./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix032.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix032.oepc.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/mix032.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix032.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:27:40,233 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:27:40,297 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:27:40,301 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:27:40,302 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:27:40,335 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:27:40,336 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:27:40,336 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:27:40,337 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:27:40,338 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:27:40,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:27:40,338 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:27:40,339 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:27:40,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:27:40,339 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:27:40,340 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:27:40,340 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:27:40,340 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:27:40,341 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:27:40,341 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:27:40,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:27:40,342 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:27:40,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:27:40,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:27:40,342 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:27:40,343 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:27:40,343 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:27:40,343 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:27:40,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:27:40,344 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:27:40,344 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:27:40,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:27:40,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:27:40,344 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:27:40,345 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:27:40,345 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:27:40,345 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:27:40,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:27:40,346 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:27:40,346 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:27:40,346 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:27:40,346 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:27:40,347 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:27:40,347 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:27:40,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:27:40,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:27:40,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:27:40,601 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:27:40,601 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:27:40,602 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix032.oepc.i [2024-06-27 18:27:41,672 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:27:41,859 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:27:41,860 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix032.oepc.i [2024-06-27 18:27:41,872 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6861f91eb/a64e7031ff8e46d4912e7a1d59e697e3/FLAG7bf3b9c3a [2024-06-27 18:27:41,941 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6861f91eb/a64e7031ff8e46d4912e7a1d59e697e3 [2024-06-27 18:27:41,943 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:27:41,943 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:27:41,944 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix032.oepc.yml/witness.yml [2024-06-27 18:27:42,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:27:42,100 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:27:42,101 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:27:42,101 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:27:42,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:27:42,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:27:41" (1/2) ... [2024-06-27 18:27:42,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d8b852e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:27:42, skipping insertion in model container [2024-06-27 18:27:42,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:27:41" (1/2) ... [2024-06-27 18:27:42,108 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20e167f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:27:42, skipping insertion in model container [2024-06-27 18:27:42,108 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:27:42" (2/2) ... [2024-06-27 18:27:42,109 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d8b852e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:27:42, skipping insertion in model container [2024-06-27 18:27:42,109 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:27:42" (2/2) ... [2024-06-27 18:27:42,109 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:27:42,202 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:27:42,204 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 18:27:42,204 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 18:27:42,204 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 18:27:42,204 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:27:42,204 INFO L106 edCorrectnessWitness]: ghost_update [L856-L856] multithreaded = 1; [2024-06-27 18:27:42,243 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:27:42,389 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix032.oepc.i[945,958] [2024-06-27 18:27:42,528 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:27:42,536 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:27:42,564 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix032.oepc.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:27:42,640 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:27:42,678 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:27:42,678 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:27:42 WrapperNode [2024-06-27 18:27:42,678 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:27:42,679 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:27:42,679 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:27:42,680 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:27:42,684 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,697 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,718 INFO L138 Inliner]: procedures = 175, calls = 50, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 126 [2024-06-27 18:27:42,719 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:27:42,719 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:27:42,719 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:27:42,720 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:27:42,727 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,728 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,730 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,747 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 18:27:42,754 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,754 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,762 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,768 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,769 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,771 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,773 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:27:42,774 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:27:42,774 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:27:42,774 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:27:42,790 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 06:27:42" (1/1) ... [2024-06-27 18:27:42,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:27:42,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:27:42,817 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 18:27:42,823 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 18:27:42,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:27:42,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:27:42,846 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:27:42,847 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:27:42,847 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:27:42,847 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:27:42,848 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:27:42,848 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:27:42,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:27:42,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:27:42,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:27:42,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:27:42,850 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 18:27:43,002 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:27:43,004 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:27:43,359 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:27:43,360 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:27:43,527 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:27:43,528 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:27:43,529 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:27:43 BoogieIcfgContainer [2024-06-27 18:27:43,529 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:27:43,531 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:27:43,531 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:27:43,534 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:27:43,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:27:41" (1/4) ... [2024-06-27 18:27:43,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231fa681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:27:43, skipping insertion in model container [2024-06-27 18:27:43,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:27:42" (2/4) ... [2024-06-27 18:27:43,536 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231fa681 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:27:43, skipping insertion in model container [2024-06-27 18:27:43,536 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 06:27:42" (3/4) ... [2024-06-27 18:27:43,536 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231fa681 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:27:43, skipping insertion in model container [2024-06-27 18:27:43,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:27:43" (4/4) ... [2024-06-27 18:27:43,538 INFO L112 eAbstractionObserver]: Analyzing ICFG mix032.oepc.i [2024-06-27 18:27:43,552 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:27:43,552 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 18:27:43,552 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:27:43,592 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:27:43,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 50 transitions, 112 flow [2024-06-27 18:27:43,654 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2024-06-27 18:27:43,654 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:27:43,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 47 events. 1/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2024-06-27 18:27:43,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 50 transitions, 112 flow [2024-06-27 18:27:43,661 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 47 transitions, 103 flow [2024-06-27 18:27:43,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:27:43,680 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;@535fbff9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:27:43,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 18:27:43,684 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:27:43,684 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:27:43,685 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:27:43,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:27:43,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:27:43,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:27:43,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:27:43,713 INFO L85 PathProgramCache]: Analyzing trace with hash 347957649, now seen corresponding path program 1 times [2024-06-27 18:27:43,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:27:43,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365733550] [2024-06-27 18:27:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:27:43,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:27:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:27:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:27:44,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:27:44,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365733550] [2024-06-27 18:27:44,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365733550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:27:44,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:27:44,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:27:44,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085364340] [2024-06-27 18:27:44,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:27:44,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:27:44,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:27:44,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:27:44,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:27:44,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-27 18:27:44,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:44,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:27:44,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-27 18:27:44,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:27:45,376 INFO L124 PetriNetUnfolderBase]: 4452/7242 cut-off events. [2024-06-27 18:27:45,376 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 18:27:45,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13715 conditions, 7242 events. 4452/7242 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 48027 event pairs, 3409 based on Foata normal form. 217/6826 useless extension candidates. Maximal degree in co-relation 13703. Up to 6370 conditions per place. [2024-06-27 18:27:45,416 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 42 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-27 18:27:45,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 231 flow [2024-06-27 18:27:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:27:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:27:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-27 18:27:45,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6866666666666666 [2024-06-27 18:27:45,427 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 103 flow. Second operand 3 states and 103 transitions. [2024-06-27 18:27:45,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 231 flow [2024-06-27 18:27:45,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:27:45,432 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 135 flow [2024-06-27 18:27:45,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-27 18:27:45,436 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-06-27 18:27:45,436 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 135 flow [2024-06-27 18:27:45,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:45,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:27:45,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:27:45,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:27:45,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:27:45,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:27:45,438 INFO L85 PathProgramCache]: Analyzing trace with hash 347957972, now seen corresponding path program 1 times [2024-06-27 18:27:45,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:27:45,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396358136] [2024-06-27 18:27:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:27:45,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:27:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:27:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:27:45,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:27:45,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396358136] [2024-06-27 18:27:45,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396358136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:27:45,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:27:45,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:27:45,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119133348] [2024-06-27 18:27:45,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:27:45,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:27:45,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:27:45,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:27:45,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:27:45,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 50 [2024-06-27 18:27:45,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:45,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:27:45,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 50 [2024-06-27 18:27:45,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:27:45,816 INFO L124 PetriNetUnfolderBase]: 978/1922 cut-off events. [2024-06-27 18:27:45,816 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-06-27 18:27:45,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3668 conditions, 1922 events. 978/1922 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13310 event pairs, 610 based on Foata normal form. 0/1777 useless extension candidates. Maximal degree in co-relation 3656. Up to 1259 conditions per place. [2024-06-27 18:27:45,827 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 35 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-06-27 18:27:45,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 238 flow [2024-06-27 18:27:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:27:45,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:27:45,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-06-27 18:27:45,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7933333333333333 [2024-06-27 18:27:45,831 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 135 flow. Second operand 3 states and 119 transitions. [2024-06-27 18:27:45,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 238 flow [2024-06-27 18:27:45,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:27:45,835 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 128 flow [2024-06-27 18:27:45,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-27 18:27:45,835 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-06-27 18:27:45,836 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 128 flow [2024-06-27 18:27:45,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:45,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:27:45,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:27:45,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:27:45,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:27:45,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:27:45,844 INFO L85 PathProgramCache]: Analyzing trace with hash -619836003, now seen corresponding path program 1 times [2024-06-27 18:27:45,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:27:45,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249790207] [2024-06-27 18:27:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:27:45,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:27:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:27:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:27:46,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:27:46,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249790207] [2024-06-27 18:27:46,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249790207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:27:46,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:27:46,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:27:46,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102602532] [2024-06-27 18:27:46,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:27:46,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:27:46,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:27:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:27:46,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:27:46,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-27 18:27:46,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:46,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:27:46,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-27 18:27:46,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:27:47,107 INFO L124 PetriNetUnfolderBase]: 3660/5987 cut-off events. [2024-06-27 18:27:47,108 INFO L125 PetriNetUnfolderBase]: For 1501/1501 co-relation queries the response was YES. [2024-06-27 18:27:47,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12685 conditions, 5987 events. 3660/5987 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 38371 event pairs, 2624 based on Foata normal form. 3/5769 useless extension candidates. Maximal degree in co-relation 12672. Up to 5239 conditions per place. [2024-06-27 18:27:47,133 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 50 selfloop transitions, 8 changer transitions 2/74 dead transitions. [2024-06-27 18:27:47,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 320 flow [2024-06-27 18:27:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:27:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:27:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-27 18:27:47,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-27 18:27:47,135 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 128 flow. Second operand 4 states and 128 transitions. [2024-06-27 18:27:47,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 320 flow [2024-06-27 18:27:47,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:27:47,137 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 189 flow [2024-06-27 18:27:47,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-27 18:27:47,137 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-06-27 18:27:47,138 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 189 flow [2024-06-27 18:27:47,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:47,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:27:47,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:27:47,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:27:47,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:27:47,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:27:47,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1338111132, now seen corresponding path program 1 times [2024-06-27 18:27:47,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:27:47,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210608138] [2024-06-27 18:27:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:27:47,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:27:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:27:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:27:47,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:27:47,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210608138] [2024-06-27 18:27:47,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210608138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:27:47,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:27:47,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:27:47,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377304067] [2024-06-27 18:27:47,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:27:47,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:27:47,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:27:47,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:27:47,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:27:48,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:27:48,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 189 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:48,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:27:48,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:27:48,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:27:48,769 INFO L124 PetriNetUnfolderBase]: 3816/6327 cut-off events. [2024-06-27 18:27:48,769 INFO L125 PetriNetUnfolderBase]: For 2649/2649 co-relation queries the response was YES. [2024-06-27 18:27:48,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14335 conditions, 6327 events. 3816/6327 cut-off events. For 2649/2649 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 41254 event pairs, 2189 based on Foata normal form. 3/6102 useless extension candidates. Maximal degree in co-relation 14320. Up to 5421 conditions per place. [2024-06-27 18:27:48,798 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 71 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-06-27 18:27:48,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 98 transitions, 487 flow [2024-06-27 18:27:48,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:27:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:27:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 18:27:48,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-27 18:27:48,800 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 189 flow. Second operand 6 states and 181 transitions. [2024-06-27 18:27:48,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 98 transitions, 487 flow [2024-06-27 18:27:48,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 98 transitions, 470 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 18:27:48,803 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 252 flow [2024-06-27 18:27:48,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-27 18:27:48,804 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-27 18:27:48,805 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 252 flow [2024-06-27 18:27:48,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:48,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:27:48,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:27:48,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:27:48,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:27:48,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:27:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash -608162239, now seen corresponding path program 1 times [2024-06-27 18:27:48,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:27:48,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890061599] [2024-06-27 18:27:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:27:48,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:27:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:27:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:27:49,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:27:49,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890061599] [2024-06-27 18:27:49,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890061599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:27:49,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:27:49,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:27:49,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316938620] [2024-06-27 18:27:49,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:27:49,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:27:49,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:27:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:27:49,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:27:49,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:27:49,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:49,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:27:49,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:27:49,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:27:50,461 INFO L124 PetriNetUnfolderBase]: 3815/6312 cut-off events. [2024-06-27 18:27:50,461 INFO L125 PetriNetUnfolderBase]: For 5134/5134 co-relation queries the response was YES. [2024-06-27 18:27:50,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15632 conditions, 6312 events. 3815/6312 cut-off events. For 5134/5134 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 41053 event pairs, 1829 based on Foata normal form. 6/6090 useless extension candidates. Maximal degree in co-relation 15614. Up to 5376 conditions per place. [2024-06-27 18:27:50,510 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 78 selfloop transitions, 16 changer transitions 0/107 dead transitions. [2024-06-27 18:27:50,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 566 flow [2024-06-27 18:27:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:27:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:27:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 18:27:50,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885714285714285 [2024-06-27 18:27:50,512 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 252 flow. Second operand 7 states and 206 transitions. [2024-06-27 18:27:50,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 566 flow [2024-06-27 18:27:50,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 107 transitions, 536 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 18:27:50,525 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 273 flow [2024-06-27 18:27:50,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-06-27 18:27:50,527 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-27 18:27:50,527 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 273 flow [2024-06-27 18:27:50,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:50,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:27:50,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:27:50,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:27:50,528 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:27:50,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:27:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1789074477, now seen corresponding path program 1 times [2024-06-27 18:27:50,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:27:50,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459977295] [2024-06-27 18:27:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:27:50,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:27:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:27:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:27:51,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:27:51,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459977295] [2024-06-27 18:27:51,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459977295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:27:51,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:27:51,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:27:51,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819427701] [2024-06-27 18:27:51,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:27:51,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:27:51,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:27:51,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:27:51,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:27:51,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:27:51,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 273 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:51,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:27:51,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:27:51,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:27:52,075 INFO L124 PetriNetUnfolderBase]: 4446/7274 cut-off events. [2024-06-27 18:27:52,075 INFO L125 PetriNetUnfolderBase]: For 8456/8456 co-relation queries the response was YES. [2024-06-27 18:27:52,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18683 conditions, 7274 events. 4446/7274 cut-off events. For 8456/8456 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 47287 event pairs, 2020 based on Foata normal form. 2/7029 useless extension candidates. Maximal degree in co-relation 18663. Up to 6340 conditions per place. [2024-06-27 18:27:52,114 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 60 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-06-27 18:27:52,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 82 transitions, 475 flow [2024-06-27 18:27:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:27:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:27:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 18:27:52,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-06-27 18:27:52,116 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 273 flow. Second operand 5 states and 129 transitions. [2024-06-27 18:27:52,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 82 transitions, 475 flow [2024-06-27 18:27:52,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 434 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 18:27:52,124 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 285 flow [2024-06-27 18:27:52,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-27 18:27:52,126 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-27 18:27:52,126 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 285 flow [2024-06-27 18:27:52,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:52,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:27:52,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:27:52,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:27:52,127 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:27:52,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:27:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash 373267212, now seen corresponding path program 1 times [2024-06-27 18:27:52,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:27:52,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328637107] [2024-06-27 18:27:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:27:52,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:27:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:27:52,718 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 18:27:52,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:27:52,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328637107] [2024-06-27 18:27:52,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328637107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:27:52,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:27:52,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:27:52,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57350492] [2024-06-27 18:27:52,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:27:52,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:27:52,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:27:52,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:27:52,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:27:52,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:27:52,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 285 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 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 18:27:52,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:27:52,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:27:52,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:27:53,689 INFO L124 PetriNetUnfolderBase]: 5234/8533 cut-off events. [2024-06-27 18:27:53,690 INFO L125 PetriNetUnfolderBase]: For 12571/12571 co-relation queries the response was YES. [2024-06-27 18:27:53,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22752 conditions, 8533 events. 5234/8533 cut-off events. For 12571/12571 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 55907 event pairs, 2408 based on Foata normal form. 2/8317 useless extension candidates. Maximal degree in co-relation 22730. Up to 7427 conditions per place. [2024-06-27 18:27:53,746 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 69 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-06-27 18:27:53,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 535 flow [2024-06-27 18:27:53,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:27:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:27:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 18:27:53,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49666666666666665 [2024-06-27 18:27:53,748 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 285 flow. Second operand 6 states and 149 transitions. [2024-06-27 18:27:53,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 535 flow [2024-06-27 18:27:53,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 508 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 18:27:53,757 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 320 flow [2024-06-27 18:27:53,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=320, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-06-27 18:27:53,758 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-06-27 18:27:53,758 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 320 flow [2024-06-27 18:27:53,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 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 18:27:53,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:27:53,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:27:53,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:27:53,759 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:27:53,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:27:53,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1320262511, now seen corresponding path program 1 times [2024-06-27 18:27:53,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:27:53,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516752384] [2024-06-27 18:27:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:27:53,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:27:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:27:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:27:54,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:27:54,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516752384] [2024-06-27 18:27:54,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516752384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:27:54,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:27:54,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:27:54,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473762815] [2024-06-27 18:27:54,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:27:54,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:27:54,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:27:54,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:27:54,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:27:54,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:27:54,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 320 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:54,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:27:54,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:27:54,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:27:55,429 INFO L124 PetriNetUnfolderBase]: 4972/8228 cut-off events. [2024-06-27 18:27:55,430 INFO L125 PetriNetUnfolderBase]: For 16652/16656 co-relation queries the response was YES. [2024-06-27 18:27:55,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23175 conditions, 8228 events. 4972/8228 cut-off events. For 16652/16656 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 54467 event pairs, 1934 based on Foata normal form. 6/7979 useless extension candidates. Maximal degree in co-relation 23152. Up to 7048 conditions per place. [2024-06-27 18:27:55,480 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 77 selfloop transitions, 18 changer transitions 0/107 dead transitions. [2024-06-27 18:27:55,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 675 flow [2024-06-27 18:27:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:27:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:27:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 18:27:55,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-27 18:27:55,482 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 320 flow. Second operand 6 states and 160 transitions. [2024-06-27 18:27:55,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 675 flow [2024-06-27 18:27:55,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 632 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 18:27:55,489 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 410 flow [2024-06-27 18:27:55,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-06-27 18:27:55,489 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-06-27 18:27:55,489 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 410 flow [2024-06-27 18:27:55,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:55,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:27:55,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:27:55,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:27:55,490 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:27:55,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:27:55,491 INFO L85 PathProgramCache]: Analyzing trace with hash -569148941, now seen corresponding path program 2 times [2024-06-27 18:27:55,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:27:55,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098783759] [2024-06-27 18:27:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:27:55,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:27:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:27:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:27:56,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:27:56,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098783759] [2024-06-27 18:27:56,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098783759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:27:56,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:27:56,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:27:56,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585160344] [2024-06-27 18:27:56,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:27:56,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:27:56,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:27:56,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:27:56,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:27:56,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:27:56,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:56,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:27:56,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:27:56,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:27:57,407 INFO L124 PetriNetUnfolderBase]: 4976/8260 cut-off events. [2024-06-27 18:27:57,407 INFO L125 PetriNetUnfolderBase]: For 21837/21837 co-relation queries the response was YES. [2024-06-27 18:27:57,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24785 conditions, 8260 events. 4976/8260 cut-off events. For 21837/21837 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 55488 event pairs, 2172 based on Foata normal form. 2/8031 useless extension candidates. Maximal degree in co-relation 24760. Up to 7100 conditions per place. [2024-06-27 18:27:57,456 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 75 selfloop transitions, 13 changer transitions 0/100 dead transitions. [2024-06-27 18:27:57,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 100 transitions, 644 flow [2024-06-27 18:27:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:27:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:27:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:27:57,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-06-27 18:27:57,458 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 410 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:27:57,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 100 transitions, 644 flow [2024-06-27 18:27:57,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 612 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 18:27:57,474 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 412 flow [2024-06-27 18:27:57,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=412, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-06-27 18:27:57,474 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-27 18:27:57,474 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 412 flow [2024-06-27 18:27:57,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:57,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:27:57,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:27:57,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:27:57,475 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:27:57,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:27:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1313617134, now seen corresponding path program 1 times [2024-06-27 18:27:57,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:27:57,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442103130] [2024-06-27 18:27:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:27:57,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:27:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:27:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:27:58,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:27:58,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442103130] [2024-06-27 18:27:58,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442103130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:27:58,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:27:58,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:27:58,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819006383] [2024-06-27 18:27:58,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:27:58,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:27:58,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:27:58,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:27:58,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:27:58,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:27:58,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 412 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:58,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:27:58,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:27:58,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:27:59,356 INFO L124 PetriNetUnfolderBase]: 5247/8533 cut-off events. [2024-06-27 18:27:59,356 INFO L125 PetriNetUnfolderBase]: For 23340/23340 co-relation queries the response was YES. [2024-06-27 18:27:59,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25531 conditions, 8533 events. 5247/8533 cut-off events. For 23340/23340 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 55818 event pairs, 2266 based on Foata normal form. 4/8313 useless extension candidates. Maximal degree in co-relation 25503. Up to 7411 conditions per place. [2024-06-27 18:27:59,402 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 84 selfloop transitions, 20 changer transitions 0/114 dead transitions. [2024-06-27 18:27:59,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 732 flow [2024-06-27 18:27:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:27:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:27:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 18:27:59,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2024-06-27 18:27:59,404 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 412 flow. Second operand 7 states and 174 transitions. [2024-06-27 18:27:59,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 732 flow [2024-06-27 18:27:59,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 689 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 18:27:59,416 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 449 flow [2024-06-27 18:27:59,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=449, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-27 18:27:59,418 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-27 18:27:59,418 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 449 flow [2024-06-27 18:27:59,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:27:59,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:27:59,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:27:59,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:27:59,419 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:27:59,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:27:59,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1219126502, now seen corresponding path program 1 times [2024-06-27 18:27:59,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:27:59,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583216567] [2024-06-27 18:27:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:27:59,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:27:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:00,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:00,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583216567] [2024-06-27 18:28:00,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583216567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:00,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:00,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:00,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865886314] [2024-06-27 18:28:00,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:00,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:00,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:00,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:00,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:00,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:00,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 449 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:00,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:00,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:00,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:01,424 INFO L124 PetriNetUnfolderBase]: 4980/8209 cut-off events. [2024-06-27 18:28:01,424 INFO L125 PetriNetUnfolderBase]: For 28335/28339 co-relation queries the response was YES. [2024-06-27 18:28:01,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25907 conditions, 8209 events. 4980/8209 cut-off events. For 28335/28339 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 54155 event pairs, 1833 based on Foata normal form. 6/7957 useless extension candidates. Maximal degree in co-relation 25880. Up to 7066 conditions per place. [2024-06-27 18:28:01,467 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 95 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2024-06-27 18:28:01,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 122 transitions, 801 flow [2024-06-27 18:28:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:28:01,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-06-27 18:28:01,469 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 449 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:28:01,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 122 transitions, 801 flow [2024-06-27 18:28:01,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 122 transitions, 745 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 18:28:01,481 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 465 flow [2024-06-27 18:28:01,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=465, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-27 18:28:01,482 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-27 18:28:01,482 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 465 flow [2024-06-27 18:28:01,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:01,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:01,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:01,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:28:01,483 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:01,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2021536084, now seen corresponding path program 2 times [2024-06-27 18:28:01,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:01,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318808950] [2024-06-27 18:28:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:01,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:02,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:02,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318808950] [2024-06-27 18:28:02,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318808950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:02,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:02,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:02,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748420715] [2024-06-27 18:28:02,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:02,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:02,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:02,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:02,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:02,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:02,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 465 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:02,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:02,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:02,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:03,227 INFO L124 PetriNetUnfolderBase]: 5008/8252 cut-off events. [2024-06-27 18:28:03,227 INFO L125 PetriNetUnfolderBase]: For 34192/34202 co-relation queries the response was YES. [2024-06-27 18:28:03,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27202 conditions, 8252 events. 5008/8252 cut-off events. For 34192/34202 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 54445 event pairs, 1841 based on Foata normal form. 12/8006 useless extension candidates. Maximal degree in co-relation 27174. Up to 7024 conditions per place. [2024-06-27 18:28:03,317 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 87 selfloop transitions, 28 changer transitions 0/127 dead transitions. [2024-06-27 18:28:03,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 903 flow [2024-06-27 18:28:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 18:28:03,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342857142857143 [2024-06-27 18:28:03,320 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 465 flow. Second operand 7 states and 187 transitions. [2024-06-27 18:28:03,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 903 flow [2024-06-27 18:28:03,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 127 transitions, 855 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 18:28:03,352 INFO L231 Difference]: Finished difference. Result has 83 places, 89 transitions, 555 flow [2024-06-27 18:28:03,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=555, PETRI_PLACES=83, PETRI_TRANSITIONS=89} [2024-06-27 18:28:03,353 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-27 18:28:03,353 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 89 transitions, 555 flow [2024-06-27 18:28:03,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:03,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:03,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:03,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:28:03,353 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:03,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:03,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2021536270, now seen corresponding path program 1 times [2024-06-27 18:28:03,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:03,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2965589] [2024-06-27 18:28:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:03,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:04,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2965589] [2024-06-27 18:28:04,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2965589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:04,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:04,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:04,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657095344] [2024-06-27 18:28:04,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:04,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:04,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:04,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:04,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 89 transitions, 555 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:04,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:04,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:04,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:05,141 INFO L124 PetriNetUnfolderBase]: 5326/8667 cut-off events. [2024-06-27 18:28:05,142 INFO L125 PetriNetUnfolderBase]: For 40887/40893 co-relation queries the response was YES. [2024-06-27 18:28:05,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29614 conditions, 8667 events. 5326/8667 cut-off events. For 40887/40893 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 56322 event pairs, 1994 based on Foata normal form. 4/8410 useless extension candidates. Maximal degree in co-relation 29585. Up to 7469 conditions per place. [2024-06-27 18:28:05,192 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 101 selfloop transitions, 26 changer transitions 0/137 dead transitions. [2024-06-27 18:28:05,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 137 transitions, 1033 flow [2024-06-27 18:28:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 18:28:05,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171428571428571 [2024-06-27 18:28:05,197 INFO L175 Difference]: Start difference. First operand has 83 places, 89 transitions, 555 flow. Second operand 7 states and 181 transitions. [2024-06-27 18:28:05,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 137 transitions, 1033 flow [2024-06-27 18:28:05,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 137 transitions, 987 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:05,219 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 674 flow [2024-06-27 18:28:05,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=674, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-27 18:28:05,219 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-27 18:28:05,219 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 674 flow [2024-06-27 18:28:05,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:05,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:05,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:05,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:28:05,220 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:05,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:05,221 INFO L85 PathProgramCache]: Analyzing trace with hash -463480856, now seen corresponding path program 2 times [2024-06-27 18:28:05,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:05,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877762202] [2024-06-27 18:28:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:05,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:05,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877762202] [2024-06-27 18:28:05,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877762202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:05,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:05,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:05,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370451464] [2024-06-27 18:28:05,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:05,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:05,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:06,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:06,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 674 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:06,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:06,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:06,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:07,021 INFO L124 PetriNetUnfolderBase]: 5349/8737 cut-off events. [2024-06-27 18:28:07,021 INFO L125 PetriNetUnfolderBase]: For 48739/48739 co-relation queries the response was YES. [2024-06-27 18:28:07,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31420 conditions, 8737 events. 5349/8737 cut-off events. For 48739/48739 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 57609 event pairs, 2239 based on Foata normal form. 2/8510 useless extension candidates. Maximal degree in co-relation 31388. Up to 7582 conditions per place. [2024-06-27 18:28:07,079 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 104 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2024-06-27 18:28:07,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 131 transitions, 1026 flow [2024-06-27 18:28:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 18:28:07,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-27 18:28:07,081 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 674 flow. Second operand 7 states and 170 transitions. [2024-06-27 18:28:07,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 131 transitions, 1026 flow [2024-06-27 18:28:07,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 996 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 18:28:07,109 INFO L231 Difference]: Finished difference. Result has 93 places, 102 transitions, 728 flow [2024-06-27 18:28:07,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=728, PETRI_PLACES=93, PETRI_TRANSITIONS=102} [2024-06-27 18:28:07,110 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-27 18:28:07,110 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 102 transitions, 728 flow [2024-06-27 18:28:07,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:07,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:07,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:07,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:28:07,111 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:07,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:07,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2026177900, now seen corresponding path program 3 times [2024-06-27 18:28:07,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:07,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530730219] [2024-06-27 18:28:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:07,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:07,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:07,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530730219] [2024-06-27 18:28:07,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530730219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:07,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:07,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:07,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761170869] [2024-06-27 18:28:07,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:07,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:07,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:07,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:07,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 102 transitions, 728 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:07,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:07,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:07,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:09,014 INFO L124 PetriNetUnfolderBase]: 5344/8729 cut-off events. [2024-06-27 18:28:09,015 INFO L125 PetriNetUnfolderBase]: For 52437/52437 co-relation queries the response was YES. [2024-06-27 18:28:09,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31722 conditions, 8729 events. 5344/8729 cut-off events. For 52437/52437 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 57503 event pairs, 2235 based on Foata normal form. 2/8502 useless extension candidates. Maximal degree in co-relation 31687. Up to 7543 conditions per place. [2024-06-27 18:28:09,073 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 101 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-27 18:28:09,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 133 transitions, 1058 flow [2024-06-27 18:28:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:28:09,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942857142857143 [2024-06-27 18:28:09,075 INFO L175 Difference]: Start difference. First operand has 93 places, 102 transitions, 728 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:28:09,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 133 transitions, 1058 flow [2024-06-27 18:28:09,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 133 transitions, 978 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 18:28:09,113 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 700 flow [2024-06-27 18:28:09,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=700, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-06-27 18:28:09,114 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-27 18:28:09,114 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 700 flow [2024-06-27 18:28:09,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:09,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:09,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:09,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:28:09,114 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:09,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:09,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2026177714, now seen corresponding path program 3 times [2024-06-27 18:28:09,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:09,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940056261] [2024-06-27 18:28:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:09,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:09,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:09,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940056261] [2024-06-27 18:28:09,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940056261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:09,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:09,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:09,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971684936] [2024-06-27 18:28:09,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:09,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:09,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:09,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:09,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 700 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:09,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:09,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:09,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:10,959 INFO L124 PetriNetUnfolderBase]: 5066/8429 cut-off events. [2024-06-27 18:28:10,959 INFO L125 PetriNetUnfolderBase]: For 55782/55798 co-relation queries the response was YES. [2024-06-27 18:28:10,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30835 conditions, 8429 events. 5066/8429 cut-off events. For 55782/55798 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 56856 event pairs, 2073 based on Foata normal form. 2/8194 useless extension candidates. Maximal degree in co-relation 30800. Up to 7190 conditions per place. [2024-06-27 18:28:11,022 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 101 selfloop transitions, 16 changer transitions 0/133 dead transitions. [2024-06-27 18:28:11,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 1018 flow [2024-06-27 18:28:11,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:28:11,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-06-27 18:28:11,024 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 700 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:28:11,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 1018 flow [2024-06-27 18:28:11,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 930 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 18:28:11,058 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 652 flow [2024-06-27 18:28:11,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=652, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-06-27 18:28:11,059 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-27 18:28:11,061 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 652 flow [2024-06-27 18:28:11,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:11,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:11,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:11,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:28:11,061 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:11,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:11,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1582960103, now seen corresponding path program 1 times [2024-06-27 18:28:11,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:11,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642324134] [2024-06-27 18:28:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:11,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:11,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:11,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642324134] [2024-06-27 18:28:11,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642324134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:11,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:11,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:28:11,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395997224] [2024-06-27 18:28:11,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:11,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:28:11,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:11,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:28:11,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:28:11,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:11,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 652 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:11,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:11,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:11,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:12,606 INFO L124 PetriNetUnfolderBase]: 5464/9232 cut-off events. [2024-06-27 18:28:12,606 INFO L125 PetriNetUnfolderBase]: For 66724/66740 co-relation queries the response was YES. [2024-06-27 18:28:12,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33356 conditions, 9232 events. 5464/9232 cut-off events. For 66724/66740 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 63931 event pairs, 2495 based on Foata normal form. 1/8987 useless extension candidates. Maximal degree in co-relation 33320. Up to 7832 conditions per place. [2024-06-27 18:28:12,659 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 87 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2024-06-27 18:28:12,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 120 transitions, 910 flow [2024-06-27 18:28:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:28:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:28:12,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 18:28:12,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:28:12,661 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 652 flow. Second operand 5 states and 125 transitions. [2024-06-27 18:28:12,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 120 transitions, 910 flow [2024-06-27 18:28:12,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 120 transitions, 862 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:28:12,699 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 661 flow [2024-06-27 18:28:12,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=661, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-27 18:28:12,700 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-27 18:28:12,700 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 661 flow [2024-06-27 18:28:12,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:12,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:12,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:12,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:28:12,701 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:12,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:12,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1760699120, now seen corresponding path program 1 times [2024-06-27 18:28:12,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:12,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257431402] [2024-06-27 18:28:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:12,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:13,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:13,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257431402] [2024-06-27 18:28:13,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257431402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:13,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:13,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:13,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302818798] [2024-06-27 18:28:13,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:13,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:13,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:14,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:14,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:14,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 661 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:14,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:14,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:14,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:15,524 INFO L124 PetriNetUnfolderBase]: 5077/8414 cut-off events. [2024-06-27 18:28:15,525 INFO L125 PetriNetUnfolderBase]: For 65030/65038 co-relation queries the response was YES. [2024-06-27 18:28:15,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32119 conditions, 8414 events. 5077/8414 cut-off events. For 65030/65038 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 55920 event pairs, 1778 based on Foata normal form. 2/8169 useless extension candidates. Maximal degree in co-relation 32082. Up to 7134 conditions per place. [2024-06-27 18:28:15,590 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 129 selfloop transitions, 21 changer transitions 0/166 dead transitions. [2024-06-27 18:28:15,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 166 transitions, 1165 flow [2024-06-27 18:28:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:28:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:28:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 18:28:15,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-06-27 18:28:15,593 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 661 flow. Second operand 9 states and 237 transitions. [2024-06-27 18:28:15,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 166 transitions, 1165 flow [2024-06-27 18:28:15,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 166 transitions, 1132 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:15,639 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 723 flow [2024-06-27 18:28:15,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=723, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-27 18:28:15,641 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-27 18:28:15,641 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 723 flow [2024-06-27 18:28:15,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:15,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:15,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:15,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:28:15,642 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:15,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:15,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1760608755, now seen corresponding path program 1 times [2024-06-27 18:28:15,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:15,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237516444] [2024-06-27 18:28:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:15,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:16,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:16,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237516444] [2024-06-27 18:28:16,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237516444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:16,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:16,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:16,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587079151] [2024-06-27 18:28:16,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:16,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:16,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:16,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:16,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:16,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:16,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 723 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:16,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:16,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:16,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:17,698 INFO L124 PetriNetUnfolderBase]: 5382/8748 cut-off events. [2024-06-27 18:28:17,699 INFO L125 PetriNetUnfolderBase]: For 73912/73912 co-relation queries the response was YES. [2024-06-27 18:28:17,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34717 conditions, 8748 events. 5382/8748 cut-off events. For 73912/73912 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 56724 event pairs, 1895 based on Foata normal form. 2/8500 useless extension candidates. Maximal degree in co-relation 34679. Up to 7591 conditions per place. [2024-06-27 18:28:17,761 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 130 selfloop transitions, 18 changer transitions 0/158 dead transitions. [2024-06-27 18:28:17,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 158 transitions, 1193 flow [2024-06-27 18:28:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:28:17,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-06-27 18:28:17,763 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 723 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:28:17,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 158 transitions, 1193 flow [2024-06-27 18:28:17,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 158 transitions, 1124 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 18:28:17,798 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 744 flow [2024-06-27 18:28:17,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=744, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2024-06-27 18:28:17,799 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-27 18:28:17,799 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 744 flow [2024-06-27 18:28:17,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:17,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:17,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:17,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:28:17,800 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:17,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1756889840, now seen corresponding path program 2 times [2024-06-27 18:28:17,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:17,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851120075] [2024-06-27 18:28:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:17,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:18,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:18,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851120075] [2024-06-27 18:28:18,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851120075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:18,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:18,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:18,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892136712] [2024-06-27 18:28:18,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:18,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:18,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:18,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:18,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:18,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 744 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:18,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:18,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:18,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:19,885 INFO L124 PetriNetUnfolderBase]: 5134/8496 cut-off events. [2024-06-27 18:28:19,886 INFO L125 PetriNetUnfolderBase]: For 83101/83122 co-relation queries the response was YES. [2024-06-27 18:28:19,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34702 conditions, 8496 events. 5134/8496 cut-off events. For 83101/83122 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 56390 event pairs, 1776 based on Foata normal form. 6/8254 useless extension candidates. Maximal degree in co-relation 34663. Up to 7151 conditions per place. [2024-06-27 18:28:19,958 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 110 selfloop transitions, 31 changer transitions 0/158 dead transitions. [2024-06-27 18:28:19,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 158 transitions, 1198 flow [2024-06-27 18:28:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:28:19,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 18:28:19,960 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 744 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:28:19,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 158 transitions, 1198 flow [2024-06-27 18:28:20,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 158 transitions, 1132 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 18:28:20,016 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 800 flow [2024-06-27 18:28:20,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=800, PETRI_PLACES=104, PETRI_TRANSITIONS=114} [2024-06-27 18:28:20,017 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-27 18:28:20,017 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 800 flow [2024-06-27 18:28:20,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:20,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:20,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:20,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:28:20,018 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:20,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash 98792879, now seen corresponding path program 2 times [2024-06-27 18:28:20,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:20,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537966905] [2024-06-27 18:28:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:20,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:20,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:20,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537966905] [2024-06-27 18:28:20,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537966905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:20,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:20,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:20,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432039189] [2024-06-27 18:28:20,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:20,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:20,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:20,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:20,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:20,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 800 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:20,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:20,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:20,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:21,905 INFO L124 PetriNetUnfolderBase]: 5461/8860 cut-off events. [2024-06-27 18:28:21,905 INFO L125 PetriNetUnfolderBase]: For 95545/95549 co-relation queries the response was YES. [2024-06-27 18:28:21,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37763 conditions, 8860 events. 5461/8860 cut-off events. For 95545/95549 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 57334 event pairs, 1905 based on Foata normal form. 3/8614 useless extension candidates. Maximal degree in co-relation 37723. Up to 7487 conditions per place. [2024-06-27 18:28:21,961 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 115 selfloop transitions, 46 changer transitions 0/171 dead transitions. [2024-06-27 18:28:21,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 171 transitions, 1548 flow [2024-06-27 18:28:21,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 18:28:21,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-06-27 18:28:21,981 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 800 flow. Second operand 8 states and 211 transitions. [2024-06-27 18:28:21,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 171 transitions, 1548 flow [2024-06-27 18:28:22,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 171 transitions, 1450 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 18:28:22,043 INFO L231 Difference]: Finished difference. Result has 106 places, 123 transitions, 952 flow [2024-06-27 18:28:22,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=952, PETRI_PLACES=106, PETRI_TRANSITIONS=123} [2024-06-27 18:28:22,043 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-27 18:28:22,043 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 123 transitions, 952 flow [2024-06-27 18:28:22,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:22,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:22,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:22,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:28:22,044 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:22,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1756884105, now seen corresponding path program 3 times [2024-06-27 18:28:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:22,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418142159] [2024-06-27 18:28:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:22,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:22,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:22,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418142159] [2024-06-27 18:28:22,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418142159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:22,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:22,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:22,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048482525] [2024-06-27 18:28:22,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:22,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:22,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:23,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:23,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 123 transitions, 952 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:23,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:23,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:23,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:24,338 INFO L124 PetriNetUnfolderBase]: 5456/8853 cut-off events. [2024-06-27 18:28:24,339 INFO L125 PetriNetUnfolderBase]: For 105436/105440 co-relation queries the response was YES. [2024-06-27 18:28:24,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38840 conditions, 8853 events. 5456/8853 cut-off events. For 105436/105440 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 57360 event pairs, 1905 based on Foata normal form. 3/8607 useless extension candidates. Maximal degree in co-relation 38799. Up to 7482 conditions per place. [2024-06-27 18:28:24,407 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 112 selfloop transitions, 47 changer transitions 0/169 dead transitions. [2024-06-27 18:28:24,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 169 transitions, 1478 flow [2024-06-27 18:28:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 18:28:24,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:28:24,408 INFO L175 Difference]: Start difference. First operand has 106 places, 123 transitions, 952 flow. Second operand 8 states and 208 transitions. [2024-06-27 18:28:24,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 169 transitions, 1478 flow [2024-06-27 18:28:24,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 169 transitions, 1373 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:24,484 INFO L231 Difference]: Finished difference. Result has 111 places, 123 transitions, 949 flow [2024-06-27 18:28:24,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=949, PETRI_PLACES=111, PETRI_TRANSITIONS=123} [2024-06-27 18:28:24,485 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-27 18:28:24,485 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 123 transitions, 949 flow [2024-06-27 18:28:24,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:24,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:24,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:28:24,486 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:24,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:24,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1756883888, now seen corresponding path program 1 times [2024-06-27 18:28:24,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:24,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027482331] [2024-06-27 18:28:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:24,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:25,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:25,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027482331] [2024-06-27 18:28:25,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027482331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:25,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:25,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:25,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601123104] [2024-06-27 18:28:25,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:25,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:25,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:25,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:25,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 123 transitions, 949 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:25,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:25,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:25,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:26,614 INFO L124 PetriNetUnfolderBase]: 5535/8986 cut-off events. [2024-06-27 18:28:26,615 INFO L125 PetriNetUnfolderBase]: For 113669/113673 co-relation queries the response was YES. [2024-06-27 18:28:26,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39901 conditions, 8986 events. 5535/8986 cut-off events. For 113669/113673 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 58239 event pairs, 1784 based on Foata normal form. 5/8735 useless extension candidates. Maximal degree in co-relation 39858. Up to 7651 conditions per place. [2024-06-27 18:28:26,681 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 135 selfloop transitions, 36 changer transitions 0/181 dead transitions. [2024-06-27 18:28:26,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 181 transitions, 1609 flow [2024-06-27 18:28:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:28:26,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225 [2024-06-27 18:28:26,683 INFO L175 Difference]: Start difference. First operand has 111 places, 123 transitions, 949 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:28:26,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 181 transitions, 1609 flow [2024-06-27 18:28:26,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 181 transitions, 1507 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 18:28:26,754 INFO L231 Difference]: Finished difference. Result has 113 places, 133 transitions, 1057 flow [2024-06-27 18:28:26,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1057, PETRI_PLACES=113, PETRI_TRANSITIONS=133} [2024-06-27 18:28:26,755 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-27 18:28:26,755 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 133 transitions, 1057 flow [2024-06-27 18:28:26,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:26,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:26,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:26,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:28:26,755 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:26,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:26,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1491249063, now seen corresponding path program 4 times [2024-06-27 18:28:26,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:26,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338281779] [2024-06-27 18:28:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:26,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:27,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:27,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338281779] [2024-06-27 18:28:27,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338281779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:27,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:27,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:27,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392599133] [2024-06-27 18:28:27,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:27,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:27,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:27,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:27,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:27,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:27,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 133 transitions, 1057 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:27,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:27,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:27,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:28,712 INFO L124 PetriNetUnfolderBase]: 5586/8734 cut-off events. [2024-06-27 18:28:28,712 INFO L125 PetriNetUnfolderBase]: For 127475/127475 co-relation queries the response was YES. [2024-06-27 18:28:28,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41966 conditions, 8734 events. 5586/8734 cut-off events. For 127475/127475 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 54531 event pairs, 2068 based on Foata normal form. 2/8617 useless extension candidates. Maximal degree in co-relation 41921. Up to 7808 conditions per place. [2024-06-27 18:28:28,794 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 140 selfloop transitions, 32 changer transitions 0/182 dead transitions. [2024-06-27 18:28:28,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 182 transitions, 1803 flow [2024-06-27 18:28:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 18:28:28,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-06-27 18:28:28,795 INFO L175 Difference]: Start difference. First operand has 113 places, 133 transitions, 1057 flow. Second operand 8 states and 203 transitions. [2024-06-27 18:28:28,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 182 transitions, 1803 flow [2024-06-27 18:28:28,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 182 transitions, 1757 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:28,988 INFO L231 Difference]: Finished difference. Result has 118 places, 139 transitions, 1191 flow [2024-06-27 18:28:28,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1191, PETRI_PLACES=118, PETRI_TRANSITIONS=139} [2024-06-27 18:28:28,989 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-27 18:28:28,989 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 139 transitions, 1191 flow [2024-06-27 18:28:28,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:28,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:28,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:28,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:28:28,990 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:28,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:28,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1097187783, now seen corresponding path program 5 times [2024-06-27 18:28:28,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:28,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900327863] [2024-06-27 18:28:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:28,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:29,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:29,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900327863] [2024-06-27 18:28:29,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900327863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:29,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:29,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:29,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686096166] [2024-06-27 18:28:29,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:29,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:29,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:29,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:29,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:29,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:29,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 139 transitions, 1191 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:29,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:29,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:29,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:30,952 INFO L124 PetriNetUnfolderBase]: 5581/8738 cut-off events. [2024-06-27 18:28:30,952 INFO L125 PetriNetUnfolderBase]: For 133354/133354 co-relation queries the response was YES. [2024-06-27 18:28:30,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42190 conditions, 8738 events. 5581/8738 cut-off events. For 133354/133354 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 54687 event pairs, 2074 based on Foata normal form. 2/8618 useless extension candidates. Maximal degree in co-relation 42142. Up to 7888 conditions per place. [2024-06-27 18:28:31,017 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 146 selfloop transitions, 20 changer transitions 0/176 dead transitions. [2024-06-27 18:28:31,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 176 transitions, 1625 flow [2024-06-27 18:28:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 18:28:31,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-06-27 18:28:31,019 INFO L175 Difference]: Start difference. First operand has 118 places, 139 transitions, 1191 flow. Second operand 8 states and 194 transitions. [2024-06-27 18:28:31,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 176 transitions, 1625 flow [2024-06-27 18:28:31,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 176 transitions, 1481 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 18:28:31,162 INFO L231 Difference]: Finished difference. Result has 121 places, 139 transitions, 1095 flow [2024-06-27 18:28:31,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1095, PETRI_PLACES=121, PETRI_TRANSITIONS=139} [2024-06-27 18:28:31,163 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-27 18:28:31,163 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 139 transitions, 1095 flow [2024-06-27 18:28:31,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:31,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:31,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:31,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:28:31,164 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:31,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1286709224, now seen corresponding path program 2 times [2024-06-27 18:28:31,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:31,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547575508] [2024-06-27 18:28:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:31,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:32,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:32,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547575508] [2024-06-27 18:28:32,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547575508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:32,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:32,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:32,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357801536] [2024-06-27 18:28:32,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:32,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:32,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:32,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:32,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:32,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:32,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 139 transitions, 1095 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:32,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:32,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:32,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:33,320 INFO L124 PetriNetUnfolderBase]: 5683/8903 cut-off events. [2024-06-27 18:28:33,320 INFO L125 PetriNetUnfolderBase]: For 143191/143191 co-relation queries the response was YES. [2024-06-27 18:28:33,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43181 conditions, 8903 events. 5683/8903 cut-off events. For 143191/143191 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 55836 event pairs, 2081 based on Foata normal form. 4/8781 useless extension candidates. Maximal degree in co-relation 43132. Up to 7962 conditions per place. [2024-06-27 18:28:33,389 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 150 selfloop transitions, 26 changer transitions 0/186 dead transitions. [2024-06-27 18:28:33,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 186 transitions, 1751 flow [2024-06-27 18:28:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 18:28:33,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:28:33,398 INFO L175 Difference]: Start difference. First operand has 121 places, 139 transitions, 1095 flow. Second operand 8 states and 200 transitions. [2024-06-27 18:28:33,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 186 transitions, 1751 flow [2024-06-27 18:28:33,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 186 transitions, 1693 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 18:28:33,521 INFO L231 Difference]: Finished difference. Result has 122 places, 145 transitions, 1199 flow [2024-06-27 18:28:33,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1199, PETRI_PLACES=122, PETRI_TRANSITIONS=145} [2024-06-27 18:28:33,521 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-27 18:28:33,522 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 145 transitions, 1199 flow [2024-06-27 18:28:33,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:33,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:33,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:33,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:28:33,522 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:33,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:33,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1286501617, now seen corresponding path program 6 times [2024-06-27 18:28:33,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:33,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450763505] [2024-06-27 18:28:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:33,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:34,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:34,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450763505] [2024-06-27 18:28:34,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450763505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:34,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:34,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:34,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466674691] [2024-06-27 18:28:34,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:34,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:34,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:34,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:34,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:34,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 145 transitions, 1199 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:34,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:34,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:34,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:35,640 INFO L124 PetriNetUnfolderBase]: 5678/8890 cut-off events. [2024-06-27 18:28:35,641 INFO L125 PetriNetUnfolderBase]: For 150168/150168 co-relation queries the response was YES. [2024-06-27 18:28:35,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43518 conditions, 8890 events. 5678/8890 cut-off events. For 150168/150168 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 55707 event pairs, 2072 based on Foata normal form. 2/8767 useless extension candidates. Maximal degree in co-relation 43468. Up to 7940 conditions per place. [2024-06-27 18:28:35,712 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 141 selfloop transitions, 33 changer transitions 0/184 dead transitions. [2024-06-27 18:28:35,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 184 transitions, 1661 flow [2024-06-27 18:28:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:35,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 18:28:35,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-27 18:28:35,714 INFO L175 Difference]: Start difference. First operand has 122 places, 145 transitions, 1199 flow. Second operand 8 states and 198 transitions. [2024-06-27 18:28:35,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 184 transitions, 1661 flow [2024-06-27 18:28:35,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 184 transitions, 1557 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 18:28:35,903 INFO L231 Difference]: Finished difference. Result has 126 places, 145 transitions, 1169 flow [2024-06-27 18:28:35,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1169, PETRI_PLACES=126, PETRI_TRANSITIONS=145} [2024-06-27 18:28:35,903 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 70 predicate places. [2024-06-27 18:28:35,904 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 145 transitions, 1169 flow [2024-06-27 18:28:35,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:35,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:35,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:35,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:28:35,904 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:35,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:35,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1286716664, now seen corresponding path program 3 times [2024-06-27 18:28:35,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:35,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176735645] [2024-06-27 18:28:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:35,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:36,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:36,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176735645] [2024-06-27 18:28:36,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176735645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:36,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:36,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:36,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754754609] [2024-06-27 18:28:36,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:36,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:36,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:36,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:36,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:36,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:36,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 145 transitions, 1169 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:36,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:36,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:36,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:37,919 INFO L124 PetriNetUnfolderBase]: 5668/8883 cut-off events. [2024-06-27 18:28:37,919 INFO L125 PetriNetUnfolderBase]: For 154577/154577 co-relation queries the response was YES. [2024-06-27 18:28:37,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43500 conditions, 8883 events. 5668/8883 cut-off events. For 154577/154577 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 55726 event pairs, 2084 based on Foata normal form. 4/8761 useless extension candidates. Maximal degree in co-relation 43449. Up to 7996 conditions per place. [2024-06-27 18:28:37,990 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 150 selfloop transitions, 21 changer transitions 0/181 dead transitions. [2024-06-27 18:28:37,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 181 transitions, 1605 flow [2024-06-27 18:28:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 18:28:37,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-06-27 18:28:37,993 INFO L175 Difference]: Start difference. First operand has 126 places, 145 transitions, 1169 flow. Second operand 8 states and 194 transitions. [2024-06-27 18:28:37,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 181 transitions, 1605 flow [2024-06-27 18:28:38,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 181 transitions, 1507 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 18:28:38,142 INFO L231 Difference]: Finished difference. Result has 127 places, 145 transitions, 1121 flow [2024-06-27 18:28:38,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1121, PETRI_PLACES=127, PETRI_TRANSITIONS=145} [2024-06-27 18:28:38,143 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-27 18:28:38,143 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 145 transitions, 1121 flow [2024-06-27 18:28:38,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:38,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:38,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:38,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:28:38,144 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:38,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1286501462, now seen corresponding path program 3 times [2024-06-27 18:28:38,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:38,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943712496] [2024-06-27 18:28:38,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:38,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:38,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:38,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943712496] [2024-06-27 18:28:38,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943712496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:38,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:38,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:38,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876226826] [2024-06-27 18:28:38,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:38,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:38,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:38,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:38,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:39,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:39,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 145 transitions, 1121 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:39,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:39,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:39,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:40,378 INFO L124 PetriNetUnfolderBase]: 5385/8617 cut-off events. [2024-06-27 18:28:40,379 INFO L125 PetriNetUnfolderBase]: For 159331/159381 co-relation queries the response was YES. [2024-06-27 18:28:40,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42022 conditions, 8617 events. 5385/8617 cut-off events. For 159331/159381 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 55644 event pairs, 1953 based on Foata normal form. 2/8472 useless extension candidates. Maximal degree in co-relation 41970. Up to 7572 conditions per place. [2024-06-27 18:28:40,455 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 146 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2024-06-27 18:28:40,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 187 transitions, 1621 flow [2024-06-27 18:28:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:28:40,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-06-27 18:28:40,457 INFO L175 Difference]: Start difference. First operand has 127 places, 145 transitions, 1121 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:28:40,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 187 transitions, 1621 flow [2024-06-27 18:28:40,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 187 transitions, 1564 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 18:28:40,569 INFO L231 Difference]: Finished difference. Result has 128 places, 148 transitions, 1172 flow [2024-06-27 18:28:40,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1172, PETRI_PLACES=128, PETRI_TRANSITIONS=148} [2024-06-27 18:28:40,571 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-27 18:28:40,571 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 148 transitions, 1172 flow [2024-06-27 18:28:40,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:40,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:40,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:40,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:28:40,572 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:40,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1286507414, now seen corresponding path program 4 times [2024-06-27 18:28:40,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:40,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417795251] [2024-06-27 18:28:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:40,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:41,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:41,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417795251] [2024-06-27 18:28:41,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417795251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:41,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:41,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:41,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529990724] [2024-06-27 18:28:41,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:41,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:41,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:41,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:41,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:41,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:41,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 148 transitions, 1172 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:41,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:41,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:41,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:42,566 INFO L124 PetriNetUnfolderBase]: 5658/8859 cut-off events. [2024-06-27 18:28:42,567 INFO L125 PetriNetUnfolderBase]: For 172461/172461 co-relation queries the response was YES. [2024-06-27 18:28:42,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44461 conditions, 8859 events. 5658/8859 cut-off events. For 172461/172461 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 55512 event pairs, 2071 based on Foata normal form. 4/8740 useless extension candidates. Maximal degree in co-relation 44408. Up to 7867 conditions per place. [2024-06-27 18:28:42,649 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 146 selfloop transitions, 33 changer transitions 0/189 dead transitions. [2024-06-27 18:28:42,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 189 transitions, 1652 flow [2024-06-27 18:28:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 18:28:42,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025 [2024-06-27 18:28:42,650 INFO L175 Difference]: Start difference. First operand has 128 places, 148 transitions, 1172 flow. Second operand 8 states and 201 transitions. [2024-06-27 18:28:42,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 189 transitions, 1652 flow [2024-06-27 18:28:42,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 189 transitions, 1546 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 18:28:42,833 INFO L231 Difference]: Finished difference. Result has 130 places, 148 transitions, 1140 flow [2024-06-27 18:28:42,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1140, PETRI_PLACES=130, PETRI_TRANSITIONS=148} [2024-06-27 18:28:42,833 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-27 18:28:42,834 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 148 transitions, 1140 flow [2024-06-27 18:28:42,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:42,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:42,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:42,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:28:42,834 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:42,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1827124606, now seen corresponding path program 1 times [2024-06-27 18:28:42,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:42,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84390619] [2024-06-27 18:28:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:42,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:43,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:43,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84390619] [2024-06-27 18:28:43,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84390619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:43,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:43,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:28:43,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285981467] [2024-06-27 18:28:43,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:43,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:28:43,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:43,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:28:43,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:28:43,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:43,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 148 transitions, 1140 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 18:28:43,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:43,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:43,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:44,823 INFO L124 PetriNetUnfolderBase]: 6534/10268 cut-off events. [2024-06-27 18:28:44,823 INFO L125 PetriNetUnfolderBase]: For 225119/225175 co-relation queries the response was YES. [2024-06-27 18:28:44,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51197 conditions, 10268 events. 6534/10268 cut-off events. For 225119/225175 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 66064 event pairs, 2740 based on Foata normal form. 13/10108 useless extension candidates. Maximal degree in co-relation 51143. Up to 9289 conditions per place. [2024-06-27 18:28:44,914 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 126 selfloop transitions, 14 changer transitions 0/171 dead transitions. [2024-06-27 18:28:44,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 171 transitions, 1506 flow [2024-06-27 18:28:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:28:44,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:28:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 18:28:44,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-06-27 18:28:44,916 INFO L175 Difference]: Start difference. First operand has 130 places, 148 transitions, 1140 flow. Second operand 6 states and 142 transitions. [2024-06-27 18:28:44,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 171 transitions, 1506 flow [2024-06-27 18:28:45,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 171 transitions, 1382 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 18:28:45,157 INFO L231 Difference]: Finished difference. Result has 128 places, 151 transitions, 1082 flow [2024-06-27 18:28:45,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1082, PETRI_PLACES=128, PETRI_TRANSITIONS=151} [2024-06-27 18:28:45,157 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-27 18:28:45,158 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 151 transitions, 1082 flow [2024-06-27 18:28:45,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 18:28:45,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:45,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:45,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:28:45,158 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:45,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1252842705, now seen corresponding path program 1 times [2024-06-27 18:28:45,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:45,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474905350] [2024-06-27 18:28:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:45,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:46,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:46,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474905350] [2024-06-27 18:28:46,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474905350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:46,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:46,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:28:46,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161429910] [2024-06-27 18:28:46,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:46,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:28:46,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:46,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:28:46,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:28:46,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:46,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 151 transitions, 1082 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:46,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:46,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:46,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:47,878 INFO L124 PetriNetUnfolderBase]: 5601/8574 cut-off events. [2024-06-27 18:28:47,878 INFO L125 PetriNetUnfolderBase]: For 213365/213369 co-relation queries the response was YES. [2024-06-27 18:28:47,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46699 conditions, 8574 events. 5601/8574 cut-off events. For 213365/213369 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 52316 event pairs, 1071 based on Foata normal form. 4/8526 useless extension candidates. Maximal degree in co-relation 46645. Up to 7613 conditions per place. [2024-06-27 18:28:47,955 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 175 selfloop transitions, 42 changer transitions 0/240 dead transitions. [2024-06-27 18:28:47,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 240 transitions, 2222 flow [2024-06-27 18:28:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:28:47,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:28:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 284 transitions. [2024-06-27 18:28:47,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163636363636364 [2024-06-27 18:28:47,957 INFO L175 Difference]: Start difference. First operand has 128 places, 151 transitions, 1082 flow. Second operand 11 states and 284 transitions. [2024-06-27 18:28:47,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 240 transitions, 2222 flow [2024-06-27 18:28:48,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 240 transitions, 2178 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 18:28:48,171 INFO L231 Difference]: Finished difference. Result has 137 places, 169 transitions, 1542 flow [2024-06-27 18:28:48,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1542, PETRI_PLACES=137, PETRI_TRANSITIONS=169} [2024-06-27 18:28:48,172 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-27 18:28:48,172 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 169 transitions, 1542 flow [2024-06-27 18:28:48,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:48,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:48,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:48,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:28:48,173 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:48,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash 943113871, now seen corresponding path program 2 times [2024-06-27 18:28:48,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:48,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625703781] [2024-06-27 18:28:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:48,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:49,261 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 18:28:49,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:49,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625703781] [2024-06-27 18:28:49,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625703781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:49,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:49,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:28:49,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439230698] [2024-06-27 18:28:49,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:49,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:28:49,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:49,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:28:49,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:28:49,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:49,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 169 transitions, 1542 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:49,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:49,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:49,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:50,859 INFO L124 PetriNetUnfolderBase]: 5666/8668 cut-off events. [2024-06-27 18:28:50,860 INFO L125 PetriNetUnfolderBase]: For 237362/237366 co-relation queries the response was YES. [2024-06-27 18:28:50,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49811 conditions, 8668 events. 5666/8668 cut-off events. For 237362/237366 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 52810 event pairs, 1420 based on Foata normal form. 4/8620 useless extension candidates. Maximal degree in co-relation 49754. Up to 7803 conditions per place. [2024-06-27 18:28:50,949 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 178 selfloop transitions, 44 changer transitions 0/245 dead transitions. [2024-06-27 18:28:50,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 245 transitions, 2340 flow [2024-06-27 18:28:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:28:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:28:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 18:28:50,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528 [2024-06-27 18:28:50,951 INFO L175 Difference]: Start difference. First operand has 137 places, 169 transitions, 1542 flow. Second operand 10 states and 264 transitions. [2024-06-27 18:28:50,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 245 transitions, 2340 flow [2024-06-27 18:28:51,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 245 transitions, 2026 flow, removed 150 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:51,279 INFO L231 Difference]: Finished difference. Result has 144 places, 177 transitions, 1476 flow [2024-06-27 18:28:51,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1476, PETRI_PLACES=144, PETRI_TRANSITIONS=177} [2024-06-27 18:28:51,280 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-06-27 18:28:51,280 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 177 transitions, 1476 flow [2024-06-27 18:28:51,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:51,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:51,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:51,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:28:51,281 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:51,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:51,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1236975671, now seen corresponding path program 1 times [2024-06-27 18:28:51,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:51,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726312250] [2024-06-27 18:28:51,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:51,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:52,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:52,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726312250] [2024-06-27 18:28:52,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726312250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:52,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:52,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:28:52,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163784779] [2024-06-27 18:28:52,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:52,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:28:52,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:28:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:28:52,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:52,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 177 transitions, 1476 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:28:52,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:52,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:52,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:53,992 INFO L124 PetriNetUnfolderBase]: 6013/9344 cut-off events. [2024-06-27 18:28:53,992 INFO L125 PetriNetUnfolderBase]: For 248204/248204 co-relation queries the response was YES. [2024-06-27 18:28:54,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52133 conditions, 9344 events. 6013/9344 cut-off events. For 248204/248204 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 58470 event pairs, 1738 based on Foata normal form. 2/9185 useless extension candidates. Maximal degree in co-relation 52075. Up to 8341 conditions per place. [2024-06-27 18:28:54,081 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 213 selfloop transitions, 30 changer transitions 0/254 dead transitions. [2024-06-27 18:28:54,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 254 transitions, 2250 flow [2024-06-27 18:28:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:28:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:28:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2024-06-27 18:28:54,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036363636363637 [2024-06-27 18:28:54,083 INFO L175 Difference]: Start difference. First operand has 144 places, 177 transitions, 1476 flow. Second operand 11 states and 277 transitions. [2024-06-27 18:28:54,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 254 transitions, 2250 flow [2024-06-27 18:28:54,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 254 transitions, 2130 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 18:28:54,276 INFO L231 Difference]: Finished difference. Result has 148 places, 180 transitions, 1492 flow [2024-06-27 18:28:54,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1492, PETRI_PLACES=148, PETRI_TRANSITIONS=180} [2024-06-27 18:28:54,277 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-27 18:28:54,277 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 180 transitions, 1492 flow [2024-06-27 18:28:54,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:28:54,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:54,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:54,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:28:54,277 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:54,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:54,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1255699665, now seen corresponding path program 3 times [2024-06-27 18:28:54,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:54,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111362425] [2024-06-27 18:28:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:54,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:55,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:55,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111362425] [2024-06-27 18:28:55,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111362425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:55,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:55,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:28:55,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270163134] [2024-06-27 18:28:55,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:55,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:28:55,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:55,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:28:55,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:28:55,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:55,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 180 transitions, 1492 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:55,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:55,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:55,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:56,951 INFO L124 PetriNetUnfolderBase]: 5729/9084 cut-off events. [2024-06-27 18:28:56,951 INFO L125 PetriNetUnfolderBase]: For 261097/261130 co-relation queries the response was YES. [2024-06-27 18:28:56,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51235 conditions, 9084 events. 5729/9084 cut-off events. For 261097/261130 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 58396 event pairs, 1658 based on Foata normal form. 4/8913 useless extension candidates. Maximal degree in co-relation 51176. Up to 7950 conditions per place. [2024-06-27 18:28:57,034 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 194 selfloop transitions, 20 changer transitions 0/238 dead transitions. [2024-06-27 18:28:57,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 238 transitions, 2136 flow [2024-06-27 18:28:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:28:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:28:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:28:57,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:28:57,037 INFO L175 Difference]: Start difference. First operand has 148 places, 180 transitions, 1492 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:28:57,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 238 transitions, 2136 flow [2024-06-27 18:28:57,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 238 transitions, 1954 flow, removed 64 selfloop flow, removed 9 redundant places. [2024-06-27 18:28:57,262 INFO L231 Difference]: Finished difference. Result has 148 places, 182 transitions, 1407 flow [2024-06-27 18:28:57,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1407, PETRI_PLACES=148, PETRI_TRANSITIONS=182} [2024-06-27 18:28:57,263 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-27 18:28:57,263 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 182 transitions, 1407 flow [2024-06-27 18:28:57,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:57,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:57,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:57,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:28:57,264 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:57,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:57,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1255704625, now seen corresponding path program 1 times [2024-06-27 18:28:57,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:57,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676939544] [2024-06-27 18:28:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:57,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:58,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:58,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676939544] [2024-06-27 18:28:58,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676939544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:58,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:58,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:28:58,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452574335] [2024-06-27 18:28:58,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:58,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:28:58,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:58,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:28:58,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:28:58,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:58,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 182 transitions, 1407 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:28:58,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:58,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:58,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:59,572 INFO L124 PetriNetUnfolderBase]: 6067/9473 cut-off events. [2024-06-27 18:28:59,580 INFO L125 PetriNetUnfolderBase]: For 275556/275556 co-relation queries the response was YES. [2024-06-27 18:28:59,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53407 conditions, 9473 events. 6067/9473 cut-off events. For 275556/275556 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 59593 event pairs, 1723 based on Foata normal form. 4/9295 useless extension candidates. Maximal degree in co-relation 53347. Up to 8476 conditions per place. [2024-06-27 18:28:59,651 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 209 selfloop transitions, 21 changer transitions 0/241 dead transitions. [2024-06-27 18:28:59,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 241 transitions, 2099 flow [2024-06-27 18:28:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:28:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:28:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 18:28:59,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2024-06-27 18:28:59,653 INFO L175 Difference]: Start difference. First operand has 148 places, 182 transitions, 1407 flow. Second operand 9 states and 227 transitions. [2024-06-27 18:28:59,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 241 transitions, 2099 flow [2024-06-27 18:28:59,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 241 transitions, 2060 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 18:28:59,829 INFO L231 Difference]: Finished difference. Result has 151 places, 185 transitions, 1484 flow [2024-06-27 18:28:59,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1484, PETRI_PLACES=151, PETRI_TRANSITIONS=185} [2024-06-27 18:28:59,830 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-27 18:28:59,830 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 185 transitions, 1484 flow [2024-06-27 18:28:59,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:28:59,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:59,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:59,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:28:59,831 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:59,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1370990959, now seen corresponding path program 2 times [2024-06-27 18:28:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:59,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567774919] [2024-06-27 18:28:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:59,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:00,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:00,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567774919] [2024-06-27 18:29:00,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567774919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:00,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:00,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:00,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752831774] [2024-06-27 18:29:00,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:00,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:00,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:01,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:01,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 185 transitions, 1484 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:01,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:01,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:01,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:02,488 INFO L124 PetriNetUnfolderBase]: 6111/9465 cut-off events. [2024-06-27 18:29:02,488 INFO L125 PetriNetUnfolderBase]: For 294470/294474 co-relation queries the response was YES. [2024-06-27 18:29:02,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55214 conditions, 9465 events. 6111/9465 cut-off events. For 294470/294474 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 59035 event pairs, 1727 based on Foata normal form. 3/9309 useless extension candidates. Maximal degree in co-relation 55153. Up to 8282 conditions per place. [2024-06-27 18:29:02,573 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 181 selfloop transitions, 61 changer transitions 0/253 dead transitions. [2024-06-27 18:29:02,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 253 transitions, 2430 flow [2024-06-27 18:29:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:29:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:29:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 18:29:02,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-06-27 18:29:02,575 INFO L175 Difference]: Start difference. First operand has 151 places, 185 transitions, 1484 flow. Second operand 10 states and 258 transitions. [2024-06-27 18:29:02,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 253 transitions, 2430 flow [2024-06-27 18:29:02,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 253 transitions, 2338 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 18:29:02,983 INFO L231 Difference]: Finished difference. Result has 154 places, 191 transitions, 1665 flow [2024-06-27 18:29:02,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1665, PETRI_PLACES=154, PETRI_TRANSITIONS=191} [2024-06-27 18:29:02,983 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-27 18:29:02,983 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 191 transitions, 1665 flow [2024-06-27 18:29:02,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:02,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:02,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:02,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:29:02,984 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:02,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:02,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1370990835, now seen corresponding path program 4 times [2024-06-27 18:29:02,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:02,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991885977] [2024-06-27 18:29:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:02,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:04,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:04,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991885977] [2024-06-27 18:29:04,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991885977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:04,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:04,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:04,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839149400] [2024-06-27 18:29:04,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:04,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:04,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:04,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:04,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:04,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:29:04,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 191 transitions, 1665 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:04,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:04,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:29:04,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:05,533 INFO L124 PetriNetUnfolderBase]: 5858/9277 cut-off events. [2024-06-27 18:29:05,534 INFO L125 PetriNetUnfolderBase]: For 314157/314185 co-relation queries the response was YES. [2024-06-27 18:29:05,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54879 conditions, 9277 events. 5858/9277 cut-off events. For 314157/314185 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 59681 event pairs, 1641 based on Foata normal form. 10/9106 useless extension candidates. Maximal degree in co-relation 54817. Up to 8038 conditions per place. [2024-06-27 18:29:05,631 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 187 selfloop transitions, 33 changer transitions 0/246 dead transitions. [2024-06-27 18:29:05,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 246 transitions, 2329 flow [2024-06-27 18:29:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 18:29:05,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-27 18:29:05,634 INFO L175 Difference]: Start difference. First operand has 154 places, 191 transitions, 1665 flow. Second operand 9 states and 235 transitions. [2024-06-27 18:29:05,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 246 transitions, 2329 flow [2024-06-27 18:29:05,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 246 transitions, 2188 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 18:29:05,934 INFO L231 Difference]: Finished difference. Result has 157 places, 193 transitions, 1663 flow [2024-06-27 18:29:05,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1663, PETRI_PLACES=157, PETRI_TRANSITIONS=193} [2024-06-27 18:29:05,934 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 101 predicate places. [2024-06-27 18:29:05,935 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 193 transitions, 1663 flow [2024-06-27 18:29:05,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:05,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:05,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:05,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:29:05,935 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:05,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:05,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1370995795, now seen corresponding path program 2 times [2024-06-27 18:29:05,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:05,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915112444] [2024-06-27 18:29:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:05,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:06,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:06,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915112444] [2024-06-27 18:29:06,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915112444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:06,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:06,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:06,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398532529] [2024-06-27 18:29:06,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:06,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:06,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:06,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:06,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:06,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:06,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 193 transitions, 1663 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:06,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:06,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:06,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:08,201 INFO L124 PetriNetUnfolderBase]: 6290/9791 cut-off events. [2024-06-27 18:29:08,201 INFO L125 PetriNetUnfolderBase]: For 345498/345502 co-relation queries the response was YES. [2024-06-27 18:29:08,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59610 conditions, 9791 events. 6290/9791 cut-off events. For 345498/345502 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 61648 event pairs, 1668 based on Foata normal form. 5/9614 useless extension candidates. Maximal degree in co-relation 59546. Up to 8213 conditions per place. [2024-06-27 18:29:08,294 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 183 selfloop transitions, 68 changer transitions 0/262 dead transitions. [2024-06-27 18:29:08,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 262 transitions, 2847 flow [2024-06-27 18:29:08,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-27 18:29:08,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-27 18:29:08,303 INFO L175 Difference]: Start difference. First operand has 157 places, 193 transitions, 1663 flow. Second operand 9 states and 243 transitions. [2024-06-27 18:29:08,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 262 transitions, 2847 flow [2024-06-27 18:29:08,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 262 transitions, 2726 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 18:29:08,633 INFO L231 Difference]: Finished difference. Result has 159 places, 202 transitions, 1902 flow [2024-06-27 18:29:08,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1902, PETRI_PLACES=159, PETRI_TRANSITIONS=202} [2024-06-27 18:29:08,635 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-27 18:29:08,635 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 202 transitions, 1902 flow [2024-06-27 18:29:08,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:08,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:08,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:08,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:29:08,636 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:08,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1371175285, now seen corresponding path program 3 times [2024-06-27 18:29:08,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:08,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475393113] [2024-06-27 18:29:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:08,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:09,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:09,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475393113] [2024-06-27 18:29:09,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475393113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:09,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:09,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:09,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108982825] [2024-06-27 18:29:09,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:09,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:09,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:09,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:09,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:09,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:09,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 202 transitions, 1902 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:09,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:09,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:09,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:10,793 INFO L124 PetriNetUnfolderBase]: 6336/9864 cut-off events. [2024-06-27 18:29:10,794 INFO L125 PetriNetUnfolderBase]: For 366339/366343 co-relation queries the response was YES. [2024-06-27 18:29:10,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61405 conditions, 9864 events. 6336/9864 cut-off events. For 366339/366343 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 62096 event pairs, 1670 based on Foata normal form. 5/9687 useless extension candidates. Maximal degree in co-relation 61340. Up to 8252 conditions per place. [2024-06-27 18:29:10,887 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 179 selfloop transitions, 74 changer transitions 0/264 dead transitions. [2024-06-27 18:29:10,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 264 transitions, 2960 flow [2024-06-27 18:29:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 18:29:10,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-27 18:29:10,888 INFO L175 Difference]: Start difference. First operand has 159 places, 202 transitions, 1902 flow. Second operand 9 states and 240 transitions. [2024-06-27 18:29:10,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 264 transitions, 2960 flow [2024-06-27 18:29:11,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 264 transitions, 2836 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 18:29:11,278 INFO L231 Difference]: Finished difference. Result has 164 places, 205 transitions, 2010 flow [2024-06-27 18:29:11,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2010, PETRI_PLACES=164, PETRI_TRANSITIONS=205} [2024-06-27 18:29:11,278 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 108 predicate places. [2024-06-27 18:29:11,278 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 205 transitions, 2010 flow [2024-06-27 18:29:11,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:11,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:11,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:11,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:29:11,279 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:11,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash 21139121, now seen corresponding path program 4 times [2024-06-27 18:29:11,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:11,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172172967] [2024-06-27 18:29:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:11,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:12,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:12,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172172967] [2024-06-27 18:29:12,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172172967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:12,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:12,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368985322] [2024-06-27 18:29:12,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:12,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:12,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:12,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:12,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 205 transitions, 2010 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:12,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:12,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:12,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:13,533 INFO L124 PetriNetUnfolderBase]: 6326/9850 cut-off events. [2024-06-27 18:29:13,533 INFO L125 PetriNetUnfolderBase]: For 372570/372574 co-relation queries the response was YES. [2024-06-27 18:29:13,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61569 conditions, 9850 events. 6326/9850 cut-off events. For 372570/372574 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 62033 event pairs, 1667 based on Foata normal form. 5/9673 useless extension candidates. Maximal degree in co-relation 61502. Up to 8244 conditions per place. [2024-06-27 18:29:13,624 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 180 selfloop transitions, 72 changer transitions 0/263 dead transitions. [2024-06-27 18:29:13,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 263 transitions, 2846 flow [2024-06-27 18:29:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 18:29:13,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-27 18:29:13,626 INFO L175 Difference]: Start difference. First operand has 164 places, 205 transitions, 2010 flow. Second operand 9 states and 240 transitions. [2024-06-27 18:29:13,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 263 transitions, 2846 flow [2024-06-27 18:29:14,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 263 transitions, 2614 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 18:29:14,023 INFO L231 Difference]: Finished difference. Result has 167 places, 205 transitions, 1930 flow [2024-06-27 18:29:14,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1930, PETRI_PLACES=167, PETRI_TRANSITIONS=205} [2024-06-27 18:29:14,023 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-06-27 18:29:14,024 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 205 transitions, 1930 flow [2024-06-27 18:29:14,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:14,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:14,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:14,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:29:14,024 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:14,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1061379305, now seen corresponding path program 3 times [2024-06-27 18:29:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:14,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455498357] [2024-06-27 18:29:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:14,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:15,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:15,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455498357] [2024-06-27 18:29:15,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455498357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:15,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:15,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:15,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250954557] [2024-06-27 18:29:15,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:15,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:15,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:15,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:15,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:15,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:15,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 205 transitions, 1930 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:15,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:15,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:15,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:16,599 INFO L124 PetriNetUnfolderBase]: 6314/9793 cut-off events. [2024-06-27 18:29:16,599 INFO L125 PetriNetUnfolderBase]: For 378181/378185 co-relation queries the response was YES. [2024-06-27 18:29:16,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61086 conditions, 9793 events. 6314/9793 cut-off events. For 378181/378185 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 61470 event pairs, 1758 based on Foata normal form. 3/9626 useless extension candidates. Maximal degree in co-relation 61018. Up to 8613 conditions per place. [2024-06-27 18:29:16,698 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 190 selfloop transitions, 56 changer transitions 0/257 dead transitions. [2024-06-27 18:29:16,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 257 transitions, 2582 flow [2024-06-27 18:29:16,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:16,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 18:29:16,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-27 18:29:16,699 INFO L175 Difference]: Start difference. First operand has 167 places, 205 transitions, 1930 flow. Second operand 9 states and 230 transitions. [2024-06-27 18:29:16,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 257 transitions, 2582 flow [2024-06-27 18:29:17,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 257 transitions, 2372 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 18:29:17,005 INFO L231 Difference]: Finished difference. Result has 167 places, 205 transitions, 1840 flow [2024-06-27 18:29:17,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1840, PETRI_PLACES=167, PETRI_TRANSITIONS=205} [2024-06-27 18:29:17,006 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-06-27 18:29:17,006 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 205 transitions, 1840 flow [2024-06-27 18:29:17,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:17,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:17,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:17,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:29:17,007 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:17,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash 792017765, now seen corresponding path program 1 times [2024-06-27 18:29:17,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:17,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873354769] [2024-06-27 18:29:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:17,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:17,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:17,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873354769] [2024-06-27 18:29:17,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873354769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:17,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:17,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:29:17,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019254172] [2024-06-27 18:29:17,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:17,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:29:17,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:17,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:29:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:29:17,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:29:17,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 205 transitions, 1840 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:17,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:17,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:29:17,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:19,086 INFO L124 PetriNetUnfolderBase]: 6545/10470 cut-off events. [2024-06-27 18:29:19,087 INFO L125 PetriNetUnfolderBase]: For 436705/436752 co-relation queries the response was YES. [2024-06-27 18:29:19,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63967 conditions, 10470 events. 6545/10470 cut-off events. For 436705/436752 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 69075 event pairs, 2070 based on Foata normal form. 10/10223 useless extension candidates. Maximal degree in co-relation 63898. Up to 9106 conditions per place. [2024-06-27 18:29:19,179 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 184 selfloop transitions, 20 changer transitions 0/241 dead transitions. [2024-06-27 18:29:19,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 241 transitions, 2506 flow [2024-06-27 18:29:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:29:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:29:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 18:29:19,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-27 18:29:19,187 INFO L175 Difference]: Start difference. First operand has 167 places, 205 transitions, 1840 flow. Second operand 6 states and 155 transitions. [2024-06-27 18:29:19,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 241 transitions, 2506 flow [2024-06-27 18:29:19,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 241 transitions, 2386 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 18:29:19,521 INFO L231 Difference]: Finished difference. Result has 166 places, 215 transitions, 1889 flow [2024-06-27 18:29:19,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1889, PETRI_PLACES=166, PETRI_TRANSITIONS=215} [2024-06-27 18:29:19,523 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-06-27 18:29:19,523 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 215 transitions, 1889 flow [2024-06-27 18:29:19,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:19,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:19,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:19,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:29:19,523 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:19,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:19,524 INFO L85 PathProgramCache]: Analyzing trace with hash -346909403, now seen corresponding path program 5 times [2024-06-27 18:29:19,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:19,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312643333] [2024-06-27 18:29:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:19,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:20,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:20,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312643333] [2024-06-27 18:29:20,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312643333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:20,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:20,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140272398] [2024-06-27 18:29:20,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:20,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:20,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:20,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:20,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:20,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:20,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 215 transitions, 1889 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:20,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:20,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:20,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:22,234 INFO L124 PetriNetUnfolderBase]: 6575/10232 cut-off events. [2024-06-27 18:29:22,234 INFO L125 PetriNetUnfolderBase]: For 430799/430799 co-relation queries the response was YES. [2024-06-27 18:29:22,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65607 conditions, 10232 events. 6575/10232 cut-off events. For 430799/430799 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 64963 event pairs, 2072 based on Foata normal form. 4/10065 useless extension candidates. Maximal degree in co-relation 65536. Up to 9014 conditions per place. [2024-06-27 18:29:22,323 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 229 selfloop transitions, 36 changer transitions 0/276 dead transitions. [2024-06-27 18:29:22,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 276 transitions, 3125 flow [2024-06-27 18:29:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 18:29:22,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-06-27 18:29:22,325 INFO L175 Difference]: Start difference. First operand has 166 places, 215 transitions, 1889 flow. Second operand 9 states and 229 transitions. [2024-06-27 18:29:22,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 276 transitions, 3125 flow [2024-06-27 18:29:22,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 276 transitions, 3091 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-27 18:29:22,605 INFO L231 Difference]: Finished difference. Result has 174 places, 224 transitions, 2169 flow [2024-06-27 18:29:22,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2169, PETRI_PLACES=174, PETRI_TRANSITIONS=224} [2024-06-27 18:29:22,606 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 118 predicate places. [2024-06-27 18:29:22,607 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 224 transitions, 2169 flow [2024-06-27 18:29:22,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:22,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:22,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:22,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:29:22,609 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:22,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1774830069, now seen corresponding path program 6 times [2024-06-27 18:29:22,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:22,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590317611] [2024-06-27 18:29:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:22,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:23,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:23,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590317611] [2024-06-27 18:29:23,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590317611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:23,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:23,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:23,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566317932] [2024-06-27 18:29:23,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:23,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:23,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:23,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:23,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:23,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 224 transitions, 2169 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:23,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:23,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:23,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:25,203 INFO L124 PetriNetUnfolderBase]: 6565/10220 cut-off events. [2024-06-27 18:29:25,204 INFO L125 PetriNetUnfolderBase]: For 443615/443615 co-relation queries the response was YES. [2024-06-27 18:29:25,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65922 conditions, 10220 events. 6565/10220 cut-off events. For 443615/443615 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 64927 event pairs, 2078 based on Foata normal form. 4/10053 useless extension candidates. Maximal degree in co-relation 65848. Up to 9155 conditions per place. [2024-06-27 18:29:25,306 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 234 selfloop transitions, 24 changer transitions 0/269 dead transitions. [2024-06-27 18:29:25,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 269 transitions, 2813 flow [2024-06-27 18:29:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-27 18:29:25,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2024-06-27 18:29:25,311 INFO L175 Difference]: Start difference. First operand has 174 places, 224 transitions, 2169 flow. Second operand 9 states and 219 transitions. [2024-06-27 18:29:25,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 269 transitions, 2813 flow [2024-06-27 18:29:25,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 269 transitions, 2659 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-27 18:29:25,700 INFO L231 Difference]: Finished difference. Result has 179 places, 224 transitions, 2071 flow [2024-06-27 18:29:25,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2071, PETRI_PLACES=179, PETRI_TRANSITIONS=224} [2024-06-27 18:29:25,700 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 123 predicate places. [2024-06-27 18:29:25,700 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 224 transitions, 2071 flow [2024-06-27 18:29:25,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:25,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:25,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:25,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:29:25,701 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:25,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:25,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1765655619, now seen corresponding path program 7 times [2024-06-27 18:29:25,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:25,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875003022] [2024-06-27 18:29:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:25,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:26,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:26,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875003022] [2024-06-27 18:29:26,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875003022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:26,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:26,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:26,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455786089] [2024-06-27 18:29:26,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:26,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:26,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:26,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:26,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 224 transitions, 2071 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:26,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:26,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:26,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:28,279 INFO L124 PetriNetUnfolderBase]: 6555/10203 cut-off events. [2024-06-27 18:29:28,279 INFO L125 PetriNetUnfolderBase]: For 445768/445768 co-relation queries the response was YES. [2024-06-27 18:29:28,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65274 conditions, 10203 events. 6555/10203 cut-off events. For 445768/445768 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 64827 event pairs, 2055 based on Foata normal form. 4/10036 useless extension candidates. Maximal degree in co-relation 65198. Up to 8998 conditions per place. [2024-06-27 18:29:28,361 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 224 selfloop transitions, 37 changer transitions 0/272 dead transitions. [2024-06-27 18:29:28,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 272 transitions, 2739 flow [2024-06-27 18:29:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-27 18:29:28,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49777777777777776 [2024-06-27 18:29:28,362 INFO L175 Difference]: Start difference. First operand has 179 places, 224 transitions, 2071 flow. Second operand 9 states and 224 transitions. [2024-06-27 18:29:28,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 272 transitions, 2739 flow [2024-06-27 18:29:28,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 272 transitions, 2629 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 18:29:28,729 INFO L231 Difference]: Finished difference. Result has 180 places, 224 transitions, 2043 flow [2024-06-27 18:29:28,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2043, PETRI_PLACES=180, PETRI_TRANSITIONS=224} [2024-06-27 18:29:28,730 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 124 predicate places. [2024-06-27 18:29:28,730 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 224 transitions, 2043 flow [2024-06-27 18:29:28,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:28,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:28,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:28,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:29:28,731 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:28,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:28,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1765655433, now seen corresponding path program 4 times [2024-06-27 18:29:28,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:28,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818815168] [2024-06-27 18:29:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:28,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:29,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:29,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818815168] [2024-06-27 18:29:29,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818815168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:29,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:29,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:29,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182303975] [2024-06-27 18:29:29,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:29,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:29,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:29,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:29,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:29,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:29,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 224 transitions, 2043 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:29,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:29,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:29,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:31,614 INFO L124 PetriNetUnfolderBase]: 6588/10271 cut-off events. [2024-06-27 18:29:31,614 INFO L125 PetriNetUnfolderBase]: For 459631/459631 co-relation queries the response was YES. [2024-06-27 18:29:31,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65986 conditions, 10271 events. 6588/10271 cut-off events. For 459631/459631 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 65489 event pairs, 2074 based on Foata normal form. 2/10096 useless extension candidates. Maximal degree in co-relation 65909. Up to 9208 conditions per place. [2024-06-27 18:29:31,716 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 235 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2024-06-27 18:29:31,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 281 transitions, 2955 flow [2024-06-27 18:29:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 18:29:31,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4911111111111111 [2024-06-27 18:29:31,718 INFO L175 Difference]: Start difference. First operand has 180 places, 224 transitions, 2043 flow. Second operand 9 states and 221 transitions. [2024-06-27 18:29:31,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 281 transitions, 2955 flow [2024-06-27 18:29:32,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 281 transitions, 2873 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 18:29:32,075 INFO L231 Difference]: Finished difference. Result has 183 places, 233 transitions, 2298 flow [2024-06-27 18:29:32,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2298, PETRI_PLACES=183, PETRI_TRANSITIONS=233} [2024-06-27 18:29:32,075 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 127 predicate places. [2024-06-27 18:29:32,075 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 233 transitions, 2298 flow [2024-06-27 18:29:32,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:32,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:32,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:32,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:29:32,076 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:32,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash -602516183, now seen corresponding path program 8 times [2024-06-27 18:29:32,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:32,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042596639] [2024-06-27 18:29:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:32,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:33,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:33,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042596639] [2024-06-27 18:29:33,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042596639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:33,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:33,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:33,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779120774] [2024-06-27 18:29:33,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:33,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:33,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:33,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:33,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:33,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:33,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 233 transitions, 2298 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:33,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:33,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:33,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:34,788 INFO L124 PetriNetUnfolderBase]: 6634/10311 cut-off events. [2024-06-27 18:29:34,789 INFO L125 PetriNetUnfolderBase]: For 493280/493280 co-relation queries the response was YES. [2024-06-27 18:29:34,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68407 conditions, 10311 events. 6634/10311 cut-off events. For 493280/493280 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 65426 event pairs, 2066 based on Foata normal form. 4/10148 useless extension candidates. Maximal degree in co-relation 68327. Up to 8899 conditions per place. [2024-06-27 18:29:34,916 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 223 selfloop transitions, 54 changer transitions 0/288 dead transitions. [2024-06-27 18:29:34,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 288 transitions, 3276 flow [2024-06-27 18:29:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 18:29:34,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-06-27 18:29:34,917 INFO L175 Difference]: Start difference. First operand has 183 places, 233 transitions, 2298 flow. Second operand 9 states and 231 transitions. [2024-06-27 18:29:34,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 288 transitions, 3276 flow [2024-06-27 18:29:35,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 288 transitions, 3071 flow, removed 90 selfloop flow, removed 4 redundant places. [2024-06-27 18:29:35,676 INFO L231 Difference]: Finished difference. Result has 188 places, 236 transitions, 2291 flow [2024-06-27 18:29:35,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2291, PETRI_PLACES=188, PETRI_TRANSITIONS=236} [2024-06-27 18:29:35,677 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 132 predicate places. [2024-06-27 18:29:35,677 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 236 transitions, 2291 flow [2024-06-27 18:29:35,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:35,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:35,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:35,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:29:35,678 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:35,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:35,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1227018439, now seen corresponding path program 5 times [2024-06-27 18:29:35,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:35,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842772133] [2024-06-27 18:29:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:35,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:36,780 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 18:29:36,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842772133] [2024-06-27 18:29:36,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842772133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:36,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:36,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:36,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340385885] [2024-06-27 18:29:36,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:36,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:36,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:36,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:36,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:36,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:36,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 236 transitions, 2291 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:36,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:36,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:36,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:38,604 INFO L124 PetriNetUnfolderBase]: 6657/10369 cut-off events. [2024-06-27 18:29:38,605 INFO L125 PetriNetUnfolderBase]: For 507650/507650 co-relation queries the response was YES. [2024-06-27 18:29:38,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69261 conditions, 10369 events. 6657/10369 cut-off events. For 507650/507650 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 66079 event pairs, 2079 based on Foata normal form. 2/10196 useless extension candidates. Maximal degree in co-relation 69179. Up to 9239 conditions per place. [2024-06-27 18:29:38,716 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 240 selfloop transitions, 35 changer transitions 0/286 dead transitions. [2024-06-27 18:29:38,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 286 transitions, 3073 flow [2024-06-27 18:29:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-27 18:29:38,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4955555555555556 [2024-06-27 18:29:38,718 INFO L175 Difference]: Start difference. First operand has 188 places, 236 transitions, 2291 flow. Second operand 9 states and 223 transitions. [2024-06-27 18:29:38,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 286 transitions, 3073 flow [2024-06-27 18:29:39,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 286 transitions, 2815 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-27 18:29:39,396 INFO L231 Difference]: Finished difference. Result has 189 places, 239 transitions, 2201 flow [2024-06-27 18:29:39,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2033, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2201, PETRI_PLACES=189, PETRI_TRANSITIONS=239} [2024-06-27 18:29:39,397 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 133 predicate places. [2024-06-27 18:29:39,397 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 239 transitions, 2201 flow [2024-06-27 18:29:39,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:39,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:39,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:39,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:29:39,398 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:39,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:39,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1989981983, now seen corresponding path program 6 times [2024-06-27 18:29:39,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:39,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554318380] [2024-06-27 18:29:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:39,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:40,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:40,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554318380] [2024-06-27 18:29:40,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554318380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:40,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:40,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:40,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081282891] [2024-06-27 18:29:40,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:40,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:40,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:40,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:40,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:40,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:40,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 239 transitions, 2201 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:40,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:40,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:40,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:42,415 INFO L124 PetriNetUnfolderBase]: 6680/10404 cut-off events. [2024-06-27 18:29:42,415 INFO L125 PetriNetUnfolderBase]: For 525566/525566 co-relation queries the response was YES. [2024-06-27 18:29:42,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69746 conditions, 10404 events. 6680/10404 cut-off events. For 525566/525566 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 66354 event pairs, 2079 based on Foata normal form. 2/10230 useless extension candidates. Maximal degree in co-relation 69664. Up to 9271 conditions per place. [2024-06-27 18:29:42,535 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 242 selfloop transitions, 36 changer transitions 0/289 dead transitions. [2024-06-27 18:29:42,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 289 transitions, 2995 flow [2024-06-27 18:29:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 18:29:42,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-06-27 18:29:42,537 INFO L175 Difference]: Start difference. First operand has 189 places, 239 transitions, 2201 flow. Second operand 9 states and 222 transitions. [2024-06-27 18:29:42,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 289 transitions, 2995 flow [2024-06-27 18:29:43,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 289 transitions, 2851 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 18:29:43,269 INFO L231 Difference]: Finished difference. Result has 191 places, 242 transitions, 2233 flow [2024-06-27 18:29:43,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2233, PETRI_PLACES=191, PETRI_TRANSITIONS=242} [2024-06-27 18:29:43,269 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 135 predicate places. [2024-06-27 18:29:43,269 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 242 transitions, 2233 flow [2024-06-27 18:29:43,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:43,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:43,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:43,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:29:43,270 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:43,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:43,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1227018625, now seen corresponding path program 9 times [2024-06-27 18:29:43,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:43,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679409744] [2024-06-27 18:29:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:43,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:44,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679409744] [2024-06-27 18:29:44,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679409744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:44,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:44,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:44,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437008464] [2024-06-27 18:29:44,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:44,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:44,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:44,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:44,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:44,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:44,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 242 transitions, 2233 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:44,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:44,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:44,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:45,806 INFO L124 PetriNetUnfolderBase]: 6726/10472 cut-off events. [2024-06-27 18:29:45,806 INFO L125 PetriNetUnfolderBase]: For 553333/553333 co-relation queries the response was YES. [2024-06-27 18:29:45,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71187 conditions, 10472 events. 6726/10472 cut-off events. For 553333/553333 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 66719 event pairs, 2072 based on Foata normal form. 4/10301 useless extension candidates. Maximal degree in co-relation 71104. Up to 9002 conditions per place. [2024-06-27 18:29:45,914 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 231 selfloop transitions, 56 changer transitions 0/298 dead transitions. [2024-06-27 18:29:45,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 298 transitions, 3223 flow [2024-06-27 18:29:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:29:45,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-06-27 18:29:45,915 INFO L175 Difference]: Start difference. First operand has 191 places, 242 transitions, 2233 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:29:45,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 298 transitions, 3223 flow [2024-06-27 18:29:46,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 298 transitions, 3071 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 18:29:46,446 INFO L231 Difference]: Finished difference. Result has 193 places, 245 transitions, 2259 flow [2024-06-27 18:29:46,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2259, PETRI_PLACES=193, PETRI_TRANSITIONS=245} [2024-06-27 18:29:46,447 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 137 predicate places. [2024-06-27 18:29:46,447 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 245 transitions, 2259 flow [2024-06-27 18:29:46,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:46,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:46,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:46,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:29:46,448 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:46,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:46,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1509875859, now seen corresponding path program 10 times [2024-06-27 18:29:46,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:46,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572707134] [2024-06-27 18:29:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:46,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:47,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:47,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572707134] [2024-06-27 18:29:47,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572707134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:47,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:47,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:47,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602638700] [2024-06-27 18:29:47,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:47,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:47,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:47,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:47,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:47,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:47,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 245 transitions, 2259 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:47,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:47,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:47,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:49,341 INFO L124 PetriNetUnfolderBase]: 6716/10459 cut-off events. [2024-06-27 18:29:49,341 INFO L125 PetriNetUnfolderBase]: For 564138/564138 co-relation queries the response was YES. [2024-06-27 18:29:49,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71252 conditions, 10459 events. 6716/10459 cut-off events. For 564138/564138 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 66629 event pairs, 2042 based on Foata normal form. 4/10286 useless extension candidates. Maximal degree in co-relation 71168. Up to 8994 conditions per place. [2024-06-27 18:29:49,440 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 225 selfloop transitions, 59 changer transitions 0/295 dead transitions. [2024-06-27 18:29:49,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 295 transitions, 2987 flow [2024-06-27 18:29:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 18:29:49,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-06-27 18:29:49,448 INFO L175 Difference]: Start difference. First operand has 193 places, 245 transitions, 2259 flow. Second operand 9 states and 228 transitions. [2024-06-27 18:29:49,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 295 transitions, 2987 flow [2024-06-27 18:29:50,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 295 transitions, 2803 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 18:29:50,113 INFO L231 Difference]: Finished difference. Result has 196 places, 245 transitions, 2201 flow [2024-06-27 18:29:50,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2201, PETRI_PLACES=196, PETRI_TRANSITIONS=245} [2024-06-27 18:29:50,114 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 140 predicate places. [2024-06-27 18:29:50,114 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 245 transitions, 2201 flow [2024-06-27 18:29:50,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:50,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:50,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:50,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:29:50,114 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:50,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1226840685, now seen corresponding path program 5 times [2024-06-27 18:29:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:50,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748472554] [2024-06-27 18:29:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:51,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:51,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748472554] [2024-06-27 18:29:51,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748472554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:51,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:51,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:51,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262299863] [2024-06-27 18:29:51,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:51,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:51,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:51,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:51,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:51,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:29:51,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 245 transitions, 2201 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:51,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:51,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:29:51,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:53,108 INFO L124 PetriNetUnfolderBase]: 6406/10154 cut-off events. [2024-06-27 18:29:53,108 INFO L125 PetriNetUnfolderBase]: For 566461/566549 co-relation queries the response was YES. [2024-06-27 18:29:53,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68268 conditions, 10154 events. 6406/10154 cut-off events. For 566461/566549 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 66365 event pairs, 1992 based on Foata normal form. 4/9962 useless extension candidates. Maximal degree in co-relation 68183. Up to 8861 conditions per place. [2024-06-27 18:29:53,423 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 243 selfloop transitions, 21 changer transitions 0/295 dead transitions. [2024-06-27 18:29:53,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 295 transitions, 2953 flow [2024-06-27 18:29:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 18:29:53,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2024-06-27 18:29:53,429 INFO L175 Difference]: Start difference. First operand has 196 places, 245 transitions, 2201 flow. Second operand 9 states and 227 transitions. [2024-06-27 18:29:53,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 295 transitions, 2953 flow [2024-06-27 18:29:53,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 295 transitions, 2811 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 18:29:53,973 INFO L231 Difference]: Finished difference. Result has 196 places, 247 transitions, 2186 flow [2024-06-27 18:29:53,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2186, PETRI_PLACES=196, PETRI_TRANSITIONS=247} [2024-06-27 18:29:53,974 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 140 predicate places. [2024-06-27 18:29:53,974 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 247 transitions, 2186 flow [2024-06-27 18:29:53,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:53,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:53,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:53,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:29:53,975 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:53,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1509871023, now seen corresponding path program 7 times [2024-06-27 18:29:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:53,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401704720] [2024-06-27 18:29:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:53,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:55,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:55,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401704720] [2024-06-27 18:29:55,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401704720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:55,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:55,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:55,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066329128] [2024-06-27 18:29:55,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:55,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:55,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:55,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:55,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:55,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:55,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 247 transitions, 2186 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:55,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:55,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:55,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:57,133 INFO L124 PetriNetUnfolderBase]: 6746/10492 cut-off events. [2024-06-27 18:29:57,133 INFO L125 PetriNetUnfolderBase]: For 594829/594829 co-relation queries the response was YES. [2024-06-27 18:29:57,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71909 conditions, 10492 events. 6746/10492 cut-off events. For 594829/594829 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 66810 event pairs, 2059 based on Foata normal form. 2/10321 useless extension candidates. Maximal degree in co-relation 71823. Up to 9255 conditions per place. [2024-06-27 18:29:57,252 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 229 selfloop transitions, 71 changer transitions 0/311 dead transitions. [2024-06-27 18:29:57,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 311 transitions, 3386 flow [2024-06-27 18:29:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:29:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:29:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-27 18:29:57,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4690909090909091 [2024-06-27 18:29:57,254 INFO L175 Difference]: Start difference. First operand has 196 places, 247 transitions, 2186 flow. Second operand 11 states and 258 transitions. [2024-06-27 18:29:57,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 311 transitions, 3386 flow [2024-06-27 18:29:58,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 311 transitions, 3277 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 18:29:58,046 INFO L231 Difference]: Finished difference. Result has 203 places, 260 transitions, 2706 flow [2024-06-27 18:29:58,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2706, PETRI_PLACES=203, PETRI_TRANSITIONS=260} [2024-06-27 18:29:58,047 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 147 predicate places. [2024-06-27 18:29:58,047 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 260 transitions, 2706 flow [2024-06-27 18:29:58,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 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 18:29:58,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:58,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:58,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:29:58,048 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:58,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash 792405575, now seen corresponding path program 2 times [2024-06-27 18:29:58,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:58,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872922509] [2024-06-27 18:29:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:58,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:58,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:58,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872922509] [2024-06-27 18:29:58,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872922509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:58,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:58,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:29:58,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158800962] [2024-06-27 18:29:58,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:58,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:29:58,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:58,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:29:58,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:29:58,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:29:58,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 260 transitions, 2706 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:58,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:58,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:29:58,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:00,418 INFO L124 PetriNetUnfolderBase]: 6933/11002 cut-off events. [2024-06-27 18:30:00,419 INFO L125 PetriNetUnfolderBase]: For 688580/688681 co-relation queries the response was YES. [2024-06-27 18:30:00,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75681 conditions, 11002 events. 6933/11002 cut-off events. For 688580/688681 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 72309 event pairs, 2403 based on Foata normal form. 9/10746 useless extension candidates. Maximal degree in co-relation 75591. Up to 9647 conditions per place. [2024-06-27 18:30:00,556 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 216 selfloop transitions, 13 changer transitions 0/277 dead transitions. [2024-06-27 18:30:00,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 277 transitions, 3212 flow [2024-06-27 18:30:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:30:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:30:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 18:30:00,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-27 18:30:00,557 INFO L175 Difference]: Start difference. First operand has 203 places, 260 transitions, 2706 flow. Second operand 6 states and 145 transitions. [2024-06-27 18:30:00,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 277 transitions, 3212 flow [2024-06-27 18:30:01,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 277 transitions, 2901 flow, removed 146 selfloop flow, removed 4 redundant places. [2024-06-27 18:30:01,338 INFO L231 Difference]: Finished difference. Result has 205 places, 260 transitions, 2427 flow [2024-06-27 18:30:01,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2427, PETRI_PLACES=205, PETRI_TRANSITIONS=260} [2024-06-27 18:30:01,339 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 149 predicate places. [2024-06-27 18:30:01,339 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 260 transitions, 2427 flow [2024-06-27 18:30:01,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:01,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:01,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:01,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:30:01,340 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:01,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:01,340 INFO L85 PathProgramCache]: Analyzing trace with hash 798661158, now seen corresponding path program 1 times [2024-06-27 18:30:01,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:01,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136391383] [2024-06-27 18:30:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:01,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:02,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:02,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136391383] [2024-06-27 18:30:02,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136391383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:02,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:02,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:30:02,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36690247] [2024-06-27 18:30:02,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:02,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:30:02,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:02,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:30:02,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:30:02,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:02,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 260 transitions, 2427 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 18:30:02,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:02,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:02,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:04,162 INFO L124 PetriNetUnfolderBase]: 7540/11816 cut-off events. [2024-06-27 18:30:04,163 INFO L125 PetriNetUnfolderBase]: For 697277/697341 co-relation queries the response was YES. [2024-06-27 18:30:04,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78833 conditions, 11816 events. 7540/11816 cut-off events. For 697277/697341 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 76322 event pairs, 2509 based on Foata normal form. 1/11600 useless extension candidates. Maximal degree in co-relation 78741. Up to 10475 conditions per place. [2024-06-27 18:30:04,324 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 232 selfloop transitions, 24 changer transitions 0/290 dead transitions. [2024-06-27 18:30:04,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 290 transitions, 3209 flow [2024-06-27 18:30:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:30:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:30:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 18:30:04,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-06-27 18:30:04,326 INFO L175 Difference]: Start difference. First operand has 205 places, 260 transitions, 2427 flow. Second operand 6 states and 148 transitions. [2024-06-27 18:30:04,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 290 transitions, 3209 flow [2024-06-27 18:30:05,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 290 transitions, 3135 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 18:30:05,240 INFO L231 Difference]: Finished difference. Result has 205 places, 266 transitions, 2506 flow [2024-06-27 18:30:05,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2357, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2506, PETRI_PLACES=205, PETRI_TRANSITIONS=266} [2024-06-27 18:30:05,240 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 149 predicate places. [2024-06-27 18:30:05,240 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 266 transitions, 2506 flow [2024-06-27 18:30:05,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 18:30:05,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:05,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:05,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:30:05,243 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:05,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:05,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1836750408, now seen corresponding path program 2 times [2024-06-27 18:30:05,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:05,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079442572] [2024-06-27 18:30:05,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:05,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:05,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:05,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079442572] [2024-06-27 18:30:05,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079442572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:05,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:05,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:30:05,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243722845] [2024-06-27 18:30:05,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:05,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:30:05,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:30:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:30:05,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:05,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 266 transitions, 2506 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 18:30:05,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:05,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:05,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:07,979 INFO L124 PetriNetUnfolderBase]: 7538/11814 cut-off events. [2024-06-27 18:30:07,979 INFO L125 PetriNetUnfolderBase]: For 718387/718453 co-relation queries the response was YES. [2024-06-27 18:30:08,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79657 conditions, 11814 events. 7538/11814 cut-off events. For 718387/718453 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 76334 event pairs, 2506 based on Foata normal form. 3/11600 useless extension candidates. Maximal degree in co-relation 79566. Up to 10472 conditions per place. [2024-06-27 18:30:08,116 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 228 selfloop transitions, 24 changer transitions 0/286 dead transitions. [2024-06-27 18:30:08,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 286 transitions, 3070 flow [2024-06-27 18:30:08,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:30:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:30:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 18:30:08,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-27 18:30:08,117 INFO L175 Difference]: Start difference. First operand has 205 places, 266 transitions, 2506 flow. Second operand 6 states and 144 transitions. [2024-06-27 18:30:08,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 286 transitions, 3070 flow [2024-06-27 18:30:08,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 286 transitions, 2989 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 18:30:08,859 INFO L231 Difference]: Finished difference. Result has 209 places, 266 transitions, 2480 flow [2024-06-27 18:30:08,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2425, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2480, PETRI_PLACES=209, PETRI_TRANSITIONS=266} [2024-06-27 18:30:08,860 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 153 predicate places. [2024-06-27 18:30:08,860 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 266 transitions, 2480 flow [2024-06-27 18:30:08,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 18:30:08,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:08,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:08,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:30:08,861 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:08,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1281039336, now seen corresponding path program 1 times [2024-06-27 18:30:08,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:08,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371144005] [2024-06-27 18:30:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:08,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:09,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:09,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371144005] [2024-06-27 18:30:09,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371144005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:09,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:09,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:09,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118572747] [2024-06-27 18:30:09,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:09,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:09,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:09,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:09,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-06-27 18:30:09,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 266 transitions, 2480 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:09,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:09,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-06-27 18:30:09,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:12,268 INFO L124 PetriNetUnfolderBase]: 7853/12150 cut-off events. [2024-06-27 18:30:12,268 INFO L125 PetriNetUnfolderBase]: For 744237/744237 co-relation queries the response was YES. [2024-06-27 18:30:12,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82448 conditions, 12150 events. 7853/12150 cut-off events. For 744237/744237 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 77178 event pairs, 2494 based on Foata normal form. 4/11929 useless extension candidates. Maximal degree in co-relation 82355. Up to 10939 conditions per place. [2024-06-27 18:30:12,410 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 281 selfloop transitions, 32 changer transitions 0/323 dead transitions. [2024-06-27 18:30:12,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 323 transitions, 3344 flow [2024-06-27 18:30:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 18:30:12,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47555555555555556 [2024-06-27 18:30:12,411 INFO L175 Difference]: Start difference. First operand has 209 places, 266 transitions, 2480 flow. Second operand 9 states and 214 transitions. [2024-06-27 18:30:12,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 323 transitions, 3344 flow [2024-06-27 18:30:13,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 323 transitions, 3280 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 18:30:13,178 INFO L231 Difference]: Finished difference. Result has 214 places, 273 transitions, 2602 flow [2024-06-27 18:30:13,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2416, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2602, PETRI_PLACES=214, PETRI_TRANSITIONS=273} [2024-06-27 18:30:13,179 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 158 predicate places. [2024-06-27 18:30:13,179 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 273 transitions, 2602 flow [2024-06-27 18:30:13,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:13,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:13,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:13,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:30:13,179 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:13,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:13,182 INFO L85 PathProgramCache]: Analyzing trace with hash 806289638, now seen corresponding path program 1 times [2024-06-27 18:30:13,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:13,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314285913] [2024-06-27 18:30:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:13,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:13,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:13,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314285913] [2024-06-27 18:30:13,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314285913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:13,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:13,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:30:13,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921787399] [2024-06-27 18:30:13,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:13,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:30:13,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:13,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:30:13,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:30:14,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:14,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 273 transitions, 2602 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:14,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:14,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:14,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:15,952 INFO L124 PetriNetUnfolderBase]: 7436/11527 cut-off events. [2024-06-27 18:30:15,952 INFO L125 PetriNetUnfolderBase]: For 761278/761373 co-relation queries the response was YES. [2024-06-27 18:30:16,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79712 conditions, 11527 events. 7436/11527 cut-off events. For 761278/761373 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 73054 event pairs, 2585 based on Foata normal form. 13/11316 useless extension candidates. Maximal degree in co-relation 79617. Up to 10417 conditions per place. [2024-06-27 18:30:16,092 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 236 selfloop transitions, 20 changer transitions 0/302 dead transitions. [2024-06-27 18:30:16,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 302 transitions, 3224 flow [2024-06-27 18:30:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:30:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:30:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 18:30:16,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 18:30:16,093 INFO L175 Difference]: Start difference. First operand has 214 places, 273 transitions, 2602 flow. Second operand 7 states and 165 transitions. [2024-06-27 18:30:16,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 302 transitions, 3224 flow [2024-06-27 18:30:17,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 302 transitions, 3097 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 18:30:17,129 INFO L231 Difference]: Finished difference. Result has 215 places, 276 transitions, 2565 flow [2024-06-27 18:30:17,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2565, PETRI_PLACES=215, PETRI_TRANSITIONS=276} [2024-06-27 18:30:17,130 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 159 predicate places. [2024-06-27 18:30:17,130 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 276 transitions, 2565 flow [2024-06-27 18:30:17,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:17,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:17,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:17,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:30:17,130 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:17,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:17,131 INFO L85 PathProgramCache]: Analyzing trace with hash 183419342, now seen corresponding path program 1 times [2024-06-27 18:30:17,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:17,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491853790] [2024-06-27 18:30:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:17,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:18,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:18,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491853790] [2024-06-27 18:30:18,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491853790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:18,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:18,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:30:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187616958] [2024-06-27 18:30:18,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:18,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:30:18,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:30:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:30:18,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:18,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 276 transitions, 2565 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:18,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:18,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:18,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:20,499 INFO L124 PetriNetUnfolderBase]: 7491/11389 cut-off events. [2024-06-27 18:30:20,499 INFO L125 PetriNetUnfolderBase]: For 775934/775938 co-relation queries the response was YES. [2024-06-27 18:30:20,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82876 conditions, 11389 events. 7491/11389 cut-off events. For 775934/775938 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 70385 event pairs, 1339 based on Foata normal form. 8/11270 useless extension candidates. Maximal degree in co-relation 82780. Up to 10057 conditions per place. [2024-06-27 18:30:20,631 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 296 selfloop transitions, 58 changer transitions 0/366 dead transitions. [2024-06-27 18:30:20,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 366 transitions, 4089 flow [2024-06-27 18:30:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:30:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:30:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 285 transitions. [2024-06-27 18:30:20,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-06-27 18:30:20,632 INFO L175 Difference]: Start difference. First operand has 215 places, 276 transitions, 2565 flow. Second operand 11 states and 285 transitions. [2024-06-27 18:30:20,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 366 transitions, 4089 flow [2024-06-27 18:30:21,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 366 transitions, 4021 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 18:30:21,705 INFO L231 Difference]: Finished difference. Result has 223 places, 286 transitions, 3020 flow [2024-06-27 18:30:21,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3020, PETRI_PLACES=223, PETRI_TRANSITIONS=286} [2024-06-27 18:30:21,705 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 167 predicate places. [2024-06-27 18:30:21,706 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 286 transitions, 3020 flow [2024-06-27 18:30:21,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:21,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:21,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:21,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:30:21,706 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:21,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash -828236045, now seen corresponding path program 1 times [2024-06-27 18:30:21,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:21,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209251219] [2024-06-27 18:30:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:21,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:22,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:22,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209251219] [2024-06-27 18:30:22,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209251219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:22,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:22,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:30:22,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124629932] [2024-06-27 18:30:22,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:22,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:30:22,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:22,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:30:22,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:30:23,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:23,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 286 transitions, 3020 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:23,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:23,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:23,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:25,437 INFO L124 PetriNetUnfolderBase]: 7579/11870 cut-off events. [2024-06-27 18:30:25,437 INFO L125 PetriNetUnfolderBase]: For 824756/824760 co-relation queries the response was YES. [2024-06-27 18:30:25,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86299 conditions, 11870 events. 7579/11870 cut-off events. For 824756/824760 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 76916 event pairs, 1919 based on Foata normal form. 8/11624 useless extension candidates. Maximal degree in co-relation 86200. Up to 10425 conditions per place. [2024-06-27 18:30:25,577 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 333 selfloop transitions, 36 changer transitions 0/381 dead transitions. [2024-06-27 18:30:25,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 381 transitions, 4142 flow [2024-06-27 18:30:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:30:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:30:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 327 transitions. [2024-06-27 18:30:25,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030769230769231 [2024-06-27 18:30:25,579 INFO L175 Difference]: Start difference. First operand has 223 places, 286 transitions, 3020 flow. Second operand 13 states and 327 transitions. [2024-06-27 18:30:25,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 381 transitions, 4142 flow [2024-06-27 18:30:26,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 381 transitions, 3871 flow, removed 121 selfloop flow, removed 5 redundant places. [2024-06-27 18:30:26,549 INFO L231 Difference]: Finished difference. Result has 231 places, 289 transitions, 2932 flow [2024-06-27 18:30:26,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2751, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2932, PETRI_PLACES=231, PETRI_TRANSITIONS=289} [2024-06-27 18:30:26,550 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 175 predicate places. [2024-06-27 18:30:26,550 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 289 transitions, 2932 flow [2024-06-27 18:30:26,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:26,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:26,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:26,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:30:26,550 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:26,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash -828239920, now seen corresponding path program 2 times [2024-06-27 18:30:26,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:26,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911043996] [2024-06-27 18:30:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:26,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:27,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:27,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911043996] [2024-06-27 18:30:27,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911043996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:27,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:27,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:30:27,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270993530] [2024-06-27 18:30:27,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:27,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:30:27,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:27,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:30:27,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:30:27,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:27,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 289 transitions, 2932 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:27,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:27,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:27,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:30,263 INFO L124 PetriNetUnfolderBase]: 7654/11630 cut-off events. [2024-06-27 18:30:30,263 INFO L125 PetriNetUnfolderBase]: For 852203/852207 co-relation queries the response was YES. [2024-06-27 18:30:30,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87262 conditions, 11630 events. 7654/11630 cut-off events. For 852203/852207 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 71978 event pairs, 1694 based on Foata normal form. 8/11511 useless extension candidates. Maximal degree in co-relation 87161. Up to 10459 conditions per place. [2024-06-27 18:30:30,399 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 306 selfloop transitions, 60 changer transitions 0/378 dead transitions. [2024-06-27 18:30:30,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 378 transitions, 4305 flow [2024-06-27 18:30:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:30:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:30:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 285 transitions. [2024-06-27 18:30:30,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-06-27 18:30:30,401 INFO L175 Difference]: Start difference. First operand has 231 places, 289 transitions, 2932 flow. Second operand 11 states and 285 transitions. [2024-06-27 18:30:30,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 378 transitions, 4305 flow [2024-06-27 18:30:31,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 378 transitions, 4145 flow, removed 44 selfloop flow, removed 11 redundant places. [2024-06-27 18:30:31,377 INFO L231 Difference]: Finished difference. Result has 231 places, 299 transitions, 3080 flow [2024-06-27 18:30:31,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3080, PETRI_PLACES=231, PETRI_TRANSITIONS=299} [2024-06-27 18:30:31,377 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 175 predicate places. [2024-06-27 18:30:31,378 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 299 transitions, 3080 flow [2024-06-27 18:30:31,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:31,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:31,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:31,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:30:31,378 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:31,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:31,379 INFO L85 PathProgramCache]: Analyzing trace with hash -828236200, now seen corresponding path program 3 times [2024-06-27 18:30:31,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:31,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459546661] [2024-06-27 18:30:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:31,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:32,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:32,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459546661] [2024-06-27 18:30:32,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459546661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:32,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:32,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:30:32,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740166601] [2024-06-27 18:30:32,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:32,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:30:32,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:32,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:30:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:30:32,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:32,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 299 transitions, 3080 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:32,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:32,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:32,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:35,239 INFO L124 PetriNetUnfolderBase]: 7714/11982 cut-off events. [2024-06-27 18:30:35,239 INFO L125 PetriNetUnfolderBase]: For 880371/880375 co-relation queries the response was YES. [2024-06-27 18:30:35,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88139 conditions, 11982 events. 7714/11982 cut-off events. For 880371/880375 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 77056 event pairs, 1948 based on Foata normal form. 12/11770 useless extension candidates. Maximal degree in co-relation 88037. Up to 10633 conditions per place. [2024-06-27 18:30:35,399 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 337 selfloop transitions, 37 changer transitions 0/386 dead transitions. [2024-06-27 18:30:35,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 386 transitions, 4208 flow [2024-06-27 18:30:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:30:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:30:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 301 transitions. [2024-06-27 18:30:35,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016666666666667 [2024-06-27 18:30:35,401 INFO L175 Difference]: Start difference. First operand has 231 places, 299 transitions, 3080 flow. Second operand 12 states and 301 transitions. [2024-06-27 18:30:35,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 386 transitions, 4208 flow [2024-06-27 18:30:36,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 386 transitions, 3993 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-27 18:30:36,548 INFO L231 Difference]: Finished difference. Result has 237 places, 303 transitions, 3081 flow [2024-06-27 18:30:36,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2913, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3081, PETRI_PLACES=237, PETRI_TRANSITIONS=303} [2024-06-27 18:30:36,549 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 181 predicate places. [2024-06-27 18:30:36,549 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 303 transitions, 3081 flow [2024-06-27 18:30:36,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:36,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:36,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:36,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:30:36,550 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:36,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:36,550 INFO L85 PathProgramCache]: Analyzing trace with hash -741548110, now seen corresponding path program 4 times [2024-06-27 18:30:36,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:36,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973186637] [2024-06-27 18:30:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:36,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:37,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:37,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973186637] [2024-06-27 18:30:37,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973186637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:37,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:37,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:30:37,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339266319] [2024-06-27 18:30:37,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:37,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:30:37,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:37,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:30:37,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:30:37,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:37,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 303 transitions, 3081 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:37,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:37,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:37,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:40,221 INFO L124 PetriNetUnfolderBase]: 7691/11685 cut-off events. [2024-06-27 18:30:40,221 INFO L125 PetriNetUnfolderBase]: For 881029/881033 co-relation queries the response was YES. [2024-06-27 18:30:40,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87305 conditions, 11685 events. 7691/11685 cut-off events. For 881029/881033 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 72399 event pairs, 1690 based on Foata normal form. 8/11566 useless extension candidates. Maximal degree in co-relation 87201. Up to 10574 conditions per place. [2024-06-27 18:30:40,370 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 312 selfloop transitions, 50 changer transitions 0/374 dead transitions. [2024-06-27 18:30:40,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 374 transitions, 4109 flow [2024-06-27 18:30:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:30:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:30:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-27 18:30:40,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508 [2024-06-27 18:30:40,372 INFO L175 Difference]: Start difference. First operand has 237 places, 303 transitions, 3081 flow. Second operand 10 states and 254 transitions. [2024-06-27 18:30:40,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 374 transitions, 4109 flow [2024-06-27 18:30:41,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 374 transitions, 3897 flow, removed 72 selfloop flow, removed 10 redundant places. [2024-06-27 18:30:41,821 INFO L231 Difference]: Finished difference. Result has 239 places, 308 transitions, 3113 flow [2024-06-27 18:30:41,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2915, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3113, PETRI_PLACES=239, PETRI_TRANSITIONS=308} [2024-06-27 18:30:41,822 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 183 predicate places. [2024-06-27 18:30:41,822 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 308 transitions, 3113 flow [2024-06-27 18:30:41,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:41,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:41,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:41,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:30:41,823 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:41,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:41,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1462341111, now seen corresponding path program 2 times [2024-06-27 18:30:41,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:41,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134788882] [2024-06-27 18:30:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:41,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:42,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:42,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134788882] [2024-06-27 18:30:42,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134788882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:42,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:42,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:30:42,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281668715] [2024-06-27 18:30:42,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:42,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:30:42,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:42,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:30:42,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:30:43,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:43,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 308 transitions, 3113 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:43,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:43,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:43,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:45,477 INFO L124 PetriNetUnfolderBase]: 7772/12071 cut-off events. [2024-06-27 18:30:45,478 INFO L125 PetriNetUnfolderBase]: For 907399/907405 co-relation queries the response was YES. [2024-06-27 18:30:45,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88576 conditions, 12071 events. 7772/12071 cut-off events. For 907399/907405 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 77701 event pairs, 1819 based on Foata normal form. 8/11854 useless extension candidates. Maximal degree in co-relation 88469. Up to 10033 conditions per place. [2024-06-27 18:30:45,621 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 281 selfloop transitions, 94 changer transitions 0/387 dead transitions. [2024-06-27 18:30:45,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 387 transitions, 4210 flow [2024-06-27 18:30:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:30:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:30:45,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 288 transitions. [2024-06-27 18:30:45,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236363636363637 [2024-06-27 18:30:45,623 INFO L175 Difference]: Start difference. First operand has 239 places, 308 transitions, 3113 flow. Second operand 11 states and 288 transitions. [2024-06-27 18:30:45,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 387 transitions, 4210 flow [2024-06-27 18:30:46,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 387 transitions, 4009 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 18:30:46,587 INFO L231 Difference]: Finished difference. Result has 242 places, 314 transitions, 3240 flow [2024-06-27 18:30:46,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3240, PETRI_PLACES=242, PETRI_TRANSITIONS=314} [2024-06-27 18:30:46,588 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 186 predicate places. [2024-06-27 18:30:46,588 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 314 transitions, 3240 flow [2024-06-27 18:30:46,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:46,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:46,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:46,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:30:46,588 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:46,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:46,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1462341266, now seen corresponding path program 5 times [2024-06-27 18:30:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:46,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443995079] [2024-06-27 18:30:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:47,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:47,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443995079] [2024-06-27 18:30:47,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443995079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:47,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:47,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:30:47,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431119092] [2024-06-27 18:30:47,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:47,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:30:47,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:47,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:30:47,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:30:47,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:47,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 314 transitions, 3240 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:47,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:47,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:47,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:50,245 INFO L124 PetriNetUnfolderBase]: 7818/12136 cut-off events. [2024-06-27 18:30:50,246 INFO L125 PetriNetUnfolderBase]: For 946692/946698 co-relation queries the response was YES. [2024-06-27 18:30:50,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90774 conditions, 12136 events. 7818/12136 cut-off events. For 946692/946698 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 78165 event pairs, 1935 based on Foata normal form. 8/11914 useless extension candidates. Maximal degree in co-relation 90666. Up to 10672 conditions per place. [2024-06-27 18:30:50,382 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 308 selfloop transitions, 57 changer transitions 0/377 dead transitions. [2024-06-27 18:30:50,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 377 transitions, 4244 flow [2024-06-27 18:30:50,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:30:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:30:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 18:30:50,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-27 18:30:50,384 INFO L175 Difference]: Start difference. First operand has 242 places, 314 transitions, 3240 flow. Second operand 10 states and 255 transitions. [2024-06-27 18:30:50,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 377 transitions, 4244 flow [2024-06-27 18:30:51,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 377 transitions, 3971 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-27 18:30:51,472 INFO L231 Difference]: Finished difference. Result has 244 places, 316 transitions, 3178 flow [2024-06-27 18:30:51,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3178, PETRI_PLACES=244, PETRI_TRANSITIONS=316} [2024-06-27 18:30:51,473 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 188 predicate places. [2024-06-27 18:30:51,473 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 316 transitions, 3178 flow [2024-06-27 18:30:51,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:51,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:51,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:51,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:30:51,474 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:51,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:51,474 INFO L85 PathProgramCache]: Analyzing trace with hash -448952049, now seen corresponding path program 3 times [2024-06-27 18:30:51,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:51,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166425060] [2024-06-27 18:30:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:51,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:52,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:52,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166425060] [2024-06-27 18:30:52,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166425060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:52,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:52,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:30:52,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644580470] [2024-06-27 18:30:52,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:52,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:30:52,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:52,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:30:52,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:30:52,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:52,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 316 transitions, 3178 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:52,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:52,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:52,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:55,063 INFO L124 PetriNetUnfolderBase]: 7927/11926 cut-off events. [2024-06-27 18:30:55,063 INFO L125 PetriNetUnfolderBase]: For 1003679/1003685 co-relation queries the response was YES. [2024-06-27 18:30:55,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93096 conditions, 11926 events. 7927/11926 cut-off events. For 1003679/1003685 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 73210 event pairs, 1410 based on Foata normal form. 8/11859 useless extension candidates. Maximal degree in co-relation 92987. Up to 9912 conditions per place. [2024-06-27 18:30:55,223 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 263 selfloop transitions, 140 changer transitions 0/415 dead transitions. [2024-06-27 18:30:55,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 415 transitions, 5552 flow [2024-06-27 18:30:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:30:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:30:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-06-27 18:30:55,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544 [2024-06-27 18:30:55,224 INFO L175 Difference]: Start difference. First operand has 244 places, 316 transitions, 3178 flow. Second operand 10 states and 272 transitions. [2024-06-27 18:30:55,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 415 transitions, 5552 flow [2024-06-27 18:30:56,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 415 transitions, 5359 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 18:30:56,418 INFO L231 Difference]: Finished difference. Result has 249 places, 336 transitions, 4027 flow [2024-06-27 18:30:56,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4027, PETRI_PLACES=249, PETRI_TRANSITIONS=336} [2024-06-27 18:30:56,418 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 193 predicate places. [2024-06-27 18:30:56,418 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 336 transitions, 4027 flow [2024-06-27 18:30:56,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:56,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:56,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:56,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:30:56,419 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:56,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:56,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1462485416, now seen corresponding path program 6 times [2024-06-27 18:30:56,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:56,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323026159] [2024-06-27 18:30:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:56,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:57,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:57,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323026159] [2024-06-27 18:30:57,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323026159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:57,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:57,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:30:57,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171943436] [2024-06-27 18:30:57,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:57,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:30:57,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:57,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:30:57,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:30:57,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:57,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 336 transitions, 4027 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:57,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:57,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:57,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:00,324 INFO L124 PetriNetUnfolderBase]: 8003/12398 cut-off events. [2024-06-27 18:31:00,324 INFO L125 PetriNetUnfolderBase]: For 1055442/1055448 co-relation queries the response was YES. [2024-06-27 18:31:00,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97752 conditions, 12398 events. 8003/12398 cut-off events. For 1055442/1055448 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 80025 event pairs, 1914 based on Foata normal form. 8/12181 useless extension candidates. Maximal degree in co-relation 97639. Up to 10855 conditions per place. [2024-06-27 18:31:00,486 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 327 selfloop transitions, 68 changer transitions 0/407 dead transitions. [2024-06-27 18:31:00,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 407 transitions, 5125 flow [2024-06-27 18:31:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:31:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:31:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 280 transitions. [2024-06-27 18:31:00,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-06-27 18:31:00,487 INFO L175 Difference]: Start difference. First operand has 249 places, 336 transitions, 4027 flow. Second operand 11 states and 280 transitions. [2024-06-27 18:31:00,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 407 transitions, 5125 flow [2024-06-27 18:31:02,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 407 transitions, 4771 flow, removed 163 selfloop flow, removed 3 redundant places. [2024-06-27 18:31:02,647 INFO L231 Difference]: Finished difference. Result has 257 places, 338 transitions, 3917 flow [2024-06-27 18:31:02,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3675, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3917, PETRI_PLACES=257, PETRI_TRANSITIONS=338} [2024-06-27 18:31:02,647 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 201 predicate places. [2024-06-27 18:31:02,648 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 338 transitions, 3917 flow [2024-06-27 18:31:02,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:02,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:02,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:02,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:31:02,648 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:02,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash -448955924, now seen corresponding path program 7 times [2024-06-27 18:31:02,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:02,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903515633] [2024-06-27 18:31:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:02,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:04,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:04,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903515633] [2024-06-27 18:31:04,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903515633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:04,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:04,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:31:04,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912576706] [2024-06-27 18:31:04,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:04,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:31:04,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:04,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:31:04,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:31:04,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:04,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 338 transitions, 3917 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:04,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:04,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:04,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:07,150 INFO L124 PetriNetUnfolderBase]: 8085/12522 cut-off events. [2024-06-27 18:31:07,151 INFO L125 PetriNetUnfolderBase]: For 1079985/1079991 co-relation queries the response was YES. [2024-06-27 18:31:07,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98253 conditions, 12522 events. 8085/12522 cut-off events. For 1079985/1079991 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 80831 event pairs, 1895 based on Foata normal form. 8/12307 useless extension candidates. Maximal degree in co-relation 98139. Up to 10860 conditions per place. [2024-06-27 18:31:07,303 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 322 selfloop transitions, 72 changer transitions 0/406 dead transitions. [2024-06-27 18:31:07,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 406 transitions, 5345 flow [2024-06-27 18:31:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:31:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:31:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-27 18:31:07,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518 [2024-06-27 18:31:07,305 INFO L175 Difference]: Start difference. First operand has 257 places, 338 transitions, 3917 flow. Second operand 10 states and 259 transitions. [2024-06-27 18:31:07,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 406 transitions, 5345 flow [2024-06-27 18:31:08,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 406 transitions, 5131 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-27 18:31:08,826 INFO L231 Difference]: Finished difference. Result has 258 places, 342 transitions, 4050 flow [2024-06-27 18:31:08,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3703, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4050, PETRI_PLACES=258, PETRI_TRANSITIONS=342} [2024-06-27 18:31:08,826 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 202 predicate places. [2024-06-27 18:31:08,826 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 342 transitions, 4050 flow [2024-06-27 18:31:08,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:08,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:08,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:08,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:31:08,827 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:08,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1456771341, now seen corresponding path program 4 times [2024-06-27 18:31:08,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:08,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167049438] [2024-06-27 18:31:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:08,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:09,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:09,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167049438] [2024-06-27 18:31:09,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167049438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:09,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:09,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:31:09,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928171606] [2024-06-27 18:31:09,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:09,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:31:09,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:09,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:31:09,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:31:10,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:10,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 342 transitions, 4050 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:10,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:10,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:10,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:12,834 INFO L124 PetriNetUnfolderBase]: 8127/12618 cut-off events. [2024-06-27 18:31:12,834 INFO L125 PetriNetUnfolderBase]: For 1112586/1112592 co-relation queries the response was YES. [2024-06-27 18:31:12,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99443 conditions, 12618 events. 8127/12618 cut-off events. For 1112586/1112592 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 81919 event pairs, 1774 based on Foata normal form. 8/12400 useless extension candidates. Maximal degree in co-relation 99328. Up to 10574 conditions per place. [2024-06-27 18:31:13,004 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 303 selfloop transitions, 94 changer transitions 0/409 dead transitions. [2024-06-27 18:31:13,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 409 transitions, 5147 flow [2024-06-27 18:31:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:31:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:31:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-27 18:31:13,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522 [2024-06-27 18:31:13,006 INFO L175 Difference]: Start difference. First operand has 258 places, 342 transitions, 4050 flow. Second operand 10 states and 261 transitions. [2024-06-27 18:31:13,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 409 transitions, 5147 flow [2024-06-27 18:31:15,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 409 transitions, 4950 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 18:31:15,248 INFO L231 Difference]: Finished difference. Result has 262 places, 345 transitions, 4156 flow [2024-06-27 18:31:15,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3853, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4156, PETRI_PLACES=262, PETRI_TRANSITIONS=345} [2024-06-27 18:31:15,249 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 206 predicate places. [2024-06-27 18:31:15,249 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 345 transitions, 4156 flow [2024-06-27 18:31:15,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:15,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:15,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:15,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:31:15,250 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:15,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:15,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1456973151, now seen corresponding path program 5 times [2024-06-27 18:31:15,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:15,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163361638] [2024-06-27 18:31:15,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:15,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:16,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:16,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163361638] [2024-06-27 18:31:16,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163361638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:16,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:16,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:31:16,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307120681] [2024-06-27 18:31:16,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:16,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:31:16,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:16,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:31:16,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:31:16,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:16,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 345 transitions, 4156 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:16,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:16,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:16,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:19,472 INFO L124 PetriNetUnfolderBase]: 8148/12647 cut-off events. [2024-06-27 18:31:19,472 INFO L125 PetriNetUnfolderBase]: For 1121744/1121750 co-relation queries the response was YES. [2024-06-27 18:31:19,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100042 conditions, 12647 events. 8148/12647 cut-off events. For 1121744/1121750 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 82036 event pairs, 1795 based on Foata normal form. 8/12425 useless extension candidates. Maximal degree in co-relation 99925. Up to 10599 conditions per place. [2024-06-27 18:31:19,638 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 309 selfloop transitions, 92 changer transitions 0/413 dead transitions. [2024-06-27 18:31:19,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 413 transitions, 5271 flow [2024-06-27 18:31:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:31:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:31:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-06-27 18:31:19,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526 [2024-06-27 18:31:19,639 INFO L175 Difference]: Start difference. First operand has 262 places, 345 transitions, 4156 flow. Second operand 10 states and 263 transitions. [2024-06-27 18:31:19,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 413 transitions, 5271 flow [2024-06-27 18:31:21,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 413 transitions, 5001 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-27 18:31:21,809 INFO L231 Difference]: Finished difference. Result has 264 places, 348 transitions, 4191 flow [2024-06-27 18:31:21,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4191, PETRI_PLACES=264, PETRI_TRANSITIONS=348} [2024-06-27 18:31:21,811 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 208 predicate places. [2024-06-27 18:31:21,811 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 348 transitions, 4191 flow [2024-06-27 18:31:21,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:21,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:21,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:21,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 18:31:21,815 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:21,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1456978731, now seen corresponding path program 6 times [2024-06-27 18:31:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:21,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232317986] [2024-06-27 18:31:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:21,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:23,043 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 18:31:23,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:23,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232317986] [2024-06-27 18:31:23,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232317986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:23,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:23,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:31:23,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137901251] [2024-06-27 18:31:23,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:23,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:31:23,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:23,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:31:23,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:31:23,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:23,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 348 transitions, 4191 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:23,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:23,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:23,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:26,064 INFO L124 PetriNetUnfolderBase]: 8173/12674 cut-off events. [2024-06-27 18:31:26,064 INFO L125 PetriNetUnfolderBase]: For 1148501/1148507 co-relation queries the response was YES. [2024-06-27 18:31:26,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100347 conditions, 12674 events. 8173/12674 cut-off events. For 1148501/1148507 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 82154 event pairs, 1777 based on Foata normal form. 8/12459 useless extension candidates. Maximal degree in co-relation 100229. Up to 10544 conditions per place. [2024-06-27 18:31:26,234 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 312 selfloop transitions, 101 changer transitions 0/425 dead transitions. [2024-06-27 18:31:26,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 425 transitions, 5366 flow [2024-06-27 18:31:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:31:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:31:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 289 transitions. [2024-06-27 18:31:26,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254545454545455 [2024-06-27 18:31:26,236 INFO L175 Difference]: Start difference. First operand has 264 places, 348 transitions, 4191 flow. Second operand 11 states and 289 transitions. [2024-06-27 18:31:26,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 425 transitions, 5366 flow [2024-06-27 18:31:28,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 425 transitions, 4994 flow, removed 96 selfloop flow, removed 8 redundant places. [2024-06-27 18:31:28,269 INFO L231 Difference]: Finished difference. Result has 267 places, 351 transitions, 4152 flow [2024-06-27 18:31:28,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3863, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4152, PETRI_PLACES=267, PETRI_TRANSITIONS=351} [2024-06-27 18:31:28,278 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 211 predicate places. [2024-06-27 18:31:28,278 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 351 transitions, 4152 flow [2024-06-27 18:31:28,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:28,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:28,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:28,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 18:31:28,279 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:28,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1456978886, now seen corresponding path program 8 times [2024-06-27 18:31:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:28,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587306621] [2024-06-27 18:31:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:28,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:29,942 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 18:31:29,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:29,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587306621] [2024-06-27 18:31:29,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587306621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:29,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:29,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:31:29,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631494058] [2024-06-27 18:31:29,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:29,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:31:29,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:29,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:31:29,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:31:30,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:30,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 351 transitions, 4152 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:30,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:30,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:30,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:32,975 INFO L124 PetriNetUnfolderBase]: 8169/12691 cut-off events. [2024-06-27 18:31:32,975 INFO L125 PetriNetUnfolderBase]: For 1152061/1152067 co-relation queries the response was YES. [2024-06-27 18:31:33,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99541 conditions, 12691 events. 8169/12691 cut-off events. For 1152061/1152067 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 82505 event pairs, 1929 based on Foata normal form. 8/12461 useless extension candidates. Maximal degree in co-relation 99422. Up to 11178 conditions per place. [2024-06-27 18:31:33,147 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 342 selfloop transitions, 58 changer transitions 0/412 dead transitions. [2024-06-27 18:31:33,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 412 transitions, 5140 flow [2024-06-27 18:31:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:31:33,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:31:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-27 18:31:33,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508 [2024-06-27 18:31:33,149 INFO L175 Difference]: Start difference. First operand has 267 places, 351 transitions, 4152 flow. Second operand 10 states and 254 transitions. [2024-06-27 18:31:33,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 412 transitions, 5140 flow [2024-06-27 18:31:35,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 412 transitions, 4838 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-27 18:31:35,315 INFO L231 Difference]: Finished difference. Result has 268 places, 351 transitions, 3973 flow [2024-06-27 18:31:35,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3850, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3973, PETRI_PLACES=268, PETRI_TRANSITIONS=351} [2024-06-27 18:31:35,316 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 212 predicate places. [2024-06-27 18:31:35,316 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 351 transitions, 3973 flow [2024-06-27 18:31:35,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:35,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:35,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:35,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 18:31:35,317 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:35,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:35,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1396473794, now seen corresponding path program 1 times [2024-06-27 18:31:35,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:35,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419597919] [2024-06-27 18:31:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:35,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:36,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:36,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419597919] [2024-06-27 18:31:36,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419597919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:36,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:36,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:31:36,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544123792] [2024-06-27 18:31:36,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:36,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:31:36,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:36,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:31:36,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:31:36,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:36,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 351 transitions, 3973 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:36,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:36,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:36,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:39,057 INFO L124 PetriNetUnfolderBase]: 8263/12856 cut-off events. [2024-06-27 18:31:39,057 INFO L125 PetriNetUnfolderBase]: For 1142596/1142662 co-relation queries the response was YES. [2024-06-27 18:31:39,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96488 conditions, 12856 events. 8263/12856 cut-off events. For 1142596/1142662 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 83555 event pairs, 2305 based on Foata normal form. 24/12595 useless extension candidates. Maximal degree in co-relation 96368. Up to 11424 conditions per place. [2024-06-27 18:31:39,206 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 300 selfloop transitions, 28 changer transitions 0/392 dead transitions. [2024-06-27 18:31:39,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 392 transitions, 4977 flow [2024-06-27 18:31:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:31:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:31:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:31:39,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942857142857143 [2024-06-27 18:31:39,207 INFO L175 Difference]: Start difference. First operand has 268 places, 351 transitions, 3973 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:31:39,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 392 transitions, 4977 flow [2024-06-27 18:31:40,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 392 transitions, 4842 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 18:31:40,468 INFO L231 Difference]: Finished difference. Result has 267 places, 361 transitions, 4037 flow [2024-06-27 18:31:40,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3838, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4037, PETRI_PLACES=267, PETRI_TRANSITIONS=361} [2024-06-27 18:31:40,468 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 211 predicate places. [2024-06-27 18:31:40,468 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 361 transitions, 4037 flow [2024-06-27 18:31:40,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:40,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:40,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:40,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 18:31:40,469 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:40,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:40,469 INFO L85 PathProgramCache]: Analyzing trace with hash -622489673, now seen corresponding path program 7 times [2024-06-27 18:31:40,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:40,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227382392] [2024-06-27 18:31:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:40,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:41,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:41,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227382392] [2024-06-27 18:31:41,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227382392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:41,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:41,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:31:41,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775049872] [2024-06-27 18:31:41,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:41,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:31:41,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:41,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:31:41,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:31:41,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:41,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 361 transitions, 4037 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:41,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:41,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:41,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:44,654 INFO L124 PetriNetUnfolderBase]: 8319/12970 cut-off events. [2024-06-27 18:31:44,654 INFO L125 PetriNetUnfolderBase]: For 1180971/1180991 co-relation queries the response was YES. [2024-06-27 18:31:44,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101477 conditions, 12970 events. 8319/12970 cut-off events. For 1180971/1180991 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 85111 event pairs, 2212 based on Foata normal form. 4/12741 useless extension candidates. Maximal degree in co-relation 101355. Up to 11154 conditions per place. [2024-06-27 18:31:44,818 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 344 selfloop transitions, 64 changer transitions 0/423 dead transitions. [2024-06-27 18:31:44,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 423 transitions, 5159 flow [2024-06-27 18:31:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:31:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:31:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-27 18:31:44,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506 [2024-06-27 18:31:44,819 INFO L175 Difference]: Start difference. First operand has 267 places, 361 transitions, 4037 flow. Second operand 10 states and 253 transitions. [2024-06-27 18:31:44,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 423 transitions, 5159 flow [2024-06-27 18:31:46,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 423 transitions, 5114 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 18:31:46,858 INFO L231 Difference]: Finished difference. Result has 275 places, 364 transitions, 4248 flow [2024-06-27 18:31:46,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4248, PETRI_PLACES=275, PETRI_TRANSITIONS=364} [2024-06-27 18:31:46,858 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 219 predicate places. [2024-06-27 18:31:46,858 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 364 transitions, 4248 flow [2024-06-27 18:31:46,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:46,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:46,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:46,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 18:31:46,859 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:46,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1503701263, now seen corresponding path program 8 times [2024-06-27 18:31:46,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:46,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111830064] [2024-06-27 18:31:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:46,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:47,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:47,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111830064] [2024-06-27 18:31:47,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111830064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:47,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:47,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:31:47,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574017693] [2024-06-27 18:31:47,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:47,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:31:47,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:47,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:31:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:31:48,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:48,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 364 transitions, 4248 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:48,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:48,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:48,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:50,996 INFO L124 PetriNetUnfolderBase]: 8400/13066 cut-off events. [2024-06-27 18:31:50,997 INFO L125 PetriNetUnfolderBase]: For 1230971/1230983 co-relation queries the response was YES. [2024-06-27 18:31:51,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104677 conditions, 13066 events. 8400/13066 cut-off events. For 1230971/1230983 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 85524 event pairs, 2162 based on Foata normal form. 4/12845 useless extension candidates. Maximal degree in co-relation 104552. Up to 11081 conditions per place. [2024-06-27 18:31:51,203 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 335 selfloop transitions, 102 changer transitions 0/452 dead transitions. [2024-06-27 18:31:51,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 452 transitions, 6503 flow [2024-06-27 18:31:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:31:51,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:31:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-06-27 18:31:51,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526 [2024-06-27 18:31:51,204 INFO L175 Difference]: Start difference. First operand has 275 places, 364 transitions, 4248 flow. Second operand 10 states and 263 transitions. [2024-06-27 18:31:51,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 452 transitions, 6503 flow [2024-06-27 18:31:53,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 452 transitions, 6271 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-27 18:31:53,319 INFO L231 Difference]: Finished difference. Result has 280 places, 382 transitions, 4896 flow [2024-06-27 18:31:53,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4016, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4896, PETRI_PLACES=280, PETRI_TRANSITIONS=382} [2024-06-27 18:31:53,320 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 224 predicate places. [2024-06-27 18:31:53,320 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 382 transitions, 4896 flow [2024-06-27 18:31:53,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:53,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:53,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:53,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 18:31:53,321 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:53,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:53,321 INFO L85 PathProgramCache]: Analyzing trace with hash -438641236, now seen corresponding path program 9 times [2024-06-27 18:31:53,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:53,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109334175] [2024-06-27 18:31:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:53,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat