./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix006.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix006.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix006.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix006.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:13:51,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:13:51,873 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:13:51,878 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:13:51,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:13:51,900 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:13:51,900 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:13:51,901 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:13:51,901 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:13:51,904 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:13:51,904 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:13:51,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:13:51,905 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:13:51,906 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:13:51,906 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:13:51,906 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:13:51,907 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:13:51,907 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:13:51,907 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:13:51,907 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:13:51,908 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:13:51,909 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:13:51,909 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:13:51,909 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:13:51,909 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:13:51,910 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:13:51,910 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:13:51,910 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:13:51,911 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:13:51,911 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:13:51,912 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:13:51,912 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:13:51,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:13:51,912 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:13:51,912 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:13:51,913 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:13:51,913 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:13:51,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:13:51,913 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:13:51,913 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:13:51,913 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:13:51,914 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:13:51,914 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:13:51,914 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:13:52,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:13:52,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:13:52,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:13:52,107 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:13:52,107 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:13:52,108 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix006.opt.yml/witness.yml [2024-06-27 18:13:52,279 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:13:52,280 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:13:52,280 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix006.opt.i [2024-06-27 18:13:53,232 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:13:53,453 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:13:53,453 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006.opt.i [2024-06-27 18:13:53,463 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe772858/b9ec072bac824900b4bb72ba2f443c03/FLAG6397623ae [2024-06-27 18:13:53,472 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe772858/b9ec072bac824900b4bb72ba2f443c03 [2024-06-27 18:13:53,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:13:53,473 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:13:53,474 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:13:53,474 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:13:53,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:13:53,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:13:52" (1/2) ... [2024-06-27 18:13:53,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c658695 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:13:53, skipping insertion in model container [2024-06-27 18:13:53,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:13:52" (1/2) ... [2024-06-27 18:13:53,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@799a6b40 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:13:53, skipping insertion in model container [2024-06-27 18:13:53,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:13:53" (2/2) ... [2024-06-27 18:13:53,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c658695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:53, skipping insertion in model container [2024-06-27 18:13:53,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:13:53" (2/2) ... [2024-06-27 18:13:53,480 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:13:53,547 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:13:53,548 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 18:13:53,548 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 18:13:53,548 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 18:13:53,548 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:13:53,549 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-27 18:13:53,580 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:13:53,719 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/mix006.opt.i[944,957] [2024-06-27 18:13:53,878 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:13:53,885 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:13:53,915 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/mix006.opt.i[944,957] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:13:54,003 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:13:54,034 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:13:54,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54 WrapperNode [2024-06-27 18:13:54,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:13:54,036 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:13:54,036 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:13:54,037 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:13:54,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,069 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,097 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 145 [2024-06-27 18:13:54,098 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:13:54,098 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:13:54,098 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:13:54,098 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:13:54,107 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,117 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,140 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 18:13:54,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,159 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,160 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,170 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,172 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:13:54,173 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:13:54,173 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:13:54,173 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:13:54,174 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (1/1) ... [2024-06-27 18:13:54,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:13:54,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:13:54,203 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 18:13:54,205 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 18:13:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:13:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:13:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:13:54,235 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:13:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:13:54,236 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:13:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:13:54,236 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:13:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:13:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:13:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:13:54,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:13:54,237 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 18:13:54,334 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:13:54,335 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:13:54,615 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:13:54,615 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:13:54,774 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:13:54,775 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:13:54,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:13:54 BoogieIcfgContainer [2024-06-27 18:13:54,775 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:13:54,777 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:13:54,777 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:13:54,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:13:54,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:13:52" (1/4) ... [2024-06-27 18:13:54,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50eea8ee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:13:54, skipping insertion in model container [2024-06-27 18:13:54,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:13:53" (2/4) ... [2024-06-27 18:13:54,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50eea8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:13:54, skipping insertion in model container [2024-06-27 18:13:54,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:13:54" (3/4) ... [2024-06-27 18:13:54,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50eea8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:13:54, skipping insertion in model container [2024-06-27 18:13:54,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:13:54" (4/4) ... [2024-06-27 18:13:54,784 INFO L112 eAbstractionObserver]: Analyzing ICFG mix006.opt.i [2024-06-27 18:13:54,796 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:13:54,796 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 18:13:54,796 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:13:54,841 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:13:54,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 18:13:54,893 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2024-06-27 18:13:54,893 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:13:54,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 45 events. 1/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-06-27 18:13:54,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 18:13:54,901 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 45 transitions, 99 flow [2024-06-27 18:13:54,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:13:54,917 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;@54ffe3ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:13:54,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 18:13:54,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:13:54,921 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 18:13:54,921 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:13:54,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:54,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:13:54,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:54,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash 381776835, now seen corresponding path program 1 times [2024-06-27 18:13:54,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:54,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768310107] [2024-06-27 18:13:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:54,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:55,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:55,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768310107] [2024-06-27 18:13:55,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768310107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:55,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:55,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:13:55,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543764205] [2024-06-27 18:13:55,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:55,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:13:55,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:55,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:13:55,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:13:55,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-06-27 18:13:55,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 99 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 18:13:55,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:55,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-06-27 18:13:55,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:56,353 INFO L124 PetriNetUnfolderBase]: 3005/5067 cut-off events. [2024-06-27 18:13:56,353 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 18:13:56,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9482 conditions, 5067 events. 3005/5067 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 33667 event pairs, 2435 based on Foata normal form. 151/4804 useless extension candidates. Maximal degree in co-relation 9470. Up to 4336 conditions per place. [2024-06-27 18:13:56,386 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 40 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 18:13:56,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 59 transitions, 223 flow [2024-06-27 18:13:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:13:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:13:56,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-27 18:13:56,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7013888888888888 [2024-06-27 18:13:56,397 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 99 flow. Second operand 3 states and 101 transitions. [2024-06-27 18:13:56,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 59 transitions, 223 flow [2024-06-27 18:13:56,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 218 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:13:56,405 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 131 flow [2024-06-27 18:13:56,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-27 18:13:56,409 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2024-06-27 18:13:56,410 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 131 flow [2024-06-27 18:13:56,410 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 18:13:56,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:56,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:56,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:13:56,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:56,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1815338914, now seen corresponding path program 1 times [2024-06-27 18:13:56,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:56,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18900025] [2024-06-27 18:13:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:56,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:56,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:56,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18900025] [2024-06-27 18:13:56,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18900025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:56,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:56,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:13:56,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462285592] [2024-06-27 18:13:56,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:56,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:13:56,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:13:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:13:56,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-06-27 18:13:56,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:56,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:56,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-06-27 18:13:56,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:57,379 INFO L124 PetriNetUnfolderBase]: 3428/5518 cut-off events. [2024-06-27 18:13:57,379 INFO L125 PetriNetUnfolderBase]: For 757/757 co-relation queries the response was YES. [2024-06-27 18:13:57,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11728 conditions, 5518 events. 3428/5518 cut-off events. For 757/757 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 34544 event pairs, 1983 based on Foata normal form. 3/5177 useless extension candidates. Maximal degree in co-relation 11716. Up to 4908 conditions per place. [2024-06-27 18:13:57,439 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 52 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-06-27 18:13:57,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 319 flow [2024-06-27 18:13:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:13:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:13:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-27 18:13:57,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 18:13:57,441 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 131 flow. Second operand 4 states and 128 transitions. [2024-06-27 18:13:57,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 319 flow [2024-06-27 18:13:57,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:13:57,443 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 177 flow [2024-06-27 18:13:57,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-27 18:13:57,444 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-06-27 18:13:57,444 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 177 flow [2024-06-27 18:13:57,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:57,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:57,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:57,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:13:57,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:57,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:57,446 INFO L85 PathProgramCache]: Analyzing trace with hash 440932192, now seen corresponding path program 1 times [2024-06-27 18:13:57,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:57,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749531304] [2024-06-27 18:13:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:57,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:57,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:57,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749531304] [2024-06-27 18:13:57,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749531304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:57,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:57,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:13:57,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063049580] [2024-06-27 18:13:57,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:57,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:13:57,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:13:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:13:57,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-06-27 18:13:57,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:57,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:57,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-06-27 18:13:57,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:58,603 INFO L124 PetriNetUnfolderBase]: 4199/6956 cut-off events. [2024-06-27 18:13:58,603 INFO L125 PetriNetUnfolderBase]: For 2625/2625 co-relation queries the response was YES. [2024-06-27 18:13:58,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15802 conditions, 6956 events. 4199/6956 cut-off events. For 2625/2625 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 46593 event pairs, 2368 based on Foata normal form. 5/6498 useless extension candidates. Maximal degree in co-relation 15788. Up to 5877 conditions per place. [2024-06-27 18:13:58,637 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 70 selfloop transitions, 21 changer transitions 0/103 dead transitions. [2024-06-27 18:13:58,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 103 transitions, 521 flow [2024-06-27 18:13:58,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:13:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:13:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-27 18:13:58,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6791666666666667 [2024-06-27 18:13:58,639 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 177 flow. Second operand 5 states and 163 transitions. [2024-06-27 18:13:58,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 103 transitions, 521 flow [2024-06-27 18:13:58,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 103 transitions, 502 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 18:13:58,643 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 306 flow [2024-06-27 18:13:58,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2024-06-27 18:13:58,644 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2024-06-27 18:13:58,644 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 306 flow [2024-06-27 18:13:58,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:58,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:58,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:58,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:13:58,645 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:58,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash 251846883, now seen corresponding path program 1 times [2024-06-27 18:13:58,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:58,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812319035] [2024-06-27 18:13:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:58,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:59,273 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 18:13:59,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:59,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812319035] [2024-06-27 18:13:59,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812319035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:59,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:59,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:13:59,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585440111] [2024-06-27 18:13:59,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:59,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:13:59,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:59,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:13:59,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:13:59,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-06-27 18:13:59,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 306 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:59,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:59,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-06-27 18:13:59,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:00,061 INFO L124 PetriNetUnfolderBase]: 4243/6996 cut-off events. [2024-06-27 18:14:00,062 INFO L125 PetriNetUnfolderBase]: For 6432/6435 co-relation queries the response was YES. [2024-06-27 18:14:00,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18498 conditions, 6996 events. 4243/6996 cut-off events. For 6432/6435 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 46639 event pairs, 1874 based on Foata normal form. 12/6538 useless extension candidates. Maximal degree in co-relation 18481. Up to 5853 conditions per place. [2024-06-27 18:14:00,100 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 78 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2024-06-27 18:14:00,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 115 transitions, 662 flow [2024-06-27 18:14:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:14:00,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:14:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-27 18:14:00,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2024-06-27 18:14:00,102 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 306 flow. Second operand 6 states and 190 transitions. [2024-06-27 18:14:00,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 115 transitions, 662 flow [2024-06-27 18:14:00,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 115 transitions, 650 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 18:14:00,107 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 381 flow [2024-06-27 18:14:00,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-27 18:14:00,108 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-27 18:14:00,108 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 381 flow [2024-06-27 18:14:00,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:00,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:00,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:00,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:14:00,109 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:00,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:00,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1671725330, now seen corresponding path program 1 times [2024-06-27 18:14:00,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:00,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600067903] [2024-06-27 18:14:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:00,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:00,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:00,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600067903] [2024-06-27 18:14:00,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600067903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:00,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:00,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:14:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048941805] [2024-06-27 18:14:00,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:00,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:14:00,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:14:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:14:00,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:14:00,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 381 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 18:14:00,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:00,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:14:00,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:01,407 INFO L124 PetriNetUnfolderBase]: 4248/6375 cut-off events. [2024-06-27 18:14:01,407 INFO L125 PetriNetUnfolderBase]: For 8356/8356 co-relation queries the response was YES. [2024-06-27 18:14:01,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19451 conditions, 6375 events. 4248/6375 cut-off events. For 8356/8356 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 37341 event pairs, 1370 based on Foata normal form. 2/6095 useless extension candidates. Maximal degree in co-relation 19430. Up to 6056 conditions per place. [2024-06-27 18:14:01,436 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 69 selfloop transitions, 10 changer transitions 0/90 dead transitions. [2024-06-27 18:14:01,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 90 transitions, 587 flow [2024-06-27 18:14:01,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:14:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:14:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 18:14:01,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-27 18:14:01,438 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 381 flow. Second operand 5 states and 133 transitions. [2024-06-27 18:14:01,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 90 transitions, 587 flow [2024-06-27 18:14:01,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 518 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:14:01,444 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 341 flow [2024-06-27 18:14:01,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-27 18:14:01,445 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2024-06-27 18:14:01,445 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 341 flow [2024-06-27 18:14:01,445 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 18:14:01,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:01,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:01,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:14:01,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:01,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:01,446 INFO L85 PathProgramCache]: Analyzing trace with hash -314349586, now seen corresponding path program 1 times [2024-06-27 18:14:01,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:01,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867316183] [2024-06-27 18:14:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:01,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:02,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:02,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867316183] [2024-06-27 18:14:02,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867316183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:02,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:02,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:14:02,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849862854] [2024-06-27 18:14:02,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:02,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:14:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:14:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:14:02,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:14:02,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 341 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 18:14:02,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:02,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:14:02,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:02,873 INFO L124 PetriNetUnfolderBase]: 4236/6394 cut-off events. [2024-06-27 18:14:02,873 INFO L125 PetriNetUnfolderBase]: For 8823/8823 co-relation queries the response was YES. [2024-06-27 18:14:02,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19143 conditions, 6394 events. 4236/6394 cut-off events. For 8823/8823 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 37217 event pairs, 1266 based on Foata normal form. 4/6130 useless extension candidates. Maximal degree in co-relation 19120. Up to 6002 conditions per place. [2024-06-27 18:14:02,906 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 79 selfloop transitions, 14 changer transitions 0/104 dead transitions. [2024-06-27 18:14:02,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 625 flow [2024-06-27 18:14:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:14:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:14:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 18:14:02,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590277777777778 [2024-06-27 18:14:02,908 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 341 flow. Second operand 6 states and 161 transitions. [2024-06-27 18:14:02,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 625 flow [2024-06-27 18:14:02,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 104 transitions, 596 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 18:14:02,916 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 385 flow [2024-06-27 18:14:02,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-27 18:14:02,917 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 16 predicate places. [2024-06-27 18:14:02,917 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 385 flow [2024-06-27 18:14:02,918 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 18:14:02,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:02,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:02,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:14:02,918 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:02,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:02,919 INFO L85 PathProgramCache]: Analyzing trace with hash -315256575, now seen corresponding path program 1 times [2024-06-27 18:14:02,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:02,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254982796] [2024-06-27 18:14:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:02,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:02,975 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 18:14:02,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:02,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254982796] [2024-06-27 18:14:02,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254982796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:02,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:02,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:14:02,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200759051] [2024-06-27 18:14:02,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:02,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:14:02,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:02,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:14:02,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:14:02,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 48 [2024-06-27 18:14:02,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 385 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:02,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:02,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 48 [2024-06-27 18:14:02,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:03,224 INFO L124 PetriNetUnfolderBase]: 1310/2607 cut-off events. [2024-06-27 18:14:03,224 INFO L125 PetriNetUnfolderBase]: For 3480/3781 co-relation queries the response was YES. [2024-06-27 18:14:03,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6393 conditions, 2607 events. 1310/2607 cut-off events. For 3480/3781 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19590 event pairs, 233 based on Foata normal form. 6/2387 useless extension candidates. Maximal degree in co-relation 6371. Up to 1615 conditions per place. [2024-06-27 18:14:03,239 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 26 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2024-06-27 18:14:03,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 73 transitions, 405 flow [2024-06-27 18:14:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:14:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:14:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-06-27 18:14:03,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7430555555555556 [2024-06-27 18:14:03,241 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 385 flow. Second operand 3 states and 107 transitions. [2024-06-27 18:14:03,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 73 transitions, 405 flow [2024-06-27 18:14:03,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 73 transitions, 375 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 18:14:03,244 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 307 flow [2024-06-27 18:14:03,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 18:14:03,246 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-27 18:14:03,246 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 307 flow [2024-06-27 18:14:03,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:03,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:03,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:03,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:14:03,247 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:03,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash -487325811, now seen corresponding path program 1 times [2024-06-27 18:14:03,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:03,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965869521] [2024-06-27 18:14:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:03,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:03,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:03,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965869521] [2024-06-27 18:14:03,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965869521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:03,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:03,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:14:03,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826933213] [2024-06-27 18:14:03,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:03,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:14:03,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:03,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:14:03,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:14:03,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:03,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 307 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 18:14:03,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:03,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:03,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:04,612 INFO L124 PetriNetUnfolderBase]: 4404/6441 cut-off events. [2024-06-27 18:14:04,612 INFO L125 PetriNetUnfolderBase]: For 13845/13851 co-relation queries the response was YES. [2024-06-27 18:14:04,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20233 conditions, 6441 events. 4404/6441 cut-off events. For 13845/13851 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 35780 event pairs, 1320 based on Foata normal form. 8/6438 useless extension candidates. Maximal degree in co-relation 20211. Up to 6043 conditions per place. [2024-06-27 18:14:04,647 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 81 selfloop transitions, 30 changer transitions 5/126 dead transitions. [2024-06-27 18:14:04,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 126 transitions, 785 flow [2024-06-27 18:14:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 18:14:04,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 18:14:04,651 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 307 flow. Second operand 7 states and 189 transitions. [2024-06-27 18:14:04,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 126 transitions, 785 flow [2024-06-27 18:14:04,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 126 transitions, 759 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:14:04,665 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 480 flow [2024-06-27 18:14:04,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=480, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-27 18:14:04,666 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-06-27 18:14:04,667 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 480 flow [2024-06-27 18:14:04,667 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 18:14:04,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:04,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:04,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:14:04,667 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:04,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:04,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1160622997, now seen corresponding path program 2 times [2024-06-27 18:14:04,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:04,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969490196] [2024-06-27 18:14:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:04,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:05,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:05,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969490196] [2024-06-27 18:14:05,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969490196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:05,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:05,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:14:05,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364959707] [2024-06-27 18:14:05,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:05,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:14:05,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:05,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:14:05,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:14:05,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:05,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 480 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 18:14:05,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:05,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:05,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:05,966 INFO L124 PetriNetUnfolderBase]: 3886/5713 cut-off events. [2024-06-27 18:14:05,967 INFO L125 PetriNetUnfolderBase]: For 14225/14233 co-relation queries the response was YES. [2024-06-27 18:14:05,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19037 conditions, 5713 events. 3886/5713 cut-off events. For 14225/14233 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 31457 event pairs, 1198 based on Foata normal form. 10/5711 useless extension candidates. Maximal degree in co-relation 19011. Up to 5317 conditions per place. [2024-06-27 18:14:05,999 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 74 selfloop transitions, 34 changer transitions 0/118 dead transitions. [2024-06-27 18:14:05,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 872 flow [2024-06-27 18:14:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:14:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:14:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 18:14:06,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 18:14:06,000 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 480 flow. Second operand 6 states and 156 transitions. [2024-06-27 18:14:06,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 872 flow [2024-06-27 18:14:06,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 833 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 18:14:06,014 INFO L231 Difference]: Finished difference. Result has 76 places, 85 transitions, 580 flow [2024-06-27 18:14:06,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=580, PETRI_PLACES=76, PETRI_TRANSITIONS=85} [2024-06-27 18:14:06,014 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2024-06-27 18:14:06,015 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 85 transitions, 580 flow [2024-06-27 18:14:06,015 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 18:14:06,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:06,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:06,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:14:06,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:06,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:06,016 INFO L85 PathProgramCache]: Analyzing trace with hash -210236467, now seen corresponding path program 3 times [2024-06-27 18:14:06,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:06,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170847585] [2024-06-27 18:14:06,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:06,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:06,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:06,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170847585] [2024-06-27 18:14:06,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170847585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:06,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:06,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:14:06,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70042095] [2024-06-27 18:14:06,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:06,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:14:06,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:14:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:14:06,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:06,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 85 transitions, 580 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 18:14:06,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:06,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:06,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:07,338 INFO L124 PetriNetUnfolderBase]: 3869/5683 cut-off events. [2024-06-27 18:14:07,338 INFO L125 PetriNetUnfolderBase]: For 16525/16533 co-relation queries the response was YES. [2024-06-27 18:14:07,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19304 conditions, 5683 events. 3869/5683 cut-off events. For 16525/16533 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 31082 event pairs, 1212 based on Foata normal form. 4/5663 useless extension candidates. Maximal degree in co-relation 19277. Up to 5296 conditions per place. [2024-06-27 18:14:07,370 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 70 selfloop transitions, 35 changer transitions 0/115 dead transitions. [2024-06-27 18:14:07,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 886 flow [2024-06-27 18:14:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:14:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:14:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:14:07,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-27 18:14:07,372 INFO L175 Difference]: Start difference. First operand has 76 places, 85 transitions, 580 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:14:07,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 886 flow [2024-06-27 18:14:07,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 115 transitions, 833 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 18:14:07,387 INFO L231 Difference]: Finished difference. Result has 79 places, 85 transitions, 607 flow [2024-06-27 18:14:07,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=607, PETRI_PLACES=79, PETRI_TRANSITIONS=85} [2024-06-27 18:14:07,388 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-06-27 18:14:07,388 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 85 transitions, 607 flow [2024-06-27 18:14:07,388 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 18:14:07,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:07,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:07,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:14:07,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:07,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:07,389 INFO L85 PathProgramCache]: Analyzing trace with hash 110797039, now seen corresponding path program 1 times [2024-06-27 18:14:07,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:07,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704925673] [2024-06-27 18:14:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:07,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:07,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704925673] [2024-06-27 18:14:07,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704925673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:07,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:07,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:07,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732182604] [2024-06-27 18:14:07,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:07,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:07,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:07,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:07,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:08,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:08,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 85 transitions, 607 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 18:14:08,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:08,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:08,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:08,950 INFO L124 PetriNetUnfolderBase]: 3961/5835 cut-off events. [2024-06-27 18:14:08,950 INFO L125 PetriNetUnfolderBase]: For 17436/17444 co-relation queries the response was YES. [2024-06-27 18:14:08,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19840 conditions, 5835 events. 3961/5835 cut-off events. For 17436/17444 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 32227 event pairs, 996 based on Foata normal form. 9/5829 useless extension candidates. Maximal degree in co-relation 19812. Up to 5136 conditions per place. [2024-06-27 18:14:08,975 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 88 selfloop transitions, 39 changer transitions 0/137 dead transitions. [2024-06-27 18:14:08,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 137 transitions, 1071 flow [2024-06-27 18:14:08,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 18:14:08,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-27 18:14:08,977 INFO L175 Difference]: Start difference. First operand has 79 places, 85 transitions, 607 flow. Second operand 7 states and 186 transitions. [2024-06-27 18:14:08,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 137 transitions, 1071 flow [2024-06-27 18:14:08,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 137 transitions, 956 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:14:08,990 INFO L231 Difference]: Finished difference. Result has 80 places, 92 transitions, 635 flow [2024-06-27 18:14:08,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=635, PETRI_PLACES=80, PETRI_TRANSITIONS=92} [2024-06-27 18:14:08,991 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 26 predicate places. [2024-06-27 18:14:08,991 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 92 transitions, 635 flow [2024-06-27 18:14:08,991 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 18:14:08,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:08,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:08,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:14:08,991 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:08,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2072605517, now seen corresponding path program 2 times [2024-06-27 18:14:08,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:08,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103237840] [2024-06-27 18:14:08,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:08,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:09,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:09,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103237840] [2024-06-27 18:14:09,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103237840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:09,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:09,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:09,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221688353] [2024-06-27 18:14:09,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:09,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:09,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:09,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:09,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 92 transitions, 635 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 18:14:09,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:09,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:09,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:10,498 INFO L124 PetriNetUnfolderBase]: 4007/5897 cut-off events. [2024-06-27 18:14:10,498 INFO L125 PetriNetUnfolderBase]: For 20926/20934 co-relation queries the response was YES. [2024-06-27 18:14:10,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21344 conditions, 5897 events. 4007/5897 cut-off events. For 20926/20934 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 32481 event pairs, 1006 based on Foata normal form. 5/5873 useless extension candidates. Maximal degree in co-relation 21315. Up to 5157 conditions per place. [2024-06-27 18:14:10,530 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 90 selfloop transitions, 45 changer transitions 0/145 dead transitions. [2024-06-27 18:14:10,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 145 transitions, 1171 flow [2024-06-27 18:14:10,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 18:14:10,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-27 18:14:10,532 INFO L175 Difference]: Start difference. First operand has 80 places, 92 transitions, 635 flow. Second operand 7 states and 187 transitions. [2024-06-27 18:14:10,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 145 transitions, 1171 flow [2024-06-27 18:14:10,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 145 transitions, 1128 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 18:14:10,554 INFO L231 Difference]: Finished difference. Result has 84 places, 98 transitions, 749 flow [2024-06-27 18:14:10,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=749, PETRI_PLACES=84, PETRI_TRANSITIONS=98} [2024-06-27 18:14:10,555 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-27 18:14:10,555 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 98 transitions, 749 flow [2024-06-27 18:14:10,555 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 18:14:10,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:10,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:10,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:14:10,556 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:10,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:10,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1130851247, now seen corresponding path program 3 times [2024-06-27 18:14:10,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:10,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216907324] [2024-06-27 18:14:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:10,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:11,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:11,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216907324] [2024-06-27 18:14:11,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216907324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:11,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:11,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:11,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463968338] [2024-06-27 18:14:11,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:11,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:11,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:11,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:11,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:11,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:11,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 98 transitions, 749 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 18:14:11,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:11,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:11,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:12,038 INFO L124 PetriNetUnfolderBase]: 3997/5883 cut-off events. [2024-06-27 18:14:12,039 INFO L125 PetriNetUnfolderBase]: For 24464/24472 co-relation queries the response was YES. [2024-06-27 18:14:12,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22069 conditions, 5883 events. 3997/5883 cut-off events. For 24464/24472 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 32405 event pairs, 1006 based on Foata normal form. 5/5859 useless extension candidates. Maximal degree in co-relation 22038. Up to 5153 conditions per place. [2024-06-27 18:14:12,072 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 82 selfloop transitions, 48 changer transitions 0/140 dead transitions. [2024-06-27 18:14:12,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 140 transitions, 1169 flow [2024-06-27 18:14:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:14:12,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-27 18:14:12,074 INFO L175 Difference]: Start difference. First operand has 84 places, 98 transitions, 749 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:14:12,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 140 transitions, 1169 flow [2024-06-27 18:14:12,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 140 transitions, 1111 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 18:14:12,105 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 795 flow [2024-06-27 18:14:12,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=795, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-06-27 18:14:12,106 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 35 predicate places. [2024-06-27 18:14:12,106 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 795 flow [2024-06-27 18:14:12,106 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 18:14:12,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:12,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:12,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:14:12,106 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:12,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:12,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1981101669, now seen corresponding path program 1 times [2024-06-27 18:14:12,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:12,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742841654] [2024-06-27 18:14:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:12,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:12,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:12,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742841654] [2024-06-27 18:14:12,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742841654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:12,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:12,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:14:12,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660619446] [2024-06-27 18:14:12,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:14:12,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:14:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:14:12,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-06-27 18:14:12,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 795 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:12,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:12,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-06-27 18:14:12,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:13,175 INFO L124 PetriNetUnfolderBase]: 3253/5458 cut-off events. [2024-06-27 18:14:13,176 INFO L125 PetriNetUnfolderBase]: For 23098/23110 co-relation queries the response was YES. [2024-06-27 18:14:13,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19396 conditions, 5458 events. 3253/5458 cut-off events. For 23098/23110 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 35506 event pairs, 1248 based on Foata normal form. 3/5349 useless extension candidates. Maximal degree in co-relation 19362. Up to 4642 conditions per place. [2024-06-27 18:14:13,206 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 89 selfloop transitions, 9 changer transitions 0/119 dead transitions. [2024-06-27 18:14:13,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 1084 flow [2024-06-27 18:14:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:14:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:14:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-27 18:14:13,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 18:14:13,207 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 795 flow. Second operand 5 states and 126 transitions. [2024-06-27 18:14:13,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 1084 flow [2024-06-27 18:14:13,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 119 transitions, 950 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 18:14:13,229 INFO L231 Difference]: Finished difference. Result has 88 places, 105 transitions, 757 flow [2024-06-27 18:14:13,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=757, PETRI_PLACES=88, PETRI_TRANSITIONS=105} [2024-06-27 18:14:13,230 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 34 predicate places. [2024-06-27 18:14:13,230 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 105 transitions, 757 flow [2024-06-27 18:14:13,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:13,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:13,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:13,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:14:13,230 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:13,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:13,231 INFO L85 PathProgramCache]: Analyzing trace with hash 489992485, now seen corresponding path program 1 times [2024-06-27 18:14:13,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:13,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450118623] [2024-06-27 18:14:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:13,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:13,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:13,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450118623] [2024-06-27 18:14:13,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450118623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:13,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:13,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:13,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191381873] [2024-06-27 18:14:13,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:13,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:13,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:13,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:13,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:13,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:13,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 757 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:13,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:13,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:13,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:14,805 INFO L124 PetriNetUnfolderBase]: 4045/6531 cut-off events. [2024-06-27 18:14:14,806 INFO L125 PetriNetUnfolderBase]: For 29000/29009 co-relation queries the response was YES. [2024-06-27 18:14:14,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23615 conditions, 6531 events. 4045/6531 cut-off events. For 29000/29009 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 40499 event pairs, 1166 based on Foata normal form. 10/6347 useless extension candidates. Maximal degree in co-relation 23580. Up to 5195 conditions per place. [2024-06-27 18:14:14,843 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 97 selfloop transitions, 49 changer transitions 0/156 dead transitions. [2024-06-27 18:14:14,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 156 transitions, 1275 flow [2024-06-27 18:14:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 18:14:14,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-27 18:14:14,845 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 757 flow. Second operand 7 states and 190 transitions. [2024-06-27 18:14:14,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 156 transitions, 1275 flow [2024-06-27 18:14:14,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 156 transitions, 1252 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 18:14:14,870 INFO L231 Difference]: Finished difference. Result has 93 places, 108 transitions, 873 flow [2024-06-27 18:14:14,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=873, PETRI_PLACES=93, PETRI_TRANSITIONS=108} [2024-06-27 18:14:14,870 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 39 predicate places. [2024-06-27 18:14:14,871 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 108 transitions, 873 flow [2024-06-27 18:14:14,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:14,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:14,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:14,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:14:14,871 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:14,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:14,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1332841521, now seen corresponding path program 2 times [2024-06-27 18:14:14,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:14,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885276147] [2024-06-27 18:14:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:14,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:15,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:15,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885276147] [2024-06-27 18:14:15,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885276147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:15,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:15,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:15,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521720882] [2024-06-27 18:14:15,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:15,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:15,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:15,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:15,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:15,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 108 transitions, 873 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 18:14:15,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:15,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:15,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:16,653 INFO L124 PetriNetUnfolderBase]: 4091/6592 cut-off events. [2024-06-27 18:14:16,653 INFO L125 PetriNetUnfolderBase]: For 33566/33571 co-relation queries the response was YES. [2024-06-27 18:14:16,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24694 conditions, 6592 events. 4091/6592 cut-off events. For 33566/33571 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 40740 event pairs, 1176 based on Foata normal form. 4/6402 useless extension candidates. Maximal degree in co-relation 24657. Up to 5234 conditions per place. [2024-06-27 18:14:16,689 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 103 selfloop transitions, 51 changer transitions 0/164 dead transitions. [2024-06-27 18:14:16,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 164 transitions, 1429 flow [2024-06-27 18:14:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:16,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 18:14:16,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494791666666666 [2024-06-27 18:14:16,691 INFO L175 Difference]: Start difference. First operand has 93 places, 108 transitions, 873 flow. Second operand 8 states and 211 transitions. [2024-06-27 18:14:16,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 164 transitions, 1429 flow [2024-06-27 18:14:16,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 164 transitions, 1275 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:14:16,726 INFO L231 Difference]: Finished difference. Result has 95 places, 111 transitions, 867 flow [2024-06-27 18:14:16,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=867, PETRI_PLACES=95, PETRI_TRANSITIONS=111} [2024-06-27 18:14:16,727 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2024-06-27 18:14:16,727 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 111 transitions, 867 flow [2024-06-27 18:14:16,727 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 18:14:16,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:16,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:16,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:14:16,728 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:16,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash -173737197, now seen corresponding path program 3 times [2024-06-27 18:14:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:16,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679727524] [2024-06-27 18:14:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:16,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:17,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:17,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679727524] [2024-06-27 18:14:17,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679727524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:17,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:17,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:17,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646600119] [2024-06-27 18:14:17,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:17,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:17,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:17,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:17,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:17,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:17,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 111 transitions, 867 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 18:14:17,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:17,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:17,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:18,495 INFO L124 PetriNetUnfolderBase]: 4137/6254 cut-off events. [2024-06-27 18:14:18,495 INFO L125 PetriNetUnfolderBase]: For 35457/35465 co-relation queries the response was YES. [2024-06-27 18:14:18,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24735 conditions, 6254 events. 4137/6254 cut-off events. For 35457/35465 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 35933 event pairs, 1073 based on Foata normal form. 5/6180 useless extension candidates. Maximal degree in co-relation 24698. Up to 5273 conditions per place. [2024-06-27 18:14:18,532 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 102 selfloop transitions, 56 changer transitions 0/168 dead transitions. [2024-06-27 18:14:18,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 168 transitions, 1440 flow [2024-06-27 18:14:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:14:18,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-27 18:14:18,533 INFO L175 Difference]: Start difference. First operand has 95 places, 111 transitions, 867 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:14:18,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 168 transitions, 1440 flow [2024-06-27 18:14:18,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 168 transitions, 1353 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 18:14:18,568 INFO L231 Difference]: Finished difference. Result has 98 places, 114 transitions, 935 flow [2024-06-27 18:14:18,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=935, PETRI_PLACES=98, PETRI_TRANSITIONS=114} [2024-06-27 18:14:18,568 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 44 predicate places. [2024-06-27 18:14:18,568 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 114 transitions, 935 flow [2024-06-27 18:14:18,569 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 18:14:18,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:18,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:18,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:14:18,569 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:18,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash 828276423, now seen corresponding path program 4 times [2024-06-27 18:14:18,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:18,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011045781] [2024-06-27 18:14:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:18,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:19,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:19,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011045781] [2024-06-27 18:14:19,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011045781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:19,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:19,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:19,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276463893] [2024-06-27 18:14:19,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:19,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:19,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:19,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:19,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 114 transitions, 935 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 18:14:19,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:19,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:19,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:20,400 INFO L124 PetriNetUnfolderBase]: 4127/6256 cut-off events. [2024-06-27 18:14:20,401 INFO L125 PetriNetUnfolderBase]: For 38684/38692 co-relation queries the response was YES. [2024-06-27 18:14:20,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24890 conditions, 6256 events. 4127/6256 cut-off events. For 38684/38692 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 36088 event pairs, 1045 based on Foata normal form. 5/6191 useless extension candidates. Maximal degree in co-relation 24852. Up to 5265 conditions per place. [2024-06-27 18:14:20,440 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 103 selfloop transitions, 59 changer transitions 0/172 dead transitions. [2024-06-27 18:14:20,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 172 transitions, 1435 flow [2024-06-27 18:14:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:14:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:14:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:14:20,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-27 18:14:20,441 INFO L175 Difference]: Start difference. First operand has 98 places, 114 transitions, 935 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:14:20,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 172 transitions, 1435 flow [2024-06-27 18:14:20,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 172 transitions, 1332 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 18:14:20,485 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 958 flow [2024-06-27 18:14:20,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=958, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2024-06-27 18:14:20,485 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-06-27 18:14:20,485 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 958 flow [2024-06-27 18:14:20,486 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 18:14:20,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:20,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:20,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:14:20,486 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:20,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1758387254, now seen corresponding path program 1 times [2024-06-27 18:14:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:20,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563510664] [2024-06-27 18:14:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:20,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:21,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:21,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563510664] [2024-06-27 18:14:21,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563510664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:21,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:21,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:21,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742084788] [2024-06-27 18:14:21,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:21,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:21,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:21,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:21,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:21,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:14:21,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 958 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 18:14:21,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:21,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:14:21,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:22,339 INFO L124 PetriNetUnfolderBase]: 3596/5927 cut-off events. [2024-06-27 18:14:22,340 INFO L125 PetriNetUnfolderBase]: For 37208/37210 co-relation queries the response was YES. [2024-06-27 18:14:22,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22746 conditions, 5927 events. 3596/5927 cut-off events. For 37208/37210 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 37800 event pairs, 1246 based on Foata normal form. 4/5813 useless extension candidates. Maximal degree in co-relation 22706. Up to 5076 conditions per place. [2024-06-27 18:14:22,370 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 132 selfloop transitions, 19 changer transitions 0/162 dead transitions. [2024-06-27 18:14:22,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 162 transitions, 1431 flow [2024-06-27 18:14:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:22,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:22,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:14:22,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-27 18:14:22,372 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 958 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:14:22,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 162 transitions, 1431 flow [2024-06-27 18:14:22,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 162 transitions, 1224 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 18:14:22,400 INFO L231 Difference]: Finished difference. Result has 101 places, 119 transitions, 849 flow [2024-06-27 18:14:22,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=849, PETRI_PLACES=101, PETRI_TRANSITIONS=119} [2024-06-27 18:14:22,401 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2024-06-27 18:14:22,401 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 119 transitions, 849 flow [2024-06-27 18:14:22,401 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 18:14:22,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:22,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:22,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:14:22,401 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:22,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1266736585, now seen corresponding path program 1 times [2024-06-27 18:14:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:22,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158705375] [2024-06-27 18:14:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:22,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:23,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:23,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158705375] [2024-06-27 18:14:23,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158705375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:23,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:23,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:14:23,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034810688] [2024-06-27 18:14:23,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:23,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:14:23,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:23,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:14:23,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:14:23,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-06-27 18:14:23,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 119 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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 18:14:23,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:23,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-06-27 18:14:23,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:23,833 INFO L124 PetriNetUnfolderBase]: 3372/5626 cut-off events. [2024-06-27 18:14:23,834 INFO L125 PetriNetUnfolderBase]: For 36914/36928 co-relation queries the response was YES. [2024-06-27 18:14:23,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21626 conditions, 5626 events. 3372/5626 cut-off events. For 36914/36928 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 36318 event pairs, 1233 based on Foata normal form. 6/5529 useless extension candidates. Maximal degree in co-relation 21585. Up to 4785 conditions per place. [2024-06-27 18:14:23,862 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 109 selfloop transitions, 12 changer transitions 0/142 dead transitions. [2024-06-27 18:14:23,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 142 transitions, 1175 flow [2024-06-27 18:14:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:14:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:14:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 18:14:23,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 18:14:23,863 INFO L175 Difference]: Start difference. First operand has 101 places, 119 transitions, 849 flow. Second operand 6 states and 150 transitions. [2024-06-27 18:14:23,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 142 transitions, 1175 flow [2024-06-27 18:14:23,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1122 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 18:14:23,892 INFO L231 Difference]: Finished difference. Result has 102 places, 122 transitions, 858 flow [2024-06-27 18:14:23,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=858, PETRI_PLACES=102, PETRI_TRANSITIONS=122} [2024-06-27 18:14:23,893 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-06-27 18:14:23,893 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 122 transitions, 858 flow [2024-06-27 18:14:23,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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 18:14:23,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:23,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:23,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:14:23,893 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:23,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:23,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1749910446, now seen corresponding path program 1 times [2024-06-27 18:14:23,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:23,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983978923] [2024-06-27 18:14:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:23,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:24,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983978923] [2024-06-27 18:14:24,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983978923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:24,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:24,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:24,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700116419] [2024-06-27 18:14:24,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:24,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:24,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:24,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:24,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:24,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 122 transitions, 858 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:24,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:24,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:24,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:25,440 INFO L124 PetriNetUnfolderBase]: 4162/6491 cut-off events. [2024-06-27 18:14:25,440 INFO L125 PetriNetUnfolderBase]: For 48045/48050 co-relation queries the response was YES. [2024-06-27 18:14:25,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26233 conditions, 6491 events. 4162/6491 cut-off events. For 48045/48050 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 38892 event pairs, 864 based on Foata normal form. 6/6376 useless extension candidates. Maximal degree in co-relation 26191. Up to 5509 conditions per place. [2024-06-27 18:14:25,480 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 120 selfloop transitions, 37 changer transitions 0/167 dead transitions. [2024-06-27 18:14:25,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 167 transitions, 1404 flow [2024-06-27 18:14:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:14:25,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 18:14:25,482 INFO L175 Difference]: Start difference. First operand has 102 places, 122 transitions, 858 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:14:25,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 167 transitions, 1404 flow [2024-06-27 18:14:25,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 167 transitions, 1364 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 18:14:25,520 INFO L231 Difference]: Finished difference. Result has 105 places, 126 transitions, 947 flow [2024-06-27 18:14:25,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=947, PETRI_PLACES=105, PETRI_TRANSITIONS=126} [2024-06-27 18:14:25,520 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-06-27 18:14:25,520 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 126 transitions, 947 flow [2024-06-27 18:14:25,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:25,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:25,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:25,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:14:25,521 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:25,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1747053486, now seen corresponding path program 2 times [2024-06-27 18:14:25,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:25,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366755549] [2024-06-27 18:14:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:25,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:26,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:26,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366755549] [2024-06-27 18:14:26,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366755549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:26,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:26,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:26,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573315395] [2024-06-27 18:14:26,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:26,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:26,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:26,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:26,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:26,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:26,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 126 transitions, 947 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:26,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:26,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:26,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:27,033 INFO L124 PetriNetUnfolderBase]: 4154/6478 cut-off events. [2024-06-27 18:14:27,034 INFO L125 PetriNetUnfolderBase]: For 52181/52186 co-relation queries the response was YES. [2024-06-27 18:14:27,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26782 conditions, 6478 events. 4154/6478 cut-off events. For 52181/52186 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 38747 event pairs, 1154 based on Foata normal form. 6/6361 useless extension candidates. Maximal degree in co-relation 26739. Up to 5645 conditions per place. [2024-06-27 18:14:27,072 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 118 selfloop transitions, 38 changer transitions 0/166 dead transitions. [2024-06-27 18:14:27,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 166 transitions, 1385 flow [2024-06-27 18:14:27,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:14:27,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-27 18:14:27,073 INFO L175 Difference]: Start difference. First operand has 105 places, 126 transitions, 947 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:14:27,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 166 transitions, 1385 flow [2024-06-27 18:14:27,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 166 transitions, 1319 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 18:14:27,119 INFO L231 Difference]: Finished difference. Result has 109 places, 126 transitions, 966 flow [2024-06-27 18:14:27,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=966, PETRI_PLACES=109, PETRI_TRANSITIONS=126} [2024-06-27 18:14:27,119 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2024-06-27 18:14:27,120 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 126 transitions, 966 flow [2024-06-27 18:14:27,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:27,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:27,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:27,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:14:27,120 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:27,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash 601704300, now seen corresponding path program 1 times [2024-06-27 18:14:27,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:27,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656501951] [2024-06-27 18:14:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:27,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:27,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:27,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656501951] [2024-06-27 18:14:27,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656501951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:27,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:27,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:14:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325348002] [2024-06-27 18:14:27,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:27,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:14:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:14:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:14:27,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:14:27,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 126 transitions, 966 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 18:14:27,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:27,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:14:27,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:28,354 INFO L124 PetriNetUnfolderBase]: 3910/6333 cut-off events. [2024-06-27 18:14:28,354 INFO L125 PetriNetUnfolderBase]: For 55021/55031 co-relation queries the response was YES. [2024-06-27 18:14:28,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25920 conditions, 6333 events. 3910/6333 cut-off events. For 55021/55031 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 40254 event pairs, 1391 based on Foata normal form. 11/6219 useless extension candidates. Maximal degree in co-relation 25875. Up to 5530 conditions per place. [2024-06-27 18:14:28,390 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 123 selfloop transitions, 15 changer transitions 0/160 dead transitions. [2024-06-27 18:14:28,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 160 transitions, 1408 flow [2024-06-27 18:14:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:14:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:14:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 18:14:28,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-06-27 18:14:28,392 INFO L175 Difference]: Start difference. First operand has 109 places, 126 transitions, 966 flow. Second operand 6 states and 149 transitions. [2024-06-27 18:14:28,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 160 transitions, 1408 flow [2024-06-27 18:14:28,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 160 transitions, 1315 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:14:28,434 INFO L231 Difference]: Finished difference. Result has 110 places, 135 transitions, 1017 flow [2024-06-27 18:14:28,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1017, PETRI_PLACES=110, PETRI_TRANSITIONS=135} [2024-06-27 18:14:28,434 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2024-06-27 18:14:28,434 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 135 transitions, 1017 flow [2024-06-27 18:14:28,435 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 18:14:28,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:28,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:28,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:14:28,435 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:28,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:28,435 INFO L85 PathProgramCache]: Analyzing trace with hash 614114220, now seen corresponding path program 2 times [2024-06-27 18:14:28,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:28,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704610692] [2024-06-27 18:14:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:28,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:28,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:28,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704610692] [2024-06-27 18:14:28,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704610692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:28,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:28,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:14:28,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293673109] [2024-06-27 18:14:28,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:28,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:14:28,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:14:28,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:14:28,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:14:28,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 135 transitions, 1017 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 18:14:28,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:28,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:14:28,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:29,633 INFO L124 PetriNetUnfolderBase]: 3914/6341 cut-off events. [2024-06-27 18:14:29,633 INFO L125 PetriNetUnfolderBase]: For 60292/60326 co-relation queries the response was YES. [2024-06-27 18:14:29,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26793 conditions, 6341 events. 3914/6341 cut-off events. For 60292/60326 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 40362 event pairs, 1392 based on Foata normal form. 25/6237 useless extension candidates. Maximal degree in co-relation 26746. Up to 5513 conditions per place. [2024-06-27 18:14:29,681 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 118 selfloop transitions, 20 changer transitions 0/160 dead transitions. [2024-06-27 18:14:29,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1403 flow [2024-06-27 18:14:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:14:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:14:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 18:14:29,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-06-27 18:14:29,682 INFO L175 Difference]: Start difference. First operand has 110 places, 135 transitions, 1017 flow. Second operand 6 states and 146 transitions. [2024-06-27 18:14:29,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1403 flow [2024-06-27 18:14:29,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 160 transitions, 1363 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 18:14:29,790 INFO L231 Difference]: Finished difference. Result has 113 places, 138 transitions, 1061 flow [2024-06-27 18:14:29,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1061, PETRI_PLACES=113, PETRI_TRANSITIONS=138} [2024-06-27 18:14:29,791 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 59 predicate places. [2024-06-27 18:14:29,791 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 138 transitions, 1061 flow [2024-06-27 18:14:29,791 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 18:14:29,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:29,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:29,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:14:29,791 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:29,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:29,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2057161134, now seen corresponding path program 1 times [2024-06-27 18:14:29,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:29,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288948631] [2024-06-27 18:14:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:29,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:30,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:30,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288948631] [2024-06-27 18:14:30,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288948631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:30,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:30,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:14:30,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005537718] [2024-06-27 18:14:30,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:30,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:14:30,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:30,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:14:30,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:14:30,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:14:30,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 138 transitions, 1061 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 18:14:30,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:30,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:14:30,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:30,969 INFO L124 PetriNetUnfolderBase]: 3665/5988 cut-off events. [2024-06-27 18:14:30,970 INFO L125 PetriNetUnfolderBase]: For 57199/57201 co-relation queries the response was YES. [2024-06-27 18:14:30,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26048 conditions, 5988 events. 3665/5988 cut-off events. For 57199/57201 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 37799 event pairs, 1216 based on Foata normal form. 1/5880 useless extension candidates. Maximal degree in co-relation 26000. Up to 5239 conditions per place. [2024-06-27 18:14:31,009 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 141 selfloop transitions, 13 changer transitions 0/165 dead transitions. [2024-06-27 18:14:31,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 165 transitions, 1495 flow [2024-06-27 18:14:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:14:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:14:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 18:14:31,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-06-27 18:14:31,010 INFO L175 Difference]: Start difference. First operand has 113 places, 138 transitions, 1061 flow. Second operand 6 states and 146 transitions. [2024-06-27 18:14:31,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 165 transitions, 1495 flow [2024-06-27 18:14:31,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 165 transitions, 1433 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 18:14:31,071 INFO L231 Difference]: Finished difference. Result has 116 places, 145 transitions, 1114 flow [2024-06-27 18:14:31,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1114, PETRI_PLACES=116, PETRI_TRANSITIONS=145} [2024-06-27 18:14:31,071 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 62 predicate places. [2024-06-27 18:14:31,071 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 145 transitions, 1114 flow [2024-06-27 18:14:31,071 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 18:14:31,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:31,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:31,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:14:31,072 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:31,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash 614120172, now seen corresponding path program 2 times [2024-06-27 18:14:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:31,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756601307] [2024-06-27 18:14:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:31,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:31,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756601307] [2024-06-27 18:14:31,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756601307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:31,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:31,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:14:31,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616679298] [2024-06-27 18:14:31,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:31,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:14:31,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:31,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:14:31,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:14:31,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:14:31,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 145 transitions, 1114 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 18:14:31,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:31,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:14:31,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:32,350 INFO L124 PetriNetUnfolderBase]: 3667/6009 cut-off events. [2024-06-27 18:14:32,351 INFO L125 PetriNetUnfolderBase]: For 62500/62508 co-relation queries the response was YES. [2024-06-27 18:14:32,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26920 conditions, 6009 events. 3667/6009 cut-off events. For 62500/62508 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 38141 event pairs, 1212 based on Foata normal form. 5/5898 useless extension candidates. Maximal degree in co-relation 26870. Up to 5222 conditions per place. [2024-06-27 18:14:32,396 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 138 selfloop transitions, 18 changer transitions 0/167 dead transitions. [2024-06-27 18:14:32,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 167 transitions, 1526 flow [2024-06-27 18:14:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:14:32,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:14:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 18:14:32,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-06-27 18:14:32,397 INFO L175 Difference]: Start difference. First operand has 116 places, 145 transitions, 1114 flow. Second operand 6 states and 146 transitions. [2024-06-27 18:14:32,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 167 transitions, 1526 flow [2024-06-27 18:14:32,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 167 transitions, 1481 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 18:14:32,473 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1153 flow [2024-06-27 18:14:32,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1153, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2024-06-27 18:14:32,474 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2024-06-27 18:14:32,474 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1153 flow [2024-06-27 18:14:32,475 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 18:14:32,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:32,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:32,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:14:32,475 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:32,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1587352424, now seen corresponding path program 1 times [2024-06-27 18:14:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:32,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731689013] [2024-06-27 18:14:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:33,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:33,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731689013] [2024-06-27 18:14:33,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731689013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:33,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:33,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:33,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019302703] [2024-06-27 18:14:33,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:33,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:33,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:33,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:33,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:33,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:33,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1153 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:33,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:33,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:33,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:34,236 INFO L124 PetriNetUnfolderBase]: 4480/7262 cut-off events. [2024-06-27 18:14:34,237 INFO L125 PetriNetUnfolderBase]: For 91826/91834 co-relation queries the response was YES. [2024-06-27 18:14:34,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33480 conditions, 7262 events. 4480/7262 cut-off events. For 91826/91834 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 46248 event pairs, 928 based on Foata normal form. 17/7112 useless extension candidates. Maximal degree in co-relation 33429. Up to 4947 conditions per place. [2024-06-27 18:14:34,282 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 142 selfloop transitions, 57 changer transitions 0/209 dead transitions. [2024-06-27 18:14:34,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 209 transitions, 1883 flow [2024-06-27 18:14:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 18:14:34,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598958333333334 [2024-06-27 18:14:34,283 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1153 flow. Second operand 8 states and 215 transitions. [2024-06-27 18:14:34,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 209 transitions, 1883 flow [2024-06-27 18:14:34,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 209 transitions, 1821 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 18:14:34,361 INFO L231 Difference]: Finished difference. Result has 123 places, 150 transitions, 1249 flow [2024-06-27 18:14:34,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1249, PETRI_PLACES=123, PETRI_TRANSITIONS=150} [2024-06-27 18:14:34,362 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-06-27 18:14:34,362 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 150 transitions, 1249 flow [2024-06-27 18:14:34,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:34,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:34,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:34,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:14:34,362 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:34,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1819893768, now seen corresponding path program 2 times [2024-06-27 18:14:34,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:34,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238015639] [2024-06-27 18:14:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:34,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:35,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:35,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238015639] [2024-06-27 18:14:35,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238015639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:35,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:35,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:35,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759479768] [2024-06-27 18:14:35,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:35,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:35,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:35,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:35,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:35,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:35,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 150 transitions, 1249 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:35,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:35,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:35,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:36,314 INFO L124 PetriNetUnfolderBase]: 4684/7529 cut-off events. [2024-06-27 18:14:36,314 INFO L125 PetriNetUnfolderBase]: For 103204/103212 co-relation queries the response was YES. [2024-06-27 18:14:36,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35813 conditions, 7529 events. 4684/7529 cut-off events. For 103204/103212 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 48254 event pairs, 1403 based on Foata normal form. 25/7403 useless extension candidates. Maximal degree in co-relation 35761. Up to 5859 conditions per place. [2024-06-27 18:14:36,370 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 132 selfloop transitions, 64 changer transitions 0/206 dead transitions. [2024-06-27 18:14:36,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 206 transitions, 1869 flow [2024-06-27 18:14:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 18:14:36,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-06-27 18:14:36,372 INFO L175 Difference]: Start difference. First operand has 123 places, 150 transitions, 1249 flow. Second operand 8 states and 212 transitions. [2024-06-27 18:14:36,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 206 transitions, 1869 flow [2024-06-27 18:14:36,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 206 transitions, 1797 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 18:14:36,466 INFO L231 Difference]: Finished difference. Result has 127 places, 152 transitions, 1349 flow [2024-06-27 18:14:36,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1349, PETRI_PLACES=127, PETRI_TRANSITIONS=152} [2024-06-27 18:14:36,466 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 73 predicate places. [2024-06-27 18:14:36,467 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 152 transitions, 1349 flow [2024-06-27 18:14:36,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:36,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:36,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:36,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:14:36,467 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:36,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:36,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1702260560, now seen corresponding path program 3 times [2024-06-27 18:14:36,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:36,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680089855] [2024-06-27 18:14:36,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:36,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:37,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:37,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680089855] [2024-06-27 18:14:37,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680089855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:37,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:37,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:37,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430814800] [2024-06-27 18:14:37,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:37,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:37,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:37,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:37,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:37,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 152 transitions, 1349 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:37,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:37,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:37,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:38,433 INFO L124 PetriNetUnfolderBase]: 4814/7747 cut-off events. [2024-06-27 18:14:38,433 INFO L125 PetriNetUnfolderBase]: For 110913/110921 co-relation queries the response was YES. [2024-06-27 18:14:38,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37857 conditions, 7747 events. 4814/7747 cut-off events. For 110913/110921 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 50007 event pairs, 1405 based on Foata normal form. 17/7613 useless extension candidates. Maximal degree in co-relation 37803. Up to 5839 conditions per place. [2024-06-27 18:14:38,488 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 137 selfloop transitions, 64 changer transitions 0/211 dead transitions. [2024-06-27 18:14:38,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 211 transitions, 1983 flow [2024-06-27 18:14:38,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:38,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 18:14:38,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598958333333334 [2024-06-27 18:14:38,491 INFO L175 Difference]: Start difference. First operand has 127 places, 152 transitions, 1349 flow. Second operand 8 states and 215 transitions. [2024-06-27 18:14:38,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 211 transitions, 1983 flow [2024-06-27 18:14:38,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 211 transitions, 1839 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 18:14:38,597 INFO L231 Difference]: Finished difference. Result has 129 places, 153 transitions, 1363 flow [2024-06-27 18:14:38,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1363, PETRI_PLACES=129, PETRI_TRANSITIONS=153} [2024-06-27 18:14:38,597 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-27 18:14:38,598 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 153 transitions, 1363 flow [2024-06-27 18:14:38,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:38,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:38,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:38,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:14:38,598 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:38,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:38,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1472953182, now seen corresponding path program 1 times [2024-06-27 18:14:38,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:38,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901237212] [2024-06-27 18:14:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:38,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:39,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:39,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901237212] [2024-06-27 18:14:39,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901237212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:39,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:39,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:39,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568960426] [2024-06-27 18:14:39,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:39,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:39,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:39,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:39,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:39,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 153 transitions, 1363 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 18:14:39,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:39,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:39,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:40,172 INFO L124 PetriNetUnfolderBase]: 4848/7845 cut-off events. [2024-06-27 18:14:40,172 INFO L125 PetriNetUnfolderBase]: For 112376/112392 co-relation queries the response was YES. [2024-06-27 18:14:40,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38132 conditions, 7845 events. 4848/7845 cut-off events. For 112376/112392 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 51119 event pairs, 1615 based on Foata normal form. 16/7697 useless extension candidates. Maximal degree in co-relation 38077. Up to 6789 conditions per place. [2024-06-27 18:14:40,235 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 163 selfloop transitions, 43 changer transitions 0/216 dead transitions. [2024-06-27 18:14:40,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 216 transitions, 2232 flow [2024-06-27 18:14:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:14:40,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 18:14:40,236 INFO L175 Difference]: Start difference. First operand has 129 places, 153 transitions, 1363 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:14:40,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 216 transitions, 2232 flow [2024-06-27 18:14:40,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 216 transitions, 2060 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:14:40,347 INFO L231 Difference]: Finished difference. Result has 132 places, 183 transitions, 1728 flow [2024-06-27 18:14:40,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1728, PETRI_PLACES=132, PETRI_TRANSITIONS=183} [2024-06-27 18:14:40,347 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 78 predicate places. [2024-06-27 18:14:40,347 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 183 transitions, 1728 flow [2024-06-27 18:14:40,348 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 18:14:40,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:40,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:40,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:14:40,348 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:40,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:40,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1840820592, now seen corresponding path program 4 times [2024-06-27 18:14:40,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:40,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432816507] [2024-06-27 18:14:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:40,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:41,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:41,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432816507] [2024-06-27 18:14:41,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432816507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:41,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:41,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:41,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378713256] [2024-06-27 18:14:41,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:41,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:41,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:41,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:41,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:41,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 183 transitions, 1728 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:41,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:41,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:41,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:42,343 INFO L124 PetriNetUnfolderBase]: 5091/8224 cut-off events. [2024-06-27 18:14:42,344 INFO L125 PetriNetUnfolderBase]: For 133054/133074 co-relation queries the response was YES. [2024-06-27 18:14:42,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41668 conditions, 8224 events. 5091/8224 cut-off events. For 133054/133074 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 53933 event pairs, 1175 based on Foata normal form. 31/8100 useless extension candidates. Maximal degree in co-relation 41610. Up to 6124 conditions per place. [2024-06-27 18:14:42,414 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 156 selfloop transitions, 82 changer transitions 0/248 dead transitions. [2024-06-27 18:14:42,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 248 transitions, 2598 flow [2024-06-27 18:14:42,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-27 18:14:42,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2024-06-27 18:14:42,415 INFO L175 Difference]: Start difference. First operand has 132 places, 183 transitions, 1728 flow. Second operand 8 states and 220 transitions. [2024-06-27 18:14:42,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 248 transitions, 2598 flow [2024-06-27 18:14:42,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 248 transitions, 2506 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 18:14:42,549 INFO L231 Difference]: Finished difference. Result has 137 places, 185 transitions, 1856 flow [2024-06-27 18:14:42,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1856, PETRI_PLACES=137, PETRI_TRANSITIONS=185} [2024-06-27 18:14:42,549 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 83 predicate places. [2024-06-27 18:14:42,549 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 185 transitions, 1856 flow [2024-06-27 18:14:42,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:42,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:42,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:42,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:14:42,550 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:42,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:42,550 INFO L85 PathProgramCache]: Analyzing trace with hash 960487408, now seen corresponding path program 5 times [2024-06-27 18:14:42,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:42,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478634036] [2024-06-27 18:14:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:42,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:43,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478634036] [2024-06-27 18:14:43,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478634036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:43,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:43,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:14:43,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932872101] [2024-06-27 18:14:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:43,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:14:43,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:14:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:14:43,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:43,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 185 transitions, 1856 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 18:14:43,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:43,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:43,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:44,882 INFO L124 PetriNetUnfolderBase]: 5258/8545 cut-off events. [2024-06-27 18:14:44,882 INFO L125 PetriNetUnfolderBase]: For 148149/148157 co-relation queries the response was YES. [2024-06-27 18:14:44,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43875 conditions, 8545 events. 5258/8545 cut-off events. For 148149/148157 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 56913 event pairs, 1580 based on Foata normal form. 21/8389 useless extension candidates. Maximal degree in co-relation 43816. Up to 6779 conditions per place. [2024-06-27 18:14:44,948 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 157 selfloop transitions, 82 changer transitions 0/249 dead transitions. [2024-06-27 18:14:44,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 249 transitions, 2608 flow [2024-06-27 18:14:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:14:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:14:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:14:44,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-06-27 18:14:44,949 INFO L175 Difference]: Start difference. First operand has 137 places, 185 transitions, 1856 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:14:44,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 249 transitions, 2608 flow [2024-06-27 18:14:45,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 249 transitions, 2493 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 18:14:45,109 INFO L231 Difference]: Finished difference. Result has 142 places, 186 transitions, 1940 flow [2024-06-27 18:14:45,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1741, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1940, PETRI_PLACES=142, PETRI_TRANSITIONS=186} [2024-06-27 18:14:45,110 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 88 predicate places. [2024-06-27 18:14:45,110 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 186 transitions, 1940 flow [2024-06-27 18:14:45,110 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 18:14:45,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:45,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:45,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:14:45,110 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:45,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:45,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1563584540, now seen corresponding path program 6 times [2024-06-27 18:14:45,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:45,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556916870] [2024-06-27 18:14:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:45,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:45,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:45,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556916870] [2024-06-27 18:14:45,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556916870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:45,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:45,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:45,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270849079] [2024-06-27 18:14:45,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:45,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:45,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:45,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:45,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:45,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:45,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 186 transitions, 1940 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:45,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:45,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:45,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:47,199 INFO L124 PetriNetUnfolderBase]: 5425/8845 cut-off events. [2024-06-27 18:14:47,199 INFO L125 PetriNetUnfolderBase]: For 158619/158639 co-relation queries the response was YES. [2024-06-27 18:14:47,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45878 conditions, 8845 events. 5425/8845 cut-off events. For 158619/158639 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 59452 event pairs, 1589 based on Foata normal form. 35/8697 useless extension candidates. Maximal degree in co-relation 45817. Up to 7036 conditions per place. [2024-06-27 18:14:47,267 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 153 selfloop transitions, 82 changer transitions 0/245 dead transitions. [2024-06-27 18:14:47,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 245 transitions, 2672 flow [2024-06-27 18:14:47,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 18:14:47,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598958333333334 [2024-06-27 18:14:47,268 INFO L175 Difference]: Start difference. First operand has 142 places, 186 transitions, 1940 flow. Second operand 8 states and 215 transitions. [2024-06-27 18:14:47,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 245 transitions, 2672 flow [2024-06-27 18:14:47,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 245 transitions, 2497 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 18:14:47,424 INFO L231 Difference]: Finished difference. Result has 143 places, 187 transitions, 1966 flow [2024-06-27 18:14:47,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1966, PETRI_PLACES=143, PETRI_TRANSITIONS=187} [2024-06-27 18:14:47,425 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 89 predicate places. [2024-06-27 18:14:47,425 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 187 transitions, 1966 flow [2024-06-27 18:14:47,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:47,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:47,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:47,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:14:47,425 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:47,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:47,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1472965272, now seen corresponding path program 2 times [2024-06-27 18:14:47,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:47,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095213816] [2024-06-27 18:14:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:47,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:47,982 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 18:14:47,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:47,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095213816] [2024-06-27 18:14:47,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095213816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:47,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:47,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:47,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673071516] [2024-06-27 18:14:47,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:47,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:47,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:47,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:47,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:48,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:48,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 187 transitions, 1966 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 18:14:48,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:48,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:48,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:49,193 INFO L124 PetriNetUnfolderBase]: 5501/9009 cut-off events. [2024-06-27 18:14:49,193 INFO L125 PetriNetUnfolderBase]: For 159002/159010 co-relation queries the response was YES. [2024-06-27 18:14:49,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46663 conditions, 9009 events. 5501/9009 cut-off events. For 159002/159010 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 61116 event pairs, 1850 based on Foata normal form. 6/8817 useless extension candidates. Maximal degree in co-relation 46601. Up to 7689 conditions per place. [2024-06-27 18:14:49,260 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 167 selfloop transitions, 46 changer transitions 0/223 dead transitions. [2024-06-27 18:14:49,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 223 transitions, 2658 flow [2024-06-27 18:14:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:14:49,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 18:14:49,261 INFO L175 Difference]: Start difference. First operand has 143 places, 187 transitions, 1966 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:14:49,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 223 transitions, 2658 flow [2024-06-27 18:14:49,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 223 transitions, 2481 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 18:14:49,422 INFO L231 Difference]: Finished difference. Result has 145 places, 195 transitions, 2024 flow [2024-06-27 18:14:49,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1789, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2024, PETRI_PLACES=145, PETRI_TRANSITIONS=195} [2024-06-27 18:14:49,422 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2024-06-27 18:14:49,422 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 195 transitions, 2024 flow [2024-06-27 18:14:49,422 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 18:14:49,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:49,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:49,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:14:49,423 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:49,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2128800988, now seen corresponding path program 1 times [2024-06-27 18:14:49,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:49,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815008980] [2024-06-27 18:14:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:49,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:50,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:50,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815008980] [2024-06-27 18:14:50,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815008980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:50,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:50,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:50,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657409462] [2024-06-27 18:14:50,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:50,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:50,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:50,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:50,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:50,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:14:50,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 195 transitions, 2024 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:50,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:50,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:14:50,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:51,362 INFO L124 PetriNetUnfolderBase]: 5246/8723 cut-off events. [2024-06-27 18:14:51,362 INFO L125 PetriNetUnfolderBase]: For 162901/162923 co-relation queries the response was YES. [2024-06-27 18:14:51,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45460 conditions, 8723 events. 5246/8723 cut-off events. For 162901/162923 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 60382 event pairs, 1765 based on Foata normal form. 23/8510 useless extension candidates. Maximal degree in co-relation 45396. Up to 7491 conditions per place. [2024-06-27 18:14:51,439 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 175 selfloop transitions, 18 changer transitions 0/228 dead transitions. [2024-06-27 18:14:51,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 228 transitions, 2564 flow [2024-06-27 18:14:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:14:51,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-27 18:14:51,440 INFO L175 Difference]: Start difference. First operand has 145 places, 195 transitions, 2024 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:14:51,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 228 transitions, 2564 flow [2024-06-27 18:14:51,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 228 transitions, 2470 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 18:14:51,646 INFO L231 Difference]: Finished difference. Result has 149 places, 198 transitions, 2018 flow [2024-06-27 18:14:51,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2018, PETRI_PLACES=149, PETRI_TRANSITIONS=198} [2024-06-27 18:14:51,647 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2024-06-27 18:14:51,647 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 198 transitions, 2018 flow [2024-06-27 18:14:51,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:51,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:51,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:51,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:14:51,647 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:51,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:51,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1685494768, now seen corresponding path program 7 times [2024-06-27 18:14:51,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:51,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032525379] [2024-06-27 18:14:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:51,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:52,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:52,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032525379] [2024-06-27 18:14:52,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032525379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:52,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:52,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:14:52,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381966199] [2024-06-27 18:14:52,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:52,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:14:52,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:52,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:14:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:14:52,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:52,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 198 transitions, 2018 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 18:14:52,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:52,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:52,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:54,139 INFO L124 PetriNetUnfolderBase]: 5685/9270 cut-off events. [2024-06-27 18:14:54,139 INFO L125 PetriNetUnfolderBase]: For 188219/188233 co-relation queries the response was YES. [2024-06-27 18:14:54,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49870 conditions, 9270 events. 5685/9270 cut-off events. For 188219/188233 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 62882 event pairs, 1636 based on Foata normal form. 23/9087 useless extension candidates. Maximal degree in co-relation 49804. Up to 7419 conditions per place. [2024-06-27 18:14:54,222 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 169 selfloop transitions, 90 changer transitions 0/269 dead transitions. [2024-06-27 18:14:54,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 269 transitions, 2844 flow [2024-06-27 18:14:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:14:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:14:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-27 18:14:54,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5395833333333333 [2024-06-27 18:14:54,223 INFO L175 Difference]: Start difference. First operand has 149 places, 198 transitions, 2018 flow. Second operand 10 states and 259 transitions. [2024-06-27 18:14:54,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 269 transitions, 2844 flow [2024-06-27 18:14:54,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 269 transitions, 2778 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 18:14:54,528 INFO L231 Difference]: Finished difference. Result has 154 places, 199 transitions, 2171 flow [2024-06-27 18:14:54,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2171, PETRI_PLACES=154, PETRI_TRANSITIONS=199} [2024-06-27 18:14:54,529 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 100 predicate places. [2024-06-27 18:14:54,529 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 199 transitions, 2171 flow [2024-06-27 18:14:54,529 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 18:14:54,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:54,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:54,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:14:54,529 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:54,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash -629207056, now seen corresponding path program 8 times [2024-06-27 18:14:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:54,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269925861] [2024-06-27 18:14:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:54,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:55,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:55,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269925861] [2024-06-27 18:14:55,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269925861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:55,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:55,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:14:55,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222299558] [2024-06-27 18:14:55,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:55,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:14:55,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:14:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:14:55,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:55,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 199 transitions, 2171 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 18:14:55,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:55,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:55,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:56,897 INFO L124 PetriNetUnfolderBase]: 5649/9210 cut-off events. [2024-06-27 18:14:56,898 INFO L125 PetriNetUnfolderBase]: For 189494/189508 co-relation queries the response was YES. [2024-06-27 18:14:56,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49882 conditions, 9210 events. 5649/9210 cut-off events. For 189494/189508 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 62479 event pairs, 1642 based on Foata normal form. 23/9013 useless extension candidates. Maximal degree in co-relation 49815. Up to 7363 conditions per place. [2024-06-27 18:14:56,979 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 171 selfloop transitions, 84 changer transitions 0/265 dead transitions. [2024-06-27 18:14:56,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 265 transitions, 2958 flow [2024-06-27 18:14:56,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:14:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:14:56,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 18:14:56,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439814814814815 [2024-06-27 18:14:56,981 INFO L175 Difference]: Start difference. First operand has 154 places, 199 transitions, 2171 flow. Second operand 9 states and 235 transitions. [2024-06-27 18:14:56,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 265 transitions, 2958 flow [2024-06-27 18:14:57,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 265 transitions, 2753 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 18:14:57,206 INFO L231 Difference]: Finished difference. Result has 155 places, 199 transitions, 2141 flow [2024-06-27 18:14:57,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2141, PETRI_PLACES=155, PETRI_TRANSITIONS=199} [2024-06-27 18:14:57,206 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 101 predicate places. [2024-06-27 18:14:57,206 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 199 transitions, 2141 flow [2024-06-27 18:14:57,206 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 18:14:57,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:57,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:57,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:14:57,207 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:57,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:57,207 INFO L85 PathProgramCache]: Analyzing trace with hash 992452487, now seen corresponding path program 1 times [2024-06-27 18:14:57,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:57,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041149486] [2024-06-27 18:14:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:57,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:57,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041149486] [2024-06-27 18:14:57,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041149486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:57,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:57,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:14:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645779616] [2024-06-27 18:14:57,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:57,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:14:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:14:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:14:58,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:14:58,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 199 transitions, 2141 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 18:14:58,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:58,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:14:58,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:59,464 INFO L124 PetriNetUnfolderBase]: 5686/9295 cut-off events. [2024-06-27 18:14:59,464 INFO L125 PetriNetUnfolderBase]: For 182599/182613 co-relation queries the response was YES. [2024-06-27 18:14:59,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49734 conditions, 9295 events. 5686/9295 cut-off events. For 182599/182613 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 63357 event pairs, 1666 based on Foata normal form. 7/9069 useless extension candidates. Maximal degree in co-relation 49666. Up to 7608 conditions per place. [2024-06-27 18:14:59,547 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 166 selfloop transitions, 88 changer transitions 0/264 dead transitions. [2024-06-27 18:14:59,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 264 transitions, 2962 flow [2024-06-27 18:14:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:14:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:14:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 18:14:59,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324074074074074 [2024-06-27 18:14:59,548 INFO L175 Difference]: Start difference. First operand has 155 places, 199 transitions, 2141 flow. Second operand 9 states and 230 transitions. [2024-06-27 18:14:59,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 264 transitions, 2962 flow [2024-06-27 18:14:59,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 264 transitions, 2764 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 18:14:59,787 INFO L231 Difference]: Finished difference. Result has 157 places, 204 transitions, 2205 flow [2024-06-27 18:14:59,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2205, PETRI_PLACES=157, PETRI_TRANSITIONS=204} [2024-06-27 18:14:59,788 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 103 predicate places. [2024-06-27 18:14:59,788 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 204 transitions, 2205 flow [2024-06-27 18:14:59,788 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 18:14:59,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:59,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:59,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:14:59,789 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:59,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash -276045945, now seen corresponding path program 2 times [2024-06-27 18:14:59,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:59,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482159591] [2024-06-27 18:14:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:59,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:00,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:00,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482159591] [2024-06-27 18:15:00,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482159591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:00,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:00,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:15:00,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96077800] [2024-06-27 18:15:00,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:00,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:15:00,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:00,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:15:00,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:15:00,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:00,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 204 transitions, 2205 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 18:15:00,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:00,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:00,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:02,220 INFO L124 PetriNetUnfolderBase]: 5746/9411 cut-off events. [2024-06-27 18:15:02,220 INFO L125 PetriNetUnfolderBase]: For 191709/191723 co-relation queries the response was YES. [2024-06-27 18:15:02,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50985 conditions, 9411 events. 5746/9411 cut-off events. For 191709/191723 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 64413 event pairs, 1665 based on Foata normal form. 7/9182 useless extension candidates. Maximal degree in co-relation 50915. Up to 7678 conditions per place. [2024-06-27 18:15:02,309 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 156 selfloop transitions, 103 changer transitions 0/269 dead transitions. [2024-06-27 18:15:02,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 269 transitions, 3063 flow [2024-06-27 18:15:02,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:15:02,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:15:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 18:15:02,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324074074074074 [2024-06-27 18:15:02,310 INFO L175 Difference]: Start difference. First operand has 157 places, 204 transitions, 2205 flow. Second operand 9 states and 230 transitions. [2024-06-27 18:15:02,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 269 transitions, 3063 flow [2024-06-27 18:15:02,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 269 transitions, 2836 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 18:15:02,519 INFO L231 Difference]: Finished difference. Result has 161 places, 215 transitions, 2350 flow [2024-06-27 18:15:02,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2350, PETRI_PLACES=161, PETRI_TRANSITIONS=215} [2024-06-27 18:15:02,520 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 107 predicate places. [2024-06-27 18:15:02,520 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 215 transitions, 2350 flow [2024-06-27 18:15:02,520 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 18:15:02,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:02,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:02,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:15:02,521 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:02,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:02,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1887966807, now seen corresponding path program 3 times [2024-06-27 18:15:02,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:02,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212528313] [2024-06-27 18:15:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:02,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:03,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:03,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212528313] [2024-06-27 18:15:03,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212528313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:03,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:03,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:15:03,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011285092] [2024-06-27 18:15:03,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:03,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:15:03,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:15:03,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:15:03,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:03,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 215 transitions, 2350 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 18:15:03,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:03,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:03,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:04,975 INFO L124 PetriNetUnfolderBase]: 5831/9575 cut-off events. [2024-06-27 18:15:04,975 INFO L125 PetriNetUnfolderBase]: For 200375/200389 co-relation queries the response was YES. [2024-06-27 18:15:05,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52264 conditions, 9575 events. 5831/9575 cut-off events. For 200375/200389 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 65879 event pairs, 1453 based on Foata normal form. 7/9339 useless extension candidates. Maximal degree in co-relation 52192. Up to 7456 conditions per place. [2024-06-27 18:15:05,060 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 158 selfloop transitions, 112 changer transitions 0/280 dead transitions. [2024-06-27 18:15:05,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 280 transitions, 3362 flow [2024-06-27 18:15:05,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:15:05,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:15:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:15:05,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-06-27 18:15:05,061 INFO L175 Difference]: Start difference. First operand has 161 places, 215 transitions, 2350 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:15:05,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 280 transitions, 3362 flow [2024-06-27 18:15:05,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 280 transitions, 3152 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 18:15:05,282 INFO L231 Difference]: Finished difference. Result has 167 places, 220 transitions, 2505 flow [2024-06-27 18:15:05,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2505, PETRI_PLACES=167, PETRI_TRANSITIONS=220} [2024-06-27 18:15:05,283 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 113 predicate places. [2024-06-27 18:15:05,283 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 220 transitions, 2505 flow [2024-06-27 18:15:05,283 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 18:15:05,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:05,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:05,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:15:05,284 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:05,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:05,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2140976779, now seen corresponding path program 4 times [2024-06-27 18:15:05,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:05,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086716041] [2024-06-27 18:15:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:05,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:06,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:06,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086716041] [2024-06-27 18:15:06,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086716041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:06,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:06,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:15:06,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37858374] [2024-06-27 18:15:06,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:06,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:15:06,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:06,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:15:06,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:15:06,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:06,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 220 transitions, 2505 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 18:15:06,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:06,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:06,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:07,615 INFO L124 PetriNetUnfolderBase]: 5823/9566 cut-off events. [2024-06-27 18:15:07,615 INFO L125 PetriNetUnfolderBase]: For 206380/206394 co-relation queries the response was YES. [2024-06-27 18:15:07,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52095 conditions, 9566 events. 5823/9566 cut-off events. For 206380/206394 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 65855 event pairs, 1702 based on Foata normal form. 7/9333 useless extension candidates. Maximal degree in co-relation 52021. Up to 7801 conditions per place. [2024-06-27 18:15:07,701 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 163 selfloop transitions, 102 changer transitions 0/275 dead transitions. [2024-06-27 18:15:07,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 275 transitions, 3254 flow [2024-06-27 18:15:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:15:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:15:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 18:15:07,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324074074074074 [2024-06-27 18:15:07,705 INFO L175 Difference]: Start difference. First operand has 167 places, 220 transitions, 2505 flow. Second operand 9 states and 230 transitions. [2024-06-27 18:15:07,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 275 transitions, 3254 flow [2024-06-27 18:15:07,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 275 transitions, 2986 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 18:15:07,976 INFO L231 Difference]: Finished difference. Result has 171 places, 221 transitions, 2469 flow [2024-06-27 18:15:07,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2469, PETRI_PLACES=171, PETRI_TRANSITIONS=221} [2024-06-27 18:15:07,977 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 117 predicate places. [2024-06-27 18:15:07,977 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 221 transitions, 2469 flow [2024-06-27 18:15:07,977 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 18:15:07,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:07,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:07,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:15:07,977 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:07,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:07,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1857673226, now seen corresponding path program 2 times [2024-06-27 18:15:07,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:07,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524682543] [2024-06-27 18:15:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:07,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:08,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:08,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524682543] [2024-06-27 18:15:08,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524682543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:08,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:08,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:08,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074531135] [2024-06-27 18:15:08,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:08,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:08,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:08,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:15:08,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 221 transitions, 2469 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:08,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:08,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:15:08,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:09,982 INFO L124 PetriNetUnfolderBase]: 5563/9525 cut-off events. [2024-06-27 18:15:09,983 INFO L125 PetriNetUnfolderBase]: For 205049/205095 co-relation queries the response was YES. [2024-06-27 18:15:10,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49915 conditions, 9525 events. 5563/9525 cut-off events. For 205049/205095 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 69020 event pairs, 1715 based on Foata normal form. 33/9252 useless extension candidates. Maximal degree in co-relation 49839. Up to 7960 conditions per place. [2024-06-27 18:15:10,069 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 193 selfloop transitions, 23 changer transitions 0/251 dead transitions. [2024-06-27 18:15:10,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 251 transitions, 3063 flow [2024-06-27 18:15:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:10,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 18:15:10,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:15:10,070 INFO L175 Difference]: Start difference. First operand has 171 places, 221 transitions, 2469 flow. Second operand 7 states and 168 transitions. [2024-06-27 18:15:10,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 251 transitions, 3063 flow [2024-06-27 18:15:10,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 251 transitions, 2840 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 18:15:10,317 INFO L231 Difference]: Finished difference. Result has 172 places, 224 transitions, 2354 flow [2024-06-27 18:15:10,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2354, PETRI_PLACES=172, PETRI_TRANSITIONS=224} [2024-06-27 18:15:10,317 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 118 predicate places. [2024-06-27 18:15:10,320 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 224 transitions, 2354 flow [2024-06-27 18:15:10,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:10,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:10,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:10,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:15:10,320 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:10,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:10,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1855294208, now seen corresponding path program 3 times [2024-06-27 18:15:10,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:10,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030375943] [2024-06-27 18:15:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:10,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:10,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:10,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030375943] [2024-06-27 18:15:10,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030375943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:10,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:10,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:10,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239502075] [2024-06-27 18:15:10,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:10,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:10,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:10,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:10,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:10,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:10,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 224 transitions, 2354 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 18:15:10,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:10,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:10,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:12,342 INFO L124 PetriNetUnfolderBase]: 5871/9807 cut-off events. [2024-06-27 18:15:12,343 INFO L125 PetriNetUnfolderBase]: For 217396/217416 co-relation queries the response was YES. [2024-06-27 18:15:12,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52420 conditions, 9807 events. 5871/9807 cut-off events. For 217396/217416 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 68994 event pairs, 1761 based on Foata normal form. 9/9552 useless extension candidates. Maximal degree in co-relation 52343. Up to 8145 conditions per place. [2024-06-27 18:15:12,417 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 189 selfloop transitions, 59 changer transitions 0/258 dead transitions. [2024-06-27 18:15:12,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 258 transitions, 3242 flow [2024-06-27 18:15:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:15:12,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-27 18:15:12,418 INFO L175 Difference]: Start difference. First operand has 172 places, 224 transitions, 2354 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:15:12,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 258 transitions, 3242 flow [2024-06-27 18:15:12,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 258 transitions, 3156 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 18:15:12,655 INFO L231 Difference]: Finished difference. Result has 175 places, 232 transitions, 2548 flow [2024-06-27 18:15:12,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2268, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2548, PETRI_PLACES=175, PETRI_TRANSITIONS=232} [2024-06-27 18:15:12,655 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2024-06-27 18:15:12,655 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 232 transitions, 2548 flow [2024-06-27 18:15:12,655 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 18:15:12,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:12,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:12,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:15:12,656 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:12,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1858148456, now seen corresponding path program 3 times [2024-06-27 18:15:12,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:12,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306063193] [2024-06-27 18:15:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:12,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:13,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:13,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306063193] [2024-06-27 18:15:13,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306063193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:13,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:13,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:13,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280475964] [2024-06-27 18:15:13,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:13,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:13,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:13,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:13,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:13,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:15:13,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 232 transitions, 2548 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:13,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:13,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:15:13,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:14,673 INFO L124 PetriNetUnfolderBase]: 5595/9570 cut-off events. [2024-06-27 18:15:14,674 INFO L125 PetriNetUnfolderBase]: For 227630/227676 co-relation queries the response was YES. [2024-06-27 18:15:14,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51770 conditions, 9570 events. 5595/9570 cut-off events. For 227630/227676 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 69324 event pairs, 1701 based on Foata normal form. 33/9295 useless extension candidates. Maximal degree in co-relation 51691. Up to 7962 conditions per place. [2024-06-27 18:15:14,772 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 197 selfloop transitions, 31 changer transitions 0/265 dead transitions. [2024-06-27 18:15:14,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 265 transitions, 3190 flow [2024-06-27 18:15:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:15:14,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 18:15:14,773 INFO L175 Difference]: Start difference. First operand has 175 places, 232 transitions, 2548 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:15:14,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 265 transitions, 3190 flow [2024-06-27 18:15:15,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 265 transitions, 3014 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 18:15:15,175 INFO L231 Difference]: Finished difference. Result has 179 places, 238 transitions, 2536 flow [2024-06-27 18:15:15,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2536, PETRI_PLACES=179, PETRI_TRANSITIONS=238} [2024-06-27 18:15:15,175 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 125 predicate places. [2024-06-27 18:15:15,175 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 238 transitions, 2536 flow [2024-06-27 18:15:15,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:15,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:15,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:15,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:15:15,176 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:15,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:15,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1650130830, now seen corresponding path program 1 times [2024-06-27 18:15:15,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:15,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573274835] [2024-06-27 18:15:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:15,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:15,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:15,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573274835] [2024-06-27 18:15:15,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573274835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:15,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:15,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:15,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320977022] [2024-06-27 18:15:15,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:15,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:15,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:15,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:15,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:15,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:15:15,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 238 transitions, 2536 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:15,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:15,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:15:15,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:17,358 INFO L124 PetriNetUnfolderBase]: 5598/9407 cut-off events. [2024-06-27 18:15:17,358 INFO L125 PetriNetUnfolderBase]: For 241450/241476 co-relation queries the response was YES. [2024-06-27 18:15:17,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52462 conditions, 9407 events. 5598/9407 cut-off events. For 241450/241476 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 66329 event pairs, 1636 based on Foata normal form. 2/9186 useless extension candidates. Maximal degree in co-relation 52381. Up to 8065 conditions per place. [2024-06-27 18:15:17,453 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 240 selfloop transitions, 17 changer transitions 0/272 dead transitions. [2024-06-27 18:15:17,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 272 transitions, 3219 flow [2024-06-27 18:15:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:17,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:15:17,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-27 18:15:17,456 INFO L175 Difference]: Start difference. First operand has 179 places, 238 transitions, 2536 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:15:17,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 272 transitions, 3219 flow [2024-06-27 18:15:17,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 272 transitions, 3142 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 18:15:17,786 INFO L231 Difference]: Finished difference. Result has 184 places, 245 transitions, 2597 flow [2024-06-27 18:15:17,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2597, PETRI_PLACES=184, PETRI_TRANSITIONS=245} [2024-06-27 18:15:17,787 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 130 predicate places. [2024-06-27 18:15:17,787 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 245 transitions, 2597 flow [2024-06-27 18:15:17,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:17,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:17,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:17,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:15:17,787 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:17,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1650281490, now seen corresponding path program 2 times [2024-06-27 18:15:17,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:17,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481053444] [2024-06-27 18:15:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:17,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:18,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481053444] [2024-06-27 18:15:18,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481053444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:18,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:18,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:18,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767693529] [2024-06-27 18:15:18,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:18,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:18,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:18,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:18,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:18,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:15:18,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 245 transitions, 2597 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:18,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:18,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:15:18,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:19,768 INFO L124 PetriNetUnfolderBase]: 5632/9478 cut-off events. [2024-06-27 18:15:19,768 INFO L125 PetriNetUnfolderBase]: For 253526/253552 co-relation queries the response was YES. [2024-06-27 18:15:19,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54011 conditions, 9478 events. 5632/9478 cut-off events. For 253526/253552 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 67007 event pairs, 1651 based on Foata normal form. 2/9255 useless extension candidates. Maximal degree in co-relation 53927. Up to 8080 conditions per place. [2024-06-27 18:15:19,861 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 238 selfloop transitions, 22 changer transitions 0/275 dead transitions. [2024-06-27 18:15:19,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 275 transitions, 3265 flow [2024-06-27 18:15:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:15:19,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 18:15:19,863 INFO L175 Difference]: Start difference. First operand has 184 places, 245 transitions, 2597 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:15:19,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 275 transitions, 3265 flow [2024-06-27 18:15:20,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 275 transitions, 3196 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 18:15:20,291 INFO L231 Difference]: Finished difference. Result has 187 places, 248 transitions, 2630 flow [2024-06-27 18:15:20,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2630, PETRI_PLACES=187, PETRI_TRANSITIONS=248} [2024-06-27 18:15:20,291 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 133 predicate places. [2024-06-27 18:15:20,291 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 248 transitions, 2630 flow [2024-06-27 18:15:20,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:20,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:20,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:20,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:15:20,292 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:20,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1650281738, now seen corresponding path program 1 times [2024-06-27 18:15:20,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:20,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035212934] [2024-06-27 18:15:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:20,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:20,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:20,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035212934] [2024-06-27 18:15:20,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035212934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:20,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:20,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:20,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055100000] [2024-06-27 18:15:20,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:20,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:20,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:20,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:20,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:20,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:15:20,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 248 transitions, 2630 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:20,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:20,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:15:20,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:22,443 INFO L124 PetriNetUnfolderBase]: 5643/9494 cut-off events. [2024-06-27 18:15:22,443 INFO L125 PetriNetUnfolderBase]: For 265677/265703 co-relation queries the response was YES. [2024-06-27 18:15:22,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54969 conditions, 9494 events. 5643/9494 cut-off events. For 265677/265703 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 67104 event pairs, 1646 based on Foata normal form. 3/9273 useless extension candidates. Maximal degree in co-relation 54884. Up to 8126 conditions per place. [2024-06-27 18:15:22,528 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 246 selfloop transitions, 16 changer transitions 0/277 dead transitions. [2024-06-27 18:15:22,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 277 transitions, 3292 flow [2024-06-27 18:15:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:15:22,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 18:15:22,529 INFO L175 Difference]: Start difference. First operand has 187 places, 248 transitions, 2630 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:15:22,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 277 transitions, 3292 flow [2024-06-27 18:15:22,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 277 transitions, 3212 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 18:15:22,793 INFO L231 Difference]: Finished difference. Result has 189 places, 251 transitions, 2636 flow [2024-06-27 18:15:22,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2636, PETRI_PLACES=189, PETRI_TRANSITIONS=251} [2024-06-27 18:15:22,794 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 135 predicate places. [2024-06-27 18:15:22,794 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 251 transitions, 2636 flow [2024-06-27 18:15:22,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:22,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:22,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:22,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:15:22,794 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:22,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:22,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1858154408, now seen corresponding path program 2 times [2024-06-27 18:15:22,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:22,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965467285] [2024-06-27 18:15:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:22,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:23,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:23,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965467285] [2024-06-27 18:15:23,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965467285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:23,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:23,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616904048] [2024-06-27 18:15:23,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:23,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:23,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:23,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:15:23,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 251 transitions, 2636 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:23,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:23,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:15:23,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:24,898 INFO L124 PetriNetUnfolderBase]: 5741/10015 cut-off events. [2024-06-27 18:15:24,899 INFO L125 PetriNetUnfolderBase]: For 277306/277349 co-relation queries the response was YES. [2024-06-27 18:15:24,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56555 conditions, 10015 events. 5741/10015 cut-off events. For 277306/277349 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 73536 event pairs, 1662 based on Foata normal form. 9/9693 useless extension candidates. Maximal degree in co-relation 56469. Up to 8164 conditions per place. [2024-06-27 18:15:25,004 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 238 selfloop transitions, 31 changer transitions 0/284 dead transitions. [2024-06-27 18:15:25,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 284 transitions, 3466 flow [2024-06-27 18:15:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:15:25,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 18:15:25,005 INFO L175 Difference]: Start difference. First operand has 189 places, 251 transitions, 2636 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:15:25,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 284 transitions, 3466 flow [2024-06-27 18:15:25,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 284 transitions, 3402 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 18:15:25,388 INFO L231 Difference]: Finished difference. Result has 191 places, 257 transitions, 2743 flow [2024-06-27 18:15:25,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2743, PETRI_PLACES=191, PETRI_TRANSITIONS=257} [2024-06-27 18:15:25,389 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 137 predicate places. [2024-06-27 18:15:25,389 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 257 transitions, 2743 flow [2024-06-27 18:15:25,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:25,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:25,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:25,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:15:25,389 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:25,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1857857490, now seen corresponding path program 3 times [2024-06-27 18:15:25,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:25,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692023545] [2024-06-27 18:15:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:25,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:25,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:25,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692023545] [2024-06-27 18:15:25,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692023545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:25,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:25,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:25,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835813624] [2024-06-27 18:15:25,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:25,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:25,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:26,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:15:26,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 257 transitions, 2743 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:26,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:26,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:15:26,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:27,410 INFO L124 PetriNetUnfolderBase]: 5725/9765 cut-off events. [2024-06-27 18:15:27,410 INFO L125 PetriNetUnfolderBase]: For 286447/286482 co-relation queries the response was YES. [2024-06-27 18:15:27,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57161 conditions, 9765 events. 5725/9765 cut-off events. For 286447/286482 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 70374 event pairs, 1649 based on Foata normal form. 4/9504 useless extension candidates. Maximal degree in co-relation 57074. Up to 8163 conditions per place. [2024-06-27 18:15:27,518 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 242 selfloop transitions, 29 changer transitions 0/286 dead transitions. [2024-06-27 18:15:27,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 286 transitions, 3449 flow [2024-06-27 18:15:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:15:27,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 18:15:27,519 INFO L175 Difference]: Start difference. First operand has 191 places, 257 transitions, 2743 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:15:27,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 286 transitions, 3449 flow [2024-06-27 18:15:27,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 286 transitions, 3379 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 18:15:27,998 INFO L231 Difference]: Finished difference. Result has 195 places, 260 transitions, 2799 flow [2024-06-27 18:15:27,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2799, PETRI_PLACES=195, PETRI_TRANSITIONS=260} [2024-06-27 18:15:27,999 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 141 predicate places. [2024-06-27 18:15:27,999 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 260 transitions, 2799 flow [2024-06-27 18:15:27,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:27,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:27,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:27,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:15:27,999 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:27,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1855479154, now seen corresponding path program 3 times [2024-06-27 18:15:28,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:28,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044053118] [2024-06-27 18:15:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:28,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:28,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:28,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044053118] [2024-06-27 18:15:28,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044053118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:28,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:28,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:28,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047157970] [2024-06-27 18:15:28,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:28,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:28,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:28,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:28,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:28,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:15:28,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 260 transitions, 2799 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:28,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:28,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:15:28,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:30,123 INFO L124 PetriNetUnfolderBase]: 5716/9746 cut-off events. [2024-06-27 18:15:30,123 INFO L125 PetriNetUnfolderBase]: For 294603/294638 co-relation queries the response was YES. [2024-06-27 18:15:30,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57712 conditions, 9746 events. 5716/9746 cut-off events. For 294603/294638 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 70214 event pairs, 1625 based on Foata normal form. 9/9487 useless extension candidates. Maximal degree in co-relation 57623. Up to 8207 conditions per place. [2024-06-27 18:15:30,222 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 249 selfloop transitions, 21 changer transitions 0/285 dead transitions. [2024-06-27 18:15:30,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 285 transitions, 3441 flow [2024-06-27 18:15:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:15:30,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 18:15:30,223 INFO L175 Difference]: Start difference. First operand has 195 places, 260 transitions, 2799 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:15:30,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 285 transitions, 3441 flow [2024-06-27 18:15:30,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 285 transitions, 3313 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 18:15:30,679 INFO L231 Difference]: Finished difference. Result has 197 places, 260 transitions, 2719 flow [2024-06-27 18:15:30,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=190, 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=7, PETRI_FLOW=2719, PETRI_PLACES=197, PETRI_TRANSITIONS=260} [2024-06-27 18:15:30,680 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 143 predicate places. [2024-06-27 18:15:30,680 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 260 transitions, 2719 flow [2024-06-27 18:15:30,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:30,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:30,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:30,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:15:30,681 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:30,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:30,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1592921054, now seen corresponding path program 1 times [2024-06-27 18:15:30,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:30,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823257888] [2024-06-27 18:15:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:30,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:31,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:31,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823257888] [2024-06-27 18:15:31,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823257888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:31,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:31,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:15:31,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461214527] [2024-06-27 18:15:31,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:31,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:15:31,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:15:31,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:15:31,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:31,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 260 transitions, 2719 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:31,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:31,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:31,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:33,148 INFO L124 PetriNetUnfolderBase]: 6102/10107 cut-off events. [2024-06-27 18:15:33,148 INFO L125 PetriNetUnfolderBase]: For 301876/301899 co-relation queries the response was YES. [2024-06-27 18:15:33,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59599 conditions, 10107 events. 6102/10107 cut-off events. For 301876/301899 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 70711 event pairs, 1801 based on Foata normal form. 22/9892 useless extension candidates. Maximal degree in co-relation 59509. Up to 8634 conditions per place. [2024-06-27 18:15:33,248 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 245 selfloop transitions, 47 changer transitions 0/302 dead transitions. [2024-06-27 18:15:33,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 302 transitions, 3513 flow [2024-06-27 18:15:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:15:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:15:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 18:15:33,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130208333333334 [2024-06-27 18:15:33,250 INFO L175 Difference]: Start difference. First operand has 197 places, 260 transitions, 2719 flow. Second operand 8 states and 197 transitions. [2024-06-27 18:15:33,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 302 transitions, 3513 flow [2024-06-27 18:15:33,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 302 transitions, 3451 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:15:33,583 INFO L231 Difference]: Finished difference. Result has 199 places, 264 transitions, 2834 flow [2024-06-27 18:15:33,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2657, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2834, PETRI_PLACES=199, PETRI_TRANSITIONS=264} [2024-06-27 18:15:33,583 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 145 predicate places. [2024-06-27 18:15:33,583 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 264 transitions, 2834 flow [2024-06-27 18:15:33,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:33,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:33,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:33,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:15:33,584 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:33,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:33,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1251187175, now seen corresponding path program 1 times [2024-06-27 18:15:33,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:33,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179268617] [2024-06-27 18:15:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:33,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:34,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:34,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179268617] [2024-06-27 18:15:34,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179268617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:34,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:34,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:34,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840193472] [2024-06-27 18:15:34,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:34,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:34,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:34,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:34,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:34,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:34,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 264 transitions, 2834 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 18:15:34,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:34,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:34,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:35,669 INFO L124 PetriNetUnfolderBase]: 6136/10158 cut-off events. [2024-06-27 18:15:35,669 INFO L125 PetriNetUnfolderBase]: For 315378/315389 co-relation queries the response was YES. [2024-06-27 18:15:35,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61247 conditions, 10158 events. 6136/10158 cut-off events. For 315378/315389 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 71095 event pairs, 1804 based on Foata normal form. 8/9925 useless extension candidates. Maximal degree in co-relation 61156. Up to 8694 conditions per place. [2024-06-27 18:15:35,780 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 245 selfloop transitions, 44 changer transitions 0/299 dead transitions. [2024-06-27 18:15:35,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 299 transitions, 3580 flow [2024-06-27 18:15:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:15:35,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 18:15:35,781 INFO L175 Difference]: Start difference. First operand has 199 places, 264 transitions, 2834 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:15:35,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 299 transitions, 3580 flow [2024-06-27 18:15:36,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 299 transitions, 3429 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 18:15:36,340 INFO L231 Difference]: Finished difference. Result has 200 places, 269 transitions, 2850 flow [2024-06-27 18:15:36,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2850, PETRI_PLACES=200, PETRI_TRANSITIONS=269} [2024-06-27 18:15:36,341 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 146 predicate places. [2024-06-27 18:15:36,341 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 269 transitions, 2850 flow [2024-06-27 18:15:36,341 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 18:15:36,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:36,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:36,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:15:36,341 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:36,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1326358797, now seen corresponding path program 2 times [2024-06-27 18:15:36,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:36,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496753425] [2024-06-27 18:15:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:36,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:36,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496753425] [2024-06-27 18:15:36,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496753425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:36,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:36,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:36,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834166091] [2024-06-27 18:15:36,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:36,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:36,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:36,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:36,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:36,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 269 transitions, 2850 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 18:15:36,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:36,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:36,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:38,411 INFO L124 PetriNetUnfolderBase]: 6150/10176 cut-off events. [2024-06-27 18:15:38,411 INFO L125 PetriNetUnfolderBase]: For 322847/322858 co-relation queries the response was YES. [2024-06-27 18:15:38,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61364 conditions, 10176 events. 6150/10176 cut-off events. For 322847/322858 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 71216 event pairs, 1809 based on Foata normal form. 8/9944 useless extension candidates. Maximal degree in co-relation 61272. Up to 8597 conditions per place. [2024-06-27 18:15:38,522 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 237 selfloop transitions, 53 changer transitions 0/300 dead transitions. [2024-06-27 18:15:38,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 300 transitions, 3684 flow [2024-06-27 18:15:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:15:38,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 18:15:38,523 INFO L175 Difference]: Start difference. First operand has 200 places, 269 transitions, 2850 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:15:38,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 300 transitions, 3684 flow [2024-06-27 18:15:38,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 300 transitions, 3608 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 18:15:38,974 INFO L231 Difference]: Finished difference. Result has 204 places, 272 transitions, 2943 flow [2024-06-27 18:15:38,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2943, PETRI_PLACES=204, PETRI_TRANSITIONS=272} [2024-06-27 18:15:38,974 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 150 predicate places. [2024-06-27 18:15:38,975 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 272 transitions, 2943 flow [2024-06-27 18:15:38,975 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 18:15:38,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:38,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:38,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:15:38,975 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:38,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash -282980297, now seen corresponding path program 1 times [2024-06-27 18:15:38,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:38,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911291693] [2024-06-27 18:15:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:38,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:39,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:39,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911291693] [2024-06-27 18:15:39,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911291693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:39,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:39,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:15:39,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254979580] [2024-06-27 18:15:39,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:39,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:15:39,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:39,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:15:39,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:15:39,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:40,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 272 transitions, 2943 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 18:15:40,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:40,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:40,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:41,961 INFO L124 PetriNetUnfolderBase]: 6336/10497 cut-off events. [2024-06-27 18:15:41,961 INFO L125 PetriNetUnfolderBase]: For 346698/346709 co-relation queries the response was YES. [2024-06-27 18:15:42,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63270 conditions, 10497 events. 6336/10497 cut-off events. For 346698/346709 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 73834 event pairs, 1692 based on Foata normal form. 14/10260 useless extension candidates. Maximal degree in co-relation 63177. Up to 8067 conditions per place. [2024-06-27 18:15:42,085 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 255 selfloop transitions, 98 changer transitions 0/363 dead transitions. [2024-06-27 18:15:42,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 363 transitions, 4083 flow [2024-06-27 18:15:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:15:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:15:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 308 transitions. [2024-06-27 18:15:42,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2024-06-27 18:15:42,087 INFO L175 Difference]: Start difference. First operand has 204 places, 272 transitions, 2943 flow. Second operand 12 states and 308 transitions. [2024-06-27 18:15:42,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 363 transitions, 4083 flow [2024-06-27 18:15:42,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 363 transitions, 3969 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 18:15:42,658 INFO L231 Difference]: Finished difference. Result has 214 places, 277 transitions, 3114 flow [2024-06-27 18:15:42,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2829, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3114, PETRI_PLACES=214, PETRI_TRANSITIONS=277} [2024-06-27 18:15:42,658 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 160 predicate places. [2024-06-27 18:15:42,658 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 277 transitions, 3114 flow [2024-06-27 18:15:42,658 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 18:15:42,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:42,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:42,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:15:42,659 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:42,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:42,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1582701749, now seen corresponding path program 1 times [2024-06-27 18:15:42,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:42,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562871055] [2024-06-27 18:15:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:42,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:43,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:43,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562871055] [2024-06-27 18:15:43,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562871055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:43,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:43,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:15:43,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220870457] [2024-06-27 18:15:43,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:43,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:15:43,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:43,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:15:43,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:15:43,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:15:43,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 277 transitions, 3114 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:43,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:43,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:15:43,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:45,079 INFO L124 PetriNetUnfolderBase]: 6091/10272 cut-off events. [2024-06-27 18:15:45,080 INFO L125 PetriNetUnfolderBase]: For 346892/346918 co-relation queries the response was YES. [2024-06-27 18:15:45,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62650 conditions, 10272 events. 6091/10272 cut-off events. For 346892/346918 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 74018 event pairs, 1825 based on Foata normal form. 27/10011 useless extension candidates. Maximal degree in co-relation 62554. Up to 8625 conditions per place. [2024-06-27 18:15:45,192 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 251 selfloop transitions, 21 changer transitions 0/315 dead transitions. [2024-06-27 18:15:45,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 315 transitions, 3862 flow [2024-06-27 18:15:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:15:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:15:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 18:15:45,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026041666666666 [2024-06-27 18:15:45,193 INFO L175 Difference]: Start difference. First operand has 214 places, 277 transitions, 3114 flow. Second operand 8 states and 193 transitions. [2024-06-27 18:15:45,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 315 transitions, 3862 flow [2024-06-27 18:15:45,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 315 transitions, 3605 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-27 18:15:45,628 INFO L231 Difference]: Finished difference. Result has 211 places, 280 transitions, 2973 flow [2024-06-27 18:15:45,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2973, PETRI_PLACES=211, PETRI_TRANSITIONS=280} [2024-06-27 18:15:45,629 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 157 predicate places. [2024-06-27 18:15:45,629 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 280 transitions, 2973 flow [2024-06-27 18:15:45,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:45,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:45,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:45,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:15:45,630 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:45,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1568320032, now seen corresponding path program 2 times [2024-06-27 18:15:45,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:45,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955144431] [2024-06-27 18:15:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:45,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:46,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:46,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955144431] [2024-06-27 18:15:46,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955144431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:46,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:46,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:15:46,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14390689] [2024-06-27 18:15:46,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:46,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:15:46,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:15:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:15:46,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:46,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 280 transitions, 2973 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:46,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:46,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:46,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:48,076 INFO L124 PetriNetUnfolderBase]: 6449/10704 cut-off events. [2024-06-27 18:15:48,076 INFO L125 PetriNetUnfolderBase]: For 362086/362097 co-relation queries the response was YES. [2024-06-27 18:15:48,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65559 conditions, 10704 events. 6449/10704 cut-off events. For 362086/362097 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 75776 event pairs, 1879 based on Foata normal form. 8/10463 useless extension candidates. Maximal degree in co-relation 65465. Up to 8901 conditions per place. [2024-06-27 18:15:48,183 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 251 selfloop transitions, 62 changer transitions 0/323 dead transitions. [2024-06-27 18:15:48,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 323 transitions, 4125 flow [2024-06-27 18:15:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:15:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:15:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 18:15:48,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 18:15:48,184 INFO L175 Difference]: Start difference. First operand has 211 places, 280 transitions, 2973 flow. Second operand 8 states and 196 transitions. [2024-06-27 18:15:48,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 323 transitions, 4125 flow [2024-06-27 18:15:48,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 323 transitions, 4031 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 18:15:48,741 INFO L231 Difference]: Finished difference. Result has 214 places, 288 transitions, 3189 flow [2024-06-27 18:15:48,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2879, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3189, PETRI_PLACES=214, PETRI_TRANSITIONS=288} [2024-06-27 18:15:48,741 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 160 predicate places. [2024-06-27 18:15:48,741 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 288 transitions, 3189 flow [2024-06-27 18:15:48,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:48,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:48,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:48,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:15:48,742 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:48,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:48,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1568333052, now seen corresponding path program 3 times [2024-06-27 18:15:48,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:48,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823077437] [2024-06-27 18:15:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:48,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:49,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:49,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823077437] [2024-06-27 18:15:49,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823077437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:49,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:49,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:15:49,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675339178] [2024-06-27 18:15:49,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:49,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:15:49,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:49,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:15:49,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:15:49,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:49,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 288 transitions, 3189 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:49,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:49,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:49,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:51,403 INFO L124 PetriNetUnfolderBase]: 6465/10732 cut-off events. [2024-06-27 18:15:51,404 INFO L125 PetriNetUnfolderBase]: For 380532/380543 co-relation queries the response was YES. [2024-06-27 18:15:51,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67455 conditions, 10732 events. 6465/10732 cut-off events. For 380532/380543 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 76003 event pairs, 1895 based on Foata normal form. 8/10489 useless extension candidates. Maximal degree in co-relation 67359. Up to 9043 conditions per place. [2024-06-27 18:15:51,520 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 257 selfloop transitions, 58 changer transitions 0/325 dead transitions. [2024-06-27 18:15:51,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 325 transitions, 4142 flow [2024-06-27 18:15:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:15:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:15:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 18:15:51,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 18:15:51,521 INFO L175 Difference]: Start difference. First operand has 214 places, 288 transitions, 3189 flow. Second operand 8 states and 194 transitions. [2024-06-27 18:15:51,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 325 transitions, 4142 flow [2024-06-27 18:15:52,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 325 transitions, 3977 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 18:15:52,034 INFO L231 Difference]: Finished difference. Result has 218 places, 292 transitions, 3244 flow [2024-06-27 18:15:52,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3244, PETRI_PLACES=218, PETRI_TRANSITIONS=292} [2024-06-27 18:15:52,035 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 164 predicate places. [2024-06-27 18:15:52,035 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 292 transitions, 3244 flow [2024-06-27 18:15:52,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:52,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:52,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:52,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:15:52,035 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:52,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:52,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1688070483, now seen corresponding path program 3 times [2024-06-27 18:15:52,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:52,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849390223] [2024-06-27 18:15:52,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:52,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:52,631 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 18:15:52,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:52,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849390223] [2024-06-27 18:15:52,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849390223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:52,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:52,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:52,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435656502] [2024-06-27 18:15:52,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:52,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:52,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:52,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:52,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:52,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:52,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 292 transitions, 3244 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 18:15:52,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:52,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:52,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:54,381 INFO L124 PetriNetUnfolderBase]: 6458/10722 cut-off events. [2024-06-27 18:15:54,381 INFO L125 PetriNetUnfolderBase]: For 387938/387952 co-relation queries the response was YES. [2024-06-27 18:15:54,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67659 conditions, 10722 events. 6458/10722 cut-off events. For 387938/387952 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 75889 event pairs, 1910 based on Foata normal form. 4/10463 useless extension candidates. Maximal degree in co-relation 67561. Up to 9193 conditions per place. [2024-06-27 18:15:54,513 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 267 selfloop transitions, 44 changer transitions 0/321 dead transitions. [2024-06-27 18:15:54,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 321 transitions, 3974 flow [2024-06-27 18:15:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:15:54,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 18:15:54,514 INFO L175 Difference]: Start difference. First operand has 218 places, 292 transitions, 3244 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:15:54,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 321 transitions, 3974 flow [2024-06-27 18:15:55,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 321 transitions, 3783 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 18:15:55,047 INFO L231 Difference]: Finished difference. Result has 219 places, 292 transitions, 3148 flow [2024-06-27 18:15:55,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3148, PETRI_PLACES=219, PETRI_TRANSITIONS=292} [2024-06-27 18:15:55,048 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 165 predicate places. [2024-06-27 18:15:55,048 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 292 transitions, 3148 flow [2024-06-27 18:15:55,048 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 18:15:55,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:55,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:55,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:15:55,048 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:55,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash -392938865, now seen corresponding path program 4 times [2024-06-27 18:15:55,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:55,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896383962] [2024-06-27 18:15:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:55,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:55,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:55,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896383962] [2024-06-27 18:15:55,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896383962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:55,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:55,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:55,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014530386] [2024-06-27 18:15:55,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:55,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:55,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:55,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:55,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:55,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:55,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 292 transitions, 3148 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 18:15:55,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:55,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:55,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:57,291 INFO L124 PetriNetUnfolderBase]: 6475/10745 cut-off events. [2024-06-27 18:15:57,291 INFO L125 PetriNetUnfolderBase]: For 396335/396349 co-relation queries the response was YES. [2024-06-27 18:15:57,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67669 conditions, 10745 events. 6475/10745 cut-off events. For 396335/396349 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 76021 event pairs, 1896 based on Foata normal form. 4/10486 useless extension candidates. Maximal degree in co-relation 67570. Up to 9162 conditions per place. [2024-06-27 18:15:57,416 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 259 selfloop transitions, 53 changer transitions 0/322 dead transitions. [2024-06-27 18:15:57,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 322 transitions, 3932 flow [2024-06-27 18:15:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:15:57,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 18:15:57,417 INFO L175 Difference]: Start difference. First operand has 219 places, 292 transitions, 3148 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:15:57,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 322 transitions, 3932 flow [2024-06-27 18:15:57,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 322 transitions, 3738 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 18:15:57,928 INFO L231 Difference]: Finished difference. Result has 218 places, 295 transitions, 3126 flow [2024-06-27 18:15:57,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3126, PETRI_PLACES=218, PETRI_TRANSITIONS=295} [2024-06-27 18:15:57,929 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 164 predicate places. [2024-06-27 18:15:57,929 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 295 transitions, 3126 flow [2024-06-27 18:15:57,929 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 18:15:57,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:57,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:57,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:15:57,929 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:57,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:57,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1685264675, now seen corresponding path program 5 times [2024-06-27 18:15:57,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:57,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440884447] [2024-06-27 18:15:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:57,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:58,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:58,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440884447] [2024-06-27 18:15:58,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440884447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:58,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:58,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:58,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801196404] [2024-06-27 18:15:58,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:58,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:58,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:58,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:58,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:58,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:15:58,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 295 transitions, 3126 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 18:15:58,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:58,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:15:58,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:00,249 INFO L124 PetriNetUnfolderBase]: 6492/10859 cut-off events. [2024-06-27 18:16:00,250 INFO L125 PetriNetUnfolderBase]: For 406495/406518 co-relation queries the response was YES. [2024-06-27 18:16:00,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68056 conditions, 10859 events. 6492/10859 cut-off events. For 406495/406518 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 77681 event pairs, 1871 based on Foata normal form. 10/10576 useless extension candidates. Maximal degree in co-relation 67956. Up to 8983 conditions per place. [2024-06-27 18:16:00,363 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 240 selfloop transitions, 73 changer transitions 0/323 dead transitions. [2024-06-27 18:16:00,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 323 transitions, 4028 flow [2024-06-27 18:16:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:16:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:16:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:16:00,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 18:16:00,364 INFO L175 Difference]: Start difference. First operand has 218 places, 295 transitions, 3126 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:16:00,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 323 transitions, 4028 flow [2024-06-27 18:16:00,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 323 transitions, 3888 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 18:16:00,869 INFO L231 Difference]: Finished difference. Result has 220 places, 298 transitions, 3198 flow [2024-06-27 18:16:00,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3198, PETRI_PLACES=220, PETRI_TRANSITIONS=298} [2024-06-27 18:16:00,869 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 166 predicate places. [2024-06-27 18:16:00,870 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 298 transitions, 3198 flow [2024-06-27 18:16:00,870 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 18:16:00,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:00,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:00,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:16:00,870 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:00,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:00,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1223349707, now seen corresponding path program 6 times [2024-06-27 18:16:00,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:00,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950175153] [2024-06-27 18:16:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:00,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:01,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:01,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950175153] [2024-06-27 18:16:01,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950175153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:01,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:01,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:16:01,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074390392] [2024-06-27 18:16:01,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:01,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:16:01,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:01,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:16:01,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:16:01,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:16:01,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 298 transitions, 3198 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 18:16:01,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:01,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:16:01,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:03,148 INFO L124 PetriNetUnfolderBase]: 6484/10847 cut-off events. [2024-06-27 18:16:03,148 INFO L125 PetriNetUnfolderBase]: For 415203/415226 co-relation queries the response was YES. [2024-06-27 18:16:03,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68119 conditions, 10847 events. 6484/10847 cut-off events. For 415203/415226 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 77584 event pairs, 1869 based on Foata normal form. 11/10565 useless extension candidates. Maximal degree in co-relation 68018. Up to 8975 conditions per place. [2024-06-27 18:16:03,292 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 243 selfloop transitions, 69 changer transitions 0/322 dead transitions. [2024-06-27 18:16:03,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 322 transitions, 3922 flow [2024-06-27 18:16:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:16:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:16:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:16:03,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 18:16:03,293 INFO L175 Difference]: Start difference. First operand has 220 places, 298 transitions, 3198 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:16:03,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 322 transitions, 3922 flow [2024-06-27 18:16:03,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 322 transitions, 3707 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 18:16:03,975 INFO L231 Difference]: Finished difference. Result has 223 places, 298 transitions, 3129 flow [2024-06-27 18:16:03,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3129, PETRI_PLACES=223, PETRI_TRANSITIONS=298} [2024-06-27 18:16:03,976 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 169 predicate places. [2024-06-27 18:16:03,976 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 298 transitions, 3129 flow [2024-06-27 18:16:03,976 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 18:16:03,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:03,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:03,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:16:03,977 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:03,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:03,977 INFO L85 PathProgramCache]: Analyzing trace with hash -361325035, now seen corresponding path program 2 times [2024-06-27 18:16:03,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:03,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699783292] [2024-06-27 18:16:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:03,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:04,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:04,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699783292] [2024-06-27 18:16:04,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699783292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:04,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:04,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:16:04,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745027880] [2024-06-27 18:16:04,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:04,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:16:04,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:04,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:16:04,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:16:05,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:16:05,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 298 transitions, 3129 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 18:16:05,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:05,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:16:05,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:07,149 INFO L124 PetriNetUnfolderBase]: 6670/11041 cut-off events. [2024-06-27 18:16:07,150 INFO L125 PetriNetUnfolderBase]: For 439110/439124 co-relation queries the response was YES. [2024-06-27 18:16:07,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69610 conditions, 11041 events. 6670/11041 cut-off events. For 439110/439124 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 78216 event pairs, 1841 based on Foata normal form. 15/10782 useless extension candidates. Maximal degree in co-relation 69508. Up to 8733 conditions per place. [2024-06-27 18:16:07,280 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 275 selfloop transitions, 105 changer transitions 0/390 dead transitions. [2024-06-27 18:16:07,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 390 transitions, 4353 flow [2024-06-27 18:16:07,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:16:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:16:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 306 transitions. [2024-06-27 18:16:07,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 18:16:07,281 INFO L175 Difference]: Start difference. First operand has 223 places, 298 transitions, 3129 flow. Second operand 12 states and 306 transitions. [2024-06-27 18:16:07,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 390 transitions, 4353 flow [2024-06-27 18:16:07,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 390 transitions, 4188 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:16:07,982 INFO L231 Difference]: Finished difference. Result has 230 places, 303 transitions, 3266 flow [2024-06-27 18:16:07,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3266, PETRI_PLACES=230, PETRI_TRANSITIONS=303} [2024-06-27 18:16:07,983 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 176 predicate places. [2024-06-27 18:16:07,983 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 303 transitions, 3266 flow [2024-06-27 18:16:07,983 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 18:16:07,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:07,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:07,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:16:07,983 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:07,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:07,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1945771925, now seen corresponding path program 3 times [2024-06-27 18:16:07,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:07,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504670782] [2024-06-27 18:16:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:07,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:08,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:08,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504670782] [2024-06-27 18:16:08,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504670782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:08,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:08,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:16:08,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734598920] [2024-06-27 18:16:08,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:08,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:16:08,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:16:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:16:09,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:16:09,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 303 transitions, 3266 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 18:16:09,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:09,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:16:09,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:11,382 INFO L124 PetriNetUnfolderBase]: 6916/11519 cut-off events. [2024-06-27 18:16:11,382 INFO L125 PetriNetUnfolderBase]: For 460625/460639 co-relation queries the response was YES. [2024-06-27 18:16:11,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73012 conditions, 11519 events. 6916/11519 cut-off events. For 460625/460639 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 82709 event pairs, 1896 based on Foata normal form. 15/11256 useless extension candidates. Maximal degree in co-relation 72907. Up to 9106 conditions per place. [2024-06-27 18:16:11,520 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 277 selfloop transitions, 114 changer transitions 0/401 dead transitions. [2024-06-27 18:16:11,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 401 transitions, 4541 flow [2024-06-27 18:16:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:16:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:16:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 332 transitions. [2024-06-27 18:16:11,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2024-06-27 18:16:11,521 INFO L175 Difference]: Start difference. First operand has 230 places, 303 transitions, 3266 flow. Second operand 13 states and 332 transitions. [2024-06-27 18:16:11,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 401 transitions, 4541 flow [2024-06-27 18:16:12,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 401 transitions, 4305 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 18:16:12,099 INFO L231 Difference]: Finished difference. Result has 237 places, 309 transitions, 3371 flow [2024-06-27 18:16:12,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3036, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3371, PETRI_PLACES=237, PETRI_TRANSITIONS=309} [2024-06-27 18:16:12,099 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 183 predicate places. [2024-06-27 18:16:12,099 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 309 transitions, 3371 flow [2024-06-27 18:16:12,099 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 18:16:12,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:12,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:12,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:16:12,100 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:12,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:12,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1592453013, now seen corresponding path program 4 times [2024-06-27 18:16:12,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:12,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666653681] [2024-06-27 18:16:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:12,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:13,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:13,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666653681] [2024-06-27 18:16:13,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666653681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:13,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:13,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:16:13,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436175044] [2024-06-27 18:16:13,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:13,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:16:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:16:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:16:13,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:16:13,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 309 transitions, 3371 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 18:16:13,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:13,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:16:13,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:15,606 INFO L124 PetriNetUnfolderBase]: 6989/11658 cut-off events. [2024-06-27 18:16:15,606 INFO L125 PetriNetUnfolderBase]: For 457282/457296 co-relation queries the response was YES. [2024-06-27 18:16:15,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73425 conditions, 11658 events. 6989/11658 cut-off events. For 457282/457296 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 83930 event pairs, 1904 based on Foata normal form. 15/11389 useless extension candidates. Maximal degree in co-relation 73317. Up to 9221 conditions per place. [2024-06-27 18:16:15,749 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 274 selfloop transitions, 120 changer transitions 0/404 dead transitions. [2024-06-27 18:16:15,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 404 transitions, 4603 flow [2024-06-27 18:16:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:16:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:16:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 330 transitions. [2024-06-27 18:16:15,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2024-06-27 18:16:15,750 INFO L175 Difference]: Start difference. First operand has 237 places, 309 transitions, 3371 flow. Second operand 13 states and 330 transitions. [2024-06-27 18:16:15,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 404 transitions, 4603 flow [2024-06-27 18:16:16,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 404 transitions, 4341 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 18:16:16,489 INFO L231 Difference]: Finished difference. Result has 242 places, 312 transitions, 3401 flow [2024-06-27 18:16:16,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3401, PETRI_PLACES=242, PETRI_TRANSITIONS=312} [2024-06-27 18:16:16,489 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 188 predicate places. [2024-06-27 18:16:16,489 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 312 transitions, 3401 flow [2024-06-27 18:16:16,490 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 18:16:16,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:16,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:16,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:16:16,490 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:16,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:16,490 INFO L85 PathProgramCache]: Analyzing trace with hash 327730713, now seen corresponding path program 5 times [2024-06-27 18:16:16,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:16,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977019674] [2024-06-27 18:16:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:16,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:17,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977019674] [2024-06-27 18:16:17,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977019674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:17,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:17,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:16:17,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918817752] [2024-06-27 18:16:17,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:17,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:16:17,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:17,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:16:17,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:16:17,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:16:17,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 312 transitions, 3401 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 18:16:17,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:17,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:16:17,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:19,816 INFO L124 PetriNetUnfolderBase]: 6969/11446 cut-off events. [2024-06-27 18:16:19,817 INFO L125 PetriNetUnfolderBase]: For 447399/447413 co-relation queries the response was YES. [2024-06-27 18:16:19,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72325 conditions, 11446 events. 6969/11446 cut-off events. For 447399/447413 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 80692 event pairs, 1637 based on Foata normal form. 15/11226 useless extension candidates. Maximal degree in co-relation 72215. Up to 7806 conditions per place. [2024-06-27 18:16:19,948 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 254 selfloop transitions, 132 changer transitions 0/396 dead transitions. [2024-06-27 18:16:19,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 396 transitions, 4477 flow [2024-06-27 18:16:19,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:16:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:16:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 306 transitions. [2024-06-27 18:16:19,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 18:16:19,949 INFO L175 Difference]: Start difference. First operand has 242 places, 312 transitions, 3401 flow. Second operand 12 states and 306 transitions. [2024-06-27 18:16:19,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 396 transitions, 4477 flow [2024-06-27 18:16:20,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 396 transitions, 4119 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 18:16:20,760 INFO L231 Difference]: Finished difference. Result has 243 places, 311 transitions, 3241 flow [2024-06-27 18:16:20,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2973, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3241, PETRI_PLACES=243, PETRI_TRANSITIONS=311} [2024-06-27 18:16:20,760 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 189 predicate places. [2024-06-27 18:16:20,761 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 311 transitions, 3241 flow [2024-06-27 18:16:20,761 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 18:16:20,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:20,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:20,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:16:20,761 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:20,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:20,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1694292340, now seen corresponding path program 4 times [2024-06-27 18:16:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:20,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071311673] [2024-06-27 18:16:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:20,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:21,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:21,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071311673] [2024-06-27 18:16:21,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071311673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:21,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:21,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:21,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947122310] [2024-06-27 18:16:21,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:21,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:21,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:21,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:16:21,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 311 transitions, 3241 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:21,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:21,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:16:21,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:23,761 INFO L124 PetriNetUnfolderBase]: 7060/12242 cut-off events. [2024-06-27 18:16:23,762 INFO L125 PetriNetUnfolderBase]: For 450114/450137 co-relation queries the response was YES. [2024-06-27 18:16:23,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73419 conditions, 12242 events. 7060/12242 cut-off events. For 450114/450137 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 91909 event pairs, 2001 based on Foata normal form. 11/11843 useless extension candidates. Maximal degree in co-relation 73309. Up to 9502 conditions per place. [2024-06-27 18:16:23,895 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 253 selfloop transitions, 98 changer transitions 0/361 dead transitions. [2024-06-27 18:16:23,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 361 transitions, 4643 flow [2024-06-27 18:16:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:16:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:16:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 18:16:23,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 18:16:23,897 INFO L175 Difference]: Start difference. First operand has 243 places, 311 transitions, 3241 flow. Second operand 8 states and 194 transitions. [2024-06-27 18:16:23,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 361 transitions, 4643 flow [2024-06-27 18:16:24,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 361 transitions, 4300 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-27 18:16:24,514 INFO L231 Difference]: Finished difference. Result has 242 places, 328 transitions, 3424 flow [2024-06-27 18:16:24,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2898, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3424, PETRI_PLACES=242, PETRI_TRANSITIONS=328} [2024-06-27 18:16:24,515 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 188 predicate places. [2024-06-27 18:16:24,515 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 328 transitions, 3424 flow [2024-06-27 18:16:24,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:24,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:24,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:24,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:16:24,516 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:24,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:24,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1225285921, now seen corresponding path program 2 times [2024-06-27 18:16:24,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:24,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162054085] [2024-06-27 18:16:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:24,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:25,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:25,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162054085] [2024-06-27 18:16:25,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162054085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:25,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:25,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:25,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517053777] [2024-06-27 18:16:25,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:25,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:25,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:25,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:25,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:16:25,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 328 transitions, 3424 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:25,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:25,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:16:25,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:27,441 INFO L124 PetriNetUnfolderBase]: 6870/12060 cut-off events. [2024-06-27 18:16:27,441 INFO L125 PetriNetUnfolderBase]: For 477566/477614 co-relation queries the response was YES. [2024-06-27 18:16:27,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72179 conditions, 12060 events. 6870/12060 cut-off events. For 477566/477614 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 91933 event pairs, 1947 based on Foata normal form. 36/11652 useless extension candidates. Maximal degree in co-relation 72067. Up to 9580 conditions per place. [2024-06-27 18:16:27,568 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 278 selfloop transitions, 42 changer transitions 0/374 dead transitions. [2024-06-27 18:16:27,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 374 transitions, 4724 flow [2024-06-27 18:16:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:16:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:16:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 18:16:27,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130208333333334 [2024-06-27 18:16:27,569 INFO L175 Difference]: Start difference. First operand has 242 places, 328 transitions, 3424 flow. Second operand 8 states and 197 transitions. [2024-06-27 18:16:27,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 374 transitions, 4724 flow [2024-06-27 18:16:28,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 374 transitions, 4521 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-27 18:16:28,385 INFO L231 Difference]: Finished difference. Result has 247 places, 337 transitions, 3563 flow [2024-06-27 18:16:28,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3221, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3563, PETRI_PLACES=247, PETRI_TRANSITIONS=337} [2024-06-27 18:16:28,386 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 193 predicate places. [2024-06-27 18:16:28,386 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 337 transitions, 3563 flow [2024-06-27 18:16:28,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:28,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:28,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:28,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:16:28,386 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:28,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:28,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1768533899, now seen corresponding path program 3 times [2024-06-27 18:16:28,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:28,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228565494] [2024-06-27 18:16:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:28,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:29,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:29,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228565494] [2024-06-27 18:16:29,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228565494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:29,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:29,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:29,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19588688] [2024-06-27 18:16:29,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:29,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:29,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:29,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:16:29,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 337 transitions, 3563 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:29,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:29,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:16:29,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:31,501 INFO L124 PetriNetUnfolderBase]: 6860/12057 cut-off events. [2024-06-27 18:16:31,502 INFO L125 PetriNetUnfolderBase]: For 483474/483482 co-relation queries the response was YES. [2024-06-27 18:16:31,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71657 conditions, 12057 events. 6860/12057 cut-off events. For 483474/483482 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 92086 event pairs, 1981 based on Foata normal form. 7/11621 useless extension candidates. Maximal degree in co-relation 71543. Up to 9754 conditions per place. [2024-06-27 18:16:31,622 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 300 selfloop transitions, 18 changer transitions 0/372 dead transitions. [2024-06-27 18:16:31,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 372 transitions, 4428 flow [2024-06-27 18:16:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:16:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:16:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 18:16:31,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869791666666667 [2024-06-27 18:16:31,623 INFO L175 Difference]: Start difference. First operand has 247 places, 337 transitions, 3563 flow. Second operand 8 states and 187 transitions. [2024-06-27 18:16:31,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 372 transitions, 4428 flow [2024-06-27 18:16:32,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 372 transitions, 4307 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-27 18:16:32,545 INFO L231 Difference]: Finished difference. Result has 253 places, 343 transitions, 3603 flow [2024-06-27 18:16:32,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3603, PETRI_PLACES=253, PETRI_TRANSITIONS=343} [2024-06-27 18:16:32,546 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 199 predicate places. [2024-06-27 18:16:32,546 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 343 transitions, 3603 flow [2024-06-27 18:16:32,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:32,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:32,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:32,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:16:32,546 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:32,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1679560675, now seen corresponding path program 4 times [2024-06-27 18:16:32,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:32,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288524194] [2024-06-27 18:16:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:32,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:33,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:33,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288524194] [2024-06-27 18:16:33,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288524194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:33,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:33,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:33,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074995880] [2024-06-27 18:16:33,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:33,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:33,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:33,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:16:33,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 343 transitions, 3603 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:33,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:33,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:16:33,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:35,490 INFO L124 PetriNetUnfolderBase]: 6867/11681 cut-off events. [2024-06-27 18:16:35,490 INFO L125 PetriNetUnfolderBase]: For 486068/486116 co-relation queries the response was YES. [2024-06-27 18:16:35,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71328 conditions, 11681 events. 6867/11681 cut-off events. For 486068/486116 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 86630 event pairs, 1957 based on Foata normal form. 35/11364 useless extension candidates. Maximal degree in co-relation 71211. Up to 9711 conditions per place. [2024-06-27 18:16:35,647 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 298 selfloop transitions, 26 changer transitions 0/378 dead transitions. [2024-06-27 18:16:35,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 378 transitions, 4469 flow [2024-06-27 18:16:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:16:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:16:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 18:16:35,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2024-06-27 18:16:35,648 INFO L175 Difference]: Start difference. First operand has 253 places, 343 transitions, 3603 flow. Second operand 8 states and 189 transitions. [2024-06-27 18:16:35,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 378 transitions, 4469 flow [2024-06-27 18:16:36,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 378 transitions, 4372 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 18:16:36,807 INFO L231 Difference]: Finished difference. Result has 257 places, 346 transitions, 3646 flow [2024-06-27 18:16:36,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3646, PETRI_PLACES=257, PETRI_TRANSITIONS=346} [2024-06-27 18:16:36,807 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 203 predicate places. [2024-06-27 18:16:36,807 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 346 transitions, 3646 flow [2024-06-27 18:16:36,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:36,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:36,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:36,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:16:36,808 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:36,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:36,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1753296314, now seen corresponding path program 5 times [2024-06-27 18:16:36,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:36,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959477082] [2024-06-27 18:16:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:36,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:37,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:37,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959477082] [2024-06-27 18:16:37,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959477082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:37,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:37,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:37,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713067214] [2024-06-27 18:16:37,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:37,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:37,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:37,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:37,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:37,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:16:37,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 346 transitions, 3646 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:37,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:37,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:16:37,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:39,773 INFO L124 PetriNetUnfolderBase]: 7174/11983 cut-off events. [2024-06-27 18:16:39,773 INFO L125 PetriNetUnfolderBase]: For 502963/502986 co-relation queries the response was YES. [2024-06-27 18:16:39,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74514 conditions, 11983 events. 7174/11983 cut-off events. For 502963/502986 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 86847 event pairs, 2006 based on Foata normal form. 11/11685 useless extension candidates. Maximal degree in co-relation 74395. Up to 9905 conditions per place. [2024-06-27 18:16:39,916 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 297 selfloop transitions, 76 changer transitions 0/383 dead transitions. [2024-06-27 18:16:39,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 383 transitions, 4834 flow [2024-06-27 18:16:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:16:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:16:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 18:16:39,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:16:39,918 INFO L175 Difference]: Start difference. First operand has 257 places, 346 transitions, 3646 flow. Second operand 8 states and 192 transitions. [2024-06-27 18:16:39,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 383 transitions, 4834 flow [2024-06-27 18:16:40,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 383 transitions, 4720 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 18:16:40,883 INFO L231 Difference]: Finished difference. Result has 260 places, 352 transitions, 3850 flow [2024-06-27 18:16:40,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3850, PETRI_PLACES=260, PETRI_TRANSITIONS=352} [2024-06-27 18:16:40,884 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 206 predicate places. [2024-06-27 18:16:40,884 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 352 transitions, 3850 flow [2024-06-27 18:16:40,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:40,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:40,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:40,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:16:40,884 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:40,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1679547190, now seen corresponding path program 6 times [2024-06-27 18:16:40,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:40,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078990527] [2024-06-27 18:16:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:40,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:41,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078990527] [2024-06-27 18:16:41,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078990527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:41,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:41,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:41,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294458832] [2024-06-27 18:16:41,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:41,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:41,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:41,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:41,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:41,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:16:41,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 352 transitions, 3850 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:41,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:41,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:16:41,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:43,949 INFO L124 PetriNetUnfolderBase]: 7188/12013 cut-off events. [2024-06-27 18:16:43,950 INFO L125 PetriNetUnfolderBase]: For 519294/519317 co-relation queries the response was YES. [2024-06-27 18:16:44,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75568 conditions, 12013 events. 7188/12013 cut-off events. For 519294/519317 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 87212 event pairs, 2009 based on Foata normal form. 11/11711 useless extension candidates. Maximal degree in co-relation 75447. Up to 10009 conditions per place. [2024-06-27 18:16:44,077 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 300 selfloop transitions, 75 changer transitions 0/385 dead transitions. [2024-06-27 18:16:44,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 385 transitions, 4824 flow [2024-06-27 18:16:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:16:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:16:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 18:16:44,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-06-27 18:16:44,078 INFO L175 Difference]: Start difference. First operand has 260 places, 352 transitions, 3850 flow. Second operand 8 states and 190 transitions. [2024-06-27 18:16:44,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 385 transitions, 4824 flow [2024-06-27 18:16:45,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 385 transitions, 4645 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-27 18:16:45,053 INFO L231 Difference]: Finished difference. Result has 264 places, 356 transitions, 3936 flow [2024-06-27 18:16:45,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3936, PETRI_PLACES=264, PETRI_TRANSITIONS=356} [2024-06-27 18:16:45,054 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 210 predicate places. [2024-06-27 18:16:45,054 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 356 transitions, 3936 flow [2024-06-27 18:16:45,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:45,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:45,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:45,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 18:16:45,054 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:45,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:45,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1915853947, now seen corresponding path program 1 times [2024-06-27 18:16:45,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:45,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729245045] [2024-06-27 18:16:45,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:45,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:45,732 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 18:16:45,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:45,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729245045] [2024-06-27 18:16:45,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729245045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:45,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:45,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:45,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214477332] [2024-06-27 18:16:45,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:45,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:45,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:45,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:16:45,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 356 transitions, 3936 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:45,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:45,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:16:45,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:47,914 INFO L124 PetriNetUnfolderBase]: 6866/11589 cut-off events. [2024-06-27 18:16:47,914 INFO L125 PetriNetUnfolderBase]: For 527344/527385 co-relation queries the response was YES. [2024-06-27 18:16:48,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74025 conditions, 11589 events. 6866/11589 cut-off events. For 527344/527385 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 84710 event pairs, 1902 based on Foata normal form. 27/11342 useless extension candidates. Maximal degree in co-relation 73902. Up to 9818 conditions per place. [2024-06-27 18:16:48,055 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 349 selfloop transitions, 21 changer transitions 0/395 dead transitions. [2024-06-27 18:16:48,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 395 transitions, 4880 flow [2024-06-27 18:16:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:16:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:16:48,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 18:16:48,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026041666666666 [2024-06-27 18:16:48,056 INFO L175 Difference]: Start difference. First operand has 264 places, 356 transitions, 3936 flow. Second operand 8 states and 193 transitions. [2024-06-27 18:16:48,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 395 transitions, 4880 flow [2024-06-27 18:16:49,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 395 transitions, 4669 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 18:16:49,060 INFO L231 Difference]: Finished difference. Result has 267 places, 363 transitions, 3890 flow [2024-06-27 18:16:49,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3725, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3890, PETRI_PLACES=267, PETRI_TRANSITIONS=363} [2024-06-27 18:16:49,061 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 213 predicate places. [2024-06-27 18:16:49,061 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 363 transitions, 3890 flow [2024-06-27 18:16:49,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:49,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:49,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:49,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 18:16:49,062 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:49,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash -385550232, now seen corresponding path program 1 times [2024-06-27 18:16:49,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:49,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782223820] [2024-06-27 18:16:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:49,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:49,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:49,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782223820] [2024-06-27 18:16:49,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782223820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:49,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:49,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:49,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435439018] [2024-06-27 18:16:49,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:49,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:49,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:49,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:16:49,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 363 transitions, 3890 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:49,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:49,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:16:49,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:52,136 INFO L124 PetriNetUnfolderBase]: 6924/11685 cut-off events. [2024-06-27 18:16:52,136 INFO L125 PetriNetUnfolderBase]: For 556827/556868 co-relation queries the response was YES. [2024-06-27 18:16:52,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75421 conditions, 11685 events. 6924/11685 cut-off events. For 556827/556868 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 85506 event pairs, 1899 based on Foata normal form. 32/11440 useless extension candidates. Maximal degree in co-relation 75296. Up to 9854 conditions per place. [2024-06-27 18:16:52,277 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 354 selfloop transitions, 21 changer transitions 0/400 dead transitions. [2024-06-27 18:16:52,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 400 transitions, 4838 flow [2024-06-27 18:16:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:16:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:16:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 18:16:52,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 18:16:52,278 INFO L175 Difference]: Start difference. First operand has 267 places, 363 transitions, 3890 flow. Second operand 8 states and 194 transitions. [2024-06-27 18:16:52,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 400 transitions, 4838 flow [2024-06-27 18:16:53,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 400 transitions, 4737 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 18:16:53,343 INFO L231 Difference]: Finished difference. Result has 270 places, 367 transitions, 3910 flow [2024-06-27 18:16:53,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3789, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3910, PETRI_PLACES=270, PETRI_TRANSITIONS=367} [2024-06-27 18:16:53,343 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 216 predicate places. [2024-06-27 18:16:53,343 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 367 transitions, 3910 flow [2024-06-27 18:16:53,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:53,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:53,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:53,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 18:16:53,344 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:53,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:53,344 INFO L85 PathProgramCache]: Analyzing trace with hash -380879772, now seen corresponding path program 2 times [2024-06-27 18:16:53,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:53,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923999743] [2024-06-27 18:16:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:53,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:54,090 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 18:16:54,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:54,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923999743] [2024-06-27 18:16:54,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923999743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:54,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:54,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:54,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374359639] [2024-06-27 18:16:54,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:54,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:54,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:54,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:54,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:54,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:16:54,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 367 transitions, 3910 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:54,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:54,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:16:54,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:56,291 INFO L124 PetriNetUnfolderBase]: 6958/11749 cut-off events. [2024-06-27 18:16:56,291 INFO L125 PetriNetUnfolderBase]: For 570161/570202 co-relation queries the response was YES. [2024-06-27 18:16:56,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77118 conditions, 11749 events. 6958/11749 cut-off events. For 570161/570202 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 86161 event pairs, 1894 based on Foata normal form. 30/11505 useless extension candidates. Maximal degree in co-relation 76992. Up to 9891 conditions per place. [2024-06-27 18:16:56,454 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 352 selfloop transitions, 26 changer transitions 0/403 dead transitions. [2024-06-27 18:16:56,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 403 transitions, 4882 flow [2024-06-27 18:16:56,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:16:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:16:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 18:16:56,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 18:16:56,455 INFO L175 Difference]: Start difference. First operand has 270 places, 367 transitions, 3910 flow. Second operand 8 states and 194 transitions. [2024-06-27 18:16:56,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 403 transitions, 4882 flow [2024-06-27 18:16:57,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 403 transitions, 4789 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 18:16:57,532 INFO L231 Difference]: Finished difference. Result has 272 places, 371 transitions, 3952 flow [2024-06-27 18:16:57,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3817, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3952, PETRI_PLACES=272, PETRI_TRANSITIONS=371} [2024-06-27 18:16:57,532 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 218 predicate places. [2024-06-27 18:16:57,533 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 371 transitions, 3952 flow [2024-06-27 18:16:57,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:57,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:57,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:57,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 18:16:57,533 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:57,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:57,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1428779758, now seen corresponding path program 3 times [2024-06-27 18:16:57,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:57,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003760726] [2024-06-27 18:16:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:57,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:58,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:58,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003760726] [2024-06-27 18:16:58,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003760726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:58,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:58,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:58,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420462464] [2024-06-27 18:16:58,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:58,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:58,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:58,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:58,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:58,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:16:58,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 371 transitions, 3952 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:58,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:58,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:16:58,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:00,467 INFO L124 PetriNetUnfolderBase]: 6987/11800 cut-off events. [2024-06-27 18:17:00,467 INFO L125 PetriNetUnfolderBase]: For 581081/581122 co-relation queries the response was YES. [2024-06-27 18:17:00,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78394 conditions, 11800 events. 6987/11800 cut-off events. For 581081/581122 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 86552 event pairs, 1889 based on Foata normal form. 28/11550 useless extension candidates. Maximal degree in co-relation 78267. Up to 9876 conditions per place. [2024-06-27 18:17:00,631 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 350 selfloop transitions, 36 changer transitions 0/411 dead transitions. [2024-06-27 18:17:00,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 411 transitions, 4956 flow [2024-06-27 18:17:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 18:17:00,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 18:17:00,632 INFO L175 Difference]: Start difference. First operand has 272 places, 371 transitions, 3952 flow. Second operand 8 states and 194 transitions. [2024-06-27 18:17:00,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 411 transitions, 4956 flow [2024-06-27 18:17:01,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 411 transitions, 4849 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:01,949 INFO L231 Difference]: Finished difference. Result has 275 places, 380 transitions, 4049 flow [2024-06-27 18:17:01,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4049, PETRI_PLACES=275, PETRI_TRANSITIONS=380} [2024-06-27 18:17:01,950 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 221 predicate places. [2024-06-27 18:17:01,950 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 380 transitions, 4049 flow [2024-06-27 18:17:01,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:01,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:01,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:01,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 18:17:01,950 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:01,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:01,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1768213142, now seen corresponding path program 4 times [2024-06-27 18:17:01,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:01,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730139521] [2024-06-27 18:17:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:01,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:02,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:02,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730139521] [2024-06-27 18:17:02,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730139521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:02,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:02,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:02,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103124688] [2024-06-27 18:17:02,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:02,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:02,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:02,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:02,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:17:02,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 380 transitions, 4049 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:02,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:02,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:17:02,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:05,017 INFO L124 PetriNetUnfolderBase]: 7173/12453 cut-off events. [2024-06-27 18:17:05,017 INFO L125 PetriNetUnfolderBase]: For 621444/621553 co-relation queries the response was YES. [2024-06-27 18:17:05,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82157 conditions, 12453 events. 7173/12453 cut-off events. For 621444/621553 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 94108 event pairs, 1889 based on Foata normal form. 21/12073 useless extension candidates. Maximal degree in co-relation 82028. Up to 9844 conditions per place. [2024-06-27 18:17:05,198 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 331 selfloop transitions, 65 changer transitions 0/421 dead transitions. [2024-06-27 18:17:05,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 421 transitions, 5319 flow [2024-06-27 18:17:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:05,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:17:05,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-06-27 18:17:05,199 INFO L175 Difference]: Start difference. First operand has 275 places, 380 transitions, 4049 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:17:05,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 421 transitions, 5319 flow [2024-06-27 18:17:06,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 421 transitions, 5236 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 18:17:06,546 INFO L231 Difference]: Finished difference. Result has 280 places, 387 transitions, 4295 flow [2024-06-27 18:17:06,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4295, PETRI_PLACES=280, PETRI_TRANSITIONS=387} [2024-06-27 18:17:06,547 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 226 predicate places. [2024-06-27 18:17:06,547 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 387 transitions, 4295 flow [2024-06-27 18:17:06,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:06,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:06,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:06,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 18:17:06,548 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:06,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:06,548 INFO L85 PathProgramCache]: Analyzing trace with hash -207496152, now seen corresponding path program 5 times [2024-06-27 18:17:06,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:06,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656474865] [2024-06-27 18:17:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:06,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:07,395 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 18:17:07,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:07,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656474865] [2024-06-27 18:17:07,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656474865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:07,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:07,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:07,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070282775] [2024-06-27 18:17:07,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:07,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:07,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:07,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:07,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:07,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:17:07,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 387 transitions, 4295 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:07,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:07,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:17:07,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:09,696 INFO L124 PetriNetUnfolderBase]: 7195/12179 cut-off events. [2024-06-27 18:17:09,696 INFO L125 PetriNetUnfolderBase]: For 648894/648989 co-relation queries the response was YES. [2024-06-27 18:17:09,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84535 conditions, 12179 events. 7195/12179 cut-off events. For 648894/648989 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 90152 event pairs, 1881 based on Foata normal form. 26/11885 useless extension candidates. Maximal degree in co-relation 84403. Up to 10135 conditions per place. [2024-06-27 18:17:09,868 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 365 selfloop transitions, 33 changer transitions 0/423 dead transitions. [2024-06-27 18:17:09,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 423 transitions, 5369 flow [2024-06-27 18:17:09,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 18:17:09,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-27 18:17:09,869 INFO L175 Difference]: Start difference. First operand has 280 places, 387 transitions, 4295 flow. Second operand 8 states and 195 transitions. [2024-06-27 18:17:09,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 423 transitions, 5369 flow [2024-06-27 18:17:11,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 423 transitions, 5252 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 18:17:11,078 INFO L231 Difference]: Finished difference. Result has 284 places, 391 transitions, 4353 flow [2024-06-27 18:17:11,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4353, PETRI_PLACES=284, PETRI_TRANSITIONS=391} [2024-06-27 18:17:11,079 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 230 predicate places. [2024-06-27 18:17:11,079 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 391 transitions, 4353 flow [2024-06-27 18:17:11,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:11,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:11,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:11,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 18:17:11,079 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:11,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:11,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1759016372, now seen corresponding path program 6 times [2024-06-27 18:17:11,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:11,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308571222] [2024-06-27 18:17:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:11,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:11,942 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 18:17:11,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:11,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308571222] [2024-06-27 18:17:11,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308571222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:11,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:11,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:11,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565790317] [2024-06-27 18:17:11,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:11,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:11,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:11,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:11,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:12,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:17:12,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 391 transitions, 4353 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:12,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:12,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:17:12,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:14,364 INFO L124 PetriNetUnfolderBase]: 7190/12170 cut-off events. [2024-06-27 18:17:14,364 INFO L125 PetriNetUnfolderBase]: For 641582/641677 co-relation queries the response was YES. [2024-06-27 18:17:14,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84208 conditions, 12170 events. 7190/12170 cut-off events. For 641582/641677 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 90016 event pairs, 1878 based on Foata normal form. 22/11873 useless extension candidates. Maximal degree in co-relation 84074. Up to 10117 conditions per place. [2024-06-27 18:17:14,524 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 367 selfloop transitions, 39 changer transitions 0/431 dead transitions. [2024-06-27 18:17:14,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 431 transitions, 5506 flow [2024-06-27 18:17:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 18:17:14,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 18:17:14,525 INFO L175 Difference]: Start difference. First operand has 284 places, 391 transitions, 4353 flow. Second operand 8 states and 196 transitions. [2024-06-27 18:17:14,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 431 transitions, 5506 flow [2024-06-27 18:17:15,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 431 transitions, 5340 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:15,933 INFO L231 Difference]: Finished difference. Result has 287 places, 400 transitions, 4467 flow [2024-06-27 18:17:15,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4236, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4467, PETRI_PLACES=287, PETRI_TRANSITIONS=400} [2024-06-27 18:17:15,934 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 233 predicate places. [2024-06-27 18:17:15,934 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 400 transitions, 4467 flow [2024-06-27 18:17:15,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:15,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:15,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:15,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 18:17:15,935 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:15,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:15,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1694815651, now seen corresponding path program 1 times [2024-06-27 18:17:15,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:15,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385883133] [2024-06-27 18:17:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:15,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:16,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:16,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385883133] [2024-06-27 18:17:16,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385883133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:16,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:16,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:16,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611085885] [2024-06-27 18:17:16,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:16,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:16,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:16,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:16,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:17,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:17:17,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 400 transitions, 4467 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:17,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:17,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:17:17,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:19,477 INFO L124 PetriNetUnfolderBase]: 7280/12597 cut-off events. [2024-06-27 18:17:19,477 INFO L125 PetriNetUnfolderBase]: For 645527/645555 co-relation queries the response was YES. [2024-06-27 18:17:19,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84187 conditions, 12597 events. 7280/12597 cut-off events. For 645527/645555 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 95339 event pairs, 2003 based on Foata normal form. 24/12189 useless extension candidates. Maximal degree in co-relation 84051. Up to 10287 conditions per place. [2024-06-27 18:17:19,650 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 355 selfloop transitions, 19 changer transitions 0/432 dead transitions. [2024-06-27 18:17:19,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 432 transitions, 5433 flow [2024-06-27 18:17:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 18:17:19,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-06-27 18:17:19,651 INFO L175 Difference]: Start difference. First operand has 287 places, 400 transitions, 4467 flow. Second operand 8 states and 188 transitions. [2024-06-27 18:17:19,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 432 transitions, 5433 flow [2024-06-27 18:17:20,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 432 transitions, 5332 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 18:17:20,866 INFO L231 Difference]: Finished difference. Result has 291 places, 402 transitions, 4497 flow [2024-06-27 18:17:20,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4366, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4497, PETRI_PLACES=291, PETRI_TRANSITIONS=402} [2024-06-27 18:17:20,867 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 237 predicate places. [2024-06-27 18:17:20,867 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 402 transitions, 4497 flow [2024-06-27 18:17:20,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:20,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:20,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:20,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 18:17:20,867 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:20,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1235403791, now seen corresponding path program 1 times [2024-06-27 18:17:20,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:20,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887343484] [2024-06-27 18:17:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:20,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:21,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:21,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887343484] [2024-06-27 18:17:21,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887343484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:21,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:21,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:21,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126597420] [2024-06-27 18:17:21,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:21,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:21,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:21,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:17:21,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 402 transitions, 4497 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:21,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:21,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:17:21,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:24,277 INFO L124 PetriNetUnfolderBase]: 7635/12664 cut-off events. [2024-06-27 18:17:24,277 INFO L125 PetriNetUnfolderBase]: For 673314/673337 co-relation queries the response was YES. [2024-06-27 18:17:24,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87648 conditions, 12664 events. 7635/12664 cut-off events. For 673314/673337 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 91588 event pairs, 1747 based on Foata normal form. 24/12383 useless extension candidates. Maximal degree in co-relation 87510. Up to 10781 conditions per place. [2024-06-27 18:17:24,427 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 393 selfloop transitions, 47 changer transitions 0/450 dead transitions. [2024-06-27 18:17:24,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 450 transitions, 5649 flow [2024-06-27 18:17:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 18:17:24,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-27 18:17:24,437 INFO L175 Difference]: Start difference. First operand has 291 places, 402 transitions, 4497 flow. Second operand 8 states and 198 transitions. [2024-06-27 18:17:24,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 450 transitions, 5649 flow [2024-06-27 18:17:25,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 450 transitions, 5510 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 18:17:25,883 INFO L231 Difference]: Finished difference. Result has 293 places, 409 transitions, 4608 flow [2024-06-27 18:17:25,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4608, PETRI_PLACES=293, PETRI_TRANSITIONS=409} [2024-06-27 18:17:25,883 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 239 predicate places. [2024-06-27 18:17:25,883 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 409 transitions, 4608 flow [2024-06-27 18:17:25,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:25,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:25,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:25,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 18:17:25,884 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:25,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2145206953, now seen corresponding path program 2 times [2024-06-27 18:17:25,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:25,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457410088] [2024-06-27 18:17:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:25,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:26,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:26,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457410088] [2024-06-27 18:17:26,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457410088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:26,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:26,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:26,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818115944] [2024-06-27 18:17:26,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:26,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:26,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:26,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:26,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:26,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:17:26,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 409 transitions, 4608 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:26,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:26,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:17:26,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:29,274 INFO L124 PetriNetUnfolderBase]: 7691/12755 cut-off events. [2024-06-27 18:17:29,274 INFO L125 PetriNetUnfolderBase]: For 694830/694853 co-relation queries the response was YES. [2024-06-27 18:17:29,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89468 conditions, 12755 events. 7691/12755 cut-off events. For 694830/694853 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 92468 event pairs, 2095 based on Foata normal form. 24/12480 useless extension candidates. Maximal degree in co-relation 89329. Up to 10918 conditions per place. [2024-06-27 18:17:29,450 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 394 selfloop transitions, 47 changer transitions 0/451 dead transitions. [2024-06-27 18:17:29,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 451 transitions, 5744 flow [2024-06-27 18:17:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 18:17:29,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 18:17:29,451 INFO L175 Difference]: Start difference. First operand has 293 places, 409 transitions, 4608 flow. Second operand 8 states and 196 transitions. [2024-06-27 18:17:29,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 451 transitions, 5744 flow [2024-06-27 18:17:31,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 451 transitions, 5556 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 18:17:31,245 INFO L231 Difference]: Finished difference. Result has 296 places, 412 transitions, 4628 flow [2024-06-27 18:17:31,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4420, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4628, PETRI_PLACES=296, PETRI_TRANSITIONS=412} [2024-06-27 18:17:31,246 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 242 predicate places. [2024-06-27 18:17:31,246 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 412 transitions, 4628 flow [2024-06-27 18:17:31,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:31,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:31,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:31,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 18:17:31,246 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:31,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1831148867, now seen corresponding path program 1 times [2024-06-27 18:17:31,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:31,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853761702] [2024-06-27 18:17:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:31,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:32,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:32,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853761702] [2024-06-27 18:17:32,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853761702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:32,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:32,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:32,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363452138] [2024-06-27 18:17:32,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:32,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:32,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:32,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:32,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:32,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:17:32,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 412 transitions, 4628 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:32,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:32,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:17:32,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:34,652 INFO L124 PetriNetUnfolderBase]: 7725/12811 cut-off events. [2024-06-27 18:17:34,652 INFO L125 PetriNetUnfolderBase]: For 701519/701542 co-relation queries the response was YES. [2024-06-27 18:17:34,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90000 conditions, 12811 events. 7725/12811 cut-off events. For 701519/701542 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 92801 event pairs, 2095 based on Foata normal form. 22/12531 useless extension candidates. Maximal degree in co-relation 89860. Up to 10964 conditions per place. [2024-06-27 18:17:34,845 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 397 selfloop transitions, 52 changer transitions 0/459 dead transitions. [2024-06-27 18:17:34,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 459 transitions, 5812 flow [2024-06-27 18:17:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 18:17:34,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-27 18:17:34,846 INFO L175 Difference]: Start difference. First operand has 296 places, 412 transitions, 4628 flow. Second operand 9 states and 218 transitions. [2024-06-27 18:17:34,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 459 transitions, 5812 flow [2024-06-27 18:17:36,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 459 transitions, 5626 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:36,684 INFO L231 Difference]: Finished difference. Result has 299 places, 416 transitions, 4669 flow [2024-06-27 18:17:36,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4669, PETRI_PLACES=299, PETRI_TRANSITIONS=416} [2024-06-27 18:17:36,685 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 245 predicate places. [2024-06-27 18:17:36,685 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 416 transitions, 4669 flow [2024-06-27 18:17:36,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:36,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:36,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:36,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 18:17:36,685 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:36,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:36,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2027146801, now seen corresponding path program 1 times [2024-06-27 18:17:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:36,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907148276] [2024-06-27 18:17:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:36,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:37,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:37,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907148276] [2024-06-27 18:17:37,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907148276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:37,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:37,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:37,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705029222] [2024-06-27 18:17:37,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:37,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:37,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:37,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:17:37,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 416 transitions, 4669 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:37,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:37,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:17:37,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:39,889 INFO L124 PetriNetUnfolderBase]: 7793/12939 cut-off events. [2024-06-27 18:17:39,889 INFO L125 PetriNetUnfolderBase]: For 725030/725041 co-relation queries the response was YES. [2024-06-27 18:17:40,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91560 conditions, 12939 events. 7793/12939 cut-off events. For 725030/725041 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 94072 event pairs, 2075 based on Foata normal form. 6/12634 useless extension candidates. Maximal degree in co-relation 91419. Up to 10933 conditions per place. [2024-06-27 18:17:40,089 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 406 selfloop transitions, 65 changer transitions 0/481 dead transitions. [2024-06-27 18:17:40,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 481 transitions, 6085 flow [2024-06-27 18:17:40,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:40,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 18:17:40,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-27 18:17:40,090 INFO L175 Difference]: Start difference. First operand has 299 places, 416 transitions, 4669 flow. Second operand 8 states and 198 transitions. [2024-06-27 18:17:40,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 481 transitions, 6085 flow [2024-06-27 18:17:41,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 481 transitions, 5886 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 18:17:41,465 INFO L231 Difference]: Finished difference. Result has 302 places, 442 transitions, 5011 flow [2024-06-27 18:17:41,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4470, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5011, PETRI_PLACES=302, PETRI_TRANSITIONS=442} [2024-06-27 18:17:41,465 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 248 predicate places. [2024-06-27 18:17:41,466 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 442 transitions, 5011 flow [2024-06-27 18:17:41,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:41,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:41,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:41,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 18:17:41,467 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:41,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:41,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2026996141, now seen corresponding path program 2 times [2024-06-27 18:17:41,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:41,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69347391] [2024-06-27 18:17:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:41,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:42,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:42,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69347391] [2024-06-27 18:17:42,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69347391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:42,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:42,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:42,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314600278] [2024-06-27 18:17:42,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:42,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:42,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:42,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:17:42,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 442 transitions, 5011 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:42,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:42,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:17:42,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:44,896 INFO L124 PetriNetUnfolderBase]: 7861/13029 cut-off events. [2024-06-27 18:17:44,897 INFO L125 PetriNetUnfolderBase]: For 763465/763476 co-relation queries the response was YES. [2024-06-27 18:17:45,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95386 conditions, 13029 events. 7861/13029 cut-off events. For 763465/763476 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 94606 event pairs, 2060 based on Foata normal form. 6/12724 useless extension candidates. Maximal degree in co-relation 95242. Up to 10947 conditions per place. [2024-06-27 18:17:45,060 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 405 selfloop transitions, 70 changer transitions 0/485 dead transitions. [2024-06-27 18:17:45,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 485 transitions, 6281 flow [2024-06-27 18:17:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:17:45,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-06-27 18:17:45,061 INFO L175 Difference]: Start difference. First operand has 302 places, 442 transitions, 5011 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:17:45,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 485 transitions, 6281 flow [2024-06-27 18:17:46,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 485 transitions, 6078 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-27 18:17:46,675 INFO L231 Difference]: Finished difference. Result has 306 places, 446 transitions, 5073 flow [2024-06-27 18:17:46,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4808, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5073, PETRI_PLACES=306, PETRI_TRANSITIONS=446} [2024-06-27 18:17:46,676 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 252 predicate places. [2024-06-27 18:17:46,676 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 446 transitions, 5073 flow [2024-06-27 18:17:46,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:46,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:46,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:46,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 18:17:46,676 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:46,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:46,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1824277633, now seen corresponding path program 1 times [2024-06-27 18:17:46,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:46,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909057411] [2024-06-27 18:17:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:46,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:47,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:47,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909057411] [2024-06-27 18:17:47,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909057411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:47,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:47,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:47,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209438095] [2024-06-27 18:17:47,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:47,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:47,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:17:47,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 446 transitions, 5073 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:47,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:47,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:17:47,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:49,977 INFO L124 PetriNetUnfolderBase]: 7895/13094 cut-off events. [2024-06-27 18:17:49,977 INFO L125 PetriNetUnfolderBase]: For 781171/781182 co-relation queries the response was YES. [2024-06-27 18:17:50,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96755 conditions, 13094 events. 7895/13094 cut-off events. For 781171/781182 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 95255 event pairs, 2073 based on Foata normal form. 8/12788 useless extension candidates. Maximal degree in co-relation 96610. Up to 11208 conditions per place. [2024-06-27 18:17:50,166 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 427 selfloop transitions, 48 changer transitions 0/485 dead transitions. [2024-06-27 18:17:50,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 485 transitions, 6251 flow [2024-06-27 18:17:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 18:17:50,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026041666666666 [2024-06-27 18:17:50,167 INFO L175 Difference]: Start difference. First operand has 306 places, 446 transitions, 5073 flow. Second operand 8 states and 193 transitions. [2024-06-27 18:17:50,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 485 transitions, 6251 flow [2024-06-27 18:17:52,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 485 transitions, 6020 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:52,164 INFO L231 Difference]: Finished difference. Result has 308 places, 450 transitions, 5035 flow [2024-06-27 18:17:52,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4842, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5035, PETRI_PLACES=308, PETRI_TRANSITIONS=450} [2024-06-27 18:17:52,165 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 254 predicate places. [2024-06-27 18:17:52,165 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 450 transitions, 5035 flow [2024-06-27 18:17:52,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:52,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:52,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:52,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 18:17:52,166 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:52,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:52,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1819420141, now seen corresponding path program 3 times [2024-06-27 18:17:52,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:52,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832514809] [2024-06-27 18:17:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:52,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:52,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:52,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832514809] [2024-06-27 18:17:52,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832514809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:52,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:52,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:52,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532500389] [2024-06-27 18:17:52,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:52,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:52,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:52,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:17:52,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 450 transitions, 5035 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:52,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:52,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:17:52,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:55,615 INFO L124 PetriNetUnfolderBase]: 8043/13330 cut-off events. [2024-06-27 18:17:55,615 INFO L125 PetriNetUnfolderBase]: For 821483/821494 co-relation queries the response was YES. [2024-06-27 18:17:55,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99033 conditions, 13330 events. 8043/13330 cut-off events. For 821483/821494 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 97159 event pairs, 2074 based on Foata normal form. 6/13017 useless extension candidates. Maximal degree in co-relation 98887. Up to 10905 conditions per place. [2024-06-27 18:17:55,808 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 406 selfloop transitions, 79 changer transitions 0/495 dead transitions. [2024-06-27 18:17:55,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 495 transitions, 6621 flow [2024-06-27 18:17:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 18:17:55,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-27 18:17:55,809 INFO L175 Difference]: Start difference. First operand has 308 places, 450 transitions, 5035 flow. Second operand 8 states and 198 transitions. [2024-06-27 18:17:55,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 495 transitions, 6621 flow [2024-06-27 18:17:57,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 495 transitions, 6478 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:57,915 INFO L231 Difference]: Finished difference. Result has 310 places, 457 transitions, 5259 flow [2024-06-27 18:17:57,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4892, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5259, PETRI_PLACES=310, PETRI_TRANSITIONS=457} [2024-06-27 18:17:57,915 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 256 predicate places. [2024-06-27 18:17:57,915 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 457 transitions, 5259 flow [2024-06-27 18:17:57,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:57,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:57,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:57,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 18:17:57,916 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:57,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2004058393, now seen corresponding path program 2 times [2024-06-27 18:17:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:57,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809527291] [2024-06-27 18:17:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:58,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:58,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809527291] [2024-06-27 18:17:58,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809527291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:58,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:58,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:58,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117175719] [2024-06-27 18:17:58,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:58,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:58,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:58,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:58,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:58,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:17:58,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 457 transitions, 5259 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:58,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:58,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:17:58,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:01,770 INFO L124 PetriNetUnfolderBase]: 8077/13363 cut-off events. [2024-06-27 18:18:01,771 INFO L125 PetriNetUnfolderBase]: For 846009/846020 co-relation queries the response was YES. [2024-06-27 18:18:01,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101123 conditions, 13363 events. 8077/13363 cut-off events. For 846009/846020 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 97216 event pairs, 2078 based on Foata normal form. 8/13054 useless extension candidates. Maximal degree in co-relation 100976. Up to 11340 conditions per place. [2024-06-27 18:18:01,962 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 426 selfloop transitions, 57 changer transitions 0/493 dead transitions. [2024-06-27 18:18:01,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 493 transitions, 6463 flow [2024-06-27 18:18:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:18:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:18:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 18:18:01,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:18:01,963 INFO L175 Difference]: Start difference. First operand has 310 places, 457 transitions, 5259 flow. Second operand 8 states and 192 transitions. [2024-06-27 18:18:01,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 493 transitions, 6463 flow [2024-06-27 18:18:03,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 493 transitions, 6291 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 18:18:03,786 INFO L231 Difference]: Finished difference. Result has 314 places, 461 transitions, 5306 flow [2024-06-27 18:18:03,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5087, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5306, PETRI_PLACES=314, PETRI_TRANSITIONS=461} [2024-06-27 18:18:03,787 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 260 predicate places. [2024-06-27 18:18:03,787 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 461 transitions, 5306 flow [2024-06-27 18:18:03,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:03,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:03,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:03,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 18:18:03,787 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:03,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:03,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1373275581, now seen corresponding path program 3 times [2024-06-27 18:18:03,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:03,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338259267] [2024-06-27 18:18:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:03,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:04,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:04,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338259267] [2024-06-27 18:18:04,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338259267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:04,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:04,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:18:04,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944757311] [2024-06-27 18:18:04,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:04,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:18:04,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:18:04,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:18:04,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:18:04,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 461 transitions, 5306 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:04,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:04,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:18:04,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:07,468 INFO L124 PetriNetUnfolderBase]: 8091/13368 cut-off events. [2024-06-27 18:18:07,468 INFO L125 PetriNetUnfolderBase]: For 850699/850710 co-relation queries the response was YES. [2024-06-27 18:18:07,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101052 conditions, 13368 events. 8091/13368 cut-off events. For 850699/850710 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 97074 event pairs, 2064 based on Foata normal form. 8/13063 useless extension candidates. Maximal degree in co-relation 100903. Up to 11195 conditions per place. [2024-06-27 18:18:07,692 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 412 selfloop transitions, 75 changer transitions 0/497 dead transitions. [2024-06-27 18:18:07,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 497 transitions, 6680 flow [2024-06-27 18:18:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:18:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:18:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 18:18:07,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 18:18:07,694 INFO L175 Difference]: Start difference. First operand has 314 places, 461 transitions, 5306 flow. Second operand 8 states and 194 transitions. [2024-06-27 18:18:07,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 497 transitions, 6680 flow [2024-06-27 18:18:09,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 497 transitions, 6511 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 18:18:09,942 INFO L231 Difference]: Finished difference. Result has 316 places, 464 transitions, 5379 flow [2024-06-27 18:18:09,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5137, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5379, PETRI_PLACES=316, PETRI_TRANSITIONS=464} [2024-06-27 18:18:09,943 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 262 predicate places. [2024-06-27 18:18:09,943 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 464 transitions, 5379 flow [2024-06-27 18:18:09,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:09,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:09,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:09,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 18:18:09,944 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:09,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:09,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1373695631, now seen corresponding path program 3 times [2024-06-27 18:18:09,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:09,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923286146] [2024-06-27 18:18:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:09,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:10,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:10,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923286146] [2024-06-27 18:18:10,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923286146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:10,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:10,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:18:10,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456603604] [2024-06-27 18:18:10,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:10,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:18:10,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:18:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:18:10,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:18:10,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 464 transitions, 5379 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:10,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:10,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:18:10,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:14,243 INFO L124 PetriNetUnfolderBase]: 8147/13486 cut-off events. [2024-06-27 18:18:14,243 INFO L125 PetriNetUnfolderBase]: For 880227/880238 co-relation queries the response was YES. [2024-06-27 18:18:14,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102291 conditions, 13486 events. 8147/13486 cut-off events. For 880227/880238 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 98350 event pairs, 2078 based on Foata normal form. 10/13174 useless extension candidates. Maximal degree in co-relation 102141. Up to 11417 conditions per place. [2024-06-27 18:18:14,424 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 433 selfloop transitions, 57 changer transitions 0/500 dead transitions. [2024-06-27 18:18:14,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 500 transitions, 6627 flow [2024-06-27 18:18:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:18:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:18:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 18:18:14,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:18:14,426 INFO L175 Difference]: Start difference. First operand has 316 places, 464 transitions, 5379 flow. Second operand 8 states and 192 transitions. [2024-06-27 18:18:14,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 500 transitions, 6627 flow [2024-06-27 18:18:16,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 500 transitions, 6446 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 18:18:16,583 INFO L231 Difference]: Finished difference. Result has 319 places, 467 transitions, 5442 flow [2024-06-27 18:18:16,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5198, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5442, PETRI_PLACES=319, PETRI_TRANSITIONS=467} [2024-06-27 18:18:16,584 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 265 predicate places. [2024-06-27 18:18:16,584 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 467 transitions, 5442 flow [2024-06-27 18:18:16,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:16,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:16,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:16,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 18:18:16,584 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:16,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1373264669, now seen corresponding path program 1 times [2024-06-27 18:18:16,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:16,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126133805] [2024-06-27 18:18:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:16,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:17,419 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 18:18:17,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:17,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126133805] [2024-06-27 18:18:17,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126133805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:17,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:17,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:18:17,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705099964] [2024-06-27 18:18:17,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:17,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:18:17,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:17,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:18:17,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:18:17,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:18:17,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 467 transitions, 5442 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:17,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:17,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:18:17,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:20,561 INFO L124 PetriNetUnfolderBase]: 7895/13136 cut-off events. [2024-06-27 18:18:20,561 INFO L125 PetriNetUnfolderBase]: For 885201/885287 co-relation queries the response was YES. [2024-06-27 18:18:20,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100255 conditions, 13136 events. 7895/13136 cut-off events. For 885201/885287 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 96452 event pairs, 2024 based on Foata normal form. 59/12840 useless extension candidates. Maximal degree in co-relation 100104. Up to 11010 conditions per place. [2024-06-27 18:18:20,744 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 416 selfloop transitions, 23 changer transitions 0/505 dead transitions. [2024-06-27 18:18:20,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 505 transitions, 6570 flow [2024-06-27 18:18:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:18:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:18:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 18:18:20,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026041666666666 [2024-06-27 18:18:20,745 INFO L175 Difference]: Start difference. First operand has 319 places, 467 transitions, 5442 flow. Second operand 8 states and 193 transitions. [2024-06-27 18:18:20,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 505 transitions, 6570 flow [2024-06-27 18:18:22,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 505 transitions, 6348 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 18:18:22,875 INFO L231 Difference]: Finished difference. Result has 321 places, 470 transitions, 5364 flow [2024-06-27 18:18:22,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5364, PETRI_PLACES=321, PETRI_TRANSITIONS=470} [2024-06-27 18:18:22,876 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 267 predicate places. [2024-06-27 18:18:22,876 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 470 transitions, 5364 flow [2024-06-27 18:18:22,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:22,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:22,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:22,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 18:18:22,877 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:22,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:22,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1819112807, now seen corresponding path program 2 times [2024-06-27 18:18:22,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:22,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046564376] [2024-06-27 18:18:22,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:22,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:23,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:23,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046564376] [2024-06-27 18:18:23,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046564376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:23,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:23,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:23,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335294044] [2024-06-27 18:18:23,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:23,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:23,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:23,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:23,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:23,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:18:23,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 470 transitions, 5364 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:23,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:23,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:18:23,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:26,970 INFO L124 PetriNetUnfolderBase]: 8260/13658 cut-off events. [2024-06-27 18:18:26,971 INFO L125 PetriNetUnfolderBase]: For 919540/919551 co-relation queries the response was YES. [2024-06-27 18:18:27,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103906 conditions, 13658 events. 8260/13658 cut-off events. For 919540/919551 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 99619 event pairs, 2063 based on Foata normal form. 8/13338 useless extension candidates. Maximal degree in co-relation 103754. Up to 11261 conditions per place. [2024-06-27 18:18:27,172 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 425 selfloop transitions, 83 changer transitions 0/518 dead transitions. [2024-06-27 18:18:27,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 518 transitions, 7212 flow [2024-06-27 18:18:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:27,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 18:18:27,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-27 18:18:27,173 INFO L175 Difference]: Start difference. First operand has 321 places, 470 transitions, 5364 flow. Second operand 9 states and 218 transitions. [2024-06-27 18:18:27,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 518 transitions, 7212 flow [2024-06-27 18:18:29,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 518 transitions, 7104 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 18:18:29,714 INFO L231 Difference]: Finished difference. Result has 325 places, 478 transitions, 5698 flow [2024-06-27 18:18:29,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5256, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5698, PETRI_PLACES=325, PETRI_TRANSITIONS=478} [2024-06-27 18:18:29,714 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 271 predicate places. [2024-06-27 18:18:29,714 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 478 transitions, 5698 flow [2024-06-27 18:18:29,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:29,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:29,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:29,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 18:18:29,715 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:29,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:29,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1819530377, now seen corresponding path program 3 times [2024-06-27 18:18:29,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:29,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087739733] [2024-06-27 18:18:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:29,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:30,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:30,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087739733] [2024-06-27 18:18:30,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087739733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:30,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:30,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:30,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081309556] [2024-06-27 18:18:30,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:30,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:30,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:30,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:30,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:30,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:18:30,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 478 transitions, 5698 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:30,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:30,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:18:30,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:33,861 INFO L124 PetriNetUnfolderBase]: 8328/13758 cut-off events. [2024-06-27 18:18:33,862 INFO L125 PetriNetUnfolderBase]: For 964790/964801 co-relation queries the response was YES. [2024-06-27 18:18:34,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107012 conditions, 13758 events. 8328/13758 cut-off events. For 964790/964801 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 100423 event pairs, 2093 based on Foata normal form. 10/13441 useless extension candidates. Maximal degree in co-relation 106858. Up to 11640 conditions per place. [2024-06-27 18:18:34,246 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 448 selfloop transitions, 64 changer transitions 0/522 dead transitions. [2024-06-27 18:18:34,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 522 transitions, 7111 flow [2024-06-27 18:18:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 18:18:34,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-27 18:18:34,248 INFO L175 Difference]: Start difference. First operand has 325 places, 478 transitions, 5698 flow. Second operand 9 states and 215 transitions. [2024-06-27 18:18:34,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 522 transitions, 7111 flow [2024-06-27 18:18:36,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 522 transitions, 6841 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-27 18:18:36,679 INFO L231 Difference]: Finished difference. Result has 329 places, 484 transitions, 5773 flow [2024-06-27 18:18:36,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5454, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5773, PETRI_PLACES=329, PETRI_TRANSITIONS=484} [2024-06-27 18:18:36,680 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 275 predicate places. [2024-06-27 18:18:36,680 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 484 transitions, 5773 flow [2024-06-27 18:18:36,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:36,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:36,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:36,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 18:18:36,680 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:36,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:36,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1373279115, now seen corresponding path program 4 times [2024-06-27 18:18:36,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:36,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824450698] [2024-06-27 18:18:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:36,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:37,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:37,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824450698] [2024-06-27 18:18:37,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824450698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:37,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:37,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207697969] [2024-06-27 18:18:37,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:37,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:37,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:18:37,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 484 transitions, 5773 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:37,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:37,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:18:37,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:40,987 INFO L124 PetriNetUnfolderBase]: 8480/13997 cut-off events. [2024-06-27 18:18:40,988 INFO L125 PetriNetUnfolderBase]: For 1018555/1018566 co-relation queries the response was YES. [2024-06-27 18:18:41,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110788 conditions, 13997 events. 8480/13997 cut-off events. For 1018555/1018566 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 102477 event pairs, 2075 based on Foata normal form. 10/13668 useless extension candidates. Maximal degree in co-relation 110632. Up to 11370 conditions per place. [2024-06-27 18:18:41,219 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 430 selfloop transitions, 99 changer transitions 0/539 dead transitions. [2024-06-27 18:18:41,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 539 transitions, 7892 flow [2024-06-27 18:18:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 18:18:41,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-27 18:18:41,220 INFO L175 Difference]: Start difference. First operand has 329 places, 484 transitions, 5773 flow. Second operand 9 states and 222 transitions. [2024-06-27 18:18:41,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 539 transitions, 7892 flow [2024-06-27 18:18:44,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 539 transitions, 7635 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-27 18:18:44,631 INFO L231 Difference]: Finished difference. Result has 333 places, 498 transitions, 6242 flow [2024-06-27 18:18:44,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6242, PETRI_PLACES=333, PETRI_TRANSITIONS=498} [2024-06-27 18:18:44,631 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 279 predicate places. [2024-06-27 18:18:44,631 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 498 transitions, 6242 flow [2024-06-27 18:18:44,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:44,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:44,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:44,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 18:18:44,632 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:44,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash 361774607, now seen corresponding path program 4 times [2024-06-27 18:18:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:44,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488085778] [2024-06-27 18:18:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:44,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:45,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:45,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488085778] [2024-06-27 18:18:45,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488085778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:45,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:45,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:18:45,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884365406] [2024-06-27 18:18:45,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:45,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:18:45,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:45,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:18:45,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:18:45,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:18:45,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 498 transitions, 6242 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:45,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:45,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:18:45,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:48,838 INFO L124 PetriNetUnfolderBase]: 8514/14021 cut-off events. [2024-06-27 18:18:48,838 INFO L125 PetriNetUnfolderBase]: For 1050301/1050315 co-relation queries the response was YES. [2024-06-27 18:18:48,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113136 conditions, 14021 events. 8514/14021 cut-off events. For 1050301/1050315 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 102432 event pairs, 2179 based on Foata normal form. 5/13676 useless extension candidates. Maximal degree in co-relation 112977. Up to 11933 conditions per place. [2024-06-27 18:18:49,063 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 464 selfloop transitions, 68 changer transitions 0/542 dead transitions. [2024-06-27 18:18:49,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 542 transitions, 7614 flow [2024-06-27 18:18:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:18:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:18:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 18:18:49,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-27 18:18:49,064 INFO L175 Difference]: Start difference. First operand has 333 places, 498 transitions, 6242 flow. Second operand 8 states and 195 transitions. [2024-06-27 18:18:49,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 542 transitions, 7614 flow [2024-06-27 18:18:52,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 542 transitions, 7351 flow, removed 101 selfloop flow, removed 4 redundant places. [2024-06-27 18:18:52,338 INFO L231 Difference]: Finished difference. Result has 339 places, 505 transitions, 6297 flow [2024-06-27 18:18:52,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5979, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6297, PETRI_PLACES=339, PETRI_TRANSITIONS=505} [2024-06-27 18:18:52,338 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 285 predicate places. [2024-06-27 18:18:52,339 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 505 transitions, 6297 flow [2024-06-27 18:18:52,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:52,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:52,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:52,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 18:18:52,339 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:52,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:52,339 INFO L85 PathProgramCache]: Analyzing trace with hash 593799469, now seen corresponding path program 5 times [2024-06-27 18:18:52,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:52,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333102571] [2024-06-27 18:18:52,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:52,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:53,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:53,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333102571] [2024-06-27 18:18:53,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333102571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:53,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:53,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:18:53,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140455035] [2024-06-27 18:18:53,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:53,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:18:53,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:53,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:18:53,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:18:53,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:18:53,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 505 transitions, 6297 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:53,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:53,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:18:53,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand