-27 23:02:16,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583483766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:16,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:16,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:02:16,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437556076] [2024-06-27 23:02:16,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:16,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:02:16,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:16,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:02:16,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:02:16,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:16,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 323 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:16,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:16,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:16,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:17,359 INFO L124 PetriNetUnfolderBase]: 5207/7676 cut-off events. [2024-06-27 23:02:17,360 INFO L125 PetriNetUnfolderBase]: For 11019/11281 co-relation queries the response was YES. [2024-06-27 23:02:17,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23680 conditions, 7676 events. 5207/7676 cut-off events. For 11019/11281 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44169 event pairs, 2250 based on Foata normal form. 57/7678 useless extension candidates. Maximal degree in co-relation 23660. Up to 7050 conditions per place. [2024-06-27 23:02:17,441 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 66 selfloop transitions, 25 changer transitions 0/104 dead transitions. [2024-06-27 23:02:17,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 659 flow [2024-06-27 23:02:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:02:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:02:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 172 transitions. [2024-06-27 23:02:17,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6745098039215687 [2024-06-27 23:02:17,447 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 323 flow. Second operand 5 states and 172 transitions. [2024-06-27 23:02:17,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 659 flow [2024-06-27 23:02:17,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 651 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 23:02:17,462 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 436 flow [2024-06-27 23:02:17,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2024-06-27 23:02:17,465 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2024-06-27 23:02:17,465 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 436 flow [2024-06-27 23:02:17,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:17,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:17,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:17,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:02:17,466 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:17,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash 738796918, now seen corresponding path program 2 times [2024-06-27 23:02:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:17,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652494782] [2024-06-27 23:02:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:17,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:17,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:17,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652494782] [2024-06-27 23:02:17,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652494782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:17,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:17,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:02:17,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745690675] [2024-06-27 23:02:17,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:17,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:02:17,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:17,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:02:17,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:02:17,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:17,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 436 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:17,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:17,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:17,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:18,584 INFO L124 PetriNetUnfolderBase]: 5198/7664 cut-off events. [2024-06-27 23:02:18,585 INFO L125 PetriNetUnfolderBase]: For 17217/17499 co-relation queries the response was YES. [2024-06-27 23:02:18,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26018 conditions, 7664 events. 5198/7664 cut-off events. For 17217/17499 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44083 event pairs, 2250 based on Foata normal form. 65/7676 useless extension candidates. Maximal degree in co-relation 25995. Up to 7056 conditions per place. [2024-06-27 23:02:18,642 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 60 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-27 23:02:18,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 652 flow [2024-06-27 23:02:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:02:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:02:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-06-27 23:02:18,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813725490196079 [2024-06-27 23:02:18,645 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 436 flow. Second operand 4 states and 139 transitions. [2024-06-27 23:02:18,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 652 flow [2024-06-27 23:02:18,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 609 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 23:02:18,660 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 453 flow [2024-06-27 23:02:18,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-27 23:02:18,663 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-27 23:02:18,663 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 453 flow [2024-06-27 23:02:18,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:18,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:18,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:18,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:02:18,664 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:18,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash 458586734, now seen corresponding path program 1 times [2024-06-27 23:02:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:18,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642829728] [2024-06-27 23:02:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:18,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:18,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:18,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642829728] [2024-06-27 23:02:18,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642829728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:18,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:18,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:02:18,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549952116] [2024-06-27 23:02:18,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:18,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:02:18,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:18,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:02:18,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:02:18,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:18,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:18,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:18,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:18,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:19,644 INFO L124 PetriNetUnfolderBase]: 4317/6352 cut-off events. [2024-06-27 23:02:19,645 INFO L125 PetriNetUnfolderBase]: For 15952/15988 co-relation queries the response was YES. [2024-06-27 23:02:19,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22022 conditions, 6352 events. 4317/6352 cut-off events. For 15952/15988 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36240 event pairs, 2074 based on Foata normal form. 19/6359 useless extension candidates. Maximal degree in co-relation 21997. Up to 5913 conditions per place. [2024-06-27 23:02:19,701 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 77 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-27 23:02:19,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 726 flow [2024-06-27 23:02:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:02:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:02:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-27 23:02:19,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6431372549019608 [2024-06-27 23:02:19,703 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 453 flow. Second operand 5 states and 164 transitions. [2024-06-27 23:02:19,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 726 flow [2024-06-27 23:02:19,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 102 transitions, 684 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:02:19,716 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 477 flow [2024-06-27 23:02:19,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=477, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-27 23:02:19,718 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2024-06-27 23:02:19,718 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 477 flow [2024-06-27 23:02:19,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:19,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:19,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:19,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:02:19,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:19,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:19,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1080064308, now seen corresponding path program 1 times [2024-06-27 23:02:19,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:19,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678135691] [2024-06-27 23:02:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:19,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:20,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:20,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678135691] [2024-06-27 23:02:20,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678135691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:20,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:20,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:20,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868746449] [2024-06-27 23:02:20,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:20,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:20,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:20,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:20,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:20,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:20,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 477 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 23:02:20,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:20,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:20,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:20,831 INFO L124 PetriNetUnfolderBase]: 5487/8007 cut-off events. [2024-06-27 23:02:20,831 INFO L125 PetriNetUnfolderBase]: For 24555/24726 co-relation queries the response was YES. [2024-06-27 23:02:20,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28817 conditions, 8007 events. 5487/8007 cut-off events. For 24555/24726 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 45383 event pairs, 2351 based on Foata normal form. 40/8023 useless extension candidates. Maximal degree in co-relation 28791. Up to 7366 conditions per place. [2024-06-27 23:02:20,905 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 96 selfloop transitions, 27 changer transitions 0/133 dead transitions. [2024-06-27 23:02:20,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 993 flow [2024-06-27 23:02:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:02:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:02:20,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-27 23:02:20,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6503267973856209 [2024-06-27 23:02:20,908 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 477 flow. Second operand 6 states and 199 transitions. [2024-06-27 23:02:20,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 993 flow [2024-06-27 23:02:20,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 133 transitions, 953 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 23:02:20,932 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 665 flow [2024-06-27 23:02:20,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=665, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2024-06-27 23:02:20,935 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-06-27 23:02:20,935 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 665 flow [2024-06-27 23:02:20,935 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 23:02:20,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:20,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:20,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:02:20,936 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:20,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1427875008, now seen corresponding path program 2 times [2024-06-27 23:02:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:20,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283788390] [2024-06-27 23:02:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:21,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:21,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283788390] [2024-06-27 23:02:21,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283788390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:21,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:21,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:21,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263436386] [2024-06-27 23:02:21,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:21,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:21,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:21,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:21,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:21,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 665 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 23:02:21,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:21,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:21,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:21,993 INFO L124 PetriNetUnfolderBase]: 5509/8053 cut-off events. [2024-06-27 23:02:21,993 INFO L125 PetriNetUnfolderBase]: For 32033/32350 co-relation queries the response was YES. [2024-06-27 23:02:22,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31088 conditions, 8053 events. 5509/8053 cut-off events. For 32033/32350 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 45641 event pairs, 2329 based on Foata normal form. 81/8117 useless extension candidates. Maximal degree in co-relation 31059. Up to 7419 conditions per place. [2024-06-27 23:02:22,065 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 110 selfloop transitions, 26 changer transitions 0/146 dead transitions. [2024-06-27 23:02:22,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 146 transitions, 1162 flow [2024-06-27 23:02:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-27 23:02:22,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358543417366946 [2024-06-27 23:02:22,069 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 665 flow. Second operand 7 states and 227 transitions. [2024-06-27 23:02:22,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 146 transitions, 1162 flow [2024-06-27 23:02:22,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 146 transitions, 1108 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 23:02:22,100 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 741 flow [2024-06-27 23:02:22,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=741, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-27 23:02:22,101 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-27 23:02:22,101 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 741 flow [2024-06-27 23:02:22,102 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 23:02:22,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:22,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:22,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:02:22,102 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:22,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1427869428, now seen corresponding path program 3 times [2024-06-27 23:02:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:22,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111069703] [2024-06-27 23:02:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:22,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:22,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:22,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111069703] [2024-06-27 23:02:22,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111069703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:22,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:22,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:22,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420229868] [2024-06-27 23:02:22,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:22,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:22,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:22,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:22,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:22,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:22,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 741 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 23:02:22,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:22,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:22,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:23,086 INFO L124 PetriNetUnfolderBase]: 5500/8033 cut-off events. [2024-06-27 23:02:23,086 INFO L125 PetriNetUnfolderBase]: For 36437/36676 co-relation queries the response was YES. [2024-06-27 23:02:23,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31393 conditions, 8033 events. 5500/8033 cut-off events. For 36437/36676 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 45539 event pairs, 2351 based on Foata normal form. 65/8074 useless extension candidates. Maximal degree in co-relation 31362. Up to 7410 conditions per place. [2024-06-27 23:02:23,138 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 93 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-06-27 23:02:23,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 1054 flow [2024-06-27 23:02:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:02:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:02:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-27 23:02:23,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6549019607843137 [2024-06-27 23:02:23,140 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 741 flow. Second operand 5 states and 167 transitions. [2024-06-27 23:02:23,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 1054 flow [2024-06-27 23:02:23,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 128 transitions, 962 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:23,181 INFO L231 Difference]: Finished difference. Result has 85 places, 99 transitions, 710 flow [2024-06-27 23:02:23,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=710, PETRI_PLACES=85, PETRI_TRANSITIONS=99} [2024-06-27 23:02:23,182 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2024-06-27 23:02:23,182 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 99 transitions, 710 flow [2024-06-27 23:02:23,182 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 23:02:23,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:23,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:23,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:02:23,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:23,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash -763144331, now seen corresponding path program 1 times [2024-06-27 23:02:23,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:23,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760074320] [2024-06-27 23:02:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:23,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:23,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:23,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760074320] [2024-06-27 23:02:23,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760074320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:23,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:23,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:02:23,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405973884] [2024-06-27 23:02:23,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:23,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:02:23,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:23,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:02:23,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:02:23,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:23,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 99 transitions, 710 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 23:02:23,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:23,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:23,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:24,136 INFO L124 PetriNetUnfolderBase]: 4998/7361 cut-off events. [2024-06-27 23:02:24,137 INFO L125 PetriNetUnfolderBase]: For 40862/40885 co-relation queries the response was YES. [2024-06-27 23:02:24,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29609 conditions, 7361 events. 4998/7361 cut-off events. For 40862/40885 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 42725 event pairs, 2470 based on Foata normal form. 27/7357 useless extension candidates. Maximal degree in co-relation 29576. Up to 6752 conditions per place. [2024-06-27 23:02:24,194 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 99 selfloop transitions, 14 changer transitions 0/127 dead transitions. [2024-06-27 23:02:24,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 127 transitions, 1084 flow [2024-06-27 23:02:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:02:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:02:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 23:02:24,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225490196078431 [2024-06-27 23:02:24,196 INFO L175 Difference]: Start difference. First operand has 85 places, 99 transitions, 710 flow. Second operand 4 states and 127 transitions. [2024-06-27 23:02:24,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 127 transitions, 1084 flow [2024-06-27 23:02:24,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 1028 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:24,234 INFO L231 Difference]: Finished difference. Result has 86 places, 112 transitions, 833 flow [2024-06-27 23:02:24,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=833, PETRI_PLACES=86, PETRI_TRANSITIONS=112} [2024-06-27 23:02:24,235 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2024-06-27 23:02:24,235 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 112 transitions, 833 flow [2024-06-27 23:02:24,235 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 23:02:24,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:24,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:24,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:02:24,236 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:24,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:24,236 INFO L85 PathProgramCache]: Analyzing trace with hash 960174645, now seen corresponding path program 1 times [2024-06-27 23:02:24,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:24,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19434991] [2024-06-27 23:02:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:24,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:24,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:24,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19434991] [2024-06-27 23:02:24,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19434991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:24,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:24,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:24,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7851593] [2024-06-27 23:02:24,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:24,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:24,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:24,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:24,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:24,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 833 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:24,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:24,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:24,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:25,216 INFO L124 PetriNetUnfolderBase]: 6095/8923 cut-off events. [2024-06-27 23:02:25,216 INFO L125 PetriNetUnfolderBase]: For 64984/65217 co-relation queries the response was YES. [2024-06-27 23:02:25,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39578 conditions, 8923 events. 6095/8923 cut-off events. For 64984/65217 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52150 event pairs, 1804 based on Foata normal form. 62/8746 useless extension candidates. Maximal degree in co-relation 39544. Up to 7908 conditions per place. [2024-06-27 23:02:25,279 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 88 selfloop transitions, 49 changer transitions 0/158 dead transitions. [2024-06-27 23:02:25,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 158 transitions, 1339 flow [2024-06-27 23:02:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:02:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:02:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 203 transitions. [2024-06-27 23:02:25,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2024-06-27 23:02:25,281 INFO L175 Difference]: Start difference. First operand has 86 places, 112 transitions, 833 flow. Second operand 6 states and 203 transitions. [2024-06-27 23:02:25,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 158 transitions, 1339 flow [2024-06-27 23:02:25,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 158 transitions, 1329 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-27 23:02:25,337 INFO L231 Difference]: Finished difference. Result has 92 places, 118 transitions, 1005 flow [2024-06-27 23:02:25,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1005, PETRI_PLACES=92, PETRI_TRANSITIONS=118} [2024-06-27 23:02:25,338 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-27 23:02:25,338 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 118 transitions, 1005 flow [2024-06-27 23:02:25,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:25,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:25,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:25,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:02:25,338 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:25,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:25,339 INFO L85 PathProgramCache]: Analyzing trace with hash -877748299, now seen corresponding path program 2 times [2024-06-27 23:02:25,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:25,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947270731] [2024-06-27 23:02:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:25,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:25,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:25,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947270731] [2024-06-27 23:02:25,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947270731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:25,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:25,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702506226] [2024-06-27 23:02:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:25,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:25,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:25,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:25,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:25,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:25,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 118 transitions, 1005 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:25,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:25,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:25,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:26,369 INFO L124 PetriNetUnfolderBase]: 6167/9016 cut-off events. [2024-06-27 23:02:26,369 INFO L125 PetriNetUnfolderBase]: For 82085/82393 co-relation queries the response was YES. [2024-06-27 23:02:26,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42538 conditions, 9016 events. 6167/9016 cut-off events. For 82085/82393 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52585 event pairs, 2204 based on Foata normal form. 75/8849 useless extension candidates. Maximal degree in co-relation 42501. Up to 8137 conditions per place. [2024-06-27 23:02:26,431 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 91 selfloop transitions, 45 changer transitions 0/157 dead transitions. [2024-06-27 23:02:26,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 157 transitions, 1409 flow [2024-06-27 23:02:26,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:02:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:02:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-27 23:02:26,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6503267973856209 [2024-06-27 23:02:26,433 INFO L175 Difference]: Start difference. First operand has 92 places, 118 transitions, 1005 flow. Second operand 6 states and 199 transitions. [2024-06-27 23:02:26,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 157 transitions, 1409 flow [2024-06-27 23:02:26,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 157 transitions, 1325 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 23:02:26,506 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 1068 flow [2024-06-27 23:02:26,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1068, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2024-06-27 23:02:26,507 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2024-06-27 23:02:26,507 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 1068 flow [2024-06-27 23:02:26,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:26,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:26,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:26,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:02:26,508 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:26,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:26,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1314275829, now seen corresponding path program 3 times [2024-06-27 23:02:26,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:26,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232681406] [2024-06-27 23:02:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:26,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:26,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:26,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232681406] [2024-06-27 23:02:26,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232681406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:26,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:26,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:26,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422861664] [2024-06-27 23:02:26,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:26,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:26,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:26,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:26,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:26,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 1068 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:26,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:26,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:26,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:27,715 INFO L124 PetriNetUnfolderBase]: 6133/8979 cut-off events. [2024-06-27 23:02:27,715 INFO L125 PetriNetUnfolderBase]: For 89879/90187 co-relation queries the response was YES. [2024-06-27 23:02:27,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42958 conditions, 8979 events. 6133/8979 cut-off events. For 89879/90187 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52356 event pairs, 1794 based on Foata normal form. 108/8850 useless extension candidates. Maximal degree in co-relation 42919. Up to 8052 conditions per place. [2024-06-27 23:02:27,783 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 88 selfloop transitions, 41 changer transitions 0/150 dead transitions. [2024-06-27 23:02:27,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 150 transitions, 1400 flow [2024-06-27 23:02:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:02:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:02:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-06-27 23:02:27,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 23:02:27,785 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 1068 flow. Second operand 5 states and 170 transitions. [2024-06-27 23:02:27,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 150 transitions, 1400 flow [2024-06-27 23:02:27,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 150 transitions, 1283 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:27,855 INFO L231 Difference]: Finished difference. Result has 97 places, 121 transitions, 1049 flow [2024-06-27 23:02:27,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1049, PETRI_PLACES=97, PETRI_TRANSITIONS=121} [2024-06-27 23:02:27,855 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-27 23:02:27,856 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 1049 flow [2024-06-27 23:02:27,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:27,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:27,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:27,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:02:27,857 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:27,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1528957803, now seen corresponding path program 1 times [2024-06-27 23:02:27,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:27,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444601628] [2024-06-27 23:02:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:27,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:28,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:28,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444601628] [2024-06-27 23:02:28,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444601628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:28,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:28,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:28,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376026677] [2024-06-27 23:02:28,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:28,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:28,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:28,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:28,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:28,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 121 transitions, 1049 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:28,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:28,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:28,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:29,160 INFO L124 PetriNetUnfolderBase]: 6715/9772 cut-off events. [2024-06-27 23:02:29,161 INFO L125 PetriNetUnfolderBase]: For 95047/95379 co-relation queries the response was YES. [2024-06-27 23:02:29,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45970 conditions, 9772 events. 6715/9772 cut-off events. For 95047/95379 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56662 event pairs, 1908 based on Foata normal form. 117/9841 useless extension candidates. Maximal degree in co-relation 45930. Up to 8482 conditions per place. [2024-06-27 23:02:29,245 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 133 selfloop transitions, 43 changer transitions 0/188 dead transitions. [2024-06-27 23:02:29,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 188 transitions, 1759 flow [2024-06-27 23:02:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-06-27 23:02:29,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6526610644257703 [2024-06-27 23:02:29,247 INFO L175 Difference]: Start difference. First operand has 97 places, 121 transitions, 1049 flow. Second operand 7 states and 233 transitions. [2024-06-27 23:02:29,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 188 transitions, 1759 flow [2024-06-27 23:02:29,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 188 transitions, 1652 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:29,335 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1189 flow [2024-06-27 23:02:29,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2024-06-27 23:02:29,336 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-06-27 23:02:29,336 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1189 flow [2024-06-27 23:02:29,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:29,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:29,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:29,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:02:29,337 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:29,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1440392043, now seen corresponding path program 2 times [2024-06-27 23:02:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:29,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004742893] [2024-06-27 23:02:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:29,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:29,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004742893] [2024-06-27 23:02:29,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004742893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:29,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:29,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:29,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220447271] [2024-06-27 23:02:29,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:29,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:29,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:29,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:29,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:29,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1189 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:29,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:29,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:29,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:30,628 INFO L124 PetriNetUnfolderBase]: 6989/10198 cut-off events. [2024-06-27 23:02:30,628 INFO L125 PetriNetUnfolderBase]: For 112737/113129 co-relation queries the response was YES. [2024-06-27 23:02:30,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49943 conditions, 10198 events. 6989/10198 cut-off events. For 112737/113129 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 59632 event pairs, 2353 based on Foata normal form. 127/10277 useless extension candidates. Maximal degree in co-relation 49900. Up to 9096 conditions per place. [2024-06-27 23:02:30,695 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 139 selfloop transitions, 39 changer transitions 0/190 dead transitions. [2024-06-27 23:02:30,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 190 transitions, 1845 flow [2024-06-27 23:02:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:30,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-06-27 23:02:30,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6526610644257703 [2024-06-27 23:02:30,696 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1189 flow. Second operand 7 states and 233 transitions. [2024-06-27 23:02:30,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 190 transitions, 1845 flow [2024-06-27 23:02:30,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 190 transitions, 1786 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 23:02:30,776 INFO L231 Difference]: Finished difference. Result has 108 places, 137 transitions, 1295 flow [2024-06-27 23:02:30,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1295, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2024-06-27 23:02:30,777 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2024-06-27 23:02:30,778 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 1295 flow [2024-06-27 23:02:30,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:30,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:30,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:30,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:02:30,778 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:30,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:30,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1440244173, now seen corresponding path program 3 times [2024-06-27 23:02:30,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:30,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664785655] [2024-06-27 23:02:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:30,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:31,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:31,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664785655] [2024-06-27 23:02:31,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664785655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:31,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:31,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656050186] [2024-06-27 23:02:31,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:31,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:31,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:31,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 1295 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:31,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:31,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:31,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:31,899 INFO L124 PetriNetUnfolderBase]: 6935/10120 cut-off events. [2024-06-27 23:02:31,899 INFO L125 PetriNetUnfolderBase]: For 122427/122821 co-relation queries the response was YES. [2024-06-27 23:02:31,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50414 conditions, 10120 events. 6935/10120 cut-off events. For 122427/122821 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 59132 event pairs, 2358 based on Foata normal form. 133/10205 useless extension candidates. Maximal degree in co-relation 50368. Up to 9216 conditions per place. [2024-06-27 23:02:31,981 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 137 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-06-27 23:02:31,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 185 transitions, 1784 flow [2024-06-27 23:02:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:31,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:31,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-27 23:02:31,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358543417366946 [2024-06-27 23:02:31,983 INFO L175 Difference]: Start difference. First operand has 108 places, 137 transitions, 1295 flow. Second operand 7 states and 227 transitions. [2024-06-27 23:02:31,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 185 transitions, 1784 flow [2024-06-27 23:02:32,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 185 transitions, 1715 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 23:02:32,105 INFO L231 Difference]: Finished difference. Result has 112 places, 138 transitions, 1322 flow [2024-06-27 23:02:32,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1322, PETRI_PLACES=112, PETRI_TRANSITIONS=138} [2024-06-27 23:02:32,106 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-27 23:02:32,106 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 138 transitions, 1322 flow [2024-06-27 23:02:32,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:32,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:32,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:32,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:02:32,107 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:32,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:32,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2093356735, now seen corresponding path program 4 times [2024-06-27 23:02:32,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:32,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915208948] [2024-06-27 23:02:32,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:32,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:32,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:32,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915208948] [2024-06-27 23:02:32,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915208948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:32,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:32,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:32,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007762550] [2024-06-27 23:02:32,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:32,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:32,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:32,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:32,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:32,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:32,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 138 transitions, 1322 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:32,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:32,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:32,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:33,320 INFO L124 PetriNetUnfolderBase]: 6968/10191 cut-off events. [2024-06-27 23:02:33,320 INFO L125 PetriNetUnfolderBase]: For 131098/131500 co-relation queries the response was YES. [2024-06-27 23:02:33,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51080 conditions, 10191 events. 6968/10191 cut-off events. For 131098/131500 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 59592 event pairs, 2338 based on Foata normal form. 142/10295 useless extension candidates. Maximal degree in co-relation 51032. Up to 9310 conditions per place. [2024-06-27 23:02:33,402 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 152 selfloop transitions, 31 changer transitions 0/195 dead transitions. [2024-06-27 23:02:33,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 195 transitions, 1873 flow [2024-06-27 23:02:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 255 transitions. [2024-06-27 23:02:33,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 23:02:33,405 INFO L175 Difference]: Start difference. First operand has 112 places, 138 transitions, 1322 flow. Second operand 8 states and 255 transitions. [2024-06-27 23:02:33,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 195 transitions, 1873 flow [2024-06-27 23:02:33,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 195 transitions, 1801 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 23:02:33,527 INFO L231 Difference]: Finished difference. Result has 115 places, 140 transitions, 1360 flow [2024-06-27 23:02:33,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=115, PETRI_TRANSITIONS=140} [2024-06-27 23:02:33,528 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-06-27 23:02:33,528 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 140 transitions, 1360 flow [2024-06-27 23:02:33,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:33,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:33,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:33,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:02:33,529 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:33,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:33,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2087994355, now seen corresponding path program 5 times [2024-06-27 23:02:33,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:33,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242467699] [2024-06-27 23:02:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:33,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:33,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:33,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242467699] [2024-06-27 23:02:33,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242467699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:33,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:33,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:33,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875444002] [2024-06-27 23:02:33,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:33,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:33,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:33,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:33,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:33,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:33,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 140 transitions, 1360 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:33,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:33,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:33,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:34,702 INFO L124 PetriNetUnfolderBase]: 7114/10415 cut-off events. [2024-06-27 23:02:34,702 INFO L125 PetriNetUnfolderBase]: For 145189/145583 co-relation queries the response was YES. [2024-06-27 23:02:34,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53030 conditions, 10415 events. 7114/10415 cut-off events. For 145189/145583 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61207 event pairs, 2394 based on Foata normal form. 127/10496 useless extension candidates. Maximal degree in co-relation 52981. Up to 9523 conditions per place. [2024-06-27 23:02:34,794 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 141 selfloop transitions, 29 changer transitions 0/182 dead transitions. [2024-06-27 23:02:34,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 182 transitions, 1851 flow [2024-06-27 23:02:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:02:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:02:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-27 23:02:34,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 23:02:34,796 INFO L175 Difference]: Start difference. First operand has 115 places, 140 transitions, 1360 flow. Second operand 6 states and 198 transitions. [2024-06-27 23:02:34,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 182 transitions, 1851 flow [2024-06-27 23:02:34,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 182 transitions, 1779 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 23:02:34,942 INFO L231 Difference]: Finished difference. Result has 115 places, 142 transitions, 1398 flow [2024-06-27 23:02:34,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1398, PETRI_PLACES=115, PETRI_TRANSITIONS=142} [2024-06-27 23:02:34,943 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-06-27 23:02:34,943 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 142 transitions, 1398 flow [2024-06-27 23:02:34,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:34,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:34,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:34,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:02:34,944 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:34,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash 2087846485, now seen corresponding path program 6 times [2024-06-27 23:02:34,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:34,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223102054] [2024-06-27 23:02:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:34,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:35,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:35,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223102054] [2024-06-27 23:02:35,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223102054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:35,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:35,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:35,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360103986] [2024-06-27 23:02:35,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:35,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:35,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:35,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:35,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:35,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:35,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 142 transitions, 1398 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:35,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:35,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:35,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:36,292 INFO L124 PetriNetUnfolderBase]: 7075/10354 cut-off events. [2024-06-27 23:02:36,292 INFO L125 PetriNetUnfolderBase]: For 152734/153124 co-relation queries the response was YES. [2024-06-27 23:02:36,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52976 conditions, 10354 events. 7075/10354 cut-off events. For 152734/153124 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 60691 event pairs, 1958 based on Foata normal form. 141/10449 useless extension candidates. Maximal degree in co-relation 52926. Up to 9116 conditions per place. [2024-06-27 23:02:36,388 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 138 selfloop transitions, 37 changer transitions 0/187 dead transitions. [2024-06-27 23:02:36,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 187 transitions, 1891 flow [2024-06-27 23:02:36,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:02:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:02:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-06-27 23:02:36,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-27 23:02:36,390 INFO L175 Difference]: Start difference. First operand has 115 places, 142 transitions, 1398 flow. Second operand 6 states and 201 transitions. [2024-06-27 23:02:36,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 187 transitions, 1891 flow [2024-06-27 23:02:36,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 187 transitions, 1809 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:36,547 INFO L231 Difference]: Finished difference. Result has 118 places, 144 transitions, 1436 flow [2024-06-27 23:02:36,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1436, PETRI_PLACES=118, PETRI_TRANSITIONS=144} [2024-06-27 23:02:36,547 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-27 23:02:36,547 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 144 transitions, 1436 flow [2024-06-27 23:02:36,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:36,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:36,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:36,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:02:36,548 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:36,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:36,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2093571937, now seen corresponding path program 1 times [2024-06-27 23:02:36,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:36,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173971501] [2024-06-27 23:02:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:36,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:36,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:36,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173971501] [2024-06-27 23:02:36,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173971501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:36,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:36,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:36,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336374056] [2024-06-27 23:02:36,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:36,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:36,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:36,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:36,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 1436 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:36,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:36,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:36,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:38,075 INFO L124 PetriNetUnfolderBase]: 6967/10208 cut-off events. [2024-06-27 23:02:38,076 INFO L125 PetriNetUnfolderBase]: For 159681/160061 co-relation queries the response was YES. [2024-06-27 23:02:38,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52527 conditions, 10208 events. 6967/10208 cut-off events. For 159681/160061 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59792 event pairs, 2179 based on Foata normal form. 144/10314 useless extension candidates. Maximal degree in co-relation 52475. Up to 8973 conditions per place. [2024-06-27 23:02:38,145 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 154 selfloop transitions, 38 changer transitions 0/204 dead transitions. [2024-06-27 23:02:38,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 204 transitions, 1973 flow [2024-06-27 23:02:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-27 23:02:38,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6299019607843137 [2024-06-27 23:02:38,146 INFO L175 Difference]: Start difference. First operand has 118 places, 144 transitions, 1436 flow. Second operand 8 states and 257 transitions. [2024-06-27 23:02:38,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 204 transitions, 1973 flow [2024-06-27 23:02:38,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 204 transitions, 1838 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 23:02:38,286 INFO L231 Difference]: Finished difference. Result has 120 places, 145 transitions, 1376 flow [2024-06-27 23:02:38,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=120, PETRI_TRANSITIONS=145} [2024-06-27 23:02:38,286 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-06-27 23:02:38,287 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 145 transitions, 1376 flow [2024-06-27 23:02:38,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:38,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:38,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:38,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:02:38,287 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:38,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash -241083464, now seen corresponding path program 1 times [2024-06-27 23:02:38,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:38,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36604842] [2024-06-27 23:02:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:38,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:38,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:38,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36604842] [2024-06-27 23:02:38,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36604842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:38,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:38,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:02:38,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466806987] [2024-06-27 23:02:38,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:38,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:02:38,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:38,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:02:38,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:02:38,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:38,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 145 transitions, 1376 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 23:02:38,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:38,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:38,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:39,209 INFO L124 PetriNetUnfolderBase]: 5676/8380 cut-off events. [2024-06-27 23:02:39,209 INFO L125 PetriNetUnfolderBase]: For 138700/138966 co-relation queries the response was YES. [2024-06-27 23:02:39,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44542 conditions, 8380 events. 5676/8380 cut-off events. For 138700/138966 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49183 event pairs, 2029 based on Foata normal form. 32/8386 useless extension candidates. Maximal degree in co-relation 44490. Up to 7824 conditions per place. [2024-06-27 23:02:39,280 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 130 selfloop transitions, 33 changer transitions 0/176 dead transitions. [2024-06-27 23:02:39,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 176 transitions, 1944 flow [2024-06-27 23:02:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:02:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:02:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-27 23:02:39,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392156862745098 [2024-06-27 23:02:39,281 INFO L175 Difference]: Start difference. First operand has 120 places, 145 transitions, 1376 flow. Second operand 5 states and 163 transitions. [2024-06-27 23:02:39,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 176 transitions, 1944 flow [2024-06-27 23:02:39,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 1855 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 23:02:39,380 INFO L231 Difference]: Finished difference. Result has 119 places, 153 transitions, 1470 flow [2024-06-27 23:02:39,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1470, PETRI_PLACES=119, PETRI_TRANSITIONS=153} [2024-06-27 23:02:39,380 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2024-06-27 23:02:39,380 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 153 transitions, 1470 flow [2024-06-27 23:02:39,381 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 23:02:39,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:39,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:39,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:02:39,381 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:39,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash -210490184, now seen corresponding path program 2 times [2024-06-27 23:02:39,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:39,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498130973] [2024-06-27 23:02:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:39,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:39,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:39,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498130973] [2024-06-27 23:02:39,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498130973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:39,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:39,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:02:39,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538340631] [2024-06-27 23:02:39,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:39,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:02:39,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:39,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:02:39,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:02:39,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:39,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 153 transitions, 1470 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 23:02:39,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:39,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:39,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:40,476 INFO L124 PetriNetUnfolderBase]: 5669/8371 cut-off events. [2024-06-27 23:02:40,477 INFO L125 PetriNetUnfolderBase]: For 154222/154504 co-relation queries the response was YES. [2024-06-27 23:02:40,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46122 conditions, 8371 events. 5669/8371 cut-off events. For 154222/154504 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49074 event pairs, 2029 based on Foata normal form. 34/8380 useless extension candidates. Maximal degree in co-relation 46069. Up to 7826 conditions per place. [2024-06-27 23:02:40,551 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 128 selfloop transitions, 29 changer transitions 0/170 dead transitions. [2024-06-27 23:02:40,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 170 transitions, 1828 flow [2024-06-27 23:02:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:02:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:02:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-27 23:02:40,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-27 23:02:40,552 INFO L175 Difference]: Start difference. First operand has 119 places, 153 transitions, 1470 flow. Second operand 4 states and 134 transitions. [2024-06-27 23:02:40,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 170 transitions, 1828 flow [2024-06-27 23:02:40,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 170 transitions, 1735 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-27 23:02:40,679 INFO L231 Difference]: Finished difference. Result has 122 places, 153 transitions, 1451 flow [2024-06-27 23:02:40,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1451, PETRI_PLACES=122, PETRI_TRANSITIONS=153} [2024-06-27 23:02:40,679 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-27 23:02:40,679 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 153 transitions, 1451 flow [2024-06-27 23:02:40,680 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 23:02:40,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:40,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:40,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:02:40,680 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:40,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1999758960, now seen corresponding path program 1 times [2024-06-27 23:02:40,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:40,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820719754] [2024-06-27 23:02:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:40,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:40,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:40,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820719754] [2024-06-27 23:02:40,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820719754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:40,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:40,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:02:40,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125060062] [2024-06-27 23:02:40,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:40,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:02:40,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:02:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:02:40,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:40,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 153 transitions, 1451 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 23:02:40,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:40,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:40,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:41,834 INFO L124 PetriNetUnfolderBase]: 5840/8643 cut-off events. [2024-06-27 23:02:41,834 INFO L125 PetriNetUnfolderBase]: For 160538/160593 co-relation queries the response was YES. [2024-06-27 23:02:41,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45627 conditions, 8643 events. 5840/8643 cut-off events. For 160538/160593 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 51407 event pairs, 2282 based on Foata normal form. 63/8679 useless extension candidates. Maximal degree in co-relation 45572. Up to 7977 conditions per place. [2024-06-27 23:02:41,918 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 143 selfloop transitions, 17 changer transitions 0/176 dead transitions. [2024-06-27 23:02:41,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 176 transitions, 1851 flow [2024-06-27 23:02:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:02:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:02:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-27 23:02:41,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611764705882353 [2024-06-27 23:02:41,920 INFO L175 Difference]: Start difference. First operand has 122 places, 153 transitions, 1451 flow. Second operand 5 states and 156 transitions. [2024-06-27 23:02:41,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 176 transitions, 1851 flow [2024-06-27 23:02:42,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1793 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:02:42,052 INFO L231 Difference]: Finished difference. Result has 124 places, 156 transitions, 1467 flow [2024-06-27 23:02:42,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1467, PETRI_PLACES=124, PETRI_TRANSITIONS=156} [2024-06-27 23:02:42,053 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-27 23:02:42,053 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 156 transitions, 1467 flow [2024-06-27 23:02:42,053 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 23:02:42,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:42,053 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 23:02:42,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:02:42,053 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:42,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:42,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2144125132, now seen corresponding path program 1 times [2024-06-27 23:02:42,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:42,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013063438] [2024-06-27 23:02:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:42,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:42,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:42,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013063438] [2024-06-27 23:02:42,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013063438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:42,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:42,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:42,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101586247] [2024-06-27 23:02:42,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:42,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:42,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:42,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:42,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:42,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-27 23:02:42,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 156 transitions, 1467 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 23:02:42,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:42,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-27 23:02:42,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:43,338 INFO L124 PetriNetUnfolderBase]: 7463/10908 cut-off events. [2024-06-27 23:02:43,338 INFO L125 PetriNetUnfolderBase]: For 207788/207798 co-relation queries the response was YES. [2024-06-27 23:02:43,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57861 conditions, 10908 events. 7463/10908 cut-off events. For 207788/207798 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63695 event pairs, 2649 based on Foata normal form. 10/10913 useless extension candidates. Maximal degree in co-relation 57804. Up to 10181 conditions per place. [2024-06-27 23:02:43,433 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 178 selfloop transitions, 26 changer transitions 0/212 dead transitions. [2024-06-27 23:02:43,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 212 transitions, 2257 flow [2024-06-27 23:02:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:02:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:02:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 23:02:43,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-27 23:02:43,434 INFO L175 Difference]: Start difference. First operand has 124 places, 156 transitions, 1467 flow. Second operand 6 states and 180 transitions. [2024-06-27 23:02:43,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 212 transitions, 2257 flow [2024-06-27 23:02:43,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 212 transitions, 2200 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 23:02:43,651 INFO L231 Difference]: Finished difference. Result has 130 places, 179 transitions, 1720 flow [2024-06-27 23:02:43,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1720, PETRI_PLACES=130, PETRI_TRANSITIONS=179} [2024-06-27 23:02:43,651 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-27 23:02:43,651 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 179 transitions, 1720 flow [2024-06-27 23:02:43,652 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 23:02:43,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:43,652 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 23:02:43,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:02:43,653 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:43,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:43,653 INFO L85 PathProgramCache]: Analyzing trace with hash 3712110, now seen corresponding path program 2 times [2024-06-27 23:02:43,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:43,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291646786] [2024-06-27 23:02:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:43,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:43,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:43,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291646786] [2024-06-27 23:02:43,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291646786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:43,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:43,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:43,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194173082] [2024-06-27 23:02:43,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:43,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:43,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:43,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:43,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:43,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:02:43,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 179 transitions, 1720 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:43,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:43,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:02:43,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:44,841 INFO L124 PetriNetUnfolderBase]: 7479/10932 cut-off events. [2024-06-27 23:02:44,841 INFO L125 PetriNetUnfolderBase]: For 226161/226177 co-relation queries the response was YES. [2024-06-27 23:02:44,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60283 conditions, 10932 events. 7479/10932 cut-off events. For 226161/226177 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63825 event pairs, 2654 based on Foata normal form. 9/10937 useless extension candidates. Maximal degree in co-relation 60223. Up to 10198 conditions per place. [2024-06-27 23:02:44,938 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 169 selfloop transitions, 30 changer transitions 0/208 dead transitions. [2024-06-27 23:02:44,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 208 transitions, 2334 flow [2024-06-27 23:02:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:02:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:02:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-27 23:02:44,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6039215686274509 [2024-06-27 23:02:44,940 INFO L175 Difference]: Start difference. First operand has 130 places, 179 transitions, 1720 flow. Second operand 5 states and 154 transitions. [2024-06-27 23:02:44,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 208 transitions, 2334 flow [2024-06-27 23:02:45,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 208 transitions, 2302 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-27 23:02:45,141 INFO L231 Difference]: Finished difference. Result has 136 places, 185 transitions, 1829 flow [2024-06-27 23:02:45,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1829, PETRI_PLACES=136, PETRI_TRANSITIONS=185} [2024-06-27 23:02:45,142 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-27 23:02:45,142 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 185 transitions, 1829 flow [2024-06-27 23:02:45,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:45,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:45,143 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 23:02:45,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:02:45,143 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:45,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:45,143 INFO L85 PathProgramCache]: Analyzing trace with hash 3700950, now seen corresponding path program 3 times [2024-06-27 23:02:45,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:45,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123395449] [2024-06-27 23:02:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:45,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:45,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:45,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123395449] [2024-06-27 23:02:45,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123395449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:45,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:45,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:45,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497112493] [2024-06-27 23:02:45,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:45,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:45,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:45,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:02:45,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 185 transitions, 1829 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:45,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:45,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:02:45,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:46,351 INFO L124 PetriNetUnfolderBase]: 7472/10925 cut-off events. [2024-06-27 23:02:46,351 INFO L125 PetriNetUnfolderBase]: For 241107/241127 co-relation queries the response was YES. [2024-06-27 23:02:46,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61037 conditions, 10925 events. 7472/10925 cut-off events. For 241107/241127 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63881 event pairs, 2649 based on Foata normal form. 18/10938 useless extension candidates. Maximal degree in co-relation 60973. Up to 10191 conditions per place. [2024-06-27 23:02:46,452 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 171 selfloop transitions, 31 changer transitions 0/211 dead transitions. [2024-06-27 23:02:46,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 211 transitions, 2303 flow [2024-06-27 23:02:46,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:02:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:02:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 23:02:46,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196078431372549 [2024-06-27 23:02:46,453 INFO L175 Difference]: Start difference. First operand has 136 places, 185 transitions, 1829 flow. Second operand 5 states and 158 transitions. [2024-06-27 23:02:46,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 211 transitions, 2303 flow [2024-06-27 23:02:46,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 211 transitions, 2243 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 23:02:46,723 INFO L231 Difference]: Finished difference. Result has 140 places, 185 transitions, 1845 flow [2024-06-27 23:02:46,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1845, PETRI_PLACES=140, PETRI_TRANSITIONS=185} [2024-06-27 23:02:46,724 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2024-06-27 23:02:46,724 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 185 transitions, 1845 flow [2024-06-27 23:02:46,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:46,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:46,724 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 23:02:46,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:02:46,724 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:46,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:46,725 INFO L85 PathProgramCache]: Analyzing trace with hash -936754310, now seen corresponding path program 1 times [2024-06-27 23:02:46,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:46,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417310882] [2024-06-27 23:02:46,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:46,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:46,932 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 23:02:46,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417310882] [2024-06-27 23:02:46,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417310882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:46,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:46,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:46,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135605361] [2024-06-27 23:02:46,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:46,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:46,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:46,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:46,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:46,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:46,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 185 transitions, 1845 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 23:02:46,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:46,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:46,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:47,766 INFO L124 PetriNetUnfolderBase]: 6148/8990 cut-off events. [2024-06-27 23:02:47,767 INFO L125 PetriNetUnfolderBase]: For 216254/216258 co-relation queries the response was YES. [2024-06-27 23:02:47,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51951 conditions, 8990 events. 6148/8990 cut-off events. For 216254/216258 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51769 event pairs, 2307 based on Foata normal form. 6/8992 useless extension candidates. Maximal degree in co-relation 51885. Up to 8422 conditions per place. [2024-06-27 23:02:47,849 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 188 selfloop transitions, 33 changer transitions 0/231 dead transitions. [2024-06-27 23:02:47,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 231 transitions, 2616 flow [2024-06-27 23:02:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:02:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:02:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 23:02:47,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 23:02:47,850 INFO L175 Difference]: Start difference. First operand has 140 places, 185 transitions, 1845 flow. Second operand 6 states and 187 transitions. [2024-06-27 23:02:47,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 231 transitions, 2616 flow [2024-06-27 23:02:48,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 231 transitions, 2568 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:02:48,018 INFO L231 Difference]: Finished difference. Result has 145 places, 202 transitions, 2059 flow [2024-06-27 23:02:48,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2059, PETRI_PLACES=145, PETRI_TRANSITIONS=202} [2024-06-27 23:02:48,018 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2024-06-27 23:02:48,019 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 202 transitions, 2059 flow [2024-06-27 23:02:48,019 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 23:02:48,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:48,019 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 23:02:48,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:02:48,019 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:48,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:48,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2064746374, now seen corresponding path program 2 times [2024-06-27 23:02:48,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:48,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354620314] [2024-06-27 23:02:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:48,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:48,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:48,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354620314] [2024-06-27 23:02:48,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354620314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:48,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:48,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502984645] [2024-06-27 23:02:48,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:48,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:48,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:48,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:48,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:48,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:48,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 202 transitions, 2059 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 23:02:48,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:48,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:48,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:49,199 INFO L124 PetriNetUnfolderBase]: 6164/9017 cut-off events. [2024-06-27 23:02:49,199 INFO L125 PetriNetUnfolderBase]: For 221395/221403 co-relation queries the response was YES. [2024-06-27 23:02:49,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53713 conditions, 9017 events. 6164/9017 cut-off events. For 221395/221403 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51990 event pairs, 2299 based on Foata normal form. 10/9024 useless extension candidates. Maximal degree in co-relation 53645. Up to 8457 conditions per place. [2024-06-27 23:02:49,291 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 197 selfloop transitions, 33 changer transitions 0/240 dead transitions. [2024-06-27 23:02:49,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 240 transitions, 2775 flow [2024-06-27 23:02:49,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 23:02:49,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938375350140056 [2024-06-27 23:02:49,293 INFO L175 Difference]: Start difference. First operand has 145 places, 202 transitions, 2059 flow. Second operand 7 states and 212 transitions. [2024-06-27 23:02:49,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 240 transitions, 2775 flow [2024-06-27 23:02:49,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 240 transitions, 2691 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 23:02:49,495 INFO L231 Difference]: Finished difference. Result has 151 places, 208 transitions, 2125 flow [2024-06-27 23:02:49,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2125, PETRI_PLACES=151, PETRI_TRANSITIONS=208} [2024-06-27 23:02:49,496 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 97 predicate places. [2024-06-27 23:02:49,496 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 208 transitions, 2125 flow [2024-06-27 23:02:49,496 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 23:02:49,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:49,497 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 23:02:49,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:02:49,497 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:49,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:49,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2064740794, now seen corresponding path program 3 times [2024-06-27 23:02:49,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:49,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483155300] [2024-06-27 23:02:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:49,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:49,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:49,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483155300] [2024-06-27 23:02:49,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483155300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:49,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:49,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:49,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575410775] [2024-06-27 23:02:49,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:49,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:49,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:49,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:49,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:49,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:49,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 208 transitions, 2125 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 23:02:49,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:49,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:49,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:50,695 INFO L124 PetriNetUnfolderBase]: 6157/9007 cut-off events. [2024-06-27 23:02:50,696 INFO L125 PetriNetUnfolderBase]: For 233108/233114 co-relation queries the response was YES. [2024-06-27 23:02:50,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53815 conditions, 9007 events. 6157/9007 cut-off events. For 233108/233114 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51861 event pairs, 2307 based on Foata normal form. 8/9011 useless extension candidates. Maximal degree in co-relation 53745. Up to 8450 conditions per place. [2024-06-27 23:02:50,770 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 189 selfloop transitions, 31 changer transitions 0/230 dead transitions. [2024-06-27 23:02:50,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 230 transitions, 2625 flow [2024-06-27 23:02:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:02:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:02:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-27 23:02:50,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2024-06-27 23:02:50,771 INFO L175 Difference]: Start difference. First operand has 151 places, 208 transitions, 2125 flow. Second operand 5 states and 159 transitions. [2024-06-27 23:02:50,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 230 transitions, 2625 flow [2024-06-27 23:02:50,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 230 transitions, 2515 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:50,996 INFO L231 Difference]: Finished difference. Result has 152 places, 208 transitions, 2086 flow [2024-06-27 23:02:50,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2086, PETRI_PLACES=152, PETRI_TRANSITIONS=208} [2024-06-27 23:02:50,996 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 98 predicate places. [2024-06-27 23:02:50,997 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 208 transitions, 2086 flow [2024-06-27 23:02:50,997 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 23:02:50,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:50,997 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 23:02:50,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:02:50,997 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:50,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:50,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1711749199, now seen corresponding path program 1 times [2024-06-27 23:02:50,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:50,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664483860] [2024-06-27 23:02:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:50,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:51,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:51,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664483860] [2024-06-27 23:02:51,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664483860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:51,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:51,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:02:51,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817721416] [2024-06-27 23:02:51,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:51,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:02:51,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:02:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:02:51,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:51,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 208 transitions, 2086 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:51,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:51,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:51,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:52,244 INFO L124 PetriNetUnfolderBase]: 6897/10157 cut-off events. [2024-06-27 23:02:52,244 INFO L125 PetriNetUnfolderBase]: For 318780/318947 co-relation queries the response was YES. [2024-06-27 23:02:52,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62317 conditions, 10157 events. 6897/10157 cut-off events. For 318780/318947 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 60246 event pairs, 2392 based on Foata normal form. 45/9977 useless extension candidates. Maximal degree in co-relation 62245. Up to 9062 conditions per place. [2024-06-27 23:02:52,346 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 177 selfloop transitions, 18 changer transitions 0/238 dead transitions. [2024-06-27 23:02:52,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 238 transitions, 2722 flow [2024-06-27 23:02:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:02:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:02:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-27 23:02:52,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980392156862745 [2024-06-27 23:02:52,348 INFO L175 Difference]: Start difference. First operand has 152 places, 208 transitions, 2086 flow. Second operand 4 states and 122 transitions. [2024-06-27 23:02:52,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 238 transitions, 2722 flow [2024-06-27 23:02:52,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 238 transitions, 2652 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:52,649 INFO L231 Difference]: Finished difference. Result has 153 places, 225 transitions, 2309 flow [2024-06-27 23:02:52,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2309, PETRI_PLACES=153, PETRI_TRANSITIONS=225} [2024-06-27 23:02:52,650 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2024-06-27 23:02:52,650 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 225 transitions, 2309 flow [2024-06-27 23:02:52,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:52,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:52,651 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 23:02:52,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:02:52,651 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:52,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:52,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1022527479, now seen corresponding path program 1 times [2024-06-27 23:02:52,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:52,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734705658] [2024-06-27 23:02:52,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:52,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:52,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:52,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734705658] [2024-06-27 23:02:52,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734705658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:52,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:52,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:52,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996595494] [2024-06-27 23:02:52,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:52,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:52,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:52,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:52,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:52,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:52,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 225 transitions, 2309 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 23:02:52,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:52,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:52,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:54,053 INFO L124 PetriNetUnfolderBase]: 6790/10087 cut-off events. [2024-06-27 23:02:54,054 INFO L125 PetriNetUnfolderBase]: For 345582/346168 co-relation queries the response was YES. [2024-06-27 23:02:54,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65926 conditions, 10087 events. 6790/10087 cut-off events. For 345582/346168 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 60429 event pairs, 2033 based on Foata normal form. 73/9793 useless extension candidates. Maximal degree in co-relation 65853. Up to 8986 conditions per place. [2024-06-27 23:02:54,147 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 174 selfloop transitions, 61 changer transitions 0/263 dead transitions. [2024-06-27 23:02:54,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 263 transitions, 3089 flow [2024-06-27 23:02:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:02:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:02:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-27 23:02:54,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339869281045751 [2024-06-27 23:02:54,148 INFO L175 Difference]: Start difference. First operand has 153 places, 225 transitions, 2309 flow. Second operand 6 states and 194 transitions. [2024-06-27 23:02:54,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 263 transitions, 3089 flow [2024-06-27 23:02:54,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 263 transitions, 3069 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-27 23:02:54,418 INFO L231 Difference]: Finished difference. Result has 159 places, 231 transitions, 2537 flow [2024-06-27 23:02:54,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2537, PETRI_PLACES=159, PETRI_TRANSITIONS=231} [2024-06-27 23:02:54,419 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2024-06-27 23:02:54,419 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 231 transitions, 2537 flow [2024-06-27 23:02:54,419 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 23:02:54,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:54,419 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 23:02:54,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:02:54,419 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:54,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash 247081143, now seen corresponding path program 2 times [2024-06-27 23:02:54,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:54,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522179477] [2024-06-27 23:02:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:54,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:54,650 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 23:02:54,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:54,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522179477] [2024-06-27 23:02:54,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522179477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:54,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:54,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:54,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205610015] [2024-06-27 23:02:54,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:54,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:54,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:54,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:54,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:54,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:54,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 231 transitions, 2537 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 23:02:54,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:54,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:54,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:55,755 INFO L124 PetriNetUnfolderBase]: 6833/10150 cut-off events. [2024-06-27 23:02:55,756 INFO L125 PetriNetUnfolderBase]: For 375978/376650 co-relation queries the response was YES. [2024-06-27 23:02:55,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68447 conditions, 10150 events. 6833/10150 cut-off events. For 375978/376650 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 60895 event pairs, 2203 based on Foata normal form. 58/9833 useless extension candidates. Maximal degree in co-relation 68371. Up to 9189 conditions per place. [2024-06-27 23:02:55,866 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 175 selfloop transitions, 57 changer transitions 0/260 dead transitions. [2024-06-27 23:02:55,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 260 transitions, 3129 flow [2024-06-27 23:02:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:02:55,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:02:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-27 23:02:55,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2024-06-27 23:02:55,868 INFO L175 Difference]: Start difference. First operand has 159 places, 231 transitions, 2537 flow. Second operand 6 states and 188 transitions. [2024-06-27 23:02:55,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 260 transitions, 3129 flow [2024-06-27 23:02:56,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 260 transitions, 2987 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 23:02:56,284 INFO L231 Difference]: Finished difference. Result has 163 places, 234 transitions, 2586 flow [2024-06-27 23:02:56,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2586, PETRI_PLACES=163, PETRI_TRANSITIONS=234} [2024-06-27 23:02:56,284 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2024-06-27 23:02:56,284 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 234 transitions, 2586 flow [2024-06-27 23:02:56,284 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 23:02:56,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:56,285 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 23:02:56,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:02:56,285 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:56,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:56,285 INFO L85 PathProgramCache]: Analyzing trace with hash -417547849, now seen corresponding path program 3 times [2024-06-27 23:02:56,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:56,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141911205] [2024-06-27 23:02:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:56,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:56,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141911205] [2024-06-27 23:02:56,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141911205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:56,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:56,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:56,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774491966] [2024-06-27 23:02:56,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:56,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:56,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:56,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:56,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:56,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:02:56,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 234 transitions, 2586 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 23:02:56,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:56,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:02:56,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:57,693 INFO L124 PetriNetUnfolderBase]: 6808/10117 cut-off events. [2024-06-27 23:02:57,693 INFO L125 PetriNetUnfolderBase]: For 390026/390674 co-relation queries the response was YES. [2024-06-27 23:02:57,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68305 conditions, 10117 events. 6808/10117 cut-off events. For 390026/390674 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 60475 event pairs, 2023 based on Foata normal form. 84/9830 useless extension candidates. Maximal degree in co-relation 68227. Up to 9116 conditions per place. [2024-06-27 23:02:57,794 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 178 selfloop transitions, 53 changer transitions 0/259 dead transitions. [2024-06-27 23:02:57,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 259 transitions, 3112 flow [2024-06-27 23:02:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:02:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:02:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-27 23:02:57,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 23:02:57,795 INFO L175 Difference]: Start difference. First operand has 163 places, 234 transitions, 2586 flow. Second operand 5 states and 165 transitions. [2024-06-27 23:02:57,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 259 transitions, 3112 flow [2024-06-27 23:02:58,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 259 transitions, 2951 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:58,211 INFO L231 Difference]: Finished difference. Result has 164 places, 234 transitions, 2545 flow [2024-06-27 23:02:58,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2425, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2545, PETRI_PLACES=164, PETRI_TRANSITIONS=234} [2024-06-27 23:02:58,211 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 110 predicate places. [2024-06-27 23:02:58,211 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 234 transitions, 2545 flow [2024-06-27 23:02:58,211 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 23:02:58,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:58,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:58,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:02:58,212 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:02:58,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1483325819, now seen corresponding path program 1 times [2024-06-27 23:02:58,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:58,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837165706] [2024-06-27 23:02:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:58,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:58,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837165706] [2024-06-27 23:02:58,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837165706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:58,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:58,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:58,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594128838] [2024-06-27 23:02:58,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:58,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:58,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:58,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:58,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:58,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:02:58,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 234 transitions, 2545 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 23:02:58,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:58,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:02:58,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:59,571 INFO L124 PetriNetUnfolderBase]: 7307/10733 cut-off events. [2024-06-27 23:02:59,571 INFO L125 PetriNetUnfolderBase]: For 408773/409627 co-relation queries the response was YES. [2024-06-27 23:02:59,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71229 conditions, 10733 events. 7307/10733 cut-off events. For 408773/409627 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 63702 event pairs, 2253 based on Foata normal form. 123/10438 useless extension candidates. Maximal degree in co-relation 71150. Up to 9459 conditions per place. [2024-06-27 23:02:59,684 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 171 selfloop transitions, 93 changer transitions 0/289 dead transitions. [2024-06-27 23:02:59,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 289 transitions, 3635 flow [2024-06-27 23:02:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-27 23:02:59,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6386554621848739 [2024-06-27 23:02:59,686 INFO L175 Difference]: Start difference. First operand has 164 places, 234 transitions, 2545 flow. Second operand 7 states and 228 transitions. [2024-06-27 23:02:59,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 289 transitions, 3635 flow [2024-06-27 23:03:00,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 289 transitions, 3518 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 23:03:00,093 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 2823 flow [2024-06-27 23:03:00,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2428, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2823, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2024-06-27 23:03:00,094 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 113 predicate places. [2024-06-27 23:03:00,094 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 2823 flow [2024-06-27 23:03:00,094 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 23:03:00,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:00,094 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 23:03:00,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:03:00,094 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:00,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:00,094 INFO L85 PathProgramCache]: Analyzing trace with hash -186692563, now seen corresponding path program 2 times [2024-06-27 23:03:00,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:00,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132732335] [2024-06-27 23:03:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:00,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:00,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:00,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132732335] [2024-06-27 23:03:00,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132732335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:00,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:00,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:00,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050622864] [2024-06-27 23:03:00,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:00,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:00,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:00,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:00,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:03:00,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 2823 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 23:03:00,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:00,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:03:00,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:01,714 INFO L124 PetriNetUnfolderBase]: 7304/10740 cut-off events. [2024-06-27 23:03:01,714 INFO L125 PetriNetUnfolderBase]: For 439262/440208 co-relation queries the response was YES. [2024-06-27 23:03:01,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73688 conditions, 10740 events. 7304/10740 cut-off events. For 439262/440208 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 63893 event pairs, 2223 based on Foata normal form. 167/10500 useless extension candidates. Maximal degree in co-relation 73608. Up to 9660 conditions per place. [2024-06-27 23:03:01,822 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 193 selfloop transitions, 71 changer transitions 0/289 dead transitions. [2024-06-27 23:03:01,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 289 transitions, 3552 flow [2024-06-27 23:03:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:03:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:03:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-27 23:03:01,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106442577030813 [2024-06-27 23:03:01,823 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 2823 flow. Second operand 7 states and 218 transitions. [2024-06-27 23:03:01,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 289 transitions, 3552 flow [2024-06-27 23:03:02,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 289 transitions, 3390 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-27 23:03:02,196 INFO L231 Difference]: Finished difference. Result has 172 places, 254 transitions, 2931 flow [2024-06-27 23:03:02,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2931, PETRI_PLACES=172, PETRI_TRANSITIONS=254} [2024-06-27 23:03:02,197 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 118 predicate places. [2024-06-27 23:03:02,197 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 254 transitions, 2931 flow [2024-06-27 23:03:02,197 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 23:03:02,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:02,198 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 23:03:02,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:03:02,198 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:02,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:02,198 INFO L85 PathProgramCache]: Analyzing trace with hash -255980055, now seen corresponding path program 1 times [2024-06-27 23:03:02,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:02,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071483994] [2024-06-27 23:03:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:02,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:02,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:02,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071483994] [2024-06-27 23:03:02,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071483994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:02,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:02,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:02,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201190770] [2024-06-27 23:03:02,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:02,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:02,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:02,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:02,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:02,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:02,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 254 transitions, 2931 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:02,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:02,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:02,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:03,636 INFO L124 PetriNetUnfolderBase]: 7766/11360 cut-off events. [2024-06-27 23:03:03,636 INFO L125 PetriNetUnfolderBase]: For 413491/413523 co-relation queries the response was YES. [2024-06-27 23:03:03,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73926 conditions, 11360 events. 7766/11360 cut-off events. For 413491/413523 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 66466 event pairs, 2556 based on Foata normal form. 30/11386 useless extension candidates. Maximal degree in co-relation 73844. Up to 10362 conditions per place. [2024-06-27 23:03:03,759 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 252 selfloop transitions, 63 changer transitions 0/324 dead transitions. [2024-06-27 23:03:03,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 324 transitions, 4264 flow [2024-06-27 23:03:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:03:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:03:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 219 transitions. [2024-06-27 23:03:03,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134453781512605 [2024-06-27 23:03:03,761 INFO L175 Difference]: Start difference. First operand has 172 places, 254 transitions, 2931 flow. Second operand 7 states and 219 transitions. [2024-06-27 23:03:03,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 324 transitions, 4264 flow [2024-06-27 23:03:04,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 324 transitions, 4062 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 23:03:04,286 INFO L231 Difference]: Finished difference. Result has 178 places, 279 transitions, 3238 flow [2024-06-27 23:03:04,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3238, PETRI_PLACES=178, PETRI_TRANSITIONS=279} [2024-06-27 23:03:04,287 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 124 predicate places. [2024-06-27 23:03:04,287 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 279 transitions, 3238 flow [2024-06-27 23:03:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:04,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:04,287 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 23:03:04,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:03:04,287 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:04,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:04,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1660577495, now seen corresponding path program 2 times [2024-06-27 23:03:04,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:04,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270912693] [2024-06-27 23:03:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:04,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:04,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:04,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270912693] [2024-06-27 23:03:04,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270912693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:04,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:04,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:04,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639849776] [2024-06-27 23:03:04,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:04,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:04,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:04,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:04,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:04,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:04,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 279 transitions, 3238 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:04,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:04,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:04,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:05,883 INFO L124 PetriNetUnfolderBase]: 7860/11493 cut-off events. [2024-06-27 23:03:05,883 INFO L125 PetriNetUnfolderBase]: For 443234/443269 co-relation queries the response was YES. [2024-06-27 23:03:05,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77372 conditions, 11493 events. 7860/11493 cut-off events. For 443234/443269 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 67407 event pairs, 2556 based on Foata normal form. 33/11522 useless extension candidates. Maximal degree in co-relation 77286. Up to 10451 conditions per place. [2024-06-27 23:03:05,999 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 255 selfloop transitions, 77 changer transitions 0/341 dead transitions. [2024-06-27 23:03:05,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 341 transitions, 4694 flow [2024-06-27 23:03:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:03:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:03:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 219 transitions. [2024-06-27 23:03:06,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134453781512605 [2024-06-27 23:03:06,001 INFO L175 Difference]: Start difference. First operand has 178 places, 279 transitions, 3238 flow. Second operand 7 states and 219 transitions. [2024-06-27 23:03:06,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 341 transitions, 4694 flow [2024-06-27 23:03:06,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 341 transitions, 4598 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-27 23:03:06,513 INFO L231 Difference]: Finished difference. Result has 186 places, 297 transitions, 3582 flow [2024-06-27 23:03:06,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3582, PETRI_PLACES=186, PETRI_TRANSITIONS=297} [2024-06-27 23:03:06,514 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2024-06-27 23:03:06,514 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 297 transitions, 3582 flow [2024-06-27 23:03:06,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:06,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:06,514 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 23:03:06,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:03:06,515 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:06,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:06,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1660814645, now seen corresponding path program 3 times [2024-06-27 23:03:06,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:06,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382730962] [2024-06-27 23:03:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:06,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:06,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:06,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382730962] [2024-06-27 23:03:06,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382730962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:06,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:06,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:06,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116751019] [2024-06-27 23:03:06,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:06,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:06,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:06,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:06,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:06,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:06,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 297 transitions, 3582 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:06,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:06,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:06,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:08,018 INFO L124 PetriNetUnfolderBase]: 7853/11484 cut-off events. [2024-06-27 23:03:08,019 INFO L125 PetriNetUnfolderBase]: For 464421/464458 co-relation queries the response was YES. [2024-06-27 23:03:08,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78317 conditions, 11484 events. 7853/11484 cut-off events. For 464421/464458 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 67343 event pairs, 2556 based on Foata normal form. 35/11515 useless extension candidates. Maximal degree in co-relation 78227. Up to 10444 conditions per place. [2024-06-27 23:03:08,145 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 251 selfloop transitions, 81 changer transitions 0/341 dead transitions. [2024-06-27 23:03:08,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 341 transitions, 4693 flow [2024-06-27 23:03:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:03:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:03:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 23:03:08,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6050420168067226 [2024-06-27 23:03:08,146 INFO L175 Difference]: Start difference. First operand has 186 places, 297 transitions, 3582 flow. Second operand 7 states and 216 transitions. [2024-06-27 23:03:08,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 341 transitions, 4693 flow [2024-06-27 23:03:08,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 341 transitions, 4556 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 23:03:08,685 INFO L231 Difference]: Finished difference. Result has 192 places, 300 transitions, 3667 flow [2024-06-27 23:03:08,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3449, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3667, PETRI_PLACES=192, PETRI_TRANSITIONS=300} [2024-06-27 23:03:08,685 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 138 predicate places. [2024-06-27 23:03:08,685 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 300 transitions, 3667 flow [2024-06-27 23:03:08,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:08,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:08,686 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 23:03:08,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:03:08,686 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:08,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1660577309, now seen corresponding path program 3 times [2024-06-27 23:03:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:08,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672362891] [2024-06-27 23:03:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:08,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:08,904 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 23:03:08,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:08,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672362891] [2024-06-27 23:03:08,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672362891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:08,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:08,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:08,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038958570] [2024-06-27 23:03:08,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:08,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:08,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:08,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:08,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:08,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:03:08,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 300 transitions, 3667 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 23:03:08,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:08,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:03:08,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:10,316 INFO L124 PetriNetUnfolderBase]: 7523/11066 cut-off events. [2024-06-27 23:03:10,317 INFO L125 PetriNetUnfolderBase]: For 547457/548669 co-relation queries the response was YES. [2024-06-27 23:03:10,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80744 conditions, 11066 events. 7523/11066 cut-off events. For 547457/548669 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 66066 event pairs, 2209 based on Foata normal form. 70/10749 useless extension candidates. Maximal degree in co-relation 80652. Up to 9880 conditions per place. [2024-06-27 23:03:10,447 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 216 selfloop transitions, 108 changer transitions 0/358 dead transitions. [2024-06-27 23:03:10,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 358 transitions, 4831 flow [2024-06-27 23:03:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:03:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:03:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-27 23:03:10,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5955882352941176 [2024-06-27 23:03:10,449 INFO L175 Difference]: Start difference. First operand has 192 places, 300 transitions, 3667 flow. Second operand 8 states and 243 transitions. [2024-06-27 23:03:10,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 358 transitions, 4831 flow [2024-06-27 23:03:11,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 358 transitions, 4694 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 23:03:11,208 INFO L231 Difference]: Finished difference. Result has 199 places, 320 transitions, 4082 flow [2024-06-27 23:03:11,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4082, PETRI_PLACES=199, PETRI_TRANSITIONS=320} [2024-06-27 23:03:11,209 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 145 predicate places. [2024-06-27 23:03:11,209 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 320 transitions, 4082 flow [2024-06-27 23:03:11,209 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 23:03:11,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:11,209 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 23:03:11,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:03:11,209 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:11,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:11,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1394787959, now seen corresponding path program 1 times [2024-06-27 23:03:11,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:11,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045006443] [2024-06-27 23:03:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:11,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:11,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:11,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045006443] [2024-06-27 23:03:11,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045006443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:11,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:11,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:11,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204398861] [2024-06-27 23:03:11,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:11,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:11,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:11,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:11,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:11,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:11,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 320 transitions, 4082 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:11,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:11,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:11,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:12,868 INFO L124 PetriNetUnfolderBase]: 8132/11895 cut-off events. [2024-06-27 23:03:12,868 INFO L125 PetriNetUnfolderBase]: For 531397/531419 co-relation queries the response was YES. [2024-06-27 23:03:12,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82204 conditions, 11895 events. 8132/11895 cut-off events. For 531397/531419 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 70050 event pairs, 2067 based on Foata normal form. 30/11921 useless extension candidates. Maximal degree in co-relation 82109. Up to 10767 conditions per place. [2024-06-27 23:03:12,997 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 331 selfloop transitions, 39 changer transitions 0/379 dead transitions. [2024-06-27 23:03:12,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 379 transitions, 5234 flow [2024-06-27 23:03:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:03:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:03:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-27 23:03:12,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106442577030813 [2024-06-27 23:03:12,999 INFO L175 Difference]: Start difference. First operand has 199 places, 320 transitions, 4082 flow. Second operand 7 states and 218 transitions. [2024-06-27 23:03:12,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 379 transitions, 5234 flow [2024-06-27 23:03:13,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 379 transitions, 5027 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 23:03:13,659 INFO L231 Difference]: Finished difference. Result has 205 places, 330 transitions, 4088 flow [2024-06-27 23:03:13,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4088, PETRI_PLACES=205, PETRI_TRANSITIONS=330} [2024-06-27 23:03:13,659 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 151 predicate places. [2024-06-27 23:03:13,659 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 330 transitions, 4088 flow [2024-06-27 23:03:13,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:13,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:13,660 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 23:03:13,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:03:13,660 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:13,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:13,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1660485239, now seen corresponding path program 2 times [2024-06-27 23:03:13,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:13,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785834012] [2024-06-27 23:03:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:13,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:13,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:13,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785834012] [2024-06-27 23:03:13,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785834012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:13,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:13,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:13,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136899734] [2024-06-27 23:03:13,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:13,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:13,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:13,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:13,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:13,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:13,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 330 transitions, 4088 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:13,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:13,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:13,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:15,380 INFO L124 PetriNetUnfolderBase]: 8372/12234 cut-off events. [2024-06-27 23:03:15,380 INFO L125 PetriNetUnfolderBase]: For 571741/571763 co-relation queries the response was YES. [2024-06-27 23:03:15,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85850 conditions, 12234 events. 8372/12234 cut-off events. For 571741/571763 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72222 event pairs, 2557 based on Foata normal form. 30/12260 useless extension candidates. Maximal degree in co-relation 85753. Up to 11203 conditions per place. [2024-06-27 23:03:15,517 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 335 selfloop transitions, 36 changer transitions 0/380 dead transitions. [2024-06-27 23:03:15,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 380 transitions, 5201 flow [2024-06-27 23:03:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:03:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:03:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-27 23:03:15,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022408963585434 [2024-06-27 23:03:15,518 INFO L175 Difference]: Start difference. First operand has 205 places, 330 transitions, 4088 flow. Second operand 7 states and 215 transitions. [2024-06-27 23:03:15,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 380 transitions, 5201 flow [2024-06-27 23:03:16,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 380 transitions, 5147 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 23:03:16,366 INFO L231 Difference]: Finished difference. Result has 211 places, 336 transitions, 4198 flow [2024-06-27 23:03:16,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4198, PETRI_PLACES=211, PETRI_TRANSITIONS=336} [2024-06-27 23:03:16,367 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 157 predicate places. [2024-06-27 23:03:16,367 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 336 transitions, 4198 flow [2024-06-27 23:03:16,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:16,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:16,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:16,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:03:16,368 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:16,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1660811669, now seen corresponding path program 3 times [2024-06-27 23:03:16,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:16,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007302972] [2024-06-27 23:03:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:16,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:16,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:16,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007302972] [2024-06-27 23:03:16,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007302972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:16,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:16,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:16,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127431104] [2024-06-27 23:03:16,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:16,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:16,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:16,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:16,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:16,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:16,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 336 transitions, 4198 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:16,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:16,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:16,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:18,378 INFO L124 PetriNetUnfolderBase]: 8328/12174 cut-off events. [2024-06-27 23:03:18,378 INFO L125 PetriNetUnfolderBase]: For 587648/587670 co-relation queries the response was YES. [2024-06-27 23:03:18,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85839 conditions, 12174 events. 8328/12174 cut-off events. For 587648/587670 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 71819 event pairs, 2556 based on Foata normal form. 34/12204 useless extension candidates. Maximal degree in co-relation 85739. Up to 11266 conditions per place. [2024-06-27 23:03:18,492 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 334 selfloop transitions, 33 changer transitions 0/376 dead transitions. [2024-06-27 23:03:18,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 376 transitions, 5073 flow [2024-06-27 23:03:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:03:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:03:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 23:03:18,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-27 23:03:18,493 INFO L175 Difference]: Start difference. First operand has 211 places, 336 transitions, 4198 flow. Second operand 7 states and 210 transitions. [2024-06-27 23:03:18,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 376 transitions, 5073 flow [2024-06-27 23:03:19,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 376 transitions, 5027 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 23:03:19,210 INFO L231 Difference]: Finished difference. Result has 215 places, 337 transitions, 4244 flow [2024-06-27 23:03:19,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4244, PETRI_PLACES=215, PETRI_TRANSITIONS=337} [2024-06-27 23:03:19,211 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 161 predicate places. [2024-06-27 23:03:19,211 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 337 transitions, 4244 flow [2024-06-27 23:03:19,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:19,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:19,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:19,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:03:19,212 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:19,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:19,212 INFO L85 PathProgramCache]: Analyzing trace with hash 762384793, now seen corresponding path program 4 times [2024-06-27 23:03:19,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:19,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934680988] [2024-06-27 23:03:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:19,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:19,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:19,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934680988] [2024-06-27 23:03:19,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934680988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:19,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:19,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:19,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538716901] [2024-06-27 23:03:19,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:19,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:19,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:19,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:19,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:03:19,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 337 transitions, 4244 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 23:03:19,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:19,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:03:19,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:20,988 INFO L124 PetriNetUnfolderBase]: 7940/11684 cut-off events. [2024-06-27 23:03:20,988 INFO L125 PetriNetUnfolderBase]: For 669523/670798 co-relation queries the response was YES. [2024-06-27 23:03:21,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87780 conditions, 11684 events. 7940/11684 cut-off events. For 669523/670798 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70332 event pairs, 2308 based on Foata normal form. 115/11416 useless extension candidates. Maximal degree in co-relation 87678. Up to 10312 conditions per place. [2024-06-27 23:03:21,126 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 237 selfloop transitions, 104 changer transitions 0/381 dead transitions. [2024-06-27 23:03:21,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 381 transitions, 5490 flow [2024-06-27 23:03:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:03:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:03:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-27 23:03:21,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 23:03:21,128 INFO L175 Difference]: Start difference. First operand has 215 places, 337 transitions, 4244 flow. Second operand 6 states and 198 transitions. [2024-06-27 23:03:21,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 381 transitions, 5490 flow [2024-06-27 23:03:22,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 381 transitions, 5457 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 23:03:22,149 INFO L231 Difference]: Finished difference. Result has 219 places, 345 transitions, 4568 flow [2024-06-27 23:03:22,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4211, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4568, PETRI_PLACES=219, PETRI_TRANSITIONS=345} [2024-06-27 23:03:22,150 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 165 predicate places. [2024-06-27 23:03:22,150 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 345 transitions, 4568 flow [2024-06-27 23:03:22,151 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 23:03:22,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:22,151 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 23:03:22,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:03:22,151 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:22,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:22,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1479359109, now seen corresponding path program 5 times [2024-06-27 23:03:22,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:22,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405203059] [2024-06-27 23:03:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:22,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:22,428 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 23:03:22,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:22,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405203059] [2024-06-27 23:03:22,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405203059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:22,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:22,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:22,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594903208] [2024-06-27 23:03:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:22,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:22,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:22,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:22,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:22,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:22,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 345 transitions, 4568 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:22,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:22,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:22,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:24,107 INFO L124 PetriNetUnfolderBase]: 7917/11661 cut-off events. [2024-06-27 23:03:24,107 INFO L125 PetriNetUnfolderBase]: For 697225/698536 co-relation queries the response was YES. [2024-06-27 23:03:24,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88414 conditions, 11661 events. 7917/11661 cut-off events. For 697225/698536 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 70219 event pairs, 2277 based on Foata normal form. 75/11368 useless extension candidates. Maximal degree in co-relation 88309. Up to 10477 conditions per place. [2024-06-27 23:03:24,241 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 257 selfloop transitions, 77 changer transitions 0/373 dead transitions. [2024-06-27 23:03:24,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 373 transitions, 5308 flow [2024-06-27 23:03:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:03:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:03:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 23:03:24,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013071895424836 [2024-06-27 23:03:24,243 INFO L175 Difference]: Start difference. First operand has 219 places, 345 transitions, 4568 flow. Second operand 6 states and 184 transitions. [2024-06-27 23:03:24,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 373 transitions, 5308 flow [2024-06-27 23:03:25,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 373 transitions, 5022 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-27 23:03:25,169 INFO L231 Difference]: Finished difference. Result has 222 places, 345 transitions, 4446 flow [2024-06-27 23:03:25,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4446, PETRI_PLACES=222, PETRI_TRANSITIONS=345} [2024-06-27 23:03:25,170 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 168 predicate places. [2024-06-27 23:03:25,170 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 345 transitions, 4446 flow [2024-06-27 23:03:25,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:25,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:25,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:25,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:03:25,171 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:25,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:25,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1479358923, now seen corresponding path program 4 times [2024-06-27 23:03:25,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:25,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144878599] [2024-06-27 23:03:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:25,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:25,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:25,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144878599] [2024-06-27 23:03:25,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144878599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:25,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:25,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:25,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148293834] [2024-06-27 23:03:25,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:25,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:25,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:25,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:25,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:25,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-27 23:03:25,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 345 transitions, 4446 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:25,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:25,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-27 23:03:25,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:27,072 INFO L124 PetriNetUnfolderBase]: 8367/12230 cut-off events. [2024-06-27 23:03:27,073 INFO L125 PetriNetUnfolderBase]: For 652721/652758 co-relation queries the response was YES. [2024-06-27 23:03:27,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88108 conditions, 12230 events. 8367/12230 cut-off events. For 652721/652758 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 72179 event pairs, 2609 based on Foata normal form. 35/12261 useless extension candidates. Maximal degree in co-relation 88002. Up to 11247 conditions per place. [2024-06-27 23:03:27,501 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 314 selfloop transitions, 57 changer transitions 0/379 dead transitions. [2024-06-27 23:03:27,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 379 transitions, 5466 flow [2024-06-27 23:03:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:03:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:03:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 23:03:27,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013071895424836 [2024-06-27 23:03:27,505 INFO L175 Difference]: Start difference. First operand has 222 places, 345 transitions, 4446 flow. Second operand 6 states and 184 transitions. [2024-06-27 23:03:27,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 379 transitions, 5466 flow [2024-06-27 23:03:28,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 379 transitions, 5242 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 23:03:28,397 INFO L231 Difference]: Finished difference. Result has 222 places, 345 transitions, 4352 flow [2024-06-27 23:03:28,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4352, PETRI_PLACES=222, PETRI_TRANSITIONS=345} [2024-06-27 23:03:28,398 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 168 predicate places. [2024-06-27 23:03:28,398 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 345 transitions, 4352 flow [2024-06-27 23:03:28,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:28,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:28,398 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 23:03:28,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:03:28,399 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:28,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1474116699, now seen corresponding path program 6 times [2024-06-27 23:03:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:28,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061000394] [2024-06-27 23:03:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:28,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:28,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:28,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061000394] [2024-06-27 23:03:28,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061000394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:28,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:28,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:28,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46446500] [2024-06-27 23:03:28,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:28,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:28,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:28,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:28,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:28,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:28,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 345 transitions, 4352 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:28,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:28,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:28,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:30,297 INFO L124 PetriNetUnfolderBase]: 7937/11692 cut-off events. [2024-06-27 23:03:30,297 INFO L125 PetriNetUnfolderBase]: For 752617/753955 co-relation queries the response was YES. [2024-06-27 23:03:30,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89464 conditions, 11692 events. 7937/11692 cut-off events. For 752617/753955 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 70486 event pairs, 2277 based on Foata normal form. 155/11479 useless extension candidates. Maximal degree in co-relation 89358. Up to 10316 conditions per place. [2024-06-27 23:03:30,423 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 244 selfloop transitions, 116 changer transitions 0/399 dead transitions. [2024-06-27 23:03:30,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 399 transitions, 5618 flow [2024-06-27 23:03:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:03:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:03:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 250 transitions. [2024-06-27 23:03:30,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-06-27 23:03:30,424 INFO L175 Difference]: Start difference. First operand has 222 places, 345 transitions, 4352 flow. Second operand 8 states and 250 transitions. [2024-06-27 23:03:30,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 399 transitions, 5618 flow [2024-06-27 23:03:31,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 399 transitions, 5468 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 23:03:31,475 INFO L231 Difference]: Finished difference. Result has 225 places, 349 transitions, 4505 flow [2024-06-27 23:03:31,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4505, PETRI_PLACES=225, PETRI_TRANSITIONS=349} [2024-06-27 23:03:31,476 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 171 predicate places. [2024-06-27 23:03:31,476 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 349 transitions, 4505 flow [2024-06-27 23:03:31,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:31,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:31,476 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 23:03:31,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:03:31,477 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:31,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:31,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1473818169, now seen corresponding path program 7 times [2024-06-27 23:03:31,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:31,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731162288] [2024-06-27 23:03:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:31,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:31,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:31,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731162288] [2024-06-27 23:03:31,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731162288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:31,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:31,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:31,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072040386] [2024-06-27 23:03:31,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:31,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:31,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:31,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:31,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:31,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:31,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 349 transitions, 4505 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:31,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:31,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:31,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:33,325 INFO L124 PetriNetUnfolderBase]: 7960/11729 cut-off events. [2024-06-27 23:03:33,325 INFO L125 PetriNetUnfolderBase]: For 783711/785080 co-relation queries the response was YES. [2024-06-27 23:03:33,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90597 conditions, 11729 events. 7960/11729 cut-off events. For 783711/785080 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70669 event pairs, 2276 based on Foata normal form. 189/11550 useless extension candidates. Maximal degree in co-relation 90490. Up to 10339 conditions per place. [2024-06-27 23:03:33,464 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 241 selfloop transitions, 123 changer transitions 0/403 dead transitions. [2024-06-27 23:03:33,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 403 transitions, 5615 flow [2024-06-27 23:03:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:03:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:03:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 270 transitions. [2024-06-27 23:03:33,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-27 23:03:33,465 INFO L175 Difference]: Start difference. First operand has 225 places, 349 transitions, 4505 flow. Second operand 9 states and 270 transitions. [2024-06-27 23:03:33,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 403 transitions, 5615 flow [2024-06-27 23:03:34,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 403 transitions, 5270 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 23:03:34,557 INFO L231 Difference]: Finished difference. Result has 228 places, 353 transitions, 4486 flow [2024-06-27 23:03:34,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4486, PETRI_PLACES=228, PETRI_TRANSITIONS=353} [2024-06-27 23:03:34,558 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 174 predicate places. [2024-06-27 23:03:34,558 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 353 transitions, 4486 flow [2024-06-27 23:03:34,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:34,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:34,558 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 23:03:34,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:03:34,558 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:34,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:34,559 INFO L85 PathProgramCache]: Analyzing trace with hash -525431883, now seen corresponding path program 5 times [2024-06-27 23:03:34,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:34,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010109541] [2024-06-27 23:03:34,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:34,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:34,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:34,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010109541] [2024-06-27 23:03:34,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010109541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:34,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:34,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:34,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315344977] [2024-06-27 23:03:34,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:34,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:34,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:34,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:34,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-27 23:03:34,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 353 transitions, 4486 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:34,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:34,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-27 23:03:34,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:36,685 INFO L124 PetriNetUnfolderBase]: 8429/12333 cut-off events. [2024-06-27 23:03:36,686 INFO L125 PetriNetUnfolderBase]: For 734171/734208 co-relation queries the response was YES. [2024-06-27 23:03:36,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90612 conditions, 12333 events. 8429/12333 cut-off events. For 734171/734208 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 73021 event pairs, 2608 based on Foata normal form. 35/12364 useless extension candidates. Maximal degree in co-relation 90504. Up to 11324 conditions per place. [2024-06-27 23:03:36,810 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 318 selfloop transitions, 61 changer transitions 0/387 dead transitions. [2024-06-27 23:03:36,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 387 transitions, 5581 flow [2024-06-27 23:03:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:03:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:03:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-27 23:03:36,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2024-06-27 23:03:36,811 INFO L175 Difference]: Start difference. First operand has 228 places, 353 transitions, 4486 flow. Second operand 5 states and 159 transitions. [2024-06-27 23:03:36,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 387 transitions, 5581 flow [2024-06-27 23:03:38,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 387 transitions, 5337 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 23:03:38,009 INFO L231 Difference]: Finished difference. Result has 228 places, 358 transitions, 4493 flow [2024-06-27 23:03:38,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4493, PETRI_PLACES=228, PETRI_TRANSITIONS=358} [2024-06-27 23:03:38,010 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 174 predicate places. [2024-06-27 23:03:38,010 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 358 transitions, 4493 flow [2024-06-27 23:03:38,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:38,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:38,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:38,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:03:38,011 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:38,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash -525426489, now seen corresponding path program 8 times [2024-06-27 23:03:38,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:38,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646853724] [2024-06-27 23:03:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:38,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:38,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:38,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646853724] [2024-06-27 23:03:38,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646853724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:38,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:38,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:38,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536343195] [2024-06-27 23:03:38,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:38,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:38,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:38,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:38,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:38,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:38,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 358 transitions, 4493 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:38,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:38,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:38,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:40,097 INFO L124 PetriNetUnfolderBase]: 7953/11724 cut-off events. [2024-06-27 23:03:40,097 INFO L125 PetriNetUnfolderBase]: For 829633/830934 co-relation queries the response was YES. [2024-06-27 23:03:40,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91448 conditions, 11724 events. 7953/11724 cut-off events. For 829633/830934 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 70707 event pairs, 2276 based on Foata normal form. 128/11484 useless extension candidates. Maximal degree in co-relation 91338. Up to 10388 conditions per place. [2024-06-27 23:03:40,263 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 250 selfloop transitions, 105 changer transitions 0/395 dead transitions. [2024-06-27 23:03:40,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 395 transitions, 5489 flow [2024-06-27 23:03:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:03:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:03:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-27 23:03:40,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-06-27 23:03:40,264 INFO L175 Difference]: Start difference. First operand has 228 places, 358 transitions, 4493 flow. Second operand 6 states and 195 transitions. [2024-06-27 23:03:40,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 395 transitions, 5489 flow [2024-06-27 23:03:41,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 395 transitions, 5336 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 23:03:41,672 INFO L231 Difference]: Finished difference. Result has 230 places, 358 transitions, 4574 flow [2024-06-27 23:03:41,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4574, PETRI_PLACES=230, PETRI_TRANSITIONS=358} [2024-06-27 23:03:41,673 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 176 predicate places. [2024-06-27 23:03:41,673 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 358 transitions, 4574 flow [2024-06-27 23:03:41,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:41,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:41,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:41,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:03:41,673 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:41,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:41,674 INFO L85 PathProgramCache]: Analyzing trace with hash -525432069, now seen corresponding path program 9 times [2024-06-27 23:03:41,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:41,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714716165] [2024-06-27 23:03:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:41,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:41,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:41,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714716165] [2024-06-27 23:03:41,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714716165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:41,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:41,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:41,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414326005] [2024-06-27 23:03:41,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:41,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:41,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:41,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:41,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:41,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 358 transitions, 4574 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:41,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:41,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:41,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:43,578 INFO L124 PetriNetUnfolderBase]: 7942/11710 cut-off events. [2024-06-27 23:03:43,578 INFO L125 PetriNetUnfolderBase]: For 803101/804395 co-relation queries the response was YES. [2024-06-27 23:03:43,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90627 conditions, 11710 events. 7942/11710 cut-off events. For 803101/804395 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 70739 event pairs, 2275 based on Foata normal form. 128/11470 useless extension candidates. Maximal degree in co-relation 90518. Up to 10378 conditions per place. [2024-06-27 23:03:43,726 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 255 selfloop transitions, 105 changer transitions 0/400 dead transitions. [2024-06-27 23:03:43,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 400 transitions, 5404 flow [2024-06-27 23:03:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:03:43,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:03:43,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-27 23:03:43,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 23:03:43,727 INFO L175 Difference]: Start difference. First operand has 230 places, 358 transitions, 4574 flow. Second operand 7 states and 221 transitions. [2024-06-27 23:03:43,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 400 transitions, 5404 flow [2024-06-27 23:03:44,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 400 transitions, 5124 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 23:03:44,952 INFO L231 Difference]: Finished difference. Result has 230 places, 358 transitions, 4526 flow [2024-06-27 23:03:44,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4526, PETRI_PLACES=230, PETRI_TRANSITIONS=358} [2024-06-27 23:03:44,953 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 176 predicate places. [2024-06-27 23:03:44,953 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 358 transitions, 4526 flow [2024-06-27 23:03:44,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:44,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:44,954 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 23:03:44,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:03:44,954 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:44,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:44,954 INFO L85 PathProgramCache]: Analyzing trace with hash -525420723, now seen corresponding path program 6 times [2024-06-27 23:03:44,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:44,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899725159] [2024-06-27 23:03:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:44,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899725159] [2024-06-27 23:03:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899725159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:45,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:45,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:45,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212423161] [2024-06-27 23:03:45,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:45,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:45,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:45,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-27 23:03:45,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 358 transitions, 4526 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:45,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:45,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-27 23:03:45,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:46,928 INFO L124 PetriNetUnfolderBase]: 8400/12292 cut-off events. [2024-06-27 23:03:46,928 INFO L125 PetriNetUnfolderBase]: For 725986/726025 co-relation queries the response was YES. [2024-06-27 23:03:47,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89932 conditions, 12292 events. 8400/12292 cut-off events. For 725986/726025 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72736 event pairs, 2591 based on Foata normal form. 37/12326 useless extension candidates. Maximal degree in co-relation 89823. Up to 11289 conditions per place. [2024-06-27 23:03:47,073 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 320 selfloop transitions, 66 changer transitions 0/394 dead transitions. [2024-06-27 23:03:47,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 394 transitions, 5408 flow [2024-06-27 23:03:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:03:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:03:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 23:03:47,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5770308123249299 [2024-06-27 23:03:47,074 INFO L175 Difference]: Start difference. First operand has 230 places, 358 transitions, 4526 flow. Second operand 7 states and 206 transitions. [2024-06-27 23:03:47,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 394 transitions, 5408 flow [2024-06-27 23:03:48,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 394 transitions, 5164 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 23:03:48,322 INFO L231 Difference]: Finished difference. Result has 229 places, 359 transitions, 4441 flow [2024-06-27 23:03:48,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4284, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4441, PETRI_PLACES=229, PETRI_TRANSITIONS=359} [2024-06-27 23:03:48,322 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 175 predicate places. [2024-06-27 23:03:48,323 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 359 transitions, 4441 flow [2024-06-27 23:03:48,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:48,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:48,323 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 23:03:48,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:03:48,323 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:48,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:48,324 INFO L85 PathProgramCache]: Analyzing trace with hash -727576499, now seen corresponding path program 7 times [2024-06-27 23:03:48,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:48,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493179541] [2024-06-27 23:03:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:48,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:48,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:48,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493179541] [2024-06-27 23:03:48,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493179541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:48,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:48,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:48,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898647611] [2024-06-27 23:03:48,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:48,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:48,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:48,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:48,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:48,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:48,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 359 transitions, 4441 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:48,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:48,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:48,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:50,069 INFO L124 PetriNetUnfolderBase]: 8416/12313 cut-off events. [2024-06-27 23:03:50,070 INFO L125 PetriNetUnfolderBase]: For 699498/699524 co-relation queries the response was YES. [2024-06-27 23:03:50,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89308 conditions, 12313 events. 8416/12313 cut-off events. For 699498/699524 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 72889 event pairs, 2643 based on Foata normal form. 19/12328 useless extension candidates. Maximal degree in co-relation 89201. Up to 11216 conditions per place. [2024-06-27 23:03:50,221 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 292 selfloop transitions, 91 changer transitions 0/392 dead transitions. [2024-06-27 23:03:50,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 392 transitions, 5533 flow [2024-06-27 23:03:50,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:03:50,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:03:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 23:03:50,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-06-27 23:03:50,222 INFO L175 Difference]: Start difference. First operand has 229 places, 359 transitions, 4441 flow. Second operand 6 states and 182 transitions. [2024-06-27 23:03:50,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 392 transitions, 5533 flow [2024-06-27 23:03:51,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 392 transitions, 5391 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 23:03:51,364 INFO L231 Difference]: Finished difference. Result has 231 places, 365 transitions, 4607 flow [2024-06-27 23:03:51,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4303, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4607, PETRI_PLACES=231, PETRI_TRANSITIONS=365} [2024-06-27 23:03:51,364 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 177 predicate places. [2024-06-27 23:03:51,365 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 365 transitions, 4607 flow [2024-06-27 23:03:51,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:51,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:51,365 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 23:03:51,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:03:51,365 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:51,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:51,365 INFO L85 PathProgramCache]: Analyzing trace with hash -738538409, now seen corresponding path program 8 times [2024-06-27 23:03:51,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:51,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513441895] [2024-06-27 23:03:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:51,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:51,540 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 23:03:51,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:51,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513441895] [2024-06-27 23:03:51,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513441895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:51,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:51,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:51,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963618900] [2024-06-27 23:03:51,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:51,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:51,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:51,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:51,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 365 transitions, 4607 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:51,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:51,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:51,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:53,176 INFO L124 PetriNetUnfolderBase]: 8432/12338 cut-off events. [2024-06-27 23:03:53,176 INFO L125 PetriNetUnfolderBase]: For 698855/698892 co-relation queries the response was YES. [2024-06-27 23:03:53,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89779 conditions, 12338 events. 8432/12338 cut-off events. For 698855/698892 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 73126 event pairs, 2607 based on Foata normal form. 35/12369 useless extension candidates. Maximal degree in co-relation 89670. Up to 11233 conditions per place. [2024-06-27 23:03:53,325 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 300 selfloop transitions, 96 changer transitions 0/405 dead transitions. [2024-06-27 23:03:53,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 405 transitions, 5740 flow [2024-06-27 23:03:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:03:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:03:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-27 23:03:53,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-27 23:03:53,327 INFO L175 Difference]: Start difference. First operand has 231 places, 365 transitions, 4607 flow. Second operand 6 states and 192 transitions. [2024-06-27 23:03:53,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 405 transitions, 5740 flow [2024-06-27 23:03:54,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 405 transitions, 5603 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 23:03:54,589 INFO L231 Difference]: Finished difference. Result has 235 places, 369 transitions, 4741 flow [2024-06-27 23:03:54,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4484, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4741, PETRI_PLACES=235, PETRI_TRANSITIONS=369} [2024-06-27 23:03:54,589 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 181 predicate places. [2024-06-27 23:03:54,589 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 369 transitions, 4741 flow [2024-06-27 23:03:54,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:54,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:54,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:54,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:03:54,590 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:54,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:54,590 INFO L85 PathProgramCache]: Analyzing trace with hash -738538595, now seen corresponding path program 10 times [2024-06-27 23:03:54,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:54,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993671950] [2024-06-27 23:03:54,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:54,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:54,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:54,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993671950] [2024-06-27 23:03:54,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993671950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:54,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:54,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:54,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704380117] [2024-06-27 23:03:54,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:54,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:54,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:54,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:03:54,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 369 transitions, 4741 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 23:03:54,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:54,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:03:54,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:56,367 INFO L124 PetriNetUnfolderBase]: 7958/11736 cut-off events. [2024-06-27 23:03:56,367 INFO L125 PetriNetUnfolderBase]: For 798355/799649 co-relation queries the response was YES. [2024-06-27 23:03:56,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90635 conditions, 11736 events. 7958/11736 cut-off events. For 798355/799649 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 70880 event pairs, 2274 based on Foata normal form. 151/11519 useless extension candidates. Maximal degree in co-relation 90524. Up to 10297 conditions per place. [2024-06-27 23:03:56,510 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 226 selfloop transitions, 147 changer transitions 0/418 dead transitions. [2024-06-27 23:03:56,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 418 transitions, 5615 flow [2024-06-27 23:03:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:03:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:03:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-27 23:03:56,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6299019607843137 [2024-06-27 23:03:56,511 INFO L175 Difference]: Start difference. First operand has 235 places, 369 transitions, 4741 flow. Second operand 8 states and 257 transitions. [2024-06-27 23:03:56,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 418 transitions, 5615 flow [2024-06-27 23:03:57,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 418 transitions, 5414 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 23:03:57,927 INFO L231 Difference]: Finished difference. Result has 238 places, 369 transitions, 4862 flow [2024-06-27 23:03:57,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4540, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4862, PETRI_PLACES=238, PETRI_TRANSITIONS=369} [2024-06-27 23:03:57,927 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 184 predicate places. [2024-06-27 23:03:57,927 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 369 transitions, 4862 flow [2024-06-27 23:03:57,928 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 23:03:57,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:57,928 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 23:03:57,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:03:57,928 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:03:57,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash -738301259, now seen corresponding path program 9 times [2024-06-27 23:03:57,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:57,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287511887] [2024-06-27 23:03:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:57,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:58,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:58,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287511887] [2024-06-27 23:03:58,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287511887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:58,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:58,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:58,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950806978] [2024-06-27 23:03:58,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:58,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:58,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:58,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:58,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:58,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:03:58,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 369 transitions, 4862 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:03:58,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:58,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:03:58,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:59,718 INFO L124 PetriNetUnfolderBase]: 8414/12315 cut-off events. [2024-06-27 23:03:59,718 INFO L125 PetriNetUnfolderBase]: For 695795/695832 co-relation queries the response was YES. [2024-06-27 23:03:59,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89603 conditions, 12315 events. 8414/12315 cut-off events. For 695795/695832 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 72917 event pairs, 2606 based on Foata normal form. 35/12346 useless extension candidates. Maximal degree in co-relation 89493. Up to 11212 conditions per place. [2024-06-27 23:03:59,863 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 295 selfloop transitions, 96 changer transitions 0/400 dead transitions. [2024-06-27 23:03:59,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 400 transitions, 5731 flow [2024-06-27 23:03:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:03:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:03:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 23:03:59,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-27 23:03:59,864 INFO L175 Difference]: Start difference. First operand has 238 places, 369 transitions, 4862 flow. Second operand 6 states and 186 transitions. [2024-06-27 23:03:59,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 400 transitions, 5731 flow [2024-06-27 23:04:01,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 400 transitions, 5405 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 23:04:01,109 INFO L231 Difference]: Finished difference. Result has 236 places, 369 transitions, 4742 flow [2024-06-27 23:04:01,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4536, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4742, PETRI_PLACES=236, PETRI_TRANSITIONS=369} [2024-06-27 23:04:01,109 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 182 predicate places. [2024-06-27 23:04:01,109 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 369 transitions, 4742 flow [2024-06-27 23:04:01,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:04:01,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:01,110 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 23:04:01,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:04:01,110 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:01,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:01,111 INFO L85 PathProgramCache]: Analyzing trace with hash -727579475, now seen corresponding path program 4 times [2024-06-27 23:04:01,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:01,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759567776] [2024-06-27 23:04:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:01,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:01,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:01,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759567776] [2024-06-27 23:04:01,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759567776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:01,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:01,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:01,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079428508] [2024-06-27 23:04:01,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:01,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:01,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:01,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:01,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:01,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:04:01,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 369 transitions, 4742 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:04:01,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:01,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:04:01,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:02,883 INFO L124 PetriNetUnfolderBase]: 8512/12452 cut-off events. [2024-06-27 23:04:02,884 INFO L125 PetriNetUnfolderBase]: For 657013/657027 co-relation queries the response was YES. [2024-06-27 23:04:02,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88898 conditions, 12452 events. 8512/12452 cut-off events. For 657013/657027 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 73835 event pairs, 2577 based on Foata normal form. 21/12469 useless extension candidates. Maximal degree in co-relation 88788. Up to 11518 conditions per place. [2024-06-27 23:04:03,030 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 358 selfloop transitions, 33 changer transitions 0/400 dead transitions. [2024-06-27 23:04:03,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 400 transitions, 5649 flow [2024-06-27 23:04:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:04:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:04:03,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 23:04:03,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849673202614379 [2024-06-27 23:04:03,031 INFO L175 Difference]: Start difference. First operand has 236 places, 369 transitions, 4742 flow. Second operand 6 states and 179 transitions. [2024-06-27 23:04:03,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 400 transitions, 5649 flow [2024-06-27 23:04:04,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 400 transitions, 5454 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 23:04:04,068 INFO L231 Difference]: Finished difference. Result has 237 places, 371 transitions, 4651 flow [2024-06-27 23:04:04,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4547, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4651, PETRI_PLACES=237, PETRI_TRANSITIONS=371} [2024-06-27 23:04:04,069 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 183 predicate places. [2024-06-27 23:04:04,069 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 371 transitions, 4651 flow [2024-06-27 23:04:04,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:04:04,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:04,069 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 23:04:04,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:04:04,069 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:04,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:04,070 INFO L85 PathProgramCache]: Analyzing trace with hash -738304235, now seen corresponding path program 5 times [2024-06-27 23:04:04,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:04,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651802202] [2024-06-27 23:04:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:04,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:04,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:04,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651802202] [2024-06-27 23:04:04,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651802202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:04,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:04,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:04,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934952652] [2024-06-27 23:04:04,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:04,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:04,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:04,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:04,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:04,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:04:04,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 371 transitions, 4651 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:04:04,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:04,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:04:04,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:05,949 INFO L124 PetriNetUnfolderBase]: 8571/12550 cut-off events. [2024-06-27 23:04:05,949 INFO L125 PetriNetUnfolderBase]: For 652281/652303 co-relation queries the response was YES. [2024-06-27 23:04:06,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89051 conditions, 12550 events. 8571/12550 cut-off events. For 652281/652303 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 74418 event pairs, 2578 based on Foata normal form. 34/12580 useless extension candidates. Maximal degree in co-relation 88941. Up to 11511 conditions per place. [2024-06-27 23:04:06,101 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 364 selfloop transitions, 35 changer transitions 0/408 dead transitions. [2024-06-27 23:04:06,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 408 transitions, 5594 flow [2024-06-27 23:04:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:04:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:04:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 23:04:06,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045751633986928 [2024-06-27 23:04:06,102 INFO L175 Difference]: Start difference. First operand has 237 places, 371 transitions, 4651 flow. Second operand 6 states and 185 transitions. [2024-06-27 23:04:06,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 408 transitions, 5594 flow [2024-06-27 23:04:07,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 408 transitions, 5539 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:04:07,214 INFO L231 Difference]: Finished difference. Result has 240 places, 373 transitions, 4712 flow [2024-06-27 23:04:07,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4596, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4712, PETRI_PLACES=240, PETRI_TRANSITIONS=373} [2024-06-27 23:04:07,214 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 186 predicate places. [2024-06-27 23:04:07,214 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 373 transitions, 4712 flow [2024-06-27 23:04:07,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:04:07,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:07,215 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 23:04:07,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:04:07,215 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:07,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash -738630665, now seen corresponding path program 6 times [2024-06-27 23:04:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:07,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198950026] [2024-06-27 23:04:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:07,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:07,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:07,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198950026] [2024-06-27 23:04:07,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198950026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:07,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:07,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:07,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302459010] [2024-06-27 23:04:07,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:07,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:07,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:07,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:07,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:07,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:04:07,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 373 transitions, 4712 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:04:07,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:07,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:04:07,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:09,047 INFO L124 PetriNetUnfolderBase]: 8539/12498 cut-off events. [2024-06-27 23:04:09,048 INFO L125 PetriNetUnfolderBase]: For 665406/665428 co-relation queries the response was YES. [2024-06-27 23:04:09,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89005 conditions, 12498 events. 8539/12498 cut-off events. For 665406/665428 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 74066 event pairs, 2070 based on Foata normal form. 30/12524 useless extension candidates. Maximal degree in co-relation 88893. Up to 11067 conditions per place. [2024-06-27 23:04:09,196 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 356 selfloop transitions, 51 changer transitions 0/416 dead transitions. [2024-06-27 23:04:09,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 416 transitions, 5693 flow [2024-06-27 23:04:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:04:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:04:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-27 23:04:09,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6241830065359477 [2024-06-27 23:04:09,197 INFO L175 Difference]: Start difference. First operand has 240 places, 373 transitions, 4712 flow. Second operand 6 states and 191 transitions. [2024-06-27 23:04:09,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 416 transitions, 5693 flow [2024-06-27 23:04:10,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 416 transitions, 5615 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 23:04:10,288 INFO L231 Difference]: Finished difference. Result has 243 places, 375 transitions, 4806 flow [2024-06-27 23:04:10,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4806, PETRI_PLACES=243, PETRI_TRANSITIONS=375} [2024-06-27 23:04:10,289 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 189 predicate places. [2024-06-27 23:04:10,289 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 375 transitions, 4806 flow [2024-06-27 23:04:10,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:04:10,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:10,290 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 23:04:10,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:04:10,290 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:10,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:10,290 INFO L85 PathProgramCache]: Analyzing trace with hash -727179761, now seen corresponding path program 1 times [2024-06-27 23:04:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:10,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405368006] [2024-06-27 23:04:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:10,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:10,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:10,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405368006] [2024-06-27 23:04:10,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405368006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:10,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:10,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:10,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774494571] [2024-06-27 23:04:10,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:10,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:10,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:10,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:10,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:10,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:04:10,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 375 transitions, 4806 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:04:10,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:10,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:04:10,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:12,145 INFO L124 PetriNetUnfolderBase]: 8507/12459 cut-off events. [2024-06-27 23:04:12,145 INFO L125 PetriNetUnfolderBase]: For 680921/680935 co-relation queries the response was YES. [2024-06-27 23:04:12,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89382 conditions, 12459 events. 8507/12459 cut-off events. For 680921/680935 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 73799 event pairs, 2505 based on Foata normal form. 17/12472 useless extension candidates. Maximal degree in co-relation 89268. Up to 11216 conditions per place. [2024-06-27 23:04:12,295 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 363 selfloop transitions, 41 changer transitions 0/413 dead transitions. [2024-06-27 23:04:12,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 413 transitions, 5775 flow [2024-06-27 23:04:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:04:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:04:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 23:04:12,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-06-27 23:04:12,296 INFO L175 Difference]: Start difference. First operand has 243 places, 375 transitions, 4806 flow. Second operand 6 states and 182 transitions. [2024-06-27 23:04:12,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 413 transitions, 5775 flow [2024-06-27 23:04:13,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 413 transitions, 5679 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 23:04:13,429 INFO L231 Difference]: Finished difference. Result has 245 places, 380 transitions, 4863 flow [2024-06-27 23:04:13,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4710, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4863, PETRI_PLACES=245, PETRI_TRANSITIONS=380} [2024-06-27 23:04:13,430 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 191 predicate places. [2024-06-27 23:04:13,430 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 380 transitions, 4863 flow [2024-06-27 23:04:13,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:04:13,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:13,430 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 23:04:13,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:04:13,431 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:13,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:13,431 INFO L85 PathProgramCache]: Analyzing trace with hash -900760962, now seen corresponding path program 1 times [2024-06-27 23:04:13,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:13,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143475768] [2024-06-27 23:04:13,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:13,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:13,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:13,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143475768] [2024-06-27 23:04:13,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143475768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:13,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:13,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:04:13,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868591254] [2024-06-27 23:04:13,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:13,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:04:13,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:13,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:04:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:04:13,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:04:13,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 380 transitions, 4863 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 23:04:13,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:13,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:04:13,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:15,212 INFO L124 PetriNetUnfolderBase]: 7752/11548 cut-off events. [2024-06-27 23:04:15,213 INFO L125 PetriNetUnfolderBase]: For 694253/694410 co-relation queries the response was YES. [2024-06-27 23:04:15,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86279 conditions, 11548 events. 7752/11548 cut-off events. For 694253/694410 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 70676 event pairs, 2364 based on Foata normal form. 65/11387 useless extension candidates. Maximal degree in co-relation 86165. Up to 10124 conditions per place. [2024-06-27 23:04:15,359 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 294 selfloop transitions, 41 changer transitions 0/395 dead transitions. [2024-06-27 23:04:15,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 395 transitions, 5619 flow [2024-06-27 23:04:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:04:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:04:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 23:04:15,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225490196078431 [2024-06-27 23:04:15,360 INFO L175 Difference]: Start difference. First operand has 245 places, 380 transitions, 4863 flow. Second operand 4 states and 127 transitions. [2024-06-27 23:04:15,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 395 transitions, 5619 flow [2024-06-27 23:04:16,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 395 transitions, 5569 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 23:04:16,463 INFO L231 Difference]: Finished difference. Result has 247 places, 384 transitions, 4979 flow [2024-06-27 23:04:16,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4813, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4979, PETRI_PLACES=247, PETRI_TRANSITIONS=384} [2024-06-27 23:04:16,464 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 193 predicate places. [2024-06-27 23:04:16,464 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 384 transitions, 4979 flow [2024-06-27 23:04:16,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 23:04:16,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:16,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:16,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:04:16,465 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:16,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:16,465 INFO L85 PathProgramCache]: Analyzing trace with hash 738876346, now seen corresponding path program 2 times [2024-06-27 23:04:16,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:16,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088510129] [2024-06-27 23:04:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:16,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:16,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:16,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088510129] [2024-06-27 23:04:16,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088510129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:16,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:16,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:04:16,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386740924] [2024-06-27 23:04:16,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:16,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:04:16,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:16,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:04:16,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:04:16,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:04:16,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 384 transitions, 4979 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 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 23:04:16,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:16,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:04:16,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:18,221 INFO L124 PetriNetUnfolderBase]: 7736/11488 cut-off events. [2024-06-27 23:04:18,221 INFO L125 PetriNetUnfolderBase]: For 717198/717355 co-relation queries the response was YES. [2024-06-27 23:04:18,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87909 conditions, 11488 events. 7736/11488 cut-off events. For 717198/717355 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 70024 event pairs, 2364 based on Foata normal form. 65/11327 useless extension candidates. Maximal degree in co-relation 87792. Up to 10096 conditions per place. [2024-06-27 23:04:18,366 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 296 selfloop transitions, 45 changer transitions 0/400 dead transitions. [2024-06-27 23:04:18,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 400 transitions, 5757 flow [2024-06-27 23:04:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:04:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:04:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 23:04:18,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764705882352941 [2024-06-27 23:04:18,367 INFO L175 Difference]: Start difference. First operand has 247 places, 384 transitions, 4979 flow. Second operand 5 states and 147 transitions. [2024-06-27 23:04:18,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 400 transitions, 5757 flow [2024-06-27 23:04:19,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 400 transitions, 5637 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 23:04:19,373 INFO L231 Difference]: Finished difference. Result has 250 places, 388 transitions, 5030 flow [2024-06-27 23:04:19,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4865, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5030, PETRI_PLACES=250, PETRI_TRANSITIONS=388} [2024-06-27 23:04:19,373 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 196 predicate places. [2024-06-27 23:04:19,373 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 388 transitions, 5030 flow [2024-06-27 23:04:19,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 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 23:04:19,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:19,373 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 23:04:19,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:04:19,374 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:19,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1633582683, now seen corresponding path program 1 times [2024-06-27 23:04:19,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:19,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762656355] [2024-06-27 23:04:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:19,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:19,556 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 23:04:19,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:19,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762656355] [2024-06-27 23:04:19,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762656355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:19,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:19,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:19,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681640989] [2024-06-27 23:04:19,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:19,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:19,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:19,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:19,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:19,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:04:19,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 388 transitions, 5030 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 23:04:19,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:19,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:04:19,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:21,321 INFO L124 PetriNetUnfolderBase]: 8299/12392 cut-off events. [2024-06-27 23:04:21,321 INFO L125 PetriNetUnfolderBase]: For 716081/716087 co-relation queries the response was YES. [2024-06-27 23:04:21,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92899 conditions, 12392 events. 8299/12392 cut-off events. For 716081/716087 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 75972 event pairs, 2387 based on Foata normal form. 30/12417 useless extension candidates. Maximal degree in co-relation 92782. Up to 10750 conditions per place. [2024-06-27 23:04:21,490 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 383 selfloop transitions, 49 changer transitions 0/444 dead transitions. [2024-06-27 23:04:21,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 444 transitions, 6355 flow [2024-06-27 23:04:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:04:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:04:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-27 23:04:21,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 23:04:21,491 INFO L175 Difference]: Start difference. First operand has 250 places, 388 transitions, 5030 flow. Second operand 7 states and 221 transitions. [2024-06-27 23:04:21,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 444 transitions, 6355 flow [2024-06-27 23:04:22,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 444 transitions, 6222 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 23:04:22,646 INFO L231 Difference]: Finished difference. Result has 256 places, 399 transitions, 5174 flow [2024-06-27 23:04:22,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4897, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5174, PETRI_PLACES=256, PETRI_TRANSITIONS=399} [2024-06-27 23:04:22,647 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 202 predicate places. [2024-06-27 23:04:22,648 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 399 transitions, 5174 flow [2024-06-27 23:04:22,648 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 23:04:22,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:22,648 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 23:04:22,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:04:22,648 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:22,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash -930417253, now seen corresponding path program 2 times [2024-06-27 23:04:22,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:22,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451784950] [2024-06-27 23:04:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:22,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:22,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:22,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451784950] [2024-06-27 23:04:22,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451784950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:22,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:22,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:22,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908993754] [2024-06-27 23:04:22,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:22,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:22,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:22,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:04:22,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 399 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 23:04:22,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:22,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:04:22,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:24,741 INFO L124 PetriNetUnfolderBase]: 8639/12904 cut-off events. [2024-06-27 23:04:24,742 INFO L125 PetriNetUnfolderBase]: For 788286/788292 co-relation queries the response was YES. [2024-06-27 23:04:24,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99134 conditions, 12904 events. 8639/12904 cut-off events. For 788286/788292 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 79593 event pairs, 2635 based on Foata normal form. 30/12929 useless extension candidates. Maximal degree in co-relation 99014. Up to 11484 conditions per place. [2024-06-27 23:04:24,917 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 386 selfloop transitions, 45 changer transitions 0/443 dead transitions. [2024-06-27 23:04:24,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 443 transitions, 6433 flow [2024-06-27 23:04:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:04:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:04:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-27 23:04:24,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106442577030813 [2024-06-27 23:04:24,918 INFO L175 Difference]: Start difference. First operand has 256 places, 399 transitions, 5174 flow. Second operand 7 states and 218 transitions. [2024-06-27 23:04:24,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 443 transitions, 6433 flow [2024-06-27 23:04:26,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 443 transitions, 6346 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 23:04:26,195 INFO L231 Difference]: Finished difference. Result has 262 places, 404 transitions, 5286 flow [2024-06-27 23:04:26,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5091, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5286, PETRI_PLACES=262, PETRI_TRANSITIONS=404} [2024-06-27 23:04:26,196 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 208 predicate places. [2024-06-27 23:04:26,196 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 404 transitions, 5286 flow [2024-06-27 23:04:26,196 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 23:04:26,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:26,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:26,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:04:26,197 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:26,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:26,197 INFO L85 PathProgramCache]: Analyzing trace with hash -930269383, now seen corresponding path program 3 times [2024-06-27 23:04:26,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:26,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723235784] [2024-06-27 23:04:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:26,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:26,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:26,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723235784] [2024-06-27 23:04:26,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723235784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:26,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:26,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:26,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279472094] [2024-06-27 23:04:26,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:26,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:26,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:26,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:04:26,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 404 transitions, 5286 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 23:04:26,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:26,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:04:26,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:28,297 INFO L124 PetriNetUnfolderBase]: 8567/12800 cut-off events. [2024-06-27 23:04:28,297 INFO L125 PetriNetUnfolderBase]: For 791774/791780 co-relation queries the response was YES. [2024-06-27 23:04:28,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97843 conditions, 12800 events. 8567/12800 cut-off events. For 791774/791780 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 78825 event pairs, 2637 based on Foata normal form. 38/12833 useless extension candidates. Maximal degree in co-relation 97720. Up to 11626 conditions per place. [2024-06-27 23:04:28,469 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 385 selfloop transitions, 42 changer transitions 0/439 dead transitions. [2024-06-27 23:04:28,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 439 transitions, 6264 flow [2024-06-27 23:04:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:04:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:04:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 23:04:28,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966386554621849 [2024-06-27 23:04:28,471 INFO L175 Difference]: Start difference. First operand has 262 places, 404 transitions, 5286 flow. Second operand 7 states and 213 transitions. [2024-06-27 23:04:28,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 439 transitions, 6264 flow [2024-06-27 23:04:30,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 439 transitions, 6175 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 23:04:30,417 INFO L231 Difference]: Finished difference. Result has 266 places, 405 transitions, 5309 flow [2024-06-27 23:04:30,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5309, PETRI_PLACES=266, PETRI_TRANSITIONS=405} [2024-06-27 23:04:30,418 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 212 predicate places. [2024-06-27 23:04:30,418 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 405 transitions, 5309 flow [2024-06-27 23:04:30,419 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 23:04:30,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:30,419 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 23:04:30,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:04:30,419 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:30,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:30,420 INFO L85 PathProgramCache]: Analyzing trace with hash -58931655, now seen corresponding path program 4 times [2024-06-27 23:04:30,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:30,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389069215] [2024-06-27 23:04:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:30,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:30,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:30,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389069215] [2024-06-27 23:04:30,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389069215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:30,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:30,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:30,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077141475] [2024-06-27 23:04:30,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:30,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:30,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:30,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:04:30,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 405 transitions, 5309 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 23:04:30,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:30,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:04:30,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:33,116 INFO L124 PetriNetUnfolderBase]: 8723/13056 cut-off events. [2024-06-27 23:04:33,116 INFO L125 PetriNetUnfolderBase]: For 820695/820701 co-relation queries the response was YES. [2024-06-27 23:04:33,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99721 conditions, 13056 events. 8723/13056 cut-off events. For 820695/820701 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 80980 event pairs, 2671 based on Foata normal form. 38/13089 useless extension candidates. Maximal degree in co-relation 99596. Up to 11898 conditions per place. [2024-06-27 23:04:33,376 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 390 selfloop transitions, 35 changer transitions 0/437 dead transitions. [2024-06-27 23:04:33,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 437 transitions, 6299 flow [2024-06-27 23:04:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:04:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:04:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 23:04:33,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 23:04:33,378 INFO L175 Difference]: Start difference. First operand has 266 places, 405 transitions, 5309 flow. Second operand 6 states and 187 transitions. [2024-06-27 23:04:33,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 437 transitions, 6299 flow [2024-06-27 23:04:34,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 437 transitions, 6215 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 23:04:34,509 INFO L231 Difference]: Finished difference. Result has 267 places, 407 transitions, 5351 flow [2024-06-27 23:04:34,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5225, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5351, PETRI_PLACES=267, PETRI_TRANSITIONS=407} [2024-06-27 23:04:34,509 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 213 predicate places. [2024-06-27 23:04:34,509 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 407 transitions, 5351 flow [2024-06-27 23:04:34,509 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 23:04:34,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:34,510 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 23:04:34,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:04:34,510 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:34,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:34,510 INFO L85 PathProgramCache]: Analyzing trace with hash -59079525, now seen corresponding path program 5 times [2024-06-27 23:04:34,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:34,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194201610] [2024-06-27 23:04:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:34,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:34,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:34,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194201610] [2024-06-27 23:04:34,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194201610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:34,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:34,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:34,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199295828] [2024-06-27 23:04:34,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:34,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:34,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:34,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:34,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:34,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:04:34,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 407 transitions, 5351 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 23:04:34,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:34,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:04:34,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:37,282 INFO L124 PetriNetUnfolderBase]: 8835/13228 cut-off events. [2024-06-27 23:04:37,282 INFO L125 PetriNetUnfolderBase]: For 844852/844858 co-relation queries the response was YES. [2024-06-27 23:04:37,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101518 conditions, 13228 events. 8835/13228 cut-off events. For 844852/844858 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 82199 event pairs, 2471 based on Foata normal form. 30/13253 useless extension candidates. Maximal degree in co-relation 101392. Up to 11580 conditions per place. [2024-06-27 23:04:37,479 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 394 selfloop transitions, 42 changer transitions 0/448 dead transitions. [2024-06-27 23:04:37,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 448 transitions, 6594 flow [2024-06-27 23:04:37,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:04:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:04:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-27 23:04:37,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-06-27 23:04:37,480 INFO L175 Difference]: Start difference. First operand has 267 places, 407 transitions, 5351 flow. Second operand 6 states and 195 transitions. [2024-06-27 23:04:37,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 448 transitions, 6594 flow [2024-06-27 23:04:38,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 448 transitions, 6508 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 23:04:38,881 INFO L231 Difference]: Finished difference. Result has 270 places, 410 transitions, 5425 flow [2024-06-27 23:04:38,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5425, PETRI_PLACES=270, PETRI_TRANSITIONS=410} [2024-06-27 23:04:38,882 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 216 predicate places. [2024-06-27 23:04:38,882 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 410 transitions, 5425 flow [2024-06-27 23:04:38,882 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 23:04:38,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:38,882 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 23:04:38,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:04:38,882 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:38,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash -53569275, now seen corresponding path program 6 times [2024-06-27 23:04:38,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:38,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820494153] [2024-06-27 23:04:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:38,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:39,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:39,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820494153] [2024-06-27 23:04:39,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820494153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:39,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:39,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:39,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889928370] [2024-06-27 23:04:39,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:39,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:39,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:39,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:39,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:39,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:04:39,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 410 transitions, 5425 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 23:04:39,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:39,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:04:39,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:41,846 INFO L124 PetriNetUnfolderBase]: 8765/13128 cut-off events. [2024-06-27 23:04:41,846 INFO L125 PetriNetUnfolderBase]: For 843759/843767 co-relation queries the response was YES. [2024-06-27 23:04:41,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100000 conditions, 13128 events. 8765/13128 cut-off events. For 843759/843767 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 81611 event pairs, 2643 based on Foata normal form. 40/13165 useless extension candidates. Maximal degree in co-relation 99872. Up to 11966 conditions per place. [2024-06-27 23:04:42,021 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 398 selfloop transitions, 39 changer transitions 0/449 dead transitions. [2024-06-27 23:04:42,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 449 transitions, 6437 flow [2024-06-27 23:04:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:04:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:04:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 23:04:42,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 23:04:42,022 INFO L175 Difference]: Start difference. First operand has 270 places, 410 transitions, 5425 flow. Second operand 8 states and 238 transitions. [2024-06-27 23:04:42,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 449 transitions, 6437 flow [2024-06-27 23:04:43,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 449 transitions, 6256 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 23:04:43,053 INFO L231 Difference]: Finished difference. Result has 273 places, 411 transitions, 5354 flow [2024-06-27 23:04:43,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5252, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5354, PETRI_PLACES=273, PETRI_TRANSITIONS=411} [2024-06-27 23:04:43,054 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 219 predicate places. [2024-06-27 23:04:43,054 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 411 transitions, 5354 flow [2024-06-27 23:04:43,054 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 23:04:43,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:43,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:43,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:04:43,055 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:43,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:43,055 INFO L85 PathProgramCache]: Analyzing trace with hash -53354073, now seen corresponding path program 1 times [2024-06-27 23:04:43,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:43,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417667087] [2024-06-27 23:04:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:43,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:43,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:43,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417667087] [2024-06-27 23:04:43,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417667087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:43,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:43,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:43,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943742951] [2024-06-27 23:04:43,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:43,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:43,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:43,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:43,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:43,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:04:43,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 411 transitions, 5354 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 23:04:43,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:43,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:04:43,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:45,861 INFO L124 PetriNetUnfolderBase]: 8713/13044 cut-off events. [2024-06-27 23:04:45,861 INFO L125 PetriNetUnfolderBase]: For 824333/824341 co-relation queries the response was YES. [2024-06-27 23:04:45,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97728 conditions, 13044 events. 8713/13044 cut-off events. For 824333/824341 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 80674 event pairs, 2522 based on Foata normal form. 32/13073 useless extension candidates. Maximal degree in co-relation 97600. Up to 11476 conditions per place. [2024-06-27 23:04:46,036 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 394 selfloop transitions, 48 changer transitions 0/454 dead transitions. [2024-06-27 23:04:46,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 454 transitions, 6410 flow [2024-06-27 23:04:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:04:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:04:46,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 23:04:46,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906862745098039 [2024-06-27 23:04:46,038 INFO L175 Difference]: Start difference. First operand has 273 places, 411 transitions, 5354 flow. Second operand 8 states and 241 transitions. [2024-06-27 23:04:46,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 454 transitions, 6410 flow [2024-06-27 23:04:47,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 454 transitions, 6326 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 23:04:47,367 INFO L231 Difference]: Finished difference. Result has 275 places, 413 transitions, 5417 flow [2024-06-27 23:04:47,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5270, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5417, PETRI_PLACES=275, PETRI_TRANSITIONS=413} [2024-06-27 23:04:47,367 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 221 predicate places. [2024-06-27 23:04:47,368 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 413 transitions, 5417 flow [2024-06-27 23:04:47,368 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 23:04:47,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:47,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:47,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:04:47,368 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:47,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1085796766, now seen corresponding path program 1 times [2024-06-27 23:04:47,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:47,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420235785] [2024-06-27 23:04:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:47,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:47,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:47,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420235785] [2024-06-27 23:04:47,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420235785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:47,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:47,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:04:47,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230002665] [2024-06-27 23:04:47,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:47,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:04:47,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:47,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:04:47,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:04:47,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:04:47,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 413 transitions, 5417 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 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 23:04:47,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:47,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:04:47,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:50,199 INFO L124 PetriNetUnfolderBase]: 8413/12770 cut-off events. [2024-06-27 23:04:50,199 INFO L125 PetriNetUnfolderBase]: For 828464/828471 co-relation queries the response was YES. [2024-06-27 23:04:50,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96430 conditions, 12770 events. 8413/12770 cut-off events. For 828464/828471 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 80991 event pairs, 2591 based on Foata normal form. 9/12743 useless extension candidates. Maximal degree in co-relation 96300. Up to 11470 conditions per place. [2024-06-27 23:04:50,358 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 351 selfloop transitions, 48 changer transitions 0/437 dead transitions. [2024-06-27 23:04:50,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 437 transitions, 6525 flow [2024-06-27 23:04:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:04:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:04:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 23:04:50,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592156862745098 [2024-06-27 23:04:50,359 INFO L175 Difference]: Start difference. First operand has 275 places, 413 transitions, 5417 flow. Second operand 5 states and 151 transitions. [2024-06-27 23:04:50,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 437 transitions, 6525 flow [2024-06-27 23:04:51,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 437 transitions, 6389 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 23:04:51,727 INFO L231 Difference]: Finished difference. Result has 273 places, 421 transitions, 5557 flow [2024-06-27 23:04:51,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5281, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5557, PETRI_PLACES=273, PETRI_TRANSITIONS=421} [2024-06-27 23:04:51,728 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 219 predicate places. [2024-06-27 23:04:51,728 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 421 transitions, 5557 flow [2024-06-27 23:04:51,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 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 23:04:51,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:51,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:51,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:04:51,729 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:51,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1062583966, now seen corresponding path program 2 times [2024-06-27 23:04:51,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:51,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051542819] [2024-06-27 23:04:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:51,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:51,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:51,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051542819] [2024-06-27 23:04:51,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051542819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:51,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:51,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:04:51,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576959792] [2024-06-27 23:04:51,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:51,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:04:51,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:04:51,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:04:52,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 23:04:52,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 421 transitions, 5557 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 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 23:04:52,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:52,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 23:04:52,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:54,463 INFO L124 PetriNetUnfolderBase]: 8399/12752 cut-off events. [2024-06-27 23:04:54,464 INFO L125 PetriNetUnfolderBase]: For 852951/852958 co-relation queries the response was YES. [2024-06-27 23:04:54,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97258 conditions, 12752 events. 8399/12752 cut-off events. For 852951/852958 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 80970 event pairs, 2591 based on Foata normal form. 9/12725 useless extension candidates. Maximal degree in co-relation 97128. Up to 11470 conditions per place. [2024-06-27 23:04:54,622 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 353 selfloop transitions, 44 changer transitions 0/435 dead transitions. [2024-06-27 23:04:54,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 435 transitions, 6387 flow [2024-06-27 23:04:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:04:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:04:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 23:04:54,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225490196078431 [2024-06-27 23:04:54,623 INFO L175 Difference]: Start difference. First operand has 273 places, 421 transitions, 5557 flow. Second operand 4 states and 127 transitions. [2024-06-27 23:04:54,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 435 transitions, 6387 flow [2024-06-27 23:04:55,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 435 transitions, 6230 flow, removed 62 selfloop flow, removed 1 redundant places. [2024-06-27 23:04:55,869 INFO L231 Difference]: Finished difference. Result has 276 places, 421 transitions, 5509 flow [2024-06-27 23:04:55,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5400, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5509, PETRI_PLACES=276, PETRI_TRANSITIONS=421} [2024-06-27 23:04:55,870 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 222 predicate places. [2024-06-27 23:04:55,870 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 421 transitions, 5509 flow [2024-06-27 23:04:55,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 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 23:04:55,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:55,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:55,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:04:55,871 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:04:55,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:55,871 INFO L85 PathProgramCache]: Analyzing trace with hash 738897178, now seen corresponding path program 1 times [2024-06-27 23:04:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:55,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697043157] [2024-06-27 23:04:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:55,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:56,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:56,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697043157] [2024-06-27 23:04:56,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697043157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:56,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:56,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:04:56,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580713039] [2024-06-27 23:04:56,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:56,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:04:56,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:56,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:04:56,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:04:56,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 23:04:56,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 421 transitions, 5509 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 23:04:56,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:56,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 23:04:56,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:58,458 INFO L124 PetriNetUnfolderBase]: 8575/12759 cut-off events. [2024-06-27 23:04:58,458 INFO L125 PetriNetUnfolderBase]: For 948613/948752 co-relation queries the response was YES. [2024-06-27 23:04:58,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99157 conditions, 12759 events. 8575/12759 cut-off events. For 948613/948752 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 79270 event pairs, 2443 based on Foata normal form. 46/12572 useless extension candidates. Maximal degree in co-relation 99026. Up to 11396 conditions per place. [2024-06-27 23:04:58,646 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 357 selfloop transitions, 21 changer transitions 0/439 dead transitions. [2024-06-27 23:04:58,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 439 transitions, 6373 flow [2024-06-27 23:04:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:04:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:04:59,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 23:04:59,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843137254901961 [2024-06-27 23:04:59,008 INFO L175 Difference]: Start difference. First operand has 276 places, 421 transitions, 5509 flow. Second operand 5 states and 149 transitions. [2024-06-27 23:04:59,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 439 transitions, 6373 flow [2024-06-27 23:05:00,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 439 transitions, 6285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:05:00,134 INFO L231 Difference]: Finished difference. Result has 278 places, 424 transitions, 5521 flow [2024-06-27 23:05:00,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5521, PETRI_PLACES=278, PETRI_TRANSITIONS=424} [2024-06-27 23:05:00,135 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 224 predicate places. [2024-06-27 23:05:00,135 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 424 transitions, 5521 flow [2024-06-27 23:05:00,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 23:05:00,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:05:00,135 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 23:05:00,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:05:00,135 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:05:00,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:05:00,136 INFO L85 PathProgramCache]: Analyzing trace with hash -641831537, now seen corresponding path program 1 times [2024-06-27 23:05:00,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:05:00,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457180376] [2024-06-27 23:05:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:05:00,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:05:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:05:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:05:00,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:05:00,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457180376] [2024-06-27 23:05:00,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457180376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:05:00,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:05:00,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:05:00,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194335221] [2024-06-27 23:05:00,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:05:00,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:05:00,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:05:00,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:05:00,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:05:00,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:05:00,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 424 transitions, 5521 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:05:00,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:05:00,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:05:00,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:05:02,774 INFO L124 PetriNetUnfolderBase]: 9414/13785 cut-off events. [2024-06-27 23:05:02,774 INFO L125 PetriNetUnfolderBase]: For 899203/899233 co-relation queries the response was YES. [2024-06-27 23:05:02,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104290 conditions, 13785 events. 9414/13785 cut-off events. For 899203/899233 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 83152 event pairs, 2696 based on Foata normal form. 25/13805 useless extension candidates. Maximal degree in co-relation 104158. Up to 12220 conditions per place. [2024-06-27 23:05:02,942 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 373 selfloop transitions, 143 changer transitions 0/525 dead transitions. [2024-06-27 23:05:02,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 525 transitions, 7648 flow [2024-06-27 23:05:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:05:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:05:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-27 23:05:02,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151960784313726 [2024-06-27 23:05:02,943 INFO L175 Difference]: Start difference. First operand has 278 places, 424 transitions, 5521 flow. Second operand 8 states and 251 transitions. [2024-06-27 23:05:02,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 525 transitions, 7648 flow [2024-06-27 23:05:04,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 525 transitions, 7570 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 23:05:04,583 INFO L231 Difference]: Finished difference. Result has 286 places, 465 transitions, 6352 flow [2024-06-27 23:05:04,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5445, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6352, PETRI_PLACES=286, PETRI_TRANSITIONS=465} [2024-06-27 23:05:04,584 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 232 predicate places. [2024-06-27 23:05:04,584 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 465 transitions, 6352 flow [2024-06-27 23:05:04,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:05:04,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:05:04,584 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 23:05:04,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:05:04,584 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:05:04,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:05:04,585 INFO L85 PathProgramCache]: Analyzing trace with hash 654549027, now seen corresponding path program 2 times [2024-06-27 23:05:04,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:05:04,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788930821] [2024-06-27 23:05:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:05:04,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:05:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:05:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:05:04,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:05:04,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788930821] [2024-06-27 23:05:04,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788930821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:05:04,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:05:04,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:05:04,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151029047] [2024-06-27 23:05:04,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:05:04,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:05:04,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:05:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:05:04,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:05:04,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 23:05:04,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 465 transitions, 6352 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:05:04,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:05:04,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 23:05:04,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand