./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix010.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix010.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/mix010.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix010.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 18:16:36,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:16:36,288 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:16:36,307 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:16:36,308 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:16:36,358 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:16:36,359 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:16:36,359 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:16:36,359 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:16:36,364 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:16:36,364 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:16:36,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:16:36,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:16:36,366 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:16:36,366 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:16:36,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:16:36,366 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:16:36,366 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:16:36,367 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:16:36,367 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:16:36,367 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:16:36,367 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:16:36,367 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:16:36,368 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:16:36,368 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:16:36,368 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:16:36,368 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:16:36,368 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:16:36,369 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:16:36,369 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:16:36,370 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:16:36,370 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:16:36,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:16:36,370 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:16:36,370 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:16:36,370 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:16:36,370 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:16:36,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:16:36,371 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:16:36,371 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:16:36,371 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:16:36,371 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:16:36,371 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:16:36,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:16:36,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:16:36,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:16:36,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:16:36,579 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:16:36,579 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:16:36,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-06-27 18:16:37,733 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:16:37,981 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:16:37,981 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-06-27 18:16:37,998 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ad44652/30fdaac5d3804cd791707ce3a04dd636/FLAG024a10082 [2024-06-27 18:16:38,010 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ad44652/30fdaac5d3804cd791707ce3a04dd636 [2024-06-27 18:16:38,012 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:16:38,012 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:16:38,013 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix010.opt.yml/witness.yml [2024-06-27 18:16:38,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:16:38,176 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:16:38,178 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:16:38,178 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:16:38,181 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:16:38,182 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:16:38" (1/2) ... [2024-06-27 18:16:38,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f41f80d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:16:38, skipping insertion in model container [2024-06-27 18:16:38,182 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:16:38" (1/2) ... [2024-06-27 18:16:38,184 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5cfdf682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:16:38, skipping insertion in model container [2024-06-27 18:16:38,184 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:16:38" (2/2) ... [2024-06-27 18:16:38,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f41f80d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38, skipping insertion in model container [2024-06-27 18:16:38,185 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:16:38" (2/2) ... [2024-06-27 18:16:38,185 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:16:38,260 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:16:38,261 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 18:16:38,262 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 18:16:38,262 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 18:16:38,262 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:16:38,262 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 18:16:38,297 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:16:38,499 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/mix010.opt.i[944,957] [2024-06-27 18:16:38,664 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:16:38,677 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:16:38,705 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/mix010.opt.i[944,957] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:16:38,766 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:16:38,794 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:16:38,794 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38 WrapperNode [2024-06-27 18:16:38,794 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:16:38,795 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:16:38,795 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:16:38,796 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:16:38,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,832 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,857 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 147 [2024-06-27 18:16:38,857 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:16:38,858 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:16:38,858 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:16:38,858 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:16:38,867 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,871 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,884 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 18:16:38,885 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,893 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,895 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,897 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:16:38,900 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:16:38,901 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:16:38,901 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:16:38,901 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (1/1) ... [2024-06-27 18:16:38,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:16:38,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:16:38,923 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 18:16:38,946 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 18:16:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:16:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:16:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:16:38,973 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:16:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:16:38,974 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:16:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:16:38,974 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:16:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:16:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:16:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:16:38,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:16:38,976 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 18:16:39,094 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:16:39,095 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:16:39,425 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:16:39,425 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:16:39,581 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:16:39,581 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:16:39,582 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:16:39 BoogieIcfgContainer [2024-06-27 18:16:39,582 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:16:39,584 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:16:39,584 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:16:39,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:16:39,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:16:38" (1/4) ... [2024-06-27 18:16:39,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461a05d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:16:39, skipping insertion in model container [2024-06-27 18:16:39,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:16:38" (2/4) ... [2024-06-27 18:16:39,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461a05d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:16:39, skipping insertion in model container [2024-06-27 18:16:39,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:16:38" (3/4) ... [2024-06-27 18:16:39,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461a05d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:16:39, skipping insertion in model container [2024-06-27 18:16:39,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:16:39" (4/4) ... [2024-06-27 18:16:39,591 INFO L112 eAbstractionObserver]: Analyzing ICFG mix010.opt.i [2024-06-27 18:16:39,605 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:16:39,624 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 18:16:39,624 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:16:39,661 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:16:39,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 110 flow [2024-06-27 18:16:39,713 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2024-06-27 18:16:39,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:16:39,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 46 events. 1/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-06-27 18:16:39,718 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 110 flow [2024-06-27 18:16:39,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 46 transitions, 101 flow [2024-06-27 18:16:39,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:16:39,740 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;@7f696454, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:16:39,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 18:16:39,744 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:16:39,744 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:16:39,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:16:39,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:39,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:16:39,745 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 18:16:39,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:39,753 INFO L85 PathProgramCache]: Analyzing trace with hash 362658526, now seen corresponding path program 1 times [2024-06-27 18:16:39,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:39,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088304642] [2024-06-27 18:16:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:39,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:40,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:40,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088304642] [2024-06-27 18:16:40,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088304642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:40,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:40,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:16:40,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656117096] [2024-06-27 18:16:40,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:40,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:16:40,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:40,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:16:40,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:16:40,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 18:16:40,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:40,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:40,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 18:16:40,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:41,492 INFO L124 PetriNetUnfolderBase]: 2860/4838 cut-off events. [2024-06-27 18:16:41,493 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-27 18:16:41,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9047 conditions, 4838 events. 2860/4838 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 32254 event pairs, 2250 based on Foata normal form. 145/4587 useless extension candidates. Maximal degree in co-relation 9035. Up to 4134 conditions per place. [2024-06-27 18:16:41,519 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 40 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-27 18:16:41,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 225 flow [2024-06-27 18:16:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:16:41,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:16:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-27 18:16:41,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074829931972789 [2024-06-27 18:16:41,530 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 101 flow. Second operand 3 states and 104 transitions. [2024-06-27 18:16:41,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 225 flow [2024-06-27 18:16:41,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 220 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:16:41,534 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 133 flow [2024-06-27 18:16:41,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-27 18:16:41,538 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-06-27 18:16:41,539 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 133 flow [2024-06-27 18:16:41,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:41,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:41,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:41,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:16:41,539 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 18:16:41,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:41,540 INFO L85 PathProgramCache]: Analyzing trace with hash 623805891, now seen corresponding path program 1 times [2024-06-27 18:16:41,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:41,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632417424] [2024-06-27 18:16:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:41,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:42,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:42,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632417424] [2024-06-27 18:16:42,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632417424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:42,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:42,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:16:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958443102] [2024-06-27 18:16:42,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:42,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:16:42,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:42,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:16:42,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:16:42,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 18:16:42,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:42,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:42,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 18:16:42,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:42,731 INFO L124 PetriNetUnfolderBase]: 3263/5458 cut-off events. [2024-06-27 18:16:42,731 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2024-06-27 18:16:42,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11411 conditions, 5458 events. 3263/5458 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 36376 event pairs, 2166 based on Foata normal form. 3/5097 useless extension candidates. Maximal degree in co-relation 11399. Up to 4679 conditions per place. [2024-06-27 18:16:42,797 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 52 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-06-27 18:16:42,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 321 flow [2024-06-27 18:16:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:16:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:16:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-27 18:16:42,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-06-27 18:16:42,802 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 133 flow. Second operand 4 states and 132 transitions. [2024-06-27 18:16:42,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 321 flow [2024-06-27 18:16:42,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 75 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:16:42,806 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 179 flow [2024-06-27 18:16:42,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-27 18:16:42,807 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2024-06-27 18:16:42,807 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 179 flow [2024-06-27 18:16:42,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:42,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:42,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:42,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:16:42,810 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 18:16:42,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:42,814 INFO L85 PathProgramCache]: Analyzing trace with hash -521631922, now seen corresponding path program 1 times [2024-06-27 18:16:42,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:42,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416176909] [2024-06-27 18:16:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:42,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:43,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:43,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416176909] [2024-06-27 18:16:43,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416176909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:43,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:43,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:16:43,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338511013] [2024-06-27 18:16:43,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:43,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:16:43,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:43,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:16:43,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:16:43,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-06-27 18:16:43,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:43,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:43,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-06-27 18:16:43,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:44,485 INFO L124 PetriNetUnfolderBase]: 4155/6073 cut-off events. [2024-06-27 18:16:44,485 INFO L125 PetriNetUnfolderBase]: For 2267/2267 co-relation queries the response was YES. [2024-06-27 18:16:44,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14821 conditions, 6073 events. 4155/6073 cut-off events. For 2267/2267 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 34389 event pairs, 1220 based on Foata normal form. 6/5860 useless extension candidates. Maximal degree in co-relation 14807. Up to 5857 conditions per place. [2024-06-27 18:16:44,511 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 72 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2024-06-27 18:16:44,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 488 flow [2024-06-27 18:16:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:16:44,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:16:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 18:16:44,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-27 18:16:44,513 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 179 flow. Second operand 6 states and 187 transitions. [2024-06-27 18:16:44,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 488 flow [2024-06-27 18:16:44,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 460 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 18:16:44,516 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 239 flow [2024-06-27 18:16:44,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=239, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-27 18:16:44,517 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-27 18:16:44,517 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 239 flow [2024-06-27 18:16:44,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:44,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:44,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:44,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:16:44,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:44,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:44,518 INFO L85 PathProgramCache]: Analyzing trace with hash -582442982, now seen corresponding path program 1 times [2024-06-27 18:16:44,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:44,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909985494] [2024-06-27 18:16:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:44,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:45,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:45,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909985494] [2024-06-27 18:16:45,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909985494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:45,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:45,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:16:45,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411172413] [2024-06-27 18:16:45,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:45,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:16:45,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:45,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:16:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:16:45,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:16:45,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:45,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:45,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:16:45,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:45,795 INFO L124 PetriNetUnfolderBase]: 4149/6250 cut-off events. [2024-06-27 18:16:45,795 INFO L125 PetriNetUnfolderBase]: For 4214/4214 co-relation queries the response was YES. [2024-06-27 18:16:45,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16376 conditions, 6250 events. 4149/6250 cut-off events. For 4214/4214 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36537 event pairs, 1466 based on Foata normal form. 2/5986 useless extension candidates. Maximal degree in co-relation 16359. Up to 5921 conditions per place. [2024-06-27 18:16:45,823 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 62 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-27 18:16:45,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 453 flow [2024-06-27 18:16:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:16:45,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:16:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-27 18:16:45,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563265306122449 [2024-06-27 18:16:45,825 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 239 flow. Second operand 5 states and 138 transitions. [2024-06-27 18:16:45,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 453 flow [2024-06-27 18:16:45,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 415 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 18:16:45,829 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 260 flow [2024-06-27 18:16:45,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-27 18:16:45,830 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-27 18:16:45,830 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 260 flow [2024-06-27 18:16:45,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:45,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:45,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:45,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:16:45,831 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 18:16:45,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash -854411820, now seen corresponding path program 1 times [2024-06-27 18:16:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:45,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118131794] [2024-06-27 18:16:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:45,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:46,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:46,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118131794] [2024-06-27 18:16:46,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118131794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:46,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:46,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:16:46,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571281352] [2024-06-27 18:16:46,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:46,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:16:46,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:46,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:16:46,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:16:46,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:16:46,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 260 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 18:16:46,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:46,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:16:46,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:47,410 INFO L124 PetriNetUnfolderBase]: 4888/7299 cut-off events. [2024-06-27 18:16:47,410 INFO L125 PetriNetUnfolderBase]: For 6981/6981 co-relation queries the response was YES. [2024-06-27 18:16:47,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20286 conditions, 7299 events. 4888/7299 cut-off events. For 6981/6981 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 42532 event pairs, 1754 based on Foata normal form. 2/7018 useless extension candidates. Maximal degree in co-relation 20267. Up to 6939 conditions per place. [2024-06-27 18:16:47,439 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 72 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2024-06-27 18:16:47,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 528 flow [2024-06-27 18:16:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:16:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:16:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 18:16:47,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-27 18:16:47,441 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 260 flow. Second operand 6 states and 161 transitions. [2024-06-27 18:16:47,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 528 flow [2024-06-27 18:16:47,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 499 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 18:16:47,459 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 304 flow [2024-06-27 18:16:47,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-27 18:16:47,460 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-27 18:16:47,461 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 304 flow [2024-06-27 18:16:47,461 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 18:16:47,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:47,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:47,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:16:47,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:47,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:47,462 INFO L85 PathProgramCache]: Analyzing trace with hash -877271844, now seen corresponding path program 1 times [2024-06-27 18:16:47,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:47,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054807475] [2024-06-27 18:16:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:47,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:47,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:47,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054807475] [2024-06-27 18:16:47,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054807475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:47,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:47,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:16:47,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636234485] [2024-06-27 18:16:47,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:47,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:16:47,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:47,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:16:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:16:47,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 49 [2024-06-27 18:16:47,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:47,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:47,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 49 [2024-06-27 18:16:47,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:47,750 INFO L124 PetriNetUnfolderBase]: 1231/2774 cut-off events. [2024-06-27 18:16:47,750 INFO L125 PetriNetUnfolderBase]: For 3426/3827 co-relation queries the response was YES. [2024-06-27 18:16:47,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6229 conditions, 2774 events. 1231/2774 cut-off events. For 3426/3827 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23392 event pairs, 460 based on Foata normal form. 2/2544 useless extension candidates. Maximal degree in co-relation 6210. Up to 1665 conditions per place. [2024-06-27 18:16:47,765 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 26 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-06-27 18:16:47,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 338 flow [2024-06-27 18:16:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:16:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:16:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-06-27 18:16:47,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7482993197278912 [2024-06-27 18:16:47,767 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 304 flow. Second operand 3 states and 110 transitions. [2024-06-27 18:16:47,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 338 flow [2024-06-27 18:16:47,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 308 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 18:16:47,769 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 240 flow [2024-06-27 18:16:47,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-27 18:16:47,770 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-27 18:16:47,770 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 240 flow [2024-06-27 18:16:47,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:47,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:47,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:47,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:16:47,771 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:47,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1387617671, now seen corresponding path program 1 times [2024-06-27 18:16:47,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:47,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911477880] [2024-06-27 18:16:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:47,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:48,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:48,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911477880] [2024-06-27 18:16:48,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911477880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:48,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:48,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:16:48,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134365097] [2024-06-27 18:16:48,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:48,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:16:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:48,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:16:48,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:16:48,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:16:48,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 240 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 18:16:48,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:48,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:16:48,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:49,444 INFO L124 PetriNetUnfolderBase]: 4647/6837 cut-off events. [2024-06-27 18:16:49,445 INFO L125 PetriNetUnfolderBase]: For 12071/12077 co-relation queries the response was YES. [2024-06-27 18:16:49,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19667 conditions, 6837 events. 4647/6837 cut-off events. For 12071/12077 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 38571 event pairs, 1549 based on Foata normal form. 6/6834 useless extension candidates. Maximal degree in co-relation 19648. Up to 6563 conditions per place. [2024-06-27 18:16:49,472 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 73 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2024-06-27 18:16:49,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 562 flow [2024-06-27 18:16:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:16:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:16:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-27 18:16:49,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-27 18:16:49,474 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 240 flow. Second operand 6 states and 164 transitions. [2024-06-27 18:16:49,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 562 flow [2024-06-27 18:16:49,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 542 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:16:49,479 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 310 flow [2024-06-27 18:16:49,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-27 18:16:49,480 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-27 18:16:49,480 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 310 flow [2024-06-27 18:16:49,481 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 18:16:49,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:49,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:49,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:16:49,481 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 18:16:49,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:49,482 INFO L85 PathProgramCache]: Analyzing trace with hash -694625381, now seen corresponding path program 2 times [2024-06-27 18:16:49,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:49,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852079295] [2024-06-27 18:16:49,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:49,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:50,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:50,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852079295] [2024-06-27 18:16:50,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852079295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:50,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:50,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:16:50,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743290481] [2024-06-27 18:16:50,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:50,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:16:50,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:16:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:16:50,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:16:50,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 310 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 18:16:50,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:50,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:16:50,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:50,926 INFO L124 PetriNetUnfolderBase]: 4642/6831 cut-off events. [2024-06-27 18:16:50,926 INFO L125 PetriNetUnfolderBase]: For 14464/14469 co-relation queries the response was YES. [2024-06-27 18:16:50,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20657 conditions, 6831 events. 4642/6831 cut-off events. For 14464/14469 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 38581 event pairs, 1552 based on Foata normal form. 6/6828 useless extension candidates. Maximal degree in co-relation 20636. Up to 6558 conditions per place. [2024-06-27 18:16:50,961 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 68 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-27 18:16:50,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 546 flow [2024-06-27 18:16:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:16:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:16:50,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 18:16:50,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2024-06-27 18:16:50,962 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 310 flow. Second operand 6 states and 159 transitions. [2024-06-27 18:16:50,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 546 flow [2024-06-27 18:16:50,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 512 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 18:16:50,972 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 316 flow [2024-06-27 18:16:50,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2024-06-27 18:16:50,975 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-27 18:16:50,975 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 316 flow [2024-06-27 18:16:50,975 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 18:16:50,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:50,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:50,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:16:50,976 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 18:16:50,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:50,976 INFO L85 PathProgramCache]: Analyzing trace with hash -716960695, now seen corresponding path program 1 times [2024-06-27 18:16:50,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:50,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201068155] [2024-06-27 18:16:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:50,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:51,722 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 18:16:51,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:51,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201068155] [2024-06-27 18:16:51,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201068155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:51,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:51,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:16:51,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483715118] [2024-06-27 18:16:51,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:51,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:16:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:16:51,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:16:51,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:16:51,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 316 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:51,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:51,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:16:51,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:52,675 INFO L124 PetriNetUnfolderBase]: 4197/6369 cut-off events. [2024-06-27 18:16:52,676 INFO L125 PetriNetUnfolderBase]: For 13068/13068 co-relation queries the response was YES. [2024-06-27 18:16:52,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18919 conditions, 6369 events. 4197/6369 cut-off events. For 13068/13068 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 36935 event pairs, 1357 based on Foata normal form. 4/6361 useless extension candidates. Maximal degree in co-relation 18896. Up to 5934 conditions per place. [2024-06-27 18:16:52,758 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 79 selfloop transitions, 14 changer transitions 5/109 dead transitions. [2024-06-27 18:16:52,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 626 flow [2024-06-27 18:16:52,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:16:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:16:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:16:52,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364431486880467 [2024-06-27 18:16:52,761 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 316 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:16:52,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 626 flow [2024-06-27 18:16:52,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 109 transitions, 582 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:16:52,773 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 336 flow [2024-06-27 18:16:52,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=336, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-06-27 18:16:52,774 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-27 18:16:52,774 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 336 flow [2024-06-27 18:16:52,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:52,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:52,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:52,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:16:52,775 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 18:16:52,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:52,775 INFO L85 PathProgramCache]: Analyzing trace with hash -66593079, now seen corresponding path program 1 times [2024-06-27 18:16:52,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:52,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437984724] [2024-06-27 18:16:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:52,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:53,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437984724] [2024-06-27 18:16:53,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437984724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:53,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:53,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:16:53,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942008777] [2024-06-27 18:16:53,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:53,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:16:53,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:16:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:16:53,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:16:53,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 336 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:53,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:53,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:16:53,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:54,518 INFO L124 PetriNetUnfolderBase]: 4069/6013 cut-off events. [2024-06-27 18:16:54,518 INFO L125 PetriNetUnfolderBase]: For 17939/17939 co-relation queries the response was YES. [2024-06-27 18:16:54,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19366 conditions, 6013 events. 4069/6013 cut-off events. For 17939/17939 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33588 event pairs, 1288 based on Foata normal form. 2/6013 useless extension candidates. Maximal degree in co-relation 19343. Up to 5774 conditions per place. [2024-06-27 18:16:54,548 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 86 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-06-27 18:16:54,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 112 transitions, 658 flow [2024-06-27 18:16:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:16:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:16:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:16:54,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364431486880467 [2024-06-27 18:16:54,550 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 336 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:16:54,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 112 transitions, 658 flow [2024-06-27 18:16:54,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 112 transitions, 616 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 18:16:54,558 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 362 flow [2024-06-27 18:16:54,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=362, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-06-27 18:16:54,559 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-27 18:16:54,559 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 362 flow [2024-06-27 18:16:54,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:54,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:54,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:54,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:16:54,559 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 18:16:54,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:54,560 INFO L85 PathProgramCache]: Analyzing trace with hash -66473109, now seen corresponding path program 2 times [2024-06-27 18:16:54,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:54,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676710915] [2024-06-27 18:16:54,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:54,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:55,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:55,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676710915] [2024-06-27 18:16:55,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676710915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:55,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:55,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:16:55,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002541323] [2024-06-27 18:16:55,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:55,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:16:55,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:55,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:16:55,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:16:55,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:16:55,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 362 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:55,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:55,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:16:55,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:56,152 INFO L124 PetriNetUnfolderBase]: 4090/6062 cut-off events. [2024-06-27 18:16:56,152 INFO L125 PetriNetUnfolderBase]: For 22448/22454 co-relation queries the response was YES. [2024-06-27 18:16:56,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20468 conditions, 6062 events. 4090/6062 cut-off events. For 22448/22454 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34037 event pairs, 1294 based on Foata normal form. 6/6064 useless extension candidates. Maximal degree in co-relation 20444. Up to 5717 conditions per place. [2024-06-27 18:16:56,183 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 79 selfloop transitions, 26 changer transitions 0/117 dead transitions. [2024-06-27 18:16:56,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 764 flow [2024-06-27 18:16:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:16:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:16:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 18:16:56,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451895043731778 [2024-06-27 18:16:56,185 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 362 flow. Second operand 7 states and 187 transitions. [2024-06-27 18:16:56,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 764 flow [2024-06-27 18:16:56,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 720 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 18:16:56,194 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 448 flow [2024-06-27 18:16:56,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=448, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-06-27 18:16:56,194 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-27 18:16:56,195 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 448 flow [2024-06-27 18:16:56,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:56,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:56,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:56,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:16:56,195 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 18:16:56,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash -757618253, now seen corresponding path program 1 times [2024-06-27 18:16:56,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:56,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262924581] [2024-06-27 18:16:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:56,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:56,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:56,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262924581] [2024-06-27 18:16:56,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262924581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:56,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:56,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:16:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333684351] [2024-06-27 18:16:56,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:56,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:16:56,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:16:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:16:56,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:16:56,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 448 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 18:16:56,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:56,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:16:56,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:57,841 INFO L124 PetriNetUnfolderBase]: 4356/6343 cut-off events. [2024-06-27 18:16:57,842 INFO L125 PetriNetUnfolderBase]: For 27952/27958 co-relation queries the response was YES. [2024-06-27 18:16:57,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22467 conditions, 6343 events. 4356/6343 cut-off events. For 27952/27958 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34651 event pairs, 1408 based on Foata normal form. 6/6343 useless extension candidates. Maximal degree in co-relation 22442. Up to 6095 conditions per place. [2024-06-27 18:16:57,872 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 90 selfloop transitions, 23 changer transitions 0/123 dead transitions. [2024-06-27 18:16:57,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 123 transitions, 862 flow [2024-06-27 18:16:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:16:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:16:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 18:16:57,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276967930029155 [2024-06-27 18:16:57,875 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 448 flow. Second operand 7 states and 181 transitions. [2024-06-27 18:16:57,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 123 transitions, 862 flow [2024-06-27 18:16:57,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 123 transitions, 820 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 18:16:57,891 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 522 flow [2024-06-27 18:16:57,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-27 18:16:57,891 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-27 18:16:57,892 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 522 flow [2024-06-27 18:16:57,892 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 18:16:57,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:57,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:57,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:16:57,892 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 18:16:57,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:57,893 INFO L85 PathProgramCache]: Analyzing trace with hash -58548413, now seen corresponding path program 2 times [2024-06-27 18:16:57,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:57,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740678581] [2024-06-27 18:16:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:57,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:58,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:58,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740678581] [2024-06-27 18:16:58,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740678581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:58,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:58,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:16:58,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445398712] [2024-06-27 18:16:58,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:58,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:16:58,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:58,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:16:58,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:16:58,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:16:58,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 522 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 18:16:58,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:58,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:16:58,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:59,472 INFO L124 PetriNetUnfolderBase]: 4379/6370 cut-off events. [2024-06-27 18:16:59,472 INFO L125 PetriNetUnfolderBase]: For 32798/32803 co-relation queries the response was YES. [2024-06-27 18:16:59,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23717 conditions, 6370 events. 4379/6370 cut-off events. For 32798/32803 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34715 event pairs, 1403 based on Foata normal form. 6/6372 useless extension candidates. Maximal degree in co-relation 23690. Up to 6119 conditions per place. [2024-06-27 18:16:59,501 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 87 selfloop transitions, 26 changer transitions 0/123 dead transitions. [2024-06-27 18:16:59,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 123 transitions, 910 flow [2024-06-27 18:16:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:16:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:16:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:16:59,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5189504373177842 [2024-06-27 18:16:59,505 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 522 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:16:59,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 123 transitions, 910 flow [2024-06-27 18:16:59,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 123 transitions, 874 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 18:16:59,525 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 580 flow [2024-06-27 18:16:59,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=580, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-06-27 18:16:59,526 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-27 18:16:59,526 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 580 flow [2024-06-27 18:16:59,526 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 18:16:59,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:59,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:59,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:16:59,527 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:59,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:59,527 INFO L85 PathProgramCache]: Analyzing trace with hash -751189349, now seen corresponding path program 3 times [2024-06-27 18:16:59,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:59,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517100118] [2024-06-27 18:16:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:59,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:00,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:00,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517100118] [2024-06-27 18:17:00,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517100118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:00,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:00,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:17:00,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570186660] [2024-06-27 18:17:00,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:00,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:17:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:17:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:17:00,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:17:00,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 580 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:00,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:00,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:17:00,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:01,165 INFO L124 PetriNetUnfolderBase]: 4141/6128 cut-off events. [2024-06-27 18:17:01,165 INFO L125 PetriNetUnfolderBase]: For 35492/35492 co-relation queries the response was YES. [2024-06-27 18:17:01,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23099 conditions, 6128 events. 4141/6128 cut-off events. For 35492/35492 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34289 event pairs, 1298 based on Foata normal form. 2/6123 useless extension candidates. Maximal degree in co-relation 23070. Up to 5767 conditions per place. [2024-06-27 18:17:01,192 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 80 selfloop transitions, 26 changer transitions 0/121 dead transitions. [2024-06-27 18:17:01,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 121 transitions, 872 flow [2024-06-27 18:17:01,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:17:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:17:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 18:17:01,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-06-27 18:17:01,194 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 580 flow. Second operand 7 states and 182 transitions. [2024-06-27 18:17:01,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 121 transitions, 872 flow [2024-06-27 18:17:01,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 778 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 18:17:01,212 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 546 flow [2024-06-27 18:17:01,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=546, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2024-06-27 18:17:01,213 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-27 18:17:01,213 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 546 flow [2024-06-27 18:17:01,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:01,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:01,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:01,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:17:01,214 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 18:17:01,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:01,214 INFO L85 PathProgramCache]: Analyzing trace with hash 110895747, now seen corresponding path program 3 times [2024-06-27 18:17:01,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:01,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736732848] [2024-06-27 18:17:01,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:01,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:01,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:01,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736732848] [2024-06-27 18:17:01,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736732848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:01,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:01,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:17:01,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043508504] [2024-06-27 18:17:01,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:01,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:17:01,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:01,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:17:01,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:17:01,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:01,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 546 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 18:17:01,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:01,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:01,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:02,848 INFO L124 PetriNetUnfolderBase]: 4369/6354 cut-off events. [2024-06-27 18:17:02,848 INFO L125 PetriNetUnfolderBase]: For 38134/38139 co-relation queries the response was YES. [2024-06-27 18:17:02,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24138 conditions, 6354 events. 4369/6354 cut-off events. For 38134/38139 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34536 event pairs, 1403 based on Foata normal form. 6/6356 useless extension candidates. Maximal degree in co-relation 24108. Up to 6107 conditions per place. [2024-06-27 18:17:02,886 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 84 selfloop transitions, 27 changer transitions 0/121 dead transitions. [2024-06-27 18:17:02,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 848 flow [2024-06-27 18:17:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:17:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:17:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:17:02,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-27 18:17:02,889 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 546 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:17:02,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 848 flow [2024-06-27 18:17:02,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 121 transitions, 764 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:02,910 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 524 flow [2024-06-27 18:17:02,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=524, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-06-27 18:17:02,911 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-27 18:17:02,911 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 524 flow [2024-06-27 18:17:02,911 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 18:17:02,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:02,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:02,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:17:02,912 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:02,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:02,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1245742655, now seen corresponding path program 1 times [2024-06-27 18:17:02,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:02,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060882205] [2024-06-27 18:17:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:02,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:03,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:03,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060882205] [2024-06-27 18:17:03,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060882205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:03,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:03,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:17:03,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096696691] [2024-06-27 18:17:03,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:03,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:17:03,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:17:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:17:03,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-06-27 18:17:03,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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 18:17:03,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:03,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-06-27 18:17:03,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:04,090 INFO L124 PetriNetUnfolderBase]: 3279/5836 cut-off events. [2024-06-27 18:17:04,090 INFO L125 PetriNetUnfolderBase]: For 35342/35358 co-relation queries the response was YES. [2024-06-27 18:17:04,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20184 conditions, 5836 events. 3279/5836 cut-off events. For 35342/35358 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 40670 event pairs, 1483 based on Foata normal form. 5/5659 useless extension candidates. Maximal degree in co-relation 20153. Up to 4730 conditions per place. [2024-06-27 18:17:04,125 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 75 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-06-27 18:17:04,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 107 transitions, 769 flow [2024-06-27 18:17:04,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:17:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:17:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-27 18:17:04,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2024-06-27 18:17:04,127 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 524 flow. Second operand 5 states and 131 transitions. [2024-06-27 18:17:04,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 107 transitions, 769 flow [2024-06-27 18:17:04,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 701 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:04,151 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 544 flow [2024-06-27 18:17:04,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=544, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-06-27 18:17:04,151 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-27 18:17:04,151 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 544 flow [2024-06-27 18:17:04,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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 18:17:04,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:04,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:04,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:17:04,152 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 18:17:04,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2060808611, now seen corresponding path program 1 times [2024-06-27 18:17:04,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:04,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922593448] [2024-06-27 18:17:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:04,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:05,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:05,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922593448] [2024-06-27 18:17:05,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922593448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:05,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:05,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:05,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953062930] [2024-06-27 18:17:05,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:05,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:05,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:05,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:05,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 544 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 18:17:05,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:05,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:05,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:05,950 INFO L124 PetriNetUnfolderBase]: 4394/7147 cut-off events. [2024-06-27 18:17:05,950 INFO L125 PetriNetUnfolderBase]: For 46136/46136 co-relation queries the response was YES. [2024-06-27 18:17:05,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26358 conditions, 7147 events. 4394/7147 cut-off events. For 46136/46136 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 45260 event pairs, 1633 based on Foata normal form. 2/6906 useless extension candidates. Maximal degree in co-relation 26325. Up to 6204 conditions per place. [2024-06-27 18:17:05,995 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 114 selfloop transitions, 20 changer transitions 0/144 dead transitions. [2024-06-27 18:17:05,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 144 transitions, 968 flow [2024-06-27 18:17:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:17:05,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-06-27 18:17:05,997 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 544 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:17:05,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 144 transitions, 968 flow [2024-06-27 18:17:06,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 144 transitions, 945 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 18:17:06,019 INFO L231 Difference]: Finished difference. Result has 93 places, 96 transitions, 611 flow [2024-06-27 18:17:06,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=611, PETRI_PLACES=93, PETRI_TRANSITIONS=96} [2024-06-27 18:17:06,020 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-27 18:17:06,020 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 96 transitions, 611 flow [2024-06-27 18:17:06,020 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 18:17:06,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:06,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:06,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:17:06,020 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 18:17:06,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:06,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2034267130, now seen corresponding path program 1 times [2024-06-27 18:17:06,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:06,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889575483] [2024-06-27 18:17:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:06,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:06,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:06,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889575483] [2024-06-27 18:17:06,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889575483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:06,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:06,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:06,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774716102] [2024-06-27 18:17:06,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:06,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:06,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:06,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:06,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:06,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:06,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 96 transitions, 611 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 18:17:06,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:06,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:06,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:08,006 INFO L124 PetriNetUnfolderBase]: 4440/7097 cut-off events. [2024-06-27 18:17:08,007 INFO L125 PetriNetUnfolderBase]: For 53735/53741 co-relation queries the response was YES. [2024-06-27 18:17:08,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27640 conditions, 7097 events. 4440/7097 cut-off events. For 53735/53741 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 43906 event pairs, 1446 based on Foata normal form. 5/6888 useless extension candidates. Maximal degree in co-relation 27605. Up to 6071 conditions per place. [2024-06-27 18:17:08,046 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 109 selfloop transitions, 34 changer transitions 0/153 dead transitions. [2024-06-27 18:17:08,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 153 transitions, 1153 flow [2024-06-27 18:17:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:17:08,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 18:17:08,048 INFO L175 Difference]: Start difference. First operand has 93 places, 96 transitions, 611 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:17:08,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 153 transitions, 1153 flow [2024-06-27 18:17:08,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 153 transitions, 1087 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:08,074 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 695 flow [2024-06-27 18:17:08,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=695, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-06-27 18:17:08,074 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2024-06-27 18:17:08,074 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 695 flow [2024-06-27 18:17:08,075 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 18:17:08,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:08,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:08,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:17:08,075 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 18:17:08,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2060658881, now seen corresponding path program 2 times [2024-06-27 18:17:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066139381] [2024-06-27 18:17:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:08,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:08,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066139381] [2024-06-27 18:17:08,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066139381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:08,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:08,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:08,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809387684] [2024-06-27 18:17:08,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:08,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:08,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:08,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:08,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:08,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:08,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 695 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 18:17:08,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:08,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:08,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:09,946 INFO L124 PetriNetUnfolderBase]: 4491/7166 cut-off events. [2024-06-27 18:17:09,947 INFO L125 PetriNetUnfolderBase]: For 61836/61839 co-relation queries the response was YES. [2024-06-27 18:17:09,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29184 conditions, 7166 events. 4491/7166 cut-off events. For 61836/61839 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 44195 event pairs, 1522 based on Foata normal form. 4/6962 useless extension candidates. Maximal degree in co-relation 29148. Up to 6113 conditions per place. [2024-06-27 18:17:09,993 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 105 selfloop transitions, 46 changer transitions 0/161 dead transitions. [2024-06-27 18:17:09,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 161 transitions, 1385 flow [2024-06-27 18:17:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:17:09,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 18:17:09,997 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 695 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:17:09,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 161 transitions, 1385 flow [2024-06-27 18:17:10,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 161 transitions, 1335 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 18:17:10,031 INFO L231 Difference]: Finished difference. Result has 99 places, 111 transitions, 883 flow [2024-06-27 18:17:10,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=883, PETRI_PLACES=99, PETRI_TRANSITIONS=111} [2024-06-27 18:17:10,032 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-27 18:17:10,032 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 111 transitions, 883 flow [2024-06-27 18:17:10,033 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 18:17:10,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:10,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:10,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:17:10,033 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:10,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:10,034 INFO L85 PathProgramCache]: Analyzing trace with hash 563506441, now seen corresponding path program 3 times [2024-06-27 18:17:10,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:10,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733300673] [2024-06-27 18:17:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:10,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:10,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:10,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733300673] [2024-06-27 18:17:10,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733300673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:10,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:10,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969106881] [2024-06-27 18:17:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:10,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:10,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:10,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:10,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 111 transitions, 883 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 18:17:10,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:10,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:10,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:11,969 INFO L124 PetriNetUnfolderBase]: 4486/7157 cut-off events. [2024-06-27 18:17:11,969 INFO L125 PetriNetUnfolderBase]: For 69383/69386 co-relation queries the response was YES. [2024-06-27 18:17:11,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30243 conditions, 7157 events. 4486/7157 cut-off events. For 69383/69386 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 44143 event pairs, 1514 based on Foata normal form. 4/6951 useless extension candidates. Maximal degree in co-relation 30205. Up to 6108 conditions per place. [2024-06-27 18:17:12,020 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 104 selfloop transitions, 45 changer transitions 0/159 dead transitions. [2024-06-27 18:17:12,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 159 transitions, 1371 flow [2024-06-27 18:17:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:17:12,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331632653061225 [2024-06-27 18:17:12,021 INFO L175 Difference]: Start difference. First operand has 99 places, 111 transitions, 883 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:17:12,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 159 transitions, 1371 flow [2024-06-27 18:17:12,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 159 transitions, 1285 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 18:17:12,069 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 895 flow [2024-06-27 18:17:12,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=895, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2024-06-27 18:17:12,070 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-27 18:17:12,070 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 895 flow [2024-06-27 18:17:12,070 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 18:17:12,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:12,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:12,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:17:12,071 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 18:17:12,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:12,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1815004651, now seen corresponding path program 4 times [2024-06-27 18:17:12,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:12,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191248006] [2024-06-27 18:17:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:12,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:12,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:12,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191248006] [2024-06-27 18:17:12,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191248006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:12,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:12,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:12,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412097517] [2024-06-27 18:17:12,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:12,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:12,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:12,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 895 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 18:17:12,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:12,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:12,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:13,881 INFO L124 PetriNetUnfolderBase]: 4509/6728 cut-off events. [2024-06-27 18:17:13,881 INFO L125 PetriNetUnfolderBase]: For 73766/73766 co-relation queries the response was YES. [2024-06-27 18:17:13,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30399 conditions, 6728 events. 4509/6728 cut-off events. For 73766/73766 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 38314 event pairs, 1370 based on Foata normal form. 2/6674 useless extension candidates. Maximal degree in co-relation 30359. Up to 6132 conditions per place. [2024-06-27 18:17:13,930 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 100 selfloop transitions, 49 changer transitions 0/159 dead transitions. [2024-06-27 18:17:13,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 159 transitions, 1435 flow [2024-06-27 18:17:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:17:13,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229591836734694 [2024-06-27 18:17:13,932 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 895 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:17:13,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 159 transitions, 1435 flow [2024-06-27 18:17:13,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 159 transitions, 1319 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 18:17:13,972 INFO L231 Difference]: Finished difference. Result has 105 places, 114 transitions, 941 flow [2024-06-27 18:17:13,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=105, PETRI_TRANSITIONS=114} [2024-06-27 18:17:13,972 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-27 18:17:13,972 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 114 transitions, 941 flow [2024-06-27 18:17:13,973 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 18:17:13,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:13,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:13,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:17:13,973 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 18:17:13,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1804673974, now seen corresponding path program 2 times [2024-06-27 18:17:13,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:13,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71402436] [2024-06-27 18:17:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:13,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:14,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:14,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71402436] [2024-06-27 18:17:14,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71402436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:14,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:14,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:14,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24159559] [2024-06-27 18:17:14,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:14,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:14,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:14,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:14,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:14,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:14,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 114 transitions, 941 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 18:17:14,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:14,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:14,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:15,852 INFO L124 PetriNetUnfolderBase]: 4611/6878 cut-off events. [2024-06-27 18:17:15,853 INFO L125 PetriNetUnfolderBase]: For 81205/81210 co-relation queries the response was YES. [2024-06-27 18:17:15,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31476 conditions, 6878 events. 4611/6878 cut-off events. For 81205/81210 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 39244 event pairs, 1271 based on Foata normal form. 8/6834 useless extension candidates. Maximal degree in co-relation 31435. Up to 6253 conditions per place. [2024-06-27 18:17:15,901 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 119 selfloop transitions, 41 changer transitions 0/170 dead transitions. [2024-06-27 18:17:15,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 170 transitions, 1619 flow [2024-06-27 18:17:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 18:17:15,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-06-27 18:17:15,902 INFO L175 Difference]: Start difference. First operand has 105 places, 114 transitions, 941 flow. Second operand 8 states and 208 transitions. [2024-06-27 18:17:15,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 170 transitions, 1619 flow [2024-06-27 18:17:15,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 170 transitions, 1466 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:15,945 INFO L231 Difference]: Finished difference. Result has 107 places, 120 transitions, 958 flow [2024-06-27 18:17:15,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=958, PETRI_PLACES=107, PETRI_TRANSITIONS=120} [2024-06-27 18:17:15,946 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-27 18:17:15,946 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 120 transitions, 958 flow [2024-06-27 18:17:15,946 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 18:17:15,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:15,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:15,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:17:15,949 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:15,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:15,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1916768351, now seen corresponding path program 5 times [2024-06-27 18:17:15,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:15,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357567776] [2024-06-27 18:17:15,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:15,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:16,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:16,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357567776] [2024-06-27 18:17:16,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357567776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:16,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:16,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:16,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613962328] [2024-06-27 18:17:16,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:16,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:16,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:16,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:16,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:16,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:16,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 120 transitions, 958 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 18:17:16,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:16,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:16,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:17,786 INFO L124 PetriNetUnfolderBase]: 4634/6931 cut-off events. [2024-06-27 18:17:17,787 INFO L125 PetriNetUnfolderBase]: For 85828/85828 co-relation queries the response was YES. [2024-06-27 18:17:17,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31860 conditions, 6931 events. 4634/6931 cut-off events. For 85828/85828 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 39649 event pairs, 1384 based on Foata normal form. 2/6873 useless extension candidates. Maximal degree in co-relation 31818. Up to 6298 conditions per place. [2024-06-27 18:17:17,838 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 107 selfloop transitions, 51 changer transitions 0/168 dead transitions. [2024-06-27 18:17:17,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 168 transitions, 1510 flow [2024-06-27 18:17:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:17:17,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-06-27 18:17:17,839 INFO L175 Difference]: Start difference. First operand has 107 places, 120 transitions, 958 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:17:17,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 168 transitions, 1510 flow [2024-06-27 18:17:17,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 168 transitions, 1418 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 18:17:17,888 INFO L231 Difference]: Finished difference. Result has 111 places, 123 transitions, 1018 flow [2024-06-27 18:17:17,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1018, PETRI_PLACES=111, PETRI_TRANSITIONS=123} [2024-06-27 18:17:17,888 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-27 18:17:17,888 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 123 transitions, 1018 flow [2024-06-27 18:17:17,888 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 18:17:17,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:17,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:17,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:17:17,889 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:17,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:17,889 INFO L85 PathProgramCache]: Analyzing trace with hash -864548840, now seen corresponding path program 3 times [2024-06-27 18:17:17,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:17,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074066158] [2024-06-27 18:17:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:17,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:18,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:18,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074066158] [2024-06-27 18:17:18,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074066158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:18,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:18,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:18,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648910667] [2024-06-27 18:17:18,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:18,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:18,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:18,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:18,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:18,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 123 transitions, 1018 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 18:17:18,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:18,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:18,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:19,661 INFO L124 PetriNetUnfolderBase]: 4624/6913 cut-off events. [2024-06-27 18:17:19,661 INFO L125 PetriNetUnfolderBase]: For 89442/89447 co-relation queries the response was YES. [2024-06-27 18:17:19,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31769 conditions, 6913 events. 4624/6913 cut-off events. For 89442/89447 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39638 event pairs, 1273 based on Foata normal form. 8/6866 useless extension candidates. Maximal degree in co-relation 31726. Up to 6277 conditions per place. [2024-06-27 18:17:19,708 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 121 selfloop transitions, 40 changer transitions 0/171 dead transitions. [2024-06-27 18:17:19,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 171 transitions, 1544 flow [2024-06-27 18:17:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 18:17:19,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5280612244897959 [2024-06-27 18:17:19,710 INFO L175 Difference]: Start difference. First operand has 111 places, 123 transitions, 1018 flow. Second operand 8 states and 207 transitions. [2024-06-27 18:17:19,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 171 transitions, 1544 flow [2024-06-27 18:17:19,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 171 transitions, 1416 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 18:17:19,767 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 978 flow [2024-06-27 18:17:19,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=978, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-06-27 18:17:19,773 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-06-27 18:17:19,773 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 978 flow [2024-06-27 18:17:19,773 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 18:17:19,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:19,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:19,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:17:19,774 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:19,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:19,775 INFO L85 PathProgramCache]: Analyzing trace with hash -856930280, now seen corresponding path program 4 times [2024-06-27 18:17:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:19,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885866159] [2024-06-27 18:17:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:19,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:20,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:20,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885866159] [2024-06-27 18:17:20,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885866159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:20,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:20,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:20,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554086478] [2024-06-27 18:17:20,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:20,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:20,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:20,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:20,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:20,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 978 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 18:17:20,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:20,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:20,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:21,536 INFO L124 PetriNetUnfolderBase]: 4614/6902 cut-off events. [2024-06-27 18:17:21,537 INFO L125 PetriNetUnfolderBase]: For 93397/93402 co-relation queries the response was YES. [2024-06-27 18:17:21,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31750 conditions, 6902 events. 4614/6902 cut-off events. For 93397/93402 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 39632 event pairs, 1270 based on Foata normal form. 8/6854 useless extension candidates. Maximal degree in co-relation 31706. Up to 6269 conditions per place. [2024-06-27 18:17:21,583 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 115 selfloop transitions, 43 changer transitions 0/168 dead transitions. [2024-06-27 18:17:21,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 168 transitions, 1406 flow [2024-06-27 18:17:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:17:21,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-06-27 18:17:21,585 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 978 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:17:21,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 168 transitions, 1406 flow [2024-06-27 18:17:21,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 168 transitions, 1261 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 18:17:21,635 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 927 flow [2024-06-27 18:17:21,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=927, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-06-27 18:17:21,635 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-06-27 18:17:21,636 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 927 flow [2024-06-27 18:17:21,636 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 18:17:21,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:21,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:21,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:17:21,636 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:21,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:21,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1804674191, now seen corresponding path program 6 times [2024-06-27 18:17:21,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:21,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522030732] [2024-06-27 18:17:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:21,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:22,418 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 18:17:22,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:22,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522030732] [2024-06-27 18:17:22,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522030732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:22,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:22,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:22,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313226695] [2024-06-27 18:17:22,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:22,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:22,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:22,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:22,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:22,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 927 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 18:17:22,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:22,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:22,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:23,530 INFO L124 PetriNetUnfolderBase]: 4609/6909 cut-off events. [2024-06-27 18:17:23,530 INFO L125 PetriNetUnfolderBase]: For 96968/96968 co-relation queries the response was YES. [2024-06-27 18:17:23,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31761 conditions, 6909 events. 4609/6909 cut-off events. For 96968/96968 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 39695 event pairs, 1383 based on Foata normal form. 2/6846 useless extension candidates. Maximal degree in co-relation 31716. Up to 6265 conditions per place. [2024-06-27 18:17:23,578 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 102 selfloop transitions, 54 changer transitions 0/166 dead transitions. [2024-06-27 18:17:23,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 166 transitions, 1347 flow [2024-06-27 18:17:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:17:23,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-06-27 18:17:23,580 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 927 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:17:23,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 166 transitions, 1347 flow [2024-06-27 18:17:23,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 166 transitions, 1227 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 18:17:23,636 INFO L231 Difference]: Finished difference. Result has 115 places, 123 transitions, 923 flow [2024-06-27 18:17:23,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=923, PETRI_PLACES=115, PETRI_TRANSITIONS=123} [2024-06-27 18:17:23,637 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-27 18:17:23,637 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 123 transitions, 923 flow [2024-06-27 18:17:23,637 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 18:17:23,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:23,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:23,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:17:23,637 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:23,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:23,638 INFO L85 PathProgramCache]: Analyzing trace with hash 36684716, now seen corresponding path program 1 times [2024-06-27 18:17:23,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:23,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90231645] [2024-06-27 18:17:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:23,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:24,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:24,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90231645] [2024-06-27 18:17:24,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90231645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:24,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:24,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:17:24,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538006493] [2024-06-27 18:17:24,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:24,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:17:24,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:24,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:17:24,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:17:24,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-06-27 18:17:24,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 923 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:24,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:24,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-06-27 18:17:24,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:25,378 INFO L124 PetriNetUnfolderBase]: 3475/5864 cut-off events. [2024-06-27 18:17:25,378 INFO L125 PetriNetUnfolderBase]: For 86306/86341 co-relation queries the response was YES. [2024-06-27 18:17:25,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25704 conditions, 5864 events. 3475/5864 cut-off events. For 86306/86341 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 38869 event pairs, 1454 based on Foata normal form. 13/5773 useless extension candidates. Maximal degree in co-relation 25658. Up to 4911 conditions per place. [2024-06-27 18:17:25,423 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 101 selfloop transitions, 12 changer transitions 0/146 dead transitions. [2024-06-27 18:17:25,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 146 transitions, 1221 flow [2024-06-27 18:17:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:17:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:17:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 18:17:25,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-06-27 18:17:25,425 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 923 flow. Second operand 6 states and 156 transitions. [2024-06-27 18:17:25,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 146 transitions, 1221 flow [2024-06-27 18:17:25,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 146 transitions, 1089 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 18:17:25,474 INFO L231 Difference]: Finished difference. Result has 113 places, 126 transitions, 851 flow [2024-06-27 18:17:25,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=851, PETRI_PLACES=113, PETRI_TRANSITIONS=126} [2024-06-27 18:17:25,475 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-27 18:17:25,475 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 126 transitions, 851 flow [2024-06-27 18:17:25,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:25,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:25,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:25,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:17:25,476 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 18:17:25,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:25,476 INFO L85 PathProgramCache]: Analyzing trace with hash 425760008, now seen corresponding path program 1 times [2024-06-27 18:17:25,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:25,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020386728] [2024-06-27 18:17:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:25,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:26,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:26,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020386728] [2024-06-27 18:17:26,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020386728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:26,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:26,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:26,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018724692] [2024-06-27 18:17:26,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:26,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:26,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:26,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:26,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:26,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:17:26,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 126 transitions, 851 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 18:17:26,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:26,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:17:26,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:27,405 INFO L124 PetriNetUnfolderBase]: 4457/7313 cut-off events. [2024-06-27 18:17:27,406 INFO L125 PetriNetUnfolderBase]: For 110871/110885 co-relation queries the response was YES. [2024-06-27 18:17:27,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32541 conditions, 7313 events. 4457/7313 cut-off events. For 110871/110885 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 46969 event pairs, 1077 based on Foata normal form. 6/7087 useless extension candidates. Maximal degree in co-relation 32494. Up to 6143 conditions per place. [2024-06-27 18:17:27,462 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 146 selfloop transitions, 23 changer transitions 0/190 dead transitions. [2024-06-27 18:17:27,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 190 transitions, 1513 flow [2024-06-27 18:17:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 18:17:27,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-27 18:17:27,463 INFO L175 Difference]: Start difference. First operand has 113 places, 126 transitions, 851 flow. Second operand 9 states and 237 transitions. [2024-06-27 18:17:27,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 190 transitions, 1513 flow [2024-06-27 18:17:27,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 190 transitions, 1475 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 18:17:27,517 INFO L231 Difference]: Finished difference. Result has 118 places, 130 transitions, 946 flow [2024-06-27 18:17:27,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=946, PETRI_PLACES=118, PETRI_TRANSITIONS=130} [2024-06-27 18:17:27,522 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-27 18:17:27,522 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 130 transitions, 946 flow [2024-06-27 18:17:27,522 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 18:17:27,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:27,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:27,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:17:27,523 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 18:17:27,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:27,523 INFO L85 PathProgramCache]: Analyzing trace with hash 425820458, now seen corresponding path program 2 times [2024-06-27 18:17:27,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:27,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036516366] [2024-06-27 18:17:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:27,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:28,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:28,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036516366] [2024-06-27 18:17:28,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036516366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:28,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:28,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:28,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495324468] [2024-06-27 18:17:28,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:28,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:28,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:28,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:28,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:17:28,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 130 transitions, 946 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 18:17:28,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:28,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:17:28,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:29,488 INFO L124 PetriNetUnfolderBase]: 4449/7315 cut-off events. [2024-06-27 18:17:29,488 INFO L125 PetriNetUnfolderBase]: For 118342/118356 co-relation queries the response was YES. [2024-06-27 18:17:29,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32998 conditions, 7315 events. 4449/7315 cut-off events. For 118342/118356 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 47147 event pairs, 1433 based on Foata normal form. 6/7084 useless extension candidates. Maximal degree in co-relation 32950. Up to 6226 conditions per place. [2024-06-27 18:17:29,542 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 139 selfloop transitions, 19 changer transitions 0/179 dead transitions. [2024-06-27 18:17:29,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 179 transitions, 1384 flow [2024-06-27 18:17:29,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:17:29,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331632653061225 [2024-06-27 18:17:29,544 INFO L175 Difference]: Start difference. First operand has 118 places, 130 transitions, 946 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:17:29,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 179 transitions, 1384 flow [2024-06-27 18:17:29,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 179 transitions, 1296 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 18:17:29,682 INFO L231 Difference]: Finished difference. Result has 121 places, 130 transitions, 903 flow [2024-06-27 18:17:29,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=903, PETRI_PLACES=121, PETRI_TRANSITIONS=130} [2024-06-27 18:17:29,683 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-27 18:17:29,683 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 130 transitions, 903 flow [2024-06-27 18:17:29,683 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 18:17:29,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:29,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:29,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:17:29,684 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:29,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash 284363786, now seen corresponding path program 1 times [2024-06-27 18:17:29,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:29,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986845913] [2024-06-27 18:17:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:29,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:30,453 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 18:17:30,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:30,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986845913] [2024-06-27 18:17:30,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986845913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:30,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:30,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103637897] [2024-06-27 18:17:30,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:30,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:30,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:30,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 130 transitions, 903 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 18:17:30,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:30,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:30,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:31,594 INFO L124 PetriNetUnfolderBase]: 4735/7664 cut-off events. [2024-06-27 18:17:31,594 INFO L125 PetriNetUnfolderBase]: For 127194/127194 co-relation queries the response was YES. [2024-06-27 18:17:31,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34724 conditions, 7664 events. 4735/7664 cut-off events. For 127194/127194 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 48563 event pairs, 1498 based on Foata normal form. 4/7426 useless extension candidates. Maximal degree in co-relation 34674. Up to 6652 conditions per place. [2024-06-27 18:17:31,646 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 157 selfloop transitions, 23 changer transitions 0/190 dead transitions. [2024-06-27 18:17:31,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 190 transitions, 1453 flow [2024-06-27 18:17:31,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 18:17:31,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147392290249433 [2024-06-27 18:17:31,647 INFO L175 Difference]: Start difference. First operand has 121 places, 130 transitions, 903 flow. Second operand 9 states and 227 transitions. [2024-06-27 18:17:31,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 190 transitions, 1453 flow [2024-06-27 18:17:31,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 190 transitions, 1410 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 18:17:31,695 INFO L231 Difference]: Finished difference. Result has 123 places, 133 transitions, 968 flow [2024-06-27 18:17:31,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=968, PETRI_PLACES=123, PETRI_TRANSITIONS=133} [2024-06-27 18:17:31,695 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-27 18:17:31,696 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 133 transitions, 968 flow [2024-06-27 18:17:31,696 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 18:17:31,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:31,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:31,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:17:31,696 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 18:17:31,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:31,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1362411128, now seen corresponding path program 3 times [2024-06-27 18:17:31,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:31,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007845568] [2024-06-27 18:17:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:31,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:32,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:32,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007845568] [2024-06-27 18:17:32,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007845568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:32,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:32,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:32,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441835274] [2024-06-27 18:17:32,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:32,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:32,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:32,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:32,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:32,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:17:32,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 133 transitions, 968 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 18:17:32,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:32,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:17:32,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:33,802 INFO L124 PetriNetUnfolderBase]: 4531/7355 cut-off events. [2024-06-27 18:17:33,802 INFO L125 PetriNetUnfolderBase]: For 137182/137199 co-relation queries the response was YES. [2024-06-27 18:17:33,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34695 conditions, 7355 events. 4531/7355 cut-off events. For 137182/137199 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 46562 event pairs, 1294 based on Foata normal form. 8/7149 useless extension candidates. Maximal degree in co-relation 34644. Up to 6252 conditions per place. [2024-06-27 18:17:33,855 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 131 selfloop transitions, 30 changer transitions 0/182 dead transitions. [2024-06-27 18:17:33,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 182 transitions, 1452 flow [2024-06-27 18:17:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:17:33,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 18:17:33,856 INFO L175 Difference]: Start difference. First operand has 123 places, 133 transitions, 968 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:17:33,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 182 transitions, 1452 flow [2024-06-27 18:17:33,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 182 transitions, 1368 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 18:17:33,926 INFO L231 Difference]: Finished difference. Result has 124 places, 135 transitions, 999 flow [2024-06-27 18:17:33,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=999, PETRI_PLACES=124, PETRI_TRANSITIONS=135} [2024-06-27 18:17:33,926 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-27 18:17:33,927 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 135 transitions, 999 flow [2024-06-27 18:17:33,927 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 18:17:33,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:33,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:33,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:17:33,927 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 18:17:33,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash 289005416, now seen corresponding path program 2 times [2024-06-27 18:17:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:33,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286723791] [2024-06-27 18:17:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:33,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:34,781 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 18:17:34,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:34,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286723791] [2024-06-27 18:17:34,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286723791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:34,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:34,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:34,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659535640] [2024-06-27 18:17:34,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:34,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:34,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:34,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:34,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 135 transitions, 999 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 18:17:34,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:34,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:34,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:36,155 INFO L124 PetriNetUnfolderBase]: 4930/7897 cut-off events. [2024-06-27 18:17:36,155 INFO L125 PetriNetUnfolderBase]: For 157175/157178 co-relation queries the response was YES. [2024-06-27 18:17:36,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38318 conditions, 7897 events. 4930/7897 cut-off events. For 157175/157178 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 49462 event pairs, 1275 based on Foata normal form. 4/7678 useless extension candidates. Maximal degree in co-relation 38266. Up to 6275 conditions per place. [2024-06-27 18:17:36,215 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 132 selfloop transitions, 70 changer transitions 0/212 dead transitions. [2024-06-27 18:17:36,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 212 transitions, 2133 flow [2024-06-27 18:17:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-27 18:17:36,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 18:17:36,217 INFO L175 Difference]: Start difference. First operand has 124 places, 135 transitions, 999 flow. Second operand 9 states and 245 transitions. [2024-06-27 18:17:36,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 212 transitions, 2133 flow [2024-06-27 18:17:36,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 212 transitions, 2036 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:36,305 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1280 flow [2024-06-27 18:17:36,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1280, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-27 18:17:36,306 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-27 18:17:36,306 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1280 flow [2024-06-27 18:17:36,306 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 18:17:36,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:36,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:36,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:17:36,306 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 18:17:36,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:36,307 INFO L85 PathProgramCache]: Analyzing trace with hash 544092588, now seen corresponding path program 3 times [2024-06-27 18:17:36,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:36,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701153480] [2024-06-27 18:17:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:36,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:37,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:37,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701153480] [2024-06-27 18:17:37,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701153480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:37,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:37,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:37,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791307533] [2024-06-27 18:17:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:37,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:37,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:37,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:37,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:37,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1280 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 18:17:37,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:37,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:37,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:38,513 INFO L124 PetriNetUnfolderBase]: 4920/7883 cut-off events. [2024-06-27 18:17:38,513 INFO L125 PetriNetUnfolderBase]: For 166821/166824 co-relation queries the response was YES. [2024-06-27 18:17:38,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39242 conditions, 7883 events. 4920/7883 cut-off events. For 166821/166824 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 49484 event pairs, 1275 based on Foata normal form. 4/7664 useless extension candidates. Maximal degree in co-relation 39189. Up to 6267 conditions per place. [2024-06-27 18:17:38,581 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 127 selfloop transitions, 72 changer transitions 0/209 dead transitions. [2024-06-27 18:17:38,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 209 transitions, 2070 flow [2024-06-27 18:17:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 18:17:38,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546485260770975 [2024-06-27 18:17:38,583 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1280 flow. Second operand 9 states and 241 transitions. [2024-06-27 18:17:38,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 209 transitions, 2070 flow [2024-06-27 18:17:38,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 209 transitions, 1942 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-27 18:17:38,701 INFO L231 Difference]: Finished difference. Result has 133 places, 147 transitions, 1304 flow [2024-06-27 18:17:38,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1304, PETRI_PLACES=133, PETRI_TRANSITIONS=147} [2024-06-27 18:17:38,702 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-27 18:17:38,702 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 147 transitions, 1304 flow [2024-06-27 18:17:38,702 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 18:17:38,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:38,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:38,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:17:38,703 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:38,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:38,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1362406168, now seen corresponding path program 4 times [2024-06-27 18:17:38,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:38,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466729225] [2024-06-27 18:17:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:38,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:39,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:39,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466729225] [2024-06-27 18:17:39,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466729225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:39,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005750801] [2024-06-27 18:17:39,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:39,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:39,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:39,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:39,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 147 transitions, 1304 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 18:17:39,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:39,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:39,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:40,972 INFO L124 PetriNetUnfolderBase]: 4910/7869 cut-off events. [2024-06-27 18:17:40,972 INFO L125 PetriNetUnfolderBase]: For 169404/169407 co-relation queries the response was YES. [2024-06-27 18:17:41,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39277 conditions, 7869 events. 4910/7869 cut-off events. For 169404/169407 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 49400 event pairs, 1273 based on Foata normal form. 4/7650 useless extension candidates. Maximal degree in co-relation 39222. Up to 6259 conditions per place. [2024-06-27 18:17:41,038 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 129 selfloop transitions, 69 changer transitions 0/208 dead transitions. [2024-06-27 18:17:41,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 208 transitions, 1974 flow [2024-06-27 18:17:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 18:17:41,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487528344671202 [2024-06-27 18:17:41,040 INFO L175 Difference]: Start difference. First operand has 133 places, 147 transitions, 1304 flow. Second operand 9 states and 242 transitions. [2024-06-27 18:17:41,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 208 transitions, 1974 flow [2024-06-27 18:17:41,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 208 transitions, 1806 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 18:17:41,149 INFO L231 Difference]: Finished difference. Result has 135 places, 147 transitions, 1282 flow [2024-06-27 18:17:41,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1282, PETRI_PLACES=135, PETRI_TRANSITIONS=147} [2024-06-27 18:17:41,150 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-27 18:17:41,150 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 147 transitions, 1282 flow [2024-06-27 18:17:41,150 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 18:17:41,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:41,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:41,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:17:41,151 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 18:17:41,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:41,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1123848480, now seen corresponding path program 1 times [2024-06-27 18:17:41,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:41,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607691501] [2024-06-27 18:17:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:41,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:41,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:41,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607691501] [2024-06-27 18:17:41,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607691501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:41,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:41,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:17:41,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40046809] [2024-06-27 18:17:41,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:41,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:17:41,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:41,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:17:41,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:17:41,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:17:41,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 147 transitions, 1282 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 18:17:41,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:41,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:17:41,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:42,724 INFO L124 PetriNetUnfolderBase]: 4296/6994 cut-off events. [2024-06-27 18:17:42,725 INFO L125 PetriNetUnfolderBase]: For 172999/173051 co-relation queries the response was YES. [2024-06-27 18:17:42,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35881 conditions, 6994 events. 4296/6994 cut-off events. For 172999/173051 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 45733 event pairs, 1587 based on Foata normal form. 10/6856 useless extension candidates. Maximal degree in co-relation 35825. Up to 6083 conditions per place. [2024-06-27 18:17:42,788 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 132 selfloop transitions, 15 changer transitions 0/179 dead transitions. [2024-06-27 18:17:42,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 179 transitions, 1724 flow [2024-06-27 18:17:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:17:42,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:17:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 18:17:42,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-27 18:17:42,790 INFO L175 Difference]: Start difference. First operand has 135 places, 147 transitions, 1282 flow. Second operand 6 states and 155 transitions. [2024-06-27 18:17:42,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 179 transitions, 1724 flow [2024-06-27 18:17:42,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 179 transitions, 1536 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 18:17:42,905 INFO L231 Difference]: Finished difference. Result has 133 places, 156 transitions, 1248 flow [2024-06-27 18:17:42,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1248, PETRI_PLACES=133, PETRI_TRANSITIONS=156} [2024-06-27 18:17:42,905 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-27 18:17:42,905 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 156 transitions, 1248 flow [2024-06-27 18:17:42,905 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 18:17:42,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:42,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:42,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:17:42,906 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 18:17:42,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:42,906 INFO L85 PathProgramCache]: Analyzing trace with hash -338402214, now seen corresponding path program 4 times [2024-06-27 18:17:42,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:42,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782810537] [2024-06-27 18:17:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:42,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:43,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:43,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782810537] [2024-06-27 18:17:43,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782810537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:43,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:43,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:17:43,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412873652] [2024-06-27 18:17:43,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:43,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:17:43,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:43,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:17:43,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:17:43,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:17:43,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 156 transitions, 1248 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 18:17:43,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:43,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:17:43,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:44,968 INFO L124 PetriNetUnfolderBase]: 4686/7573 cut-off events. [2024-06-27 18:17:44,968 INFO L125 PetriNetUnfolderBase]: For 181684/181709 co-relation queries the response was YES. [2024-06-27 18:17:44,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38596 conditions, 7573 events. 4686/7573 cut-off events. For 181684/181709 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 48567 event pairs, 1468 based on Foata normal form. 5/7380 useless extension candidates. Maximal degree in co-relation 38538. Up to 6469 conditions per place. [2024-06-27 18:17:45,025 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 145 selfloop transitions, 35 changer transitions 0/201 dead transitions. [2024-06-27 18:17:45,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 201 transitions, 1772 flow [2024-06-27 18:17:45,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:17:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:17:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 18:17:45,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5280612244897959 [2024-06-27 18:17:45,028 INFO L175 Difference]: Start difference. First operand has 133 places, 156 transitions, 1248 flow. Second operand 8 states and 207 transitions. [2024-06-27 18:17:45,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 201 transitions, 1772 flow [2024-06-27 18:17:45,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 201 transitions, 1726 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 18:17:45,139 INFO L231 Difference]: Finished difference. Result has 138 places, 158 transitions, 1333 flow [2024-06-27 18:17:45,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1333, PETRI_PLACES=138, PETRI_TRANSITIONS=158} [2024-06-27 18:17:45,140 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-27 18:17:45,140 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 158 transitions, 1333 flow [2024-06-27 18:17:45,140 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 18:17:45,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:45,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:45,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:17:45,140 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 18:17:45,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:45,141 INFO L85 PathProgramCache]: Analyzing trace with hash -338397254, now seen corresponding path program 5 times [2024-06-27 18:17:45,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:45,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561887709] [2024-06-27 18:17:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:45,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:45,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:45,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561887709] [2024-06-27 18:17:45,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561887709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:45,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:45,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:45,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463779129] [2024-06-27 18:17:45,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:45,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:45,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:45,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:45,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:45,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:45,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 158 transitions, 1333 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 18:17:45,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:45,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:45,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:47,337 INFO L124 PetriNetUnfolderBase]: 4982/7890 cut-off events. [2024-06-27 18:17:47,338 INFO L125 PetriNetUnfolderBase]: For 196098/196098 co-relation queries the response was YES. [2024-06-27 18:17:47,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41051 conditions, 7890 events. 4982/7890 cut-off events. For 196098/196098 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 49432 event pairs, 1419 based on Foata normal form. 4/7711 useless extension candidates. Maximal degree in co-relation 40992. Up to 6332 conditions per place. [2024-06-27 18:17:47,409 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 127 selfloop transitions, 80 changer transitions 0/217 dead transitions. [2024-06-27 18:17:47,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 217 transitions, 2089 flow [2024-06-27 18:17:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:17:47,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351473922902494 [2024-06-27 18:17:47,424 INFO L175 Difference]: Start difference. First operand has 138 places, 158 transitions, 1333 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:17:47,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 217 transitions, 2089 flow [2024-06-27 18:17:47,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 217 transitions, 1976 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:47,572 INFO L231 Difference]: Finished difference. Result has 141 places, 161 transitions, 1450 flow [2024-06-27 18:17:47,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1450, PETRI_PLACES=141, PETRI_TRANSITIONS=161} [2024-06-27 18:17:47,573 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-27 18:17:47,573 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 161 transitions, 1450 flow [2024-06-27 18:17:47,574 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 18:17:47,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:47,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:47,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:17:47,574 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 18:17:47,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash -338217764, now seen corresponding path program 6 times [2024-06-27 18:17:47,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:47,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654208862] [2024-06-27 18:17:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:47,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:48,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:48,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654208862] [2024-06-27 18:17:48,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654208862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:48,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:48,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287108230] [2024-06-27 18:17:48,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:48,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:48,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:48,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:48,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 161 transitions, 1450 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 18:17:48,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:48,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:48,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:49,851 INFO L124 PetriNetUnfolderBase]: 5084/8050 cut-off events. [2024-06-27 18:17:49,851 INFO L125 PetriNetUnfolderBase]: For 211402/211402 co-relation queries the response was YES. [2024-06-27 18:17:49,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42868 conditions, 8050 events. 5084/8050 cut-off events. For 211402/211402 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 50513 event pairs, 1423 based on Foata normal form. 4/7871 useless extension candidates. Maximal degree in co-relation 42808. Up to 6418 conditions per place. [2024-06-27 18:17:49,918 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 131 selfloop transitions, 84 changer transitions 0/225 dead transitions. [2024-06-27 18:17:49,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 225 transitions, 2442 flow [2024-06-27 18:17:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-27 18:17:49,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5419501133786848 [2024-06-27 18:17:49,936 INFO L175 Difference]: Start difference. First operand has 141 places, 161 transitions, 1450 flow. Second operand 9 states and 239 transitions. [2024-06-27 18:17:49,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 225 transitions, 2442 flow [2024-06-27 18:17:50,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 225 transitions, 2172 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 18:17:50,080 INFO L231 Difference]: Finished difference. Result has 143 places, 167 transitions, 1492 flow [2024-06-27 18:17:50,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1492, PETRI_PLACES=143, PETRI_TRANSITIONS=167} [2024-06-27 18:17:50,080 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-06-27 18:17:50,081 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 167 transitions, 1492 flow [2024-06-27 18:17:50,081 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 18:17:50,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:50,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:50,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:17:50,081 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 18:17:50,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:50,082 INFO L85 PathProgramCache]: Analyzing trace with hash -110323124, now seen corresponding path program 7 times [2024-06-27 18:17:50,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:50,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942410514] [2024-06-27 18:17:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:50,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:50,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:50,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942410514] [2024-06-27 18:17:50,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942410514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:50,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:50,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:50,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515859132] [2024-06-27 18:17:50,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:50,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:50,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:50,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:50,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:50,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:50,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 167 transitions, 1492 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 18:17:50,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:50,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:50,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:52,272 INFO L124 PetriNetUnfolderBase]: 5130/8156 cut-off events. [2024-06-27 18:17:52,272 INFO L125 PetriNetUnfolderBase]: For 216822/216822 co-relation queries the response was YES. [2024-06-27 18:17:52,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43168 conditions, 8156 events. 5130/8156 cut-off events. For 216822/216822 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 51655 event pairs, 1422 based on Foata normal form. 4/7964 useless extension candidates. Maximal degree in co-relation 43107. Up to 6457 conditions per place. [2024-06-27 18:17:52,344 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 128 selfloop transitions, 90 changer transitions 0/228 dead transitions. [2024-06-27 18:17:52,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 228 transitions, 2420 flow [2024-06-27 18:17:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:52,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 18:17:52,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-27 18:17:52,346 INFO L175 Difference]: Start difference. First operand has 143 places, 167 transitions, 1492 flow. Second operand 9 states and 237 transitions. [2024-06-27 18:17:52,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 228 transitions, 2420 flow [2024-06-27 18:17:52,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 228 transitions, 2235 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 18:17:52,470 INFO L231 Difference]: Finished difference. Result has 147 places, 170 transitions, 1553 flow [2024-06-27 18:17:52,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1553, PETRI_PLACES=147, PETRI_TRANSITIONS=170} [2024-06-27 18:17:52,470 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-27 18:17:52,471 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 170 transitions, 1553 flow [2024-06-27 18:17:52,471 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 18:17:52,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:52,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:52,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:17:52,471 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 18:17:52,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash -338224274, now seen corresponding path program 8 times [2024-06-27 18:17:52,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:52,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821560984] [2024-06-27 18:17:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:52,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:53,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:53,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821560984] [2024-06-27 18:17:53,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821560984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:53,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:53,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:53,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171975669] [2024-06-27 18:17:53,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:53,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:53,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:53,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:53,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:53,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:53,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 170 transitions, 1553 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 18:17:53,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:53,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:53,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:54,846 INFO L124 PetriNetUnfolderBase]: 5120/8118 cut-off events. [2024-06-27 18:17:54,846 INFO L125 PetriNetUnfolderBase]: For 222563/222563 co-relation queries the response was YES. [2024-06-27 18:17:54,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42975 conditions, 8118 events. 5120/8118 cut-off events. For 222563/222563 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 51078 event pairs, 1430 based on Foata normal form. 4/7939 useless extension candidates. Maximal degree in co-relation 42913. Up to 6449 conditions per place. [2024-06-27 18:17:54,915 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 131 selfloop transitions, 86 changer transitions 0/227 dead transitions. [2024-06-27 18:17:54,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 227 transitions, 2281 flow [2024-06-27 18:17:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-27 18:17:54,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5419501133786848 [2024-06-27 18:17:54,917 INFO L175 Difference]: Start difference. First operand has 147 places, 170 transitions, 1553 flow. Second operand 9 states and 239 transitions. [2024-06-27 18:17:54,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 227 transitions, 2281 flow [2024-06-27 18:17:55,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 227 transitions, 2017 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 18:17:55,095 INFO L231 Difference]: Finished difference. Result has 149 places, 170 transitions, 1469 flow [2024-06-27 18:17:55,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1469, PETRI_PLACES=149, PETRI_TRANSITIONS=170} [2024-06-27 18:17:55,096 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2024-06-27 18:17:55,096 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 170 transitions, 1469 flow [2024-06-27 18:17:55,096 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 18:17:55,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:55,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:55,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:17:55,096 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 18:17:55,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:55,097 INFO L85 PathProgramCache]: Analyzing trace with hash -110316614, now seen corresponding path program 9 times [2024-06-27 18:17:55,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:55,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646010440] [2024-06-27 18:17:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:55,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:55,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:55,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646010440] [2024-06-27 18:17:55,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646010440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:55,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:55,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:55,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637403198] [2024-06-27 18:17:55,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:55,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:55,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:55,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:55,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:56,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:56,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 170 transitions, 1469 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 18:17:56,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:56,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:56,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:57,320 INFO L124 PetriNetUnfolderBase]: 5166/8154 cut-off events. [2024-06-27 18:17:57,321 INFO L125 PetriNetUnfolderBase]: For 229146/229146 co-relation queries the response was YES. [2024-06-27 18:17:57,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43140 conditions, 8154 events. 5166/8154 cut-off events. For 229146/229146 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 51050 event pairs, 1398 based on Foata normal form. 4/7990 useless extension candidates. Maximal degree in co-relation 43077. Up to 6488 conditions per place. [2024-06-27 18:17:57,390 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 127 selfloop transitions, 92 changer transitions 0/229 dead transitions. [2024-06-27 18:17:57,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 229 transitions, 2260 flow [2024-06-27 18:17:57,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:17:57,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351473922902494 [2024-06-27 18:17:57,392 INFO L175 Difference]: Start difference. First operand has 149 places, 170 transitions, 1469 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:17:57,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 229 transitions, 2260 flow [2024-06-27 18:17:57,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 229 transitions, 2046 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:17:57,542 INFO L231 Difference]: Finished difference. Result has 149 places, 173 transitions, 1504 flow [2024-06-27 18:17:57,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1504, PETRI_PLACES=149, PETRI_TRANSITIONS=173} [2024-06-27 18:17:57,543 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2024-06-27 18:17:57,543 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 173 transitions, 1504 flow [2024-06-27 18:17:57,543 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 18:17:57,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:57,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:57,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:17:57,544 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:57,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash -102042404, now seen corresponding path program 10 times [2024-06-27 18:17:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:57,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736929662] [2024-06-27 18:17:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:58,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:58,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736929662] [2024-06-27 18:17:58,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736929662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:58,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:58,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:17:58,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528824724] [2024-06-27 18:17:58,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:58,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:17:58,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:17:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:17:58,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:17:58,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 173 transitions, 1504 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 18:17:58,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:58,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:17:58,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:59,879 INFO L124 PetriNetUnfolderBase]: 5156/8167 cut-off events. [2024-06-27 18:17:59,879 INFO L125 PetriNetUnfolderBase]: For 234789/234789 co-relation queries the response was YES. [2024-06-27 18:17:59,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43133 conditions, 8167 events. 5156/8167 cut-off events. For 234789/234789 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 51400 event pairs, 1411 based on Foata normal form. 4/7993 useless extension candidates. Maximal degree in co-relation 43069. Up to 6480 conditions per place. [2024-06-27 18:17:59,951 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 117 selfloop transitions, 99 changer transitions 0/226 dead transitions. [2024-06-27 18:17:59,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 226 transitions, 2076 flow [2024-06-27 18:17:59,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:17:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:17:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 18:17:59,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 18:17:59,953 INFO L175 Difference]: Start difference. First operand has 149 places, 173 transitions, 1504 flow. Second operand 9 states and 231 transitions. [2024-06-27 18:17:59,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 226 transitions, 2076 flow [2024-06-27 18:18:00,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 226 transitions, 1840 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 18:18:00,104 INFO L231 Difference]: Finished difference. Result has 152 places, 173 transitions, 1474 flow [2024-06-27 18:18:00,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1474, PETRI_PLACES=152, PETRI_TRANSITIONS=173} [2024-06-27 18:18:00,105 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-27 18:18:00,106 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 173 transitions, 1474 flow [2024-06-27 18:18:00,106 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 18:18:00,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:00,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:00,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:18:00,106 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 18:18:00,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:00,107 INFO L85 PathProgramCache]: Analyzing trace with hash -296487286, now seen corresponding path program 2 times [2024-06-27 18:18:00,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:00,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068036237] [2024-06-27 18:18:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:00,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:00,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:00,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068036237] [2024-06-27 18:18:00,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068036237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:00,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:00,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:18:00,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543140150] [2024-06-27 18:18:00,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:00,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:18:00,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:18:00,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:18:00,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:18:00,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 173 transitions, 1474 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 18:18:00,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:00,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:18:00,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:01,837 INFO L124 PetriNetUnfolderBase]: 4449/7239 cut-off events. [2024-06-27 18:18:01,838 INFO L125 PetriNetUnfolderBase]: For 235314/235369 co-relation queries the response was YES. [2024-06-27 18:18:01,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39144 conditions, 7239 events. 4449/7239 cut-off events. For 235314/235369 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 47560 event pairs, 1594 based on Foata normal form. 3/7053 useless extension candidates. Maximal degree in co-relation 39079. Up to 6269 conditions per place. [2024-06-27 18:18:01,905 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 143 selfloop transitions, 20 changer transitions 0/195 dead transitions. [2024-06-27 18:18:01,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 195 transitions, 1888 flow [2024-06-27 18:18:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:18:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:18:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:18:01,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-27 18:18:01,907 INFO L175 Difference]: Start difference. First operand has 152 places, 173 transitions, 1474 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:18:01,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 195 transitions, 1888 flow [2024-06-27 18:18:02,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 195 transitions, 1666 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 18:18:02,074 INFO L231 Difference]: Finished difference. Result has 149 places, 176 transitions, 1342 flow [2024-06-27 18:18:02,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1342, PETRI_PLACES=149, PETRI_TRANSITIONS=176} [2024-06-27 18:18:02,075 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2024-06-27 18:18:02,075 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 176 transitions, 1342 flow [2024-06-27 18:18:02,075 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 18:18:02,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:02,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:02,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:18:02,076 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 18:18:02,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:02,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1129568352, now seen corresponding path program 1 times [2024-06-27 18:18:02,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:02,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740010392] [2024-06-27 18:18:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:02,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:02,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:02,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740010392] [2024-06-27 18:18:02,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740010392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:02,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:02,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:18:02,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465661064] [2024-06-27 18:18:02,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:02,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:18:02,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:02,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:18:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:18:02,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:18:02,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 176 transitions, 1342 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 18:18:02,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:02,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:18:02,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:03,559 INFO L124 PetriNetUnfolderBase]: 4322/7139 cut-off events. [2024-06-27 18:18:03,559 INFO L125 PetriNetUnfolderBase]: For 211290/211316 co-relation queries the response was YES. [2024-06-27 18:18:03,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37255 conditions, 7139 events. 4322/7139 cut-off events. For 211290/211316 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 47091 event pairs, 1413 based on Foata normal form. 3/7017 useless extension candidates. Maximal degree in co-relation 37189. Up to 6118 conditions per place. [2024-06-27 18:18:03,625 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 168 selfloop transitions, 13 changer transitions 0/203 dead transitions. [2024-06-27 18:18:03,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 203 transitions, 1822 flow [2024-06-27 18:18:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:18:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:18:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:18:03,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-27 18:18:03,627 INFO L175 Difference]: Start difference. First operand has 149 places, 176 transitions, 1342 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:18:03,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 203 transitions, 1822 flow [2024-06-27 18:18:03,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 203 transitions, 1754 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 18:18:03,857 INFO L231 Difference]: Finished difference. Result has 152 places, 183 transitions, 1393 flow [2024-06-27 18:18:03,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1393, PETRI_PLACES=152, PETRI_TRANSITIONS=183} [2024-06-27 18:18:03,858 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-27 18:18:03,859 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 183 transitions, 1393 flow [2024-06-27 18:18:03,859 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 18:18:03,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:03,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:03,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:18:03,859 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:03,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:03,860 INFO L85 PathProgramCache]: Analyzing trace with hash -101734574, now seen corresponding path program 1 times [2024-06-27 18:18:03,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:03,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692378545] [2024-06-27 18:18:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:03,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:05,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692378545] [2024-06-27 18:18:05,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692378545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:05,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:05,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:05,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235315014] [2024-06-27 18:18:05,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:05,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:05,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:05,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:05,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:05,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:18:05,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 183 transitions, 1393 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:05,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:05,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:18:05,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:06,471 INFO L124 PetriNetUnfolderBase]: 4551/7409 cut-off events. [2024-06-27 18:18:06,471 INFO L125 PetriNetUnfolderBase]: For 220833/220833 co-relation queries the response was YES. [2024-06-27 18:18:06,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39221 conditions, 7409 events. 4551/7409 cut-off events. For 220833/220833 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 48012 event pairs, 1382 based on Foata normal form. 4/7286 useless extension candidates. Maximal degree in co-relation 39153. Up to 6404 conditions per place. [2024-06-27 18:18:06,545 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 202 selfloop transitions, 25 changer transitions 0/238 dead transitions. [2024-06-27 18:18:06,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 238 transitions, 2053 flow [2024-06-27 18:18:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 18:18:06,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-27 18:18:06,546 INFO L175 Difference]: Start difference. First operand has 152 places, 183 transitions, 1393 flow. Second operand 9 states and 228 transitions. [2024-06-27 18:18:06,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 238 transitions, 2053 flow [2024-06-27 18:18:06,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 238 transitions, 2000 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 18:18:06,712 INFO L231 Difference]: Finished difference. Result has 159 places, 188 transitions, 1475 flow [2024-06-27 18:18:06,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1475, PETRI_PLACES=159, PETRI_TRANSITIONS=188} [2024-06-27 18:18:06,713 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-27 18:18:06,713 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 188 transitions, 1475 flow [2024-06-27 18:18:06,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:06,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:06,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:06,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:18:06,714 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 18:18:06,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1137216672, now seen corresponding path program 2 times [2024-06-27 18:18:06,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:06,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313770655] [2024-06-27 18:18:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:06,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:07,383 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 18:18:07,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:07,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313770655] [2024-06-27 18:18:07,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313770655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:07,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:07,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:18:07,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353974678] [2024-06-27 18:18:07,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:07,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:18:07,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:18:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:18:07,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:18:07,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 188 transitions, 1475 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 18:18:07,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:07,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:18:07,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:08,344 INFO L124 PetriNetUnfolderBase]: 4316/7344 cut-off events. [2024-06-27 18:18:08,344 INFO L125 PetriNetUnfolderBase]: For 228587/228621 co-relation queries the response was YES. [2024-06-27 18:18:08,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39041 conditions, 7344 events. 4316/7344 cut-off events. For 228587/228621 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 50092 event pairs, 1351 based on Foata normal form. 9/7170 useless extension candidates. Maximal degree in co-relation 38971. Up to 6089 conditions per place. [2024-06-27 18:18:08,416 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 170 selfloop transitions, 18 changer transitions 0/210 dead transitions. [2024-06-27 18:18:08,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 210 transitions, 1951 flow [2024-06-27 18:18:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:18:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:18:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:18:08,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-27 18:18:08,417 INFO L175 Difference]: Start difference. First operand has 159 places, 188 transitions, 1475 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:18:08,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 210 transitions, 1951 flow [2024-06-27 18:18:08,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 210 transitions, 1856 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 18:18:08,589 INFO L231 Difference]: Finished difference. Result has 159 places, 191 transitions, 1474 flow [2024-06-27 18:18:08,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1380, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1474, PETRI_PLACES=159, PETRI_TRANSITIONS=191} [2024-06-27 18:18:08,590 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-27 18:18:08,590 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 191 transitions, 1474 flow [2024-06-27 18:18:08,590 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 18:18:08,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:08,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:08,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:18:08,591 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:08,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:08,591 INFO L85 PathProgramCache]: Analyzing trace with hash 313660278, now seen corresponding path program 1 times [2024-06-27 18:18:08,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:08,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574365585] [2024-06-27 18:18:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:08,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:09,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:09,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574365585] [2024-06-27 18:18:09,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574365585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:09,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:09,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:09,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997194435] [2024-06-27 18:18:09,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:09,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:09,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:09,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:09,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:09,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:18:09,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 191 transitions, 1474 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 18:18:09,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:09,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:18:09,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:10,983 INFO L124 PetriNetUnfolderBase]: 5253/8332 cut-off events. [2024-06-27 18:18:10,983 INFO L125 PetriNetUnfolderBase]: For 289973/289973 co-relation queries the response was YES. [2024-06-27 18:18:11,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46767 conditions, 8332 events. 5253/8332 cut-off events. For 289973/289973 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 53146 event pairs, 1234 based on Foata normal form. 4/8179 useless extension candidates. Maximal degree in co-relation 46696. Up to 7191 conditions per place. [2024-06-27 18:18:11,062 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 220 selfloop transitions, 33 changer transitions 0/263 dead transitions. [2024-06-27 18:18:11,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 263 transitions, 2430 flow [2024-06-27 18:18:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:18:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:18:11,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 18:18:11,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-27 18:18:11,064 INFO L175 Difference]: Start difference. First operand has 159 places, 191 transitions, 1474 flow. Second operand 10 states and 255 transitions. [2024-06-27 18:18:11,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 263 transitions, 2430 flow [2024-06-27 18:18:11,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 263 transitions, 2358 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 18:18:11,273 INFO L231 Difference]: Finished difference. Result has 165 places, 195 transitions, 1579 flow [2024-06-27 18:18:11,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1579, PETRI_PLACES=165, PETRI_TRANSITIONS=195} [2024-06-27 18:18:11,274 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-06-27 18:18:11,274 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 195 transitions, 1579 flow [2024-06-27 18:18:11,274 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 18:18:11,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:11,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:11,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:18:11,275 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:11,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:11,275 INFO L85 PathProgramCache]: Analyzing trace with hash 402226038, now seen corresponding path program 2 times [2024-06-27 18:18:11,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:11,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745179377] [2024-06-27 18:18:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:11,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:12,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:12,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745179377] [2024-06-27 18:18:12,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745179377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:12,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:12,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:12,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967268976] [2024-06-27 18:18:12,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:12,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:12,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:12,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:12,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:18:12,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 195 transitions, 1579 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 18:18:12,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:12,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:18:12,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:13,528 INFO L124 PetriNetUnfolderBase]: 5290/8325 cut-off events. [2024-06-27 18:18:13,529 INFO L125 PetriNetUnfolderBase]: For 305124/305124 co-relation queries the response was YES. [2024-06-27 18:18:13,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47807 conditions, 8325 events. 5290/8325 cut-off events. For 305124/305124 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 52626 event pairs, 1599 based on Foata normal form. 4/8187 useless extension candidates. Maximal degree in co-relation 47735. Up to 7353 conditions per place. [2024-06-27 18:18:13,607 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 216 selfloop transitions, 30 changer transitions 0/256 dead transitions. [2024-06-27 18:18:13,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 256 transitions, 2453 flow [2024-06-27 18:18:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 18:18:13,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215419501133787 [2024-06-27 18:18:13,608 INFO L175 Difference]: Start difference. First operand has 165 places, 195 transitions, 1579 flow. Second operand 9 states and 230 transitions. [2024-06-27 18:18:13,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 256 transitions, 2453 flow [2024-06-27 18:18:13,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 256 transitions, 2342 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 18:18:13,847 INFO L231 Difference]: Finished difference. Result has 168 places, 197 transitions, 1589 flow [2024-06-27 18:18:13,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1589, PETRI_PLACES=168, PETRI_TRANSITIONS=197} [2024-06-27 18:18:13,848 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-06-27 18:18:13,848 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 197 transitions, 1589 flow [2024-06-27 18:18:13,848 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 18:18:13,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:13,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:13,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:18:13,849 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:13,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:13,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1436018806, now seen corresponding path program 3 times [2024-06-27 18:18:13,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:13,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444997312] [2024-06-27 18:18:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:13,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:14,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:14,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444997312] [2024-06-27 18:18:14,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444997312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:14,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:14,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:14,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717158925] [2024-06-27 18:18:14,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:14,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:14,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:14,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:14,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:14,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:18:14,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 197 transitions, 1589 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 18:18:14,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:14,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:18:14,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:16,086 INFO L124 PetriNetUnfolderBase]: 5282/8326 cut-off events. [2024-06-27 18:18:16,086 INFO L125 PetriNetUnfolderBase]: For 309519/309519 co-relation queries the response was YES. [2024-06-27 18:18:16,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47470 conditions, 8326 events. 5282/8326 cut-off events. For 309519/309519 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 52761 event pairs, 1610 based on Foata normal form. 4/8185 useless extension candidates. Maximal degree in co-relation 47396. Up to 7424 conditions per place. [2024-06-27 18:18:16,163 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 216 selfloop transitions, 27 changer transitions 0/253 dead transitions. [2024-06-27 18:18:16,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 253 transitions, 2225 flow [2024-06-27 18:18:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 18:18:16,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124716553287982 [2024-06-27 18:18:16,164 INFO L175 Difference]: Start difference. First operand has 168 places, 197 transitions, 1589 flow. Second operand 9 states and 226 transitions. [2024-06-27 18:18:16,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 253 transitions, 2225 flow [2024-06-27 18:18:16,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 253 transitions, 2105 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 18:18:16,416 INFO L231 Difference]: Finished difference. Result has 170 places, 197 transitions, 1530 flow [2024-06-27 18:18:16,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1530, PETRI_PLACES=170, PETRI_TRANSITIONS=197} [2024-06-27 18:18:16,417 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-27 18:18:16,417 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 197 transitions, 1530 flow [2024-06-27 18:18:16,417 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 18:18:16,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:16,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:16,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:18:16,418 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:16,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:16,418 INFO L85 PathProgramCache]: Analyzing trace with hash -150513744, now seen corresponding path program 4 times [2024-06-27 18:18:16,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:16,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470074369] [2024-06-27 18:18:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:16,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:17,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:17,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470074369] [2024-06-27 18:18:17,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470074369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:17,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:17,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:17,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356472276] [2024-06-27 18:18:17,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:17,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:17,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:17,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:17,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:18:17,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 197 transitions, 1530 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 18:18:17,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:17,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:18:17,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:18,886 INFO L124 PetriNetUnfolderBase]: 5319/8385 cut-off events. [2024-06-27 18:18:18,887 INFO L125 PetriNetUnfolderBase]: For 320386/320389 co-relation queries the response was YES. [2024-06-27 18:18:18,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47769 conditions, 8385 events. 5319/8385 cut-off events. For 320386/320389 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 53186 event pairs, 1585 based on Foata normal form. 6/8244 useless extension candidates. Maximal degree in co-relation 47694. Up to 7241 conditions per place. [2024-06-27 18:18:18,959 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 183 selfloop transitions, 61 changer transitions 0/254 dead transitions. [2024-06-27 18:18:18,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 254 transitions, 2234 flow [2024-06-27 18:18:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 18:18:18,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215419501133787 [2024-06-27 18:18:18,960 INFO L175 Difference]: Start difference. First operand has 170 places, 197 transitions, 1530 flow. Second operand 9 states and 230 transitions. [2024-06-27 18:18:18,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 254 transitions, 2234 flow [2024-06-27 18:18:19,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 254 transitions, 2175 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 18:18:19,200 INFO L231 Difference]: Finished difference. Result has 171 places, 199 transitions, 1658 flow [2024-06-27 18:18:19,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1658, PETRI_PLACES=171, PETRI_TRANSITIONS=199} [2024-06-27 18:18:19,201 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2024-06-27 18:18:19,201 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 199 transitions, 1658 flow [2024-06-27 18:18:19,201 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 18:18:19,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:19,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:19,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:18:19,201 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:19,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:19,202 INFO L85 PathProgramCache]: Analyzing trace with hash -318567118, now seen corresponding path program 5 times [2024-06-27 18:18:19,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:19,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069085858] [2024-06-27 18:18:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:19,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:20,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:20,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069085858] [2024-06-27 18:18:20,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069085858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:20,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:20,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:20,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823041916] [2024-06-27 18:18:20,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:20,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:20,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:20,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:20,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:20,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:18:20,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 199 transitions, 1658 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 18:18:20,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:20,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:18:20,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:21,710 INFO L124 PetriNetUnfolderBase]: 5356/8449 cut-off events. [2024-06-27 18:18:21,710 INFO L125 PetriNetUnfolderBase]: For 337244/337247 co-relation queries the response was YES. [2024-06-27 18:18:21,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49081 conditions, 8449 events. 5356/8449 cut-off events. For 337244/337247 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 53702 event pairs, 1600 based on Foata normal form. 6/8306 useless extension candidates. Maximal degree in co-relation 49005. Up to 7296 conditions per place. [2024-06-27 18:18:21,781 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 186 selfloop transitions, 60 changer transitions 0/256 dead transitions. [2024-06-27 18:18:21,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 256 transitions, 2370 flow [2024-06-27 18:18:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:21,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 18:18:21,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 18:18:21,783 INFO L175 Difference]: Start difference. First operand has 171 places, 199 transitions, 1658 flow. Second operand 9 states and 231 transitions. [2024-06-27 18:18:21,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 256 transitions, 2370 flow [2024-06-27 18:18:22,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 256 transitions, 2201 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 18:18:22,029 INFO L231 Difference]: Finished difference. Result has 173 places, 201 transitions, 1678 flow [2024-06-27 18:18:22,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1678, PETRI_PLACES=173, PETRI_TRANSITIONS=201} [2024-06-27 18:18:22,030 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 118 predicate places. [2024-06-27 18:18:22,030 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 201 transitions, 1678 flow [2024-06-27 18:18:22,030 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 18:18:22,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:22,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:22,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:18:22,031 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:22,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash 714929910, now seen corresponding path program 6 times [2024-06-27 18:18:22,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:22,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271959500] [2024-06-27 18:18:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:22,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:22,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:22,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271959500] [2024-06-27 18:18:22,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271959500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:22,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:22,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:22,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785056502] [2024-06-27 18:18:22,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:22,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:22,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:22,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:23,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:18:23,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 201 transitions, 1678 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 18:18:23,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:23,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:18:23,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:24,559 INFO L124 PetriNetUnfolderBase]: 5393/8484 cut-off events. [2024-06-27 18:18:24,559 INFO L125 PetriNetUnfolderBase]: For 351850/351853 co-relation queries the response was YES. [2024-06-27 18:18:24,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49833 conditions, 8484 events. 5393/8484 cut-off events. For 351850/351853 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 53682 event pairs, 1585 based on Foata normal form. 6/8347 useless extension candidates. Maximal degree in co-relation 49756. Up to 7240 conditions per place. [2024-06-27 18:18:24,632 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 184 selfloop transitions, 65 changer transitions 0/259 dead transitions. [2024-06-27 18:18:24,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 259 transitions, 2402 flow [2024-06-27 18:18:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:18:24,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260770975056689 [2024-06-27 18:18:24,634 INFO L175 Difference]: Start difference. First operand has 173 places, 201 transitions, 1678 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:18:24,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 259 transitions, 2402 flow [2024-06-27 18:18:24,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 259 transitions, 2231 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 18:18:24,908 INFO L231 Difference]: Finished difference. Result has 175 places, 203 transitions, 1710 flow [2024-06-27 18:18:24,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1710, PETRI_PLACES=175, PETRI_TRANSITIONS=203} [2024-06-27 18:18:24,908 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2024-06-27 18:18:24,909 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 203 transitions, 1710 flow [2024-06-27 18:18:24,909 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 18:18:24,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:24,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:24,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:18:24,909 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 18:18:24,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:24,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1702317579, now seen corresponding path program 1 times [2024-06-27 18:18:24,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:24,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130061408] [2024-06-27 18:18:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:24,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:25,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:25,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130061408] [2024-06-27 18:18:25,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130061408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:25,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:25,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:18:25,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904341129] [2024-06-27 18:18:25,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:25,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:18:25,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:18:25,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:18:25,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:18:25,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 203 transitions, 1710 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:25,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:25,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:18:25,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:27,009 INFO L124 PetriNetUnfolderBase]: 4654/7622 cut-off events. [2024-06-27 18:18:27,009 INFO L125 PetriNetUnfolderBase]: For 353869/353896 co-relation queries the response was YES. [2024-06-27 18:18:27,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45517 conditions, 7622 events. 4654/7622 cut-off events. For 353869/353896 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 50720 event pairs, 1548 based on Foata normal form. 8/7425 useless extension candidates. Maximal degree in co-relation 45439. Up to 6528 conditions per place. [2024-06-27 18:18:27,085 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 178 selfloop transitions, 18 changer transitions 0/234 dead transitions. [2024-06-27 18:18:27,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 234 transitions, 2216 flow [2024-06-27 18:18:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:18:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:18:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:18:27,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5189504373177842 [2024-06-27 18:18:27,086 INFO L175 Difference]: Start difference. First operand has 175 places, 203 transitions, 1710 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:18:27,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 234 transitions, 2216 flow [2024-06-27 18:18:27,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 234 transitions, 2031 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 18:18:27,339 INFO L231 Difference]: Finished difference. Result has 175 places, 206 transitions, 1611 flow [2024-06-27 18:18:27,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1611, PETRI_PLACES=175, PETRI_TRANSITIONS=206} [2024-06-27 18:18:27,339 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2024-06-27 18:18:27,339 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 206 transitions, 1611 flow [2024-06-27 18:18:27,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:27,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:27,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:27,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:18:27,340 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 18:18:27,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1900384254, now seen corresponding path program 7 times [2024-06-27 18:18:27,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:27,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785895029] [2024-06-27 18:18:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:27,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:28,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785895029] [2024-06-27 18:18:28,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785895029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:28,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:28,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:28,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747283246] [2024-06-27 18:18:28,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:28,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:28,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:18:28,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 206 transitions, 1611 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 18:18:28,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:28,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:18:28,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:30,002 INFO L124 PetriNetUnfolderBase]: 5464/8605 cut-off events. [2024-06-27 18:18:30,002 INFO L125 PetriNetUnfolderBase]: For 376734/376734 co-relation queries the response was YES. [2024-06-27 18:18:30,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51215 conditions, 8605 events. 5464/8605 cut-off events. For 376734/376734 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 54608 event pairs, 1602 based on Foata normal form. 4/8460 useless extension candidates. Maximal degree in co-relation 51136. Up to 7452 conditions per place. [2024-06-27 18:18:30,095 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 188 selfloop transitions, 61 changer transitions 0/259 dead transitions. [2024-06-27 18:18:30,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 259 transitions, 2321 flow [2024-06-27 18:18:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 18:18:30,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147392290249433 [2024-06-27 18:18:30,096 INFO L175 Difference]: Start difference. First operand has 175 places, 206 transitions, 1611 flow. Second operand 9 states and 227 transitions. [2024-06-27 18:18:30,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 259 transitions, 2321 flow [2024-06-27 18:18:30,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 259 transitions, 2257 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 18:18:30,464 INFO L231 Difference]: Finished difference. Result has 179 places, 208 transitions, 1746 flow [2024-06-27 18:18:30,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1746, PETRI_PLACES=179, PETRI_TRANSITIONS=208} [2024-06-27 18:18:30,465 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2024-06-27 18:18:30,465 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 208 transitions, 1746 flow [2024-06-27 18:18:30,465 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 18:18:30,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:30,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:30,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:18:30,466 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:30,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:30,466 INFO L85 PathProgramCache]: Analyzing trace with hash 867069152, now seen corresponding path program 8 times [2024-06-27 18:18:30,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:30,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475181701] [2024-06-27 18:18:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:30,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:31,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:31,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475181701] [2024-06-27 18:18:31,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475181701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:31,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:31,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:31,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644276622] [2024-06-27 18:18:31,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:31,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:31,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:31,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:18:31,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 208 transitions, 1746 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 18:18:31,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:31,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:18:31,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:32,994 INFO L124 PetriNetUnfolderBase]: 5501/8676 cut-off events. [2024-06-27 18:18:32,994 INFO L125 PetriNetUnfolderBase]: For 396097/396097 co-relation queries the response was YES. [2024-06-27 18:18:33,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52559 conditions, 8676 events. 5501/8676 cut-off events. For 396097/396097 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 55253 event pairs, 1611 based on Foata normal form. 4/8526 useless extension candidates. Maximal degree in co-relation 52479. Up to 7507 conditions per place. [2024-06-27 18:18:33,085 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 188 selfloop transitions, 63 changer transitions 0/261 dead transitions. [2024-06-27 18:18:33,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 261 transitions, 2464 flow [2024-06-27 18:18:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 18:18:33,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124716553287982 [2024-06-27 18:18:33,086 INFO L175 Difference]: Start difference. First operand has 179 places, 208 transitions, 1746 flow. Second operand 9 states and 226 transitions. [2024-06-27 18:18:33,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 261 transitions, 2464 flow [2024-06-27 18:18:33,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 261 transitions, 2283 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 18:18:33,395 INFO L231 Difference]: Finished difference. Result has 181 places, 210 transitions, 1772 flow [2024-06-27 18:18:33,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1772, PETRI_PLACES=181, PETRI_TRANSITIONS=210} [2024-06-27 18:18:33,396 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 126 predicate places. [2024-06-27 18:18:33,396 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 210 transitions, 1772 flow [2024-06-27 18:18:33,396 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 18:18:33,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:33,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:33,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:18:33,397 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:33,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1908409452, now seen corresponding path program 9 times [2024-06-27 18:18:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:33,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473505641] [2024-06-27 18:18:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:33,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:34,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:34,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473505641] [2024-06-27 18:18:34,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473505641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:34,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:34,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:34,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2313635] [2024-06-27 18:18:34,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:34,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:34,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:34,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:18:34,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 210 transitions, 1772 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 18:18:34,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:34,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:18:34,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:35,795 INFO L124 PetriNetUnfolderBase]: 5538/8699 cut-off events. [2024-06-27 18:18:35,796 INFO L125 PetriNetUnfolderBase]: For 412373/412373 co-relation queries the response was YES. [2024-06-27 18:18:35,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53326 conditions, 8699 events. 5538/8699 cut-off events. For 412373/412373 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 55109 event pairs, 1598 based on Foata normal form. 4/8558 useless extension candidates. Maximal degree in co-relation 53245. Up to 7411 conditions per place. [2024-06-27 18:18:35,882 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 190 selfloop transitions, 68 changer transitions 0/268 dead transitions. [2024-06-27 18:18:35,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 268 transitions, 2790 flow [2024-06-27 18:18:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 18:18:35,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215419501133787 [2024-06-27 18:18:35,884 INFO L175 Difference]: Start difference. First operand has 181 places, 210 transitions, 1772 flow. Second operand 9 states and 230 transitions. [2024-06-27 18:18:35,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 268 transitions, 2790 flow [2024-06-27 18:18:36,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 268 transitions, 2601 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 18:18:36,278 INFO L231 Difference]: Finished difference. Result has 183 places, 214 transitions, 1878 flow [2024-06-27 18:18:36,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1878, PETRI_PLACES=183, PETRI_TRANSITIONS=214} [2024-06-27 18:18:36,278 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 128 predicate places. [2024-06-27 18:18:36,278 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 214 transitions, 1878 flow [2024-06-27 18:18:36,278 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 18:18:36,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:36,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:36,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:18:36,279 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:36,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:36,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1895021874, now seen corresponding path program 10 times [2024-06-27 18:18:36,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:36,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306000815] [2024-06-27 18:18:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:36,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:37,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:37,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306000815] [2024-06-27 18:18:37,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306000815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:37,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:37,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:18:37,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910878257] [2024-06-27 18:18:37,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:37,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:18:37,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:18:37,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:18:37,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:18:37,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 214 transitions, 1878 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 18:18:37,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:37,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:18:37,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:38,966 INFO L124 PetriNetUnfolderBase]: 5530/8717 cut-off events. [2024-06-27 18:18:38,967 INFO L125 PetriNetUnfolderBase]: For 419829/419829 co-relation queries the response was YES. [2024-06-27 18:18:39,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53244 conditions, 8717 events. 5530/8717 cut-off events. For 419829/419829 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 55587 event pairs, 1615 based on Foata normal form. 4/8568 useless extension candidates. Maximal degree in co-relation 53162. Up to 7550 conditions per place. [2024-06-27 18:18:39,045 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 195 selfloop transitions, 60 changer transitions 0/265 dead transitions. [2024-06-27 18:18:39,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 265 transitions, 2534 flow [2024-06-27 18:18:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:18:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:18:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 18:18:39,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-27 18:18:39,046 INFO L175 Difference]: Start difference. First operand has 183 places, 214 transitions, 1878 flow. Second operand 9 states and 228 transitions. [2024-06-27 18:18:39,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 265 transitions, 2534 flow [2024-06-27 18:18:39,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 265 transitions, 2333 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 18:18:39,384 INFO L231 Difference]: Finished difference. Result has 187 places, 214 transitions, 1804 flow [2024-06-27 18:18:39,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1804, PETRI_PLACES=187, PETRI_TRANSITIONS=214} [2024-06-27 18:18:39,385 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-27 18:18:39,385 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 214 transitions, 1804 flow [2024-06-27 18:18:39,385 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 18:18:39,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:39,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:39,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:18:39,385 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 18:18:39,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:39,386 INFO L85 PathProgramCache]: Analyzing trace with hash 894300299, now seen corresponding path program 2 times [2024-06-27 18:18:39,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:39,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548062933] [2024-06-27 18:18:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:39,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:40,341 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 18:18:40,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:40,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548062933] [2024-06-27 18:18:40,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548062933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:40,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:40,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:18:40,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856042441] [2024-06-27 18:18:40,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:40,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:18:40,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:40,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:18:40,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:18:40,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:18:40,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 214 transitions, 1804 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:40,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:40,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:18:40,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:41,556 INFO L124 PetriNetUnfolderBase]: 4753/8020 cut-off events. [2024-06-27 18:18:41,556 INFO L125 PetriNetUnfolderBase]: For 407373/407395 co-relation queries the response was YES. [2024-06-27 18:18:41,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47882 conditions, 8020 events. 4753/8020 cut-off events. For 407373/407395 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 55518 event pairs, 1561 based on Foata normal form. 13/7760 useless extension candidates. Maximal degree in co-relation 47798. Up to 6607 conditions per place. [2024-06-27 18:18:41,644 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 175 selfloop transitions, 30 changer transitions 0/247 dead transitions. [2024-06-27 18:18:41,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 247 transitions, 2494 flow [2024-06-27 18:18:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:18:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:18:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:18:41,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160349854227405 [2024-06-27 18:18:41,646 INFO L175 Difference]: Start difference. First operand has 187 places, 214 transitions, 1804 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:18:41,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 247 transitions, 2494 flow [2024-06-27 18:18:42,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 247 transitions, 2355 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 18:18:42,060 INFO L231 Difference]: Finished difference. Result has 187 places, 222 transitions, 1848 flow [2024-06-27 18:18:42,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1848, PETRI_PLACES=187, PETRI_TRANSITIONS=222} [2024-06-27 18:18:42,061 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-27 18:18:42,061 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 222 transitions, 1848 flow [2024-06-27 18:18:42,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:42,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:42,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:42,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:18:42,061 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 18:18:42,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:42,062 INFO L85 PathProgramCache]: Analyzing trace with hash 893795309, now seen corresponding path program 3 times [2024-06-27 18:18:42,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:42,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771719700] [2024-06-27 18:18:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:42,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:42,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:42,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771719700] [2024-06-27 18:18:42,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771719700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:42,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:42,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:18:42,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815841743] [2024-06-27 18:18:42,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:42,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:18:42,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:18:42,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:18:43,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:18:43,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 222 transitions, 1848 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:43,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:43,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:18:43,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:44,147 INFO L124 PetriNetUnfolderBase]: 4750/8026 cut-off events. [2024-06-27 18:18:44,147 INFO L125 PetriNetUnfolderBase]: For 421242/421267 co-relation queries the response was YES. [2024-06-27 18:18:44,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48587 conditions, 8026 events. 4750/8026 cut-off events. For 421242/421267 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 55725 event pairs, 1563 based on Foata normal form. 17/7768 useless extension candidates. Maximal degree in co-relation 48501. Up to 6648 conditions per place. [2024-06-27 18:18:44,242 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 182 selfloop transitions, 23 changer transitions 0/247 dead transitions. [2024-06-27 18:18:44,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 247 transitions, 2335 flow [2024-06-27 18:18:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:18:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:18:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:18:44,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-27 18:18:44,244 INFO L175 Difference]: Start difference. First operand has 187 places, 222 transitions, 1848 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:18:44,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 247 transitions, 2335 flow [2024-06-27 18:18:44,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 247 transitions, 2244 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 18:18:44,672 INFO L231 Difference]: Finished difference. Result has 191 places, 223 transitions, 1818 flow [2024-06-27 18:18:44,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1818, PETRI_PLACES=191, PETRI_TRANSITIONS=223} [2024-06-27 18:18:44,672 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2024-06-27 18:18:44,672 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 223 transitions, 1818 flow [2024-06-27 18:18:44,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:44,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:44,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:44,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:18:44,673 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 18:18:44,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash 406547110, now seen corresponding path program 1 times [2024-06-27 18:18:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:44,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002019516] [2024-06-27 18:18:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:44,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:45,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:45,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002019516] [2024-06-27 18:18:45,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002019516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:45,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:45,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:18:45,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117858238] [2024-06-27 18:18:45,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:45,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:18:45,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:18:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:18:45,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:18:45,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 223 transitions, 1818 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 18:18:45,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:45,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:18:45,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:46,664 INFO L124 PetriNetUnfolderBase]: 5175/8370 cut-off events. [2024-06-27 18:18:46,664 INFO L125 PetriNetUnfolderBase]: For 441115/441131 co-relation queries the response was YES. [2024-06-27 18:18:46,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52103 conditions, 8370 events. 5175/8370 cut-off events. For 441115/441131 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 54947 event pairs, 1499 based on Foata normal form. 1/8216 useless extension candidates. Maximal degree in co-relation 52015. Up to 7302 conditions per place. [2024-06-27 18:18:46,760 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 224 selfloop transitions, 17 changer transitions 0/256 dead transitions. [2024-06-27 18:18:46,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 256 transitions, 2455 flow [2024-06-27 18:18:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:18:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:18:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:18:46,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49854227405247814 [2024-06-27 18:18:46,762 INFO L175 Difference]: Start difference. First operand has 191 places, 223 transitions, 1818 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:18:46,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 256 transitions, 2455 flow [2024-06-27 18:18:47,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 256 transitions, 2405 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 18:18:47,126 INFO L231 Difference]: Finished difference. Result has 194 places, 230 transitions, 1916 flow [2024-06-27 18:18:47,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1916, PETRI_PLACES=194, PETRI_TRANSITIONS=230} [2024-06-27 18:18:47,126 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2024-06-27 18:18:47,126 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 230 transitions, 1916 flow [2024-06-27 18:18:47,127 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 18:18:47,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:47,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:47,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:18:47,127 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 18:18:47,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:47,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1696597986, now seen corresponding path program 2 times [2024-06-27 18:18:47,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:47,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203219283] [2024-06-27 18:18:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:47,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:47,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:47,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203219283] [2024-06-27 18:18:47,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203219283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:47,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:47,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:18:47,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175827829] [2024-06-27 18:18:47,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:47,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:18:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:18:47,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:18:47,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:18:47,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 230 transitions, 1916 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 18:18:47,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:47,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:18:47,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:49,324 INFO L124 PetriNetUnfolderBase]: 5192/8396 cut-off events. [2024-06-27 18:18:49,324 INFO L125 PetriNetUnfolderBase]: For 457838/457854 co-relation queries the response was YES. [2024-06-27 18:18:49,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53405 conditions, 8396 events. 5192/8396 cut-off events. For 457838/457854 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 55143 event pairs, 1497 based on Foata normal form. 1/8241 useless extension candidates. Maximal degree in co-relation 53315. Up to 7305 conditions per place. [2024-06-27 18:18:49,407 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 221 selfloop transitions, 22 changer transitions 0/258 dead transitions. [2024-06-27 18:18:49,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 258 transitions, 2536 flow [2024-06-27 18:18:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:18:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:18:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:18:49,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49854227405247814 [2024-06-27 18:18:49,408 INFO L175 Difference]: Start difference. First operand has 194 places, 230 transitions, 1916 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:18:49,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 258 transitions, 2536 flow [2024-06-27 18:18:49,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 258 transitions, 2455 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 18:18:49,751 INFO L231 Difference]: Finished difference. Result has 197 places, 233 transitions, 1953 flow [2024-06-27 18:18:49,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1953, PETRI_PLACES=197, PETRI_TRANSITIONS=233} [2024-06-27 18:18:49,751 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 142 predicate places. [2024-06-27 18:18:49,752 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 233 transitions, 1953 flow [2024-06-27 18:18:49,752 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 18:18:49,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:49,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:49,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:18:49,752 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:49,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:49,753 INFO L85 PathProgramCache]: Analyzing trace with hash 406727809, now seen corresponding path program 1 times [2024-06-27 18:18:49,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:49,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250678048] [2024-06-27 18:18:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:49,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:50,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:50,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250678048] [2024-06-27 18:18:50,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250678048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:50,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:50,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:18:50,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894756509] [2024-06-27 18:18:50,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:50,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:18:50,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:50,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:18:50,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:18:50,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:18:50,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 233 transitions, 1953 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:50,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:50,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:18:50,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:52,051 INFO L124 PetriNetUnfolderBase]: 4908/8087 cut-off events. [2024-06-27 18:18:52,051 INFO L125 PetriNetUnfolderBase]: For 467051/467071 co-relation queries the response was YES. [2024-06-27 18:18:52,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51684 conditions, 8087 events. 4908/8087 cut-off events. For 467051/467071 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 54212 event pairs, 1465 based on Foata normal form. 2/7934 useless extension candidates. Maximal degree in co-relation 51593. Up to 6778 conditions per place. [2024-06-27 18:18:52,282 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 206 selfloop transitions, 16 changer transitions 0/261 dead transitions. [2024-06-27 18:18:52,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 261 transitions, 2515 flow [2024-06-27 18:18:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:18:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:18:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:18:52,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-27 18:18:52,284 INFO L175 Difference]: Start difference. First operand has 197 places, 233 transitions, 1953 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:18:52,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 261 transitions, 2515 flow [2024-06-27 18:18:52,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 261 transitions, 2419 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 18:18:52,772 INFO L231 Difference]: Finished difference. Result has 199 places, 236 transitions, 1947 flow [2024-06-27 18:18:52,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1947, PETRI_PLACES=199, PETRI_TRANSITIONS=236} [2024-06-27 18:18:52,773 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-27 18:18:52,773 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 236 transitions, 1947 flow [2024-06-27 18:18:52,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:52,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:52,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:52,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:18:52,774 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:52,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:52,774 INFO L85 PathProgramCache]: Analyzing trace with hash 893979821, now seen corresponding path program 2 times [2024-06-27 18:18:52,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:52,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473500906] [2024-06-27 18:18:52,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:52,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:53,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:53,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473500906] [2024-06-27 18:18:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473500906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:53,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:53,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:18:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182476845] [2024-06-27 18:18:53,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:53,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:18:53,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:53,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:18:53,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:18:53,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:18:53,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 236 transitions, 1947 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:53,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:53,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:18:53,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:55,167 INFO L124 PetriNetUnfolderBase]: 4954/8363 cut-off events. [2024-06-27 18:18:55,167 INFO L125 PetriNetUnfolderBase]: For 482725/482758 co-relation queries the response was YES. [2024-06-27 18:18:55,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53073 conditions, 8363 events. 4954/8363 cut-off events. For 482725/482758 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 57879 event pairs, 1460 based on Foata normal form. 8/8155 useless extension candidates. Maximal degree in co-relation 52981. Up to 6812 conditions per place. [2024-06-27 18:18:55,267 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 203 selfloop transitions, 21 changer transitions 0/263 dead transitions. [2024-06-27 18:18:55,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 263 transitions, 2523 flow [2024-06-27 18:18:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:18:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:18:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:18:55,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-27 18:18:55,269 INFO L175 Difference]: Start difference. First operand has 199 places, 236 transitions, 1947 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:18:55,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 263 transitions, 2523 flow [2024-06-27 18:18:55,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 263 transitions, 2455 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 18:18:55,790 INFO L231 Difference]: Finished difference. Result has 201 places, 239 transitions, 1985 flow [2024-06-27 18:18:55,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1985, PETRI_PLACES=201, PETRI_TRANSITIONS=239} [2024-06-27 18:18:55,791 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2024-06-27 18:18:55,791 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 239 transitions, 1985 flow [2024-06-27 18:18:55,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:55,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:55,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:55,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:18:55,791 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:55,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:55,792 INFO L85 PathProgramCache]: Analyzing trace with hash 413243110, now seen corresponding path program 3 times [2024-06-27 18:18:55,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:55,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127934791] [2024-06-27 18:18:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:55,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:56,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:56,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127934791] [2024-06-27 18:18:56,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127934791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:56,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:56,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:18:56,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957223446] [2024-06-27 18:18:56,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:56,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:18:56,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:18:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:18:56,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:18:56,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 239 transitions, 1985 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 18:18:56,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:56,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:18:56,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:18:58,015 INFO L124 PetriNetUnfolderBase]: 5241/8669 cut-off events. [2024-06-27 18:18:58,016 INFO L125 PetriNetUnfolderBase]: For 502098/502128 co-relation queries the response was YES. [2024-06-27 18:18:58,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56368 conditions, 8669 events. 5241/8669 cut-off events. For 502098/502128 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 58607 event pairs, 1492 based on Foata normal form. 5/8458 useless extension candidates. Maximal degree in co-relation 56275. Up to 7333 conditions per place. [2024-06-27 18:18:58,118 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 222 selfloop transitions, 29 changer transitions 0/266 dead transitions. [2024-06-27 18:18:58,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 266 transitions, 2635 flow [2024-06-27 18:18:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:18:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:18:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:18:58,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49854227405247814 [2024-06-27 18:18:58,119 INFO L175 Difference]: Start difference. First operand has 201 places, 239 transitions, 1985 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:18:58,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 266 transitions, 2635 flow [2024-06-27 18:18:58,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 266 transitions, 2551 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 18:18:58,603 INFO L231 Difference]: Finished difference. Result has 203 places, 242 transitions, 2043 flow [2024-06-27 18:18:58,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2043, PETRI_PLACES=203, PETRI_TRANSITIONS=242} [2024-06-27 18:18:58,603 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 148 predicate places. [2024-06-27 18:18:58,603 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 242 transitions, 2043 flow [2024-06-27 18:18:58,604 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 18:18:58,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:18:58,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:18:58,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:18:58,604 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:18:58,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:18:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash 894306251, now seen corresponding path program 3 times [2024-06-27 18:18:58,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:18:58,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839889654] [2024-06-27 18:18:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:18:58,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:18:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:18:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:59,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:59,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839889654] [2024-06-27 18:18:59,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839889654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:18:59,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:18:59,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:18:59,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445942238] [2024-06-27 18:18:59,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:18:59,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:18:59,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:18:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:18:59,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:18:59,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 242 transitions, 2043 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:18:59,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:18:59,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:18:59,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:00,922 INFO L124 PetriNetUnfolderBase]: 4971/8454 cut-off events. [2024-06-27 18:19:00,922 INFO L125 PetriNetUnfolderBase]: For 507954/507993 co-relation queries the response was YES. [2024-06-27 18:19:00,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54697 conditions, 8454 events. 4971/8454 cut-off events. For 507954/507993 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 59258 event pairs, 1464 based on Foata normal form. 8/8229 useless extension candidates. Maximal degree in co-relation 54603. Up to 6803 conditions per place. [2024-06-27 18:19:01,020 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 201 selfloop transitions, 31 changer transitions 0/272 dead transitions. [2024-06-27 18:19:01,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 272 transitions, 2661 flow [2024-06-27 18:19:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:19:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:19:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:19:01,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131195335276968 [2024-06-27 18:19:01,022 INFO L175 Difference]: Start difference. First operand has 203 places, 242 transitions, 2043 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:19:01,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 272 transitions, 2661 flow [2024-06-27 18:19:01,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 272 transitions, 2541 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 18:19:01,560 INFO L231 Difference]: Finished difference. Result has 206 places, 248 transitions, 2094 flow [2024-06-27 18:19:01,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1923, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2094, PETRI_PLACES=206, PETRI_TRANSITIONS=248} [2024-06-27 18:19:01,560 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 151 predicate places. [2024-06-27 18:19:01,560 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 248 transitions, 2094 flow [2024-06-27 18:19:01,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:01,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:01,561 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 18:19:01,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:19:01,561 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:01,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1133535975, now seen corresponding path program 1 times [2024-06-27 18:19:01,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:01,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532194916] [2024-06-27 18:19:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:01,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:02,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532194916] [2024-06-27 18:19:02,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532194916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:02,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:02,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:02,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487070767] [2024-06-27 18:19:02,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:02,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:02,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:02,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:02,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 248 transitions, 2094 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 18:19:02,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:02,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:02,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:04,627 INFO L124 PetriNetUnfolderBase]: 6009/9807 cut-off events. [2024-06-27 18:19:04,627 INFO L125 PetriNetUnfolderBase]: For 639022/639022 co-relation queries the response was YES. [2024-06-27 18:19:04,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66363 conditions, 9807 events. 6009/9807 cut-off events. For 639022/639022 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 65845 event pairs, 1392 based on Foata normal form. 16/9585 useless extension candidates. Maximal degree in co-relation 66267. Up to 7781 conditions per place. [2024-06-27 18:19:04,729 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 288 selfloop transitions, 37 changer transitions 0/335 dead transitions. [2024-06-27 18:19:04,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 335 transitions, 3357 flow [2024-06-27 18:19:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:19:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:19:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 287 transitions. [2024-06-27 18:19:04,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-27 18:19:04,731 INFO L175 Difference]: Start difference. First operand has 206 places, 248 transitions, 2094 flow. Second operand 11 states and 287 transitions. [2024-06-27 18:19:04,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 335 transitions, 3357 flow [2024-06-27 18:19:05,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 335 transitions, 3283 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 18:19:05,326 INFO L231 Difference]: Finished difference. Result has 214 places, 250 transitions, 2210 flow [2024-06-27 18:19:05,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2210, PETRI_PLACES=214, PETRI_TRANSITIONS=250} [2024-06-27 18:19:05,326 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 159 predicate places. [2024-06-27 18:19:05,326 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 250 transitions, 2210 flow [2024-06-27 18:19:05,327 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 18:19:05,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:05,327 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 18:19:05,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:19:05,327 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:05,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1609013751, now seen corresponding path program 2 times [2024-06-27 18:19:05,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:05,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309055742] [2024-06-27 18:19:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:05,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:06,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:06,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309055742] [2024-06-27 18:19:06,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309055742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:06,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:06,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:06,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97093023] [2024-06-27 18:19:06,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:06,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:06,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:06,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:06,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:06,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:06,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 250 transitions, 2210 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 18:19:06,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:06,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:06,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:08,201 INFO L124 PetriNetUnfolderBase]: 6139/9793 cut-off events. [2024-06-27 18:19:08,201 INFO L125 PetriNetUnfolderBase]: For 666672/666672 co-relation queries the response was YES. [2024-06-27 18:19:08,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68435 conditions, 9793 events. 6139/9793 cut-off events. For 666672/666672 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 64416 event pairs, 1759 based on Foata normal form. 16/9623 useless extension candidates. Maximal degree in co-relation 68337. Up to 8133 conditions per place. [2024-06-27 18:19:08,319 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 284 selfloop transitions, 33 changer transitions 0/327 dead transitions. [2024-06-27 18:19:08,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 327 transitions, 3381 flow [2024-06-27 18:19:08,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:19:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:19:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-27 18:19:08,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2024-06-27 18:19:08,320 INFO L175 Difference]: Start difference. First operand has 214 places, 250 transitions, 2210 flow. Second operand 10 states and 262 transitions. [2024-06-27 18:19:08,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 327 transitions, 3381 flow [2024-06-27 18:19:08,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 327 transitions, 3287 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 18:19:08,840 INFO L231 Difference]: Finished difference. Result has 217 places, 251 transitions, 2244 flow [2024-06-27 18:19:08,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2244, PETRI_PLACES=217, PETRI_TRANSITIONS=251} [2024-06-27 18:19:08,840 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 162 predicate places. [2024-06-27 18:19:08,840 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 251 transitions, 2244 flow [2024-06-27 18:19:08,840 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 18:19:08,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:08,841 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 18:19:08,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:19:08,841 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:08,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash -536418323, now seen corresponding path program 3 times [2024-06-27 18:19:08,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:08,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412542846] [2024-06-27 18:19:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:08,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:09,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:09,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412542846] [2024-06-27 18:19:09,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412542846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:09,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:09,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:09,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133063121] [2024-06-27 18:19:09,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:09,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:09,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:09,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:09,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:09,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:09,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 251 transitions, 2244 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 18:19:09,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:09,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:09,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:11,732 INFO L124 PetriNetUnfolderBase]: 6261/10072 cut-off events. [2024-06-27 18:19:11,732 INFO L125 PetriNetUnfolderBase]: For 682120/682120 co-relation queries the response was YES. [2024-06-27 18:19:11,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69067 conditions, 10072 events. 6261/10072 cut-off events. For 682120/682120 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 67186 event pairs, 1876 based on Foata normal form. 20/9887 useless extension candidates. Maximal degree in co-relation 68967. Up to 8670 conditions per place. [2024-06-27 18:19:11,862 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 282 selfloop transitions, 29 changer transitions 0/321 dead transitions. [2024-06-27 18:19:11,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 321 transitions, 3145 flow [2024-06-27 18:19:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:19:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:19:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-27 18:19:11,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183673469387755 [2024-06-27 18:19:11,863 INFO L175 Difference]: Start difference. First operand has 217 places, 251 transitions, 2244 flow. Second operand 10 states and 254 transitions. [2024-06-27 18:19:11,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 321 transitions, 3145 flow [2024-06-27 18:19:12,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 321 transitions, 3036 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 18:19:12,456 INFO L231 Difference]: Finished difference. Result has 219 places, 252 transitions, 2254 flow [2024-06-27 18:19:12,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2254, PETRI_PLACES=219, PETRI_TRANSITIONS=252} [2024-06-27 18:19:12,457 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 164 predicate places. [2024-06-27 18:19:12,457 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 252 transitions, 2254 flow [2024-06-27 18:19:12,457 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 18:19:12,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:12,458 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 18:19:12,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:19:12,458 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:12,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1191743745, now seen corresponding path program 4 times [2024-06-27 18:19:12,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:12,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891887877] [2024-06-27 18:19:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:13,445 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 18:19:13,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:13,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891887877] [2024-06-27 18:19:13,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891887877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:13,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:13,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:13,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243335280] [2024-06-27 18:19:13,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:13,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:13,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:13,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:13,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:13,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 252 transitions, 2254 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 18:19:13,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:13,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:13,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:15,400 INFO L124 PetriNetUnfolderBase]: 6233/9989 cut-off events. [2024-06-27 18:19:15,400 INFO L125 PetriNetUnfolderBase]: For 647935/647935 co-relation queries the response was YES. [2024-06-27 18:19:15,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67059 conditions, 9989 events. 6233/9989 cut-off events. For 647935/647935 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 66225 event pairs, 1802 based on Foata normal form. 16/9811 useless extension candidates. Maximal degree in co-relation 66958. Up to 8420 conditions per place. [2024-06-27 18:19:15,520 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 284 selfloop transitions, 31 changer transitions 0/325 dead transitions. [2024-06-27 18:19:15,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 325 transitions, 3129 flow [2024-06-27 18:19:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:19:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:19:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 18:19:15,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265306122448979 [2024-06-27 18:19:15,521 INFO L175 Difference]: Start difference. First operand has 219 places, 252 transitions, 2254 flow. Second operand 10 states and 258 transitions. [2024-06-27 18:19:15,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 325 transitions, 3129 flow [2024-06-27 18:19:16,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 325 transitions, 3022 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 18:19:16,053 INFO L231 Difference]: Finished difference. Result has 221 places, 252 transitions, 2215 flow [2024-06-27 18:19:16,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2215, PETRI_PLACES=221, PETRI_TRANSITIONS=252} [2024-06-27 18:19:16,053 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 166 predicate places. [2024-06-27 18:19:16,054 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 252 transitions, 2215 flow [2024-06-27 18:19:16,054 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 18:19:16,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:16,054 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 18:19:16,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:19:16,054 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:16,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1119405687, now seen corresponding path program 5 times [2024-06-27 18:19:16,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:16,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450632180] [2024-06-27 18:19:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:16,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:17,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:17,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450632180] [2024-06-27 18:19:17,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450632180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:17,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:17,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:17,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20339386] [2024-06-27 18:19:17,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:17,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:17,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:17,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:17,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:17,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:17,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 252 transitions, 2215 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 18:19:17,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:17,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:17,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:19,259 INFO L124 PetriNetUnfolderBase]: 6400/10289 cut-off events. [2024-06-27 18:19:19,259 INFO L125 PetriNetUnfolderBase]: For 669284/669290 co-relation queries the response was YES. [2024-06-27 18:19:19,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68535 conditions, 10289 events. 6400/10289 cut-off events. For 669284/669290 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 68983 event pairs, 1738 based on Foata normal form. 21/10106 useless extension candidates. Maximal degree in co-relation 68433. Up to 8124 conditions per place. [2024-06-27 18:19:19,388 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 217 selfloop transitions, 97 changer transitions 0/324 dead transitions. [2024-06-27 18:19:19,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 324 transitions, 3155 flow [2024-06-27 18:19:19,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:19:19,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:19:19,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 266 transitions. [2024-06-27 18:19:19,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-27 18:19:19,389 INFO L175 Difference]: Start difference. First operand has 221 places, 252 transitions, 2215 flow. Second operand 10 states and 266 transitions. [2024-06-27 18:19:19,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 324 transitions, 3155 flow [2024-06-27 18:19:20,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 324 transitions, 3070 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 18:19:20,079 INFO L231 Difference]: Finished difference. Result has 222 places, 253 transitions, 2389 flow [2024-06-27 18:19:20,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2389, PETRI_PLACES=222, PETRI_TRANSITIONS=253} [2024-06-27 18:19:20,080 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 167 predicate places. [2024-06-27 18:19:20,080 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 253 transitions, 2389 flow [2024-06-27 18:19:20,080 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 18:19:20,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:20,081 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 18:19:20,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:19:20,081 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:20,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:20,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1119410337, now seen corresponding path program 6 times [2024-06-27 18:19:20,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:20,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916427381] [2024-06-27 18:19:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:20,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:20,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:20,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916427381] [2024-06-27 18:19:20,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916427381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:20,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:20,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:20,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930804090] [2024-06-27 18:19:20,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:20,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:20,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:20,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:20,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:21,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:21,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 253 transitions, 2389 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 18:19:21,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:21,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:21,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:23,420 INFO L124 PetriNetUnfolderBase]: 6733/10807 cut-off events. [2024-06-27 18:19:23,421 INFO L125 PetriNetUnfolderBase]: For 757296/757302 co-relation queries the response was YES. [2024-06-27 18:19:23,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75202 conditions, 10807 events. 6733/10807 cut-off events. For 757296/757302 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 72954 event pairs, 1772 based on Foata normal form. 17/10622 useless extension candidates. Maximal degree in co-relation 75099. Up to 8163 conditions per place. [2024-06-27 18:19:23,544 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 221 selfloop transitions, 100 changer transitions 0/331 dead transitions. [2024-06-27 18:19:23,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 331 transitions, 3667 flow [2024-06-27 18:19:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:19:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:19:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-06-27 18:19:23,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-27 18:19:23,546 INFO L175 Difference]: Start difference. First operand has 222 places, 253 transitions, 2389 flow. Second operand 10 states and 270 transitions. [2024-06-27 18:19:23,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 331 transitions, 3667 flow [2024-06-27 18:19:24,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 331 transitions, 3440 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 18:19:24,195 INFO L231 Difference]: Finished difference. Result has 224 places, 255 transitions, 2486 flow [2024-06-27 18:19:24,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2162, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2486, PETRI_PLACES=224, PETRI_TRANSITIONS=255} [2024-06-27 18:19:24,196 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 169 predicate places. [2024-06-27 18:19:24,196 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 255 transitions, 2486 flow [2024-06-27 18:19:24,196 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 18:19:24,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:24,196 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 18:19:24,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 18:19:24,197 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:24,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:24,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1112976597, now seen corresponding path program 7 times [2024-06-27 18:19:24,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:24,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562707566] [2024-06-27 18:19:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:24,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:25,183 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 18:19:25,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:25,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562707566] [2024-06-27 18:19:25,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562707566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:25,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:25,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:25,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769934922] [2024-06-27 18:19:25,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:25,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:25,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:25,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:25,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 255 transitions, 2486 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 18:19:25,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:25,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:25,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:27,397 INFO L124 PetriNetUnfolderBase]: 6697/10790 cut-off events. [2024-06-27 18:19:27,398 INFO L125 PetriNetUnfolderBase]: For 728146/728152 co-relation queries the response was YES. [2024-06-27 18:19:27,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72986 conditions, 10790 events. 6697/10790 cut-off events. For 728146/728152 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 73154 event pairs, 1807 based on Foata normal form. 21/10598 useless extension candidates. Maximal degree in co-relation 72882. Up to 8583 conditions per place. [2024-06-27 18:19:27,728 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 216 selfloop transitions, 99 changer transitions 0/325 dead transitions. [2024-06-27 18:19:27,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 325 transitions, 3368 flow [2024-06-27 18:19:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:19:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:19:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 18:19:27,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387755102040817 [2024-06-27 18:19:27,730 INFO L175 Difference]: Start difference. First operand has 224 places, 255 transitions, 2486 flow. Second operand 10 states and 264 transitions. [2024-06-27 18:19:27,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 325 transitions, 3368 flow [2024-06-27 18:19:28,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 325 transitions, 3173 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 18:19:28,397 INFO L231 Difference]: Finished difference. Result has 228 places, 255 transitions, 2496 flow [2024-06-27 18:19:28,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2496, PETRI_PLACES=228, PETRI_TRANSITIONS=255} [2024-06-27 18:19:28,397 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 173 predicate places. [2024-06-27 18:19:28,398 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 255 transitions, 2496 flow [2024-06-27 18:19:28,398 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 18:19:28,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:28,398 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 18:19:28,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 18:19:28,398 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:28,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash 688107999, now seen corresponding path program 8 times [2024-06-27 18:19:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:28,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038184264] [2024-06-27 18:19:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:28,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:29,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038184264] [2024-06-27 18:19:29,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038184264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:29,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:29,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:29,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460811060] [2024-06-27 18:19:29,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:29,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:29,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:29,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:29,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:29,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 255 transitions, 2496 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 18:19:29,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:29,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:29,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:31,748 INFO L124 PetriNetUnfolderBase]: 7030/11368 cut-off events. [2024-06-27 18:19:31,748 INFO L125 PetriNetUnfolderBase]: For 784585/784591 co-relation queries the response was YES. [2024-06-27 18:19:31,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78222 conditions, 11368 events. 7030/11368 cut-off events. For 784585/784591 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 78101 event pairs, 1889 based on Foata normal form. 17/11167 useless extension candidates. Maximal degree in co-relation 78116. Up to 8846 conditions per place. [2024-06-27 18:19:31,900 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 226 selfloop transitions, 98 changer transitions 0/334 dead transitions. [2024-06-27 18:19:31,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 334 transitions, 3796 flow [2024-06-27 18:19:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:19:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:19:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-27 18:19:31,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-27 18:19:31,901 INFO L175 Difference]: Start difference. First operand has 228 places, 255 transitions, 2496 flow. Second operand 10 states and 273 transitions. [2024-06-27 18:19:31,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 334 transitions, 3796 flow [2024-06-27 18:19:32,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 334 transitions, 3588 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 18:19:32,725 INFO L231 Difference]: Finished difference. Result has 229 places, 257 transitions, 2612 flow [2024-06-27 18:19:32,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2612, PETRI_PLACES=229, PETRI_TRANSITIONS=257} [2024-06-27 18:19:32,726 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 174 predicate places. [2024-06-27 18:19:32,726 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 257 transitions, 2612 flow [2024-06-27 18:19:32,726 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 18:19:32,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:32,726 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 18:19:32,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 18:19:32,727 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:32,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:32,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1285466487, now seen corresponding path program 9 times [2024-06-27 18:19:32,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:32,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955579225] [2024-06-27 18:19:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:32,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:33,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:33,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955579225] [2024-06-27 18:19:33,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955579225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:33,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:33,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:33,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332552440] [2024-06-27 18:19:33,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:33,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:33,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:33,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:33,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:33,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:33,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 257 transitions, 2612 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 18:19:33,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:33,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:33,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:36,099 INFO L124 PetriNetUnfolderBase]: 6994/11361 cut-off events. [2024-06-27 18:19:36,099 INFO L125 PetriNetUnfolderBase]: For 770864/770870 co-relation queries the response was YES. [2024-06-27 18:19:36,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76776 conditions, 11361 events. 6994/11361 cut-off events. For 770864/770870 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 78467 event pairs, 1927 based on Foata normal form. 21/11148 useless extension candidates. Maximal degree in co-relation 76669. Up to 9042 conditions per place. [2024-06-27 18:19:36,278 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 222 selfloop transitions, 96 changer transitions 0/328 dead transitions. [2024-06-27 18:19:36,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 328 transitions, 3504 flow [2024-06-27 18:19:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:19:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:19:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-06-27 18:19:36,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448979591836735 [2024-06-27 18:19:36,280 INFO L175 Difference]: Start difference. First operand has 229 places, 257 transitions, 2612 flow. Second operand 10 states and 267 transitions. [2024-06-27 18:19:36,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 328 transitions, 3504 flow [2024-06-27 18:19:37,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 328 transitions, 3305 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 18:19:37,324 INFO L231 Difference]: Finished difference. Result has 233 places, 257 transitions, 2612 flow [2024-06-27 18:19:37,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2612, PETRI_PLACES=233, PETRI_TRANSITIONS=257} [2024-06-27 18:19:37,325 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 178 predicate places. [2024-06-27 18:19:37,325 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 257 transitions, 2612 flow [2024-06-27 18:19:37,325 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 18:19:37,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:37,325 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 18:19:37,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 18:19:37,326 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:37,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1290228087, now seen corresponding path program 10 times [2024-06-27 18:19:37,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:37,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815615434] [2024-06-27 18:19:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:37,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:38,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:38,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815615434] [2024-06-27 18:19:38,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815615434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:38,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:38,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:38,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120040733] [2024-06-27 18:19:38,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:38,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:38,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:38,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:38,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:38,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 257 transitions, 2612 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 18:19:38,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:38,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:38,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:40,829 INFO L124 PetriNetUnfolderBase]: 7124/11439 cut-off events. [2024-06-27 18:19:40,829 INFO L125 PetriNetUnfolderBase]: For 757190/757196 co-relation queries the response was YES. [2024-06-27 18:19:40,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77349 conditions, 11439 events. 7124/11439 cut-off events. For 757190/757196 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 78063 event pairs, 1825 based on Foata normal form. 17/11255 useless extension candidates. Maximal degree in co-relation 77240. Up to 8135 conditions per place. [2024-06-27 18:19:40,972 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 218 selfloop transitions, 105 changer transitions 0/333 dead transitions. [2024-06-27 18:19:40,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 333 transitions, 3592 flow [2024-06-27 18:19:40,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:19:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:19:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-06-27 18:19:40,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-27 18:19:40,975 INFO L175 Difference]: Start difference. First operand has 233 places, 257 transitions, 2612 flow. Second operand 10 states and 270 transitions. [2024-06-27 18:19:40,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 333 transitions, 3592 flow [2024-06-27 18:19:41,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 333 transitions, 3395 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 18:19:41,654 INFO L231 Difference]: Finished difference. Result has 234 places, 258 transitions, 2695 flow [2024-06-27 18:19:41,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2695, PETRI_PLACES=234, PETRI_TRANSITIONS=258} [2024-06-27 18:19:41,655 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 179 predicate places. [2024-06-27 18:19:41,655 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 258 transitions, 2695 flow [2024-06-27 18:19:41,655 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 18:19:41,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:41,655 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 18:19:41,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 18:19:41,656 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 18:19:41,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1973982207, now seen corresponding path program 1 times [2024-06-27 18:19:41,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:41,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814334527] [2024-06-27 18:19:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:41,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:42,340 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 18:19:42,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:42,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814334527] [2024-06-27 18:19:42,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814334527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:42,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:42,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:19:42,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266836662] [2024-06-27 18:19:42,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:42,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:19:42,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:42,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:19:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:19:42,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:19:42,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 258 transitions, 2695 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 18:19:42,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:42,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:19:42,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:44,245 INFO L124 PetriNetUnfolderBase]: 6729/11114 cut-off events. [2024-06-27 18:19:44,246 INFO L125 PetriNetUnfolderBase]: For 733189/733202 co-relation queries the response was YES. [2024-06-27 18:19:44,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74721 conditions, 11114 events. 6729/11114 cut-off events. For 733189/733202 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 78772 event pairs, 2127 based on Foata normal form. 11/10835 useless extension candidates. Maximal degree in co-relation 74611. Up to 9578 conditions per place. [2024-06-27 18:19:44,399 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 241 selfloop transitions, 24 changer transitions 0/300 dead transitions. [2024-06-27 18:19:44,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 300 transitions, 3451 flow [2024-06-27 18:19:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:19:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:19:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:19:44,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131195335276968 [2024-06-27 18:19:44,400 INFO L175 Difference]: Start difference. First operand has 234 places, 258 transitions, 2695 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:19:44,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 300 transitions, 3451 flow [2024-06-27 18:19:45,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 300 transitions, 3185 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 18:19:45,345 INFO L231 Difference]: Finished difference. Result has 235 places, 271 transitions, 2674 flow [2024-06-27 18:19:45,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2674, PETRI_PLACES=235, PETRI_TRANSITIONS=271} [2024-06-27 18:19:45,346 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 180 predicate places. [2024-06-27 18:19:45,346 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 271 transitions, 2674 flow [2024-06-27 18:19:45,346 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 18:19:45,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:45,347 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 18:19:45,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 18:19:45,347 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 18:19:45,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:45,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1981630527, now seen corresponding path program 2 times [2024-06-27 18:19:45,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:45,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449737793] [2024-06-27 18:19:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:45,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:45,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:45,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449737793] [2024-06-27 18:19:45,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449737793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:45,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:45,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:19:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935402471] [2024-06-27 18:19:45,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:45,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:19:45,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:19:45,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:19:46,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:19:46,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 271 transitions, 2674 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 18:19:46,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:46,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:19:46,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:47,922 INFO L124 PetriNetUnfolderBase]: 6766/11142 cut-off events. [2024-06-27 18:19:47,922 INFO L125 PetriNetUnfolderBase]: For 733568/733581 co-relation queries the response was YES. [2024-06-27 18:19:48,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74705 conditions, 11142 events. 6766/11142 cut-off events. For 733568/733581 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 78692 event pairs, 2125 based on Foata normal form. 11/10866 useless extension candidates. Maximal degree in co-relation 74592. Up to 9598 conditions per place. [2024-06-27 18:19:48,054 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 242 selfloop transitions, 31 changer transitions 0/308 dead transitions. [2024-06-27 18:19:48,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 308 transitions, 3589 flow [2024-06-27 18:19:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:19:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:19:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:19:48,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131195335276968 [2024-06-27 18:19:48,055 INFO L175 Difference]: Start difference. First operand has 235 places, 271 transitions, 2674 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:19:48,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 308 transitions, 3589 flow [2024-06-27 18:19:48,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 308 transitions, 3500 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 18:19:48,757 INFO L231 Difference]: Finished difference. Result has 240 places, 279 transitions, 2803 flow [2024-06-27 18:19:48,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2803, PETRI_PLACES=240, PETRI_TRANSITIONS=279} [2024-06-27 18:19:48,758 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 185 predicate places. [2024-06-27 18:19:48,758 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 279 transitions, 2803 flow [2024-06-27 18:19:48,758 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 18:19:48,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:48,759 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 18:19:48,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 18:19:48,759 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:48,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash 865490433, now seen corresponding path program 1 times [2024-06-27 18:19:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:48,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938426929] [2024-06-27 18:19:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:49,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:49,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938426929] [2024-06-27 18:19:49,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938426929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:49,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:49,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:49,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883773345] [2024-06-27 18:19:49,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:49,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:49,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:49,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:49,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:49,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:49,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 279 transitions, 2803 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 18:19:49,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:49,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:49,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:52,482 INFO L124 PetriNetUnfolderBase]: 7215/11763 cut-off events. [2024-06-27 18:19:52,482 INFO L125 PetriNetUnfolderBase]: For 782647/782653 co-relation queries the response was YES. [2024-06-27 18:19:52,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79963 conditions, 11763 events. 7215/11763 cut-off events. For 782647/782653 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 81924 event pairs, 2070 based on Foata normal form. 5/11515 useless extension candidates. Maximal degree in co-relation 79848. Up to 10114 conditions per place. [2024-06-27 18:19:52,614 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 278 selfloop transitions, 59 changer transitions 0/347 dead transitions. [2024-06-27 18:19:52,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 347 transitions, 3790 flow [2024-06-27 18:19:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:19:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:19:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 18:19:52,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-27 18:19:52,616 INFO L175 Difference]: Start difference. First operand has 240 places, 279 transitions, 2803 flow. Second operand 10 states and 255 transitions. [2024-06-27 18:19:52,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 347 transitions, 3790 flow [2024-06-27 18:19:53,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 347 transitions, 3703 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 18:19:53,288 INFO L231 Difference]: Finished difference. Result has 248 places, 284 transitions, 2946 flow [2024-06-27 18:19:53,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2946, PETRI_PLACES=248, PETRI_TRANSITIONS=284} [2024-06-27 18:19:53,288 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 193 predicate places. [2024-06-27 18:19:53,289 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 284 transitions, 2946 flow [2024-06-27 18:19:53,289 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 18:19:53,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:53,289 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 18:19:53,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 18:19:53,289 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 18:19:53,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1981641439, now seen corresponding path program 1 times [2024-06-27 18:19:53,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:53,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68052016] [2024-06-27 18:19:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:53,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:54,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:54,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68052016] [2024-06-27 18:19:54,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68052016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:54,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:54,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:19:54,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49638653] [2024-06-27 18:19:54,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:54,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:19:54,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:54,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:19:54,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:19:54,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:19:54,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 284 transitions, 2946 flow. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:54,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:54,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:19:54,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:56,241 INFO L124 PetriNetUnfolderBase]: 6428/10711 cut-off events. [2024-06-27 18:19:56,241 INFO L125 PetriNetUnfolderBase]: For 792771/792846 co-relation queries the response was YES. [2024-06-27 18:19:56,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75166 conditions, 10711 events. 6428/10711 cut-off events. For 792771/792846 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 76746 event pairs, 1987 based on Foata normal form. 16/10385 useless extension candidates. Maximal degree in co-relation 75048. Up to 9005 conditions per place. [2024-06-27 18:19:56,385 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 243 selfloop transitions, 24 changer transitions 0/321 dead transitions. [2024-06-27 18:19:56,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 321 transitions, 3646 flow [2024-06-27 18:19:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:19:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:19:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:19:56,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-06-27 18:19:56,386 INFO L175 Difference]: Start difference. First operand has 248 places, 284 transitions, 2946 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:19:56,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 321 transitions, 3646 flow [2024-06-27 18:19:57,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 321 transitions, 3459 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 18:19:57,408 INFO L231 Difference]: Finished difference. Result has 249 places, 287 transitions, 2867 flow [2024-06-27 18:19:57,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2867, PETRI_PLACES=249, PETRI_TRANSITIONS=287} [2024-06-27 18:19:57,409 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 194 predicate places. [2024-06-27 18:19:57,409 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 287 transitions, 2867 flow [2024-06-27 18:19:57,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:57,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:57,409 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 18:19:57,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 18:19:57,410 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:57,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1453407001, now seen corresponding path program 11 times [2024-06-27 18:19:57,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:57,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429402054] [2024-06-27 18:19:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:57,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:58,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:58,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429402054] [2024-06-27 18:19:58,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429402054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:58,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:58,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:19:58,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846862857] [2024-06-27 18:19:58,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:58,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:19:58,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:58,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:19:58,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:19:58,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:19:58,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 287 transitions, 2867 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 18:19:58,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:58,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:19:58,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:01,033 INFO L124 PetriNetUnfolderBase]: 7450/12125 cut-off events. [2024-06-27 18:20:01,033 INFO L125 PetriNetUnfolderBase]: For 886554/886554 co-relation queries the response was YES. [2024-06-27 18:20:01,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85239 conditions, 12125 events. 7450/12125 cut-off events. For 886554/886554 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 84754 event pairs, 1953 based on Foata normal form. 20/11891 useless extension candidates. Maximal degree in co-relation 85120. Up to 9721 conditions per place. [2024-06-27 18:20:01,198 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 240 selfloop transitions, 105 changer transitions 0/355 dead transitions. [2024-06-27 18:20:01,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 355 transitions, 3897 flow [2024-06-27 18:20:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:20:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:20:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-27 18:20:01,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-06-27 18:20:01,200 INFO L175 Difference]: Start difference. First operand has 249 places, 287 transitions, 2867 flow. Second operand 10 states and 260 transitions. [2024-06-27 18:20:01,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 355 transitions, 3897 flow [2024-06-27 18:20:02,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 355 transitions, 3811 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 18:20:02,083 INFO L231 Difference]: Finished difference. Result has 253 places, 288 transitions, 3066 flow [2024-06-27 18:20:02,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2781, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3066, PETRI_PLACES=253, PETRI_TRANSITIONS=288} [2024-06-27 18:20:02,083 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 198 predicate places. [2024-06-27 18:20:02,083 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 288 transitions, 3066 flow [2024-06-27 18:20:02,084 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 18:20:02,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:02,084 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 18:20:02,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 18:20:02,084 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:02,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1217809849, now seen corresponding path program 12 times [2024-06-27 18:20:02,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:02,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152969912] [2024-06-27 18:20:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:02,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:03,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:03,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152969912] [2024-06-27 18:20:03,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152969912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:03,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:03,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:20:03,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565296856] [2024-06-27 18:20:03,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:03,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:20:03,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:03,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:20:03,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:20:03,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:03,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 288 transitions, 3066 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 18:20:03,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:03,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:03,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:05,804 INFO L124 PetriNetUnfolderBase]: 7617/12378 cut-off events. [2024-06-27 18:20:05,805 INFO L125 PetriNetUnfolderBase]: For 940948/940948 co-relation queries the response was YES. [2024-06-27 18:20:05,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88913 conditions, 12378 events. 7617/12378 cut-off events. For 940948/940948 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 86813 event pairs, 1966 based on Foata normal form. 20/12149 useless extension candidates. Maximal degree in co-relation 88793. Up to 9978 conditions per place. [2024-06-27 18:20:05,961 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 243 selfloop transitions, 103 changer transitions 0/356 dead transitions. [2024-06-27 18:20:05,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 356 transitions, 4100 flow [2024-06-27 18:20:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:20:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:20:05,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-27 18:20:05,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5326530612244897 [2024-06-27 18:20:05,962 INFO L175 Difference]: Start difference. First operand has 253 places, 288 transitions, 3066 flow. Second operand 10 states and 261 transitions. [2024-06-27 18:20:05,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 356 transitions, 4100 flow [2024-06-27 18:20:06,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 356 transitions, 3847 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 18:20:06,815 INFO L231 Difference]: Finished difference. Result has 255 places, 289 transitions, 3096 flow [2024-06-27 18:20:06,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2813, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3096, PETRI_PLACES=255, PETRI_TRANSITIONS=289} [2024-06-27 18:20:06,816 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 200 predicate places. [2024-06-27 18:20:06,816 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 289 transitions, 3096 flow [2024-06-27 18:20:06,816 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 18:20:06,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:06,816 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 18:20:06,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 18:20:06,817 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:06,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1390299739, now seen corresponding path program 13 times [2024-06-27 18:20:06,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:06,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345224601] [2024-06-27 18:20:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:06,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:07,722 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 18:20:07,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:07,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345224601] [2024-06-27 18:20:07,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345224601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:07,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:07,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:20:07,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628752635] [2024-06-27 18:20:07,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:07,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:20:07,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:07,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:20:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:20:07,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:07,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 289 transitions, 3096 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 18:20:07,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:07,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:07,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:10,535 INFO L124 PetriNetUnfolderBase]: 7784/12691 cut-off events. [2024-06-27 18:20:10,535 INFO L125 PetriNetUnfolderBase]: For 970495/970495 co-relation queries the response was YES. [2024-06-27 18:20:10,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90942 conditions, 12691 events. 7784/12691 cut-off events. For 970495/970495 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 89693 event pairs, 2052 based on Foata normal form. 20/12448 useless extension candidates. Maximal degree in co-relation 90821. Up to 10235 conditions per place. [2024-06-27 18:20:10,712 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 246 selfloop transitions, 101 changer transitions 0/357 dead transitions. [2024-06-27 18:20:10,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 357 transitions, 4134 flow [2024-06-27 18:20:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:20:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:20:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-27 18:20:10,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2024-06-27 18:20:10,714 INFO L175 Difference]: Start difference. First operand has 255 places, 289 transitions, 3096 flow. Second operand 10 states and 262 transitions. [2024-06-27 18:20:10,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 357 transitions, 4134 flow [2024-06-27 18:20:11,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 357 transitions, 3883 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 18:20:11,656 INFO L231 Difference]: Finished difference. Result has 257 places, 290 transitions, 3126 flow [2024-06-27 18:20:11,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2845, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3126, PETRI_PLACES=257, PETRI_TRANSITIONS=290} [2024-06-27 18:20:11,657 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2024-06-27 18:20:11,657 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 290 transitions, 3126 flow [2024-06-27 18:20:11,657 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 18:20:11,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:11,657 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 18:20:11,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 18:20:11,657 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:11,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:11,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1353539053, now seen corresponding path program 14 times [2024-06-27 18:20:11,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:11,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111291089] [2024-06-27 18:20:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:11,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:12,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:12,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111291089] [2024-06-27 18:20:12,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111291089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:12,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:12,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:20:12,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485971508] [2024-06-27 18:20:12,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:12,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:20:12,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:12,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:20:12,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:20:12,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:12,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 290 transitions, 3126 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 18:20:12,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:12,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:12,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:15,685 INFO L124 PetriNetUnfolderBase]: 8117/13231 cut-off events. [2024-06-27 18:20:15,686 INFO L125 PetriNetUnfolderBase]: For 1070951/1070951 co-relation queries the response was YES. [2024-06-27 18:20:15,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97134 conditions, 13231 events. 8117/13231 cut-off events. For 1070951/1070951 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 94221 event pairs, 2079 based on Foata normal form. 16/12981 useless extension candidates. Maximal degree in co-relation 97012. Up to 10247 conditions per place. [2024-06-27 18:20:15,875 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 246 selfloop transitions, 108 changer transitions 0/364 dead transitions. [2024-06-27 18:20:15,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 364 transitions, 4558 flow [2024-06-27 18:20:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:20:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:20:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 18:20:15,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387755102040817 [2024-06-27 18:20:15,877 INFO L175 Difference]: Start difference. First operand has 257 places, 290 transitions, 3126 flow. Second operand 10 states and 264 transitions. [2024-06-27 18:20:15,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 364 transitions, 4558 flow [2024-06-27 18:20:17,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 364 transitions, 4309 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 18:20:17,165 INFO L231 Difference]: Finished difference. Result has 259 places, 292 transitions, 3245 flow [2024-06-27 18:20:17,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3245, PETRI_PLACES=259, PETRI_TRANSITIONS=292} [2024-06-27 18:20:17,165 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 204 predicate places. [2024-06-27 18:20:17,165 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 292 transitions, 3245 flow [2024-06-27 18:20:17,166 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 18:20:17,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:17,166 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 18:20:17,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 18:20:17,166 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:17,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:17,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1359972793, now seen corresponding path program 15 times [2024-06-27 18:20:17,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:17,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322207901] [2024-06-27 18:20:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:17,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:18,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:18,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322207901] [2024-06-27 18:20:18,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322207901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:18,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:18,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:20:18,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064555870] [2024-06-27 18:20:18,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:18,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:20:18,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:18,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:20:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:20:18,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:18,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 292 transitions, 3245 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 18:20:18,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:18,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:18,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:21,187 INFO L124 PetriNetUnfolderBase]: 8284/13543 cut-off events. [2024-06-27 18:20:21,188 INFO L125 PetriNetUnfolderBase]: For 1114856/1114856 co-relation queries the response was YES. [2024-06-27 18:20:21,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99345 conditions, 13543 events. 8284/13543 cut-off events. For 1114856/1114856 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 97204 event pairs, 2158 based on Foata normal form. 20/13281 useless extension candidates. Maximal degree in co-relation 99222. Up to 11007 conditions per place. [2024-06-27 18:20:21,397 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 246 selfloop transitions, 104 changer transitions 0/360 dead transitions. [2024-06-27 18:20:21,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 360 transitions, 4293 flow [2024-06-27 18:20:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:20:21,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:20:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-27 18:20:21,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5326530612244897 [2024-06-27 18:20:21,399 INFO L175 Difference]: Start difference. First operand has 259 places, 292 transitions, 3245 flow. Second operand 10 states and 261 transitions. [2024-06-27 18:20:21,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 360 transitions, 4293 flow [2024-06-27 18:20:22,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 360 transitions, 4077 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 18:20:22,744 INFO L231 Difference]: Finished difference. Result has 263 places, 293 transitions, 3320 flow [2024-06-27 18:20:22,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3320, PETRI_PLACES=263, PETRI_TRANSITIONS=293} [2024-06-27 18:20:22,744 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 208 predicate places. [2024-06-27 18:20:22,744 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 293 transitions, 3320 flow [2024-06-27 18:20:22,744 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 18:20:22,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:22,745 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 18:20:22,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 18:20:22,745 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:22,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:22,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1383870649, now seen corresponding path program 16 times [2024-06-27 18:20:22,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:22,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040606134] [2024-06-27 18:20:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:22,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:23,723 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 18:20:23,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:23,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040606134] [2024-06-27 18:20:23,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040606134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:23,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:23,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:20:23,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820989818] [2024-06-27 18:20:23,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:23,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:20:23,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:23,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:20:23,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:20:23,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:23,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 293 transitions, 3320 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 18:20:23,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:23,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:23,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:26,877 INFO L124 PetriNetUnfolderBase]: 8451/13842 cut-off events. [2024-06-27 18:20:26,878 INFO L125 PetriNetUnfolderBase]: For 1122681/1122681 co-relation queries the response was YES. [2024-06-27 18:20:27,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101195 conditions, 13842 events. 8451/13842 cut-off events. For 1122681/1122681 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 99909 event pairs, 2222 based on Foata normal form. 20/13573 useless extension candidates. Maximal degree in co-relation 101070. Up to 11264 conditions per place. [2024-06-27 18:20:27,073 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 252 selfloop transitions, 100 changer transitions 0/362 dead transitions. [2024-06-27 18:20:27,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 362 transitions, 4378 flow [2024-06-27 18:20:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:20:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:20:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 18:20:27,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387755102040817 [2024-06-27 18:20:27,075 INFO L175 Difference]: Start difference. First operand has 263 places, 293 transitions, 3320 flow. Second operand 10 states and 264 transitions. [2024-06-27 18:20:27,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 362 transitions, 4378 flow [2024-06-27 18:20:28,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 362 transitions, 4135 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 18:20:28,652 INFO L231 Difference]: Finished difference. Result has 265 places, 294 transitions, 3360 flow [2024-06-27 18:20:28,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3077, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3360, PETRI_PLACES=265, PETRI_TRANSITIONS=294} [2024-06-27 18:20:28,652 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 210 predicate places. [2024-06-27 18:20:28,652 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 294 transitions, 3360 flow [2024-06-27 18:20:28,653 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 18:20:28,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:28,653 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 18:20:28,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 18:20:28,653 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:28,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1383865999, now seen corresponding path program 17 times [2024-06-27 18:20:28,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:28,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442026870] [2024-06-27 18:20:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:28,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:29,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:29,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442026870] [2024-06-27 18:20:29,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442026870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:29,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:29,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:20:29,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847935090] [2024-06-27 18:20:29,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:29,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:20:29,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:29,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:20:29,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:20:29,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:29,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 294 transitions, 3360 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 18:20:29,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:29,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:29,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:33,178 INFO L124 PetriNetUnfolderBase]: 8581/14020 cut-off events. [2024-06-27 18:20:33,178 INFO L125 PetriNetUnfolderBase]: For 1145515/1145515 co-relation queries the response was YES. [2024-06-27 18:20:33,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102771 conditions, 14020 events. 8581/14020 cut-off events. For 1145515/1145515 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 101094 event pairs, 2202 based on Foata normal form. 16/13758 useless extension candidates. Maximal degree in co-relation 102645. Up to 11036 conditions per place. [2024-06-27 18:20:33,384 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 253 selfloop transitions, 103 changer transitions 0/366 dead transitions. [2024-06-27 18:20:33,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 366 transitions, 4442 flow [2024-06-27 18:20:33,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:20:33,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:20:33,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 266 transitions. [2024-06-27 18:20:33,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-27 18:20:33,385 INFO L175 Difference]: Start difference. First operand has 265 places, 294 transitions, 3360 flow. Second operand 10 states and 266 transitions. [2024-06-27 18:20:33,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 366 transitions, 4442 flow [2024-06-27 18:20:34,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 366 transitions, 4191 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 18:20:34,633 INFO L231 Difference]: Finished difference. Result has 267 places, 295 transitions, 3399 flow [2024-06-27 18:20:34,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3109, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3399, PETRI_PLACES=267, PETRI_TRANSITIONS=295} [2024-06-27 18:20:34,634 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 212 predicate places. [2024-06-27 18:20:34,634 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 295 transitions, 3399 flow [2024-06-27 18:20:34,634 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 18:20:34,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:34,634 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 18:20:34,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 18:20:34,635 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:34,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:34,635 INFO L85 PathProgramCache]: Analyzing trace with hash 477356843, now seen corresponding path program 18 times [2024-06-27 18:20:34,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:34,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099855830] [2024-06-27 18:20:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:34,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:35,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:35,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099855830] [2024-06-27 18:20:35,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099855830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:35,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:35,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:20:35,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125886683] [2024-06-27 18:20:35,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:35,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:20:35,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:35,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:20:35,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:20:35,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:35,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 295 transitions, 3399 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 18:20:35,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:35,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:35,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:39,083 INFO L124 PetriNetUnfolderBase]: 8545/14034 cut-off events. [2024-06-27 18:20:39,083 INFO L125 PetriNetUnfolderBase]: For 1090633/1090633 co-relation queries the response was YES. [2024-06-27 18:20:39,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99749 conditions, 14034 events. 8545/14034 cut-off events. For 1090633/1090633 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 101913 event pairs, 2244 based on Foata normal form. 20/13755 useless extension candidates. Maximal degree in co-relation 99622. Up to 11410 conditions per place. [2024-06-27 18:20:39,269 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 240 selfloop transitions, 111 changer transitions 0/361 dead transitions. [2024-06-27 18:20:39,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 361 transitions, 4369 flow [2024-06-27 18:20:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:20:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:20:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 18:20:39,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265306122448979 [2024-06-27 18:20:39,270 INFO L175 Difference]: Start difference. First operand has 267 places, 295 transitions, 3399 flow. Second operand 10 states and 258 transitions. [2024-06-27 18:20:39,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 361 transitions, 4369 flow [2024-06-27 18:20:40,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 361 transitions, 4067 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 18:20:40,477 INFO L231 Difference]: Finished difference. Result has 269 places, 295 transitions, 3326 flow [2024-06-27 18:20:40,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3326, PETRI_PLACES=269, PETRI_TRANSITIONS=295} [2024-06-27 18:20:40,477 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 214 predicate places. [2024-06-27 18:20:40,477 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 295 transitions, 3326 flow [2024-06-27 18:20:40,478 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 18:20:40,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:40,478 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 18:20:40,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 18:20:40,478 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:40,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:40,478 INFO L85 PathProgramCache]: Analyzing trace with hash 973435051, now seen corresponding path program 19 times [2024-06-27 18:20:40,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:40,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404416287] [2024-06-27 18:20:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:40,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:41,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:41,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404416287] [2024-06-27 18:20:41,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404416287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:41,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:41,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:20:41,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535958176] [2024-06-27 18:20:41,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:41,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:20:41,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:20:41,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:20:41,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:41,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 295 transitions, 3326 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 18:20:41,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:41,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:41,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:45,061 INFO L124 PetriNetUnfolderBase]: 8675/14215 cut-off events. [2024-06-27 18:20:45,062 INFO L125 PetriNetUnfolderBase]: For 1078211/1078211 co-relation queries the response was YES. [2024-06-27 18:20:45,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99847 conditions, 14215 events. 8675/14215 cut-off events. For 1078211/1078211 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 103008 event pairs, 2222 based on Foata normal form. 16/13944 useless extension candidates. Maximal degree in co-relation 99719. Up to 11406 conditions per place. [2024-06-27 18:20:45,419 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 252 selfloop transitions, 105 changer transitions 0/367 dead transitions. [2024-06-27 18:20:45,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 367 transitions, 4412 flow [2024-06-27 18:20:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:20:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:20:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-06-27 18:20:45,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2024-06-27 18:20:45,421 INFO L175 Difference]: Start difference. First operand has 269 places, 295 transitions, 3326 flow. Second operand 10 states and 265 transitions. [2024-06-27 18:20:45,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 367 transitions, 4412 flow [2024-06-27 18:20:46,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 367 transitions, 4173 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 18:20:46,772 INFO L231 Difference]: Finished difference. Result has 270 places, 296 transitions, 3383 flow [2024-06-27 18:20:46,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3383, PETRI_PLACES=270, PETRI_TRANSITIONS=296} [2024-06-27 18:20:46,773 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 215 predicate places. [2024-06-27 18:20:46,773 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 296 transitions, 3383 flow [2024-06-27 18:20:46,773 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 18:20:46,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:46,773 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 18:20:46,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 18:20:46,774 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:46,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:46,774 INFO L85 PathProgramCache]: Analyzing trace with hash 961287829, now seen corresponding path program 20 times [2024-06-27 18:20:46,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:46,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764779187] [2024-06-27 18:20:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:46,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:47,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:47,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764779187] [2024-06-27 18:20:47,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764779187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:47,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:47,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:20:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392361635] [2024-06-27 18:20:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:47,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:20:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:47,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:20:47,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:20:47,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:47,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 296 transitions, 3383 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 18:20:47,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:47,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:47,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:51,371 INFO L124 PetriNetUnfolderBase]: 8715/14082 cut-off events. [2024-06-27 18:20:51,372 INFO L125 PetriNetUnfolderBase]: For 1089362/1089362 co-relation queries the response was YES. [2024-06-27 18:20:51,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100023 conditions, 14082 events. 8715/14082 cut-off events. For 1089362/1089362 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 100215 event pairs, 2109 based on Foata normal form. 16/13866 useless extension candidates. Maximal degree in co-relation 99894. Up to 9693 conditions per place. [2024-06-27 18:20:51,764 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 241 selfloop transitions, 117 changer transitions 0/368 dead transitions. [2024-06-27 18:20:51,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 368 transitions, 4469 flow [2024-06-27 18:20:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:20:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:20:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 18:20:51,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387755102040817 [2024-06-27 18:20:51,766 INFO L175 Difference]: Start difference. First operand has 270 places, 296 transitions, 3383 flow. Second operand 10 states and 264 transitions. [2024-06-27 18:20:51,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 368 transitions, 4469 flow [2024-06-27 18:20:53,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 368 transitions, 4193 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 18:20:53,080 INFO L231 Difference]: Finished difference. Result has 272 places, 297 transitions, 3429 flow [2024-06-27 18:20:53,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3429, PETRI_PLACES=272, PETRI_TRANSITIONS=297} [2024-06-27 18:20:53,081 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 217 predicate places. [2024-06-27 18:20:53,081 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 297 transitions, 3429 flow [2024-06-27 18:20:53,081 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 18:20:53,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:53,081 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 18:20:53,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 18:20:53,082 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 18:20:53,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1943898789, now seen corresponding path program 3 times [2024-06-27 18:20:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:53,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385010217] [2024-06-27 18:20:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:53,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:53,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:53,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385010217] [2024-06-27 18:20:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385010217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:53,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:53,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:20:53,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654187740] [2024-06-27 18:20:53,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:53,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:20:53,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:20:53,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:20:53,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:20:53,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 297 transitions, 3429 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 18:20:53,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:53,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:20:53,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:56,906 INFO L124 PetriNetUnfolderBase]: 8237/13694 cut-off events. [2024-06-27 18:20:56,907 INFO L125 PetriNetUnfolderBase]: For 1021295/1021318 co-relation queries the response was YES. [2024-06-27 18:20:57,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95397 conditions, 13694 events. 8237/13694 cut-off events. For 1021295/1021318 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 101372 event pairs, 2551 based on Foata normal form. 23/13317 useless extension candidates. Maximal degree in co-relation 95267. Up to 11887 conditions per place. [2024-06-27 18:20:57,101 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 265 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2024-06-27 18:20:57,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 324 transitions, 4086 flow [2024-06-27 18:20:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:20:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:20:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:20:57,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-06-27 18:20:57,103 INFO L175 Difference]: Start difference. First operand has 272 places, 297 transitions, 3429 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:20:57,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 324 transitions, 4086 flow [2024-06-27 18:20:58,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 324 transitions, 3752 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-27 18:20:58,116 INFO L231 Difference]: Finished difference. Result has 271 places, 298 transitions, 3158 flow [2024-06-27 18:20:58,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3158, PETRI_PLACES=271, PETRI_TRANSITIONS=298} [2024-06-27 18:20:58,117 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 216 predicate places. [2024-06-27 18:20:58,117 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 298 transitions, 3158 flow [2024-06-27 18:20:58,117 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 18:20:58,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:58,117 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 18:20:58,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 18:20:58,117 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 18:20:58,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:58,118 INFO L85 PathProgramCache]: Analyzing trace with hash -276355285, now seen corresponding path program 4 times [2024-06-27 18:20:58,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:58,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817065127] [2024-06-27 18:20:58,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:58,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:58,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:58,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817065127] [2024-06-27 18:20:58,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817065127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:58,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:58,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:20:58,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080272735] [2024-06-27 18:20:58,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:58,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:20:58,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:20:58,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:20:59,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:20:59,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 298 transitions, 3158 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 18:20:59,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:59,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:20:59,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:01,800 INFO L124 PetriNetUnfolderBase]: 8254/13717 cut-off events. [2024-06-27 18:21:01,800 INFO L125 PetriNetUnfolderBase]: For 996811/996834 co-relation queries the response was YES. [2024-06-27 18:21:01,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92717 conditions, 13717 events. 8254/13717 cut-off events. For 996811/996834 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 101452 event pairs, 2545 based on Foata normal form. 23/13340 useless extension candidates. Maximal degree in co-relation 92586. Up to 11881 conditions per place. [2024-06-27 18:21:01,982 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 259 selfloop transitions, 32 changer transitions 0/326 dead transitions. [2024-06-27 18:21:01,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 326 transitions, 3886 flow [2024-06-27 18:21:02,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:21:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:21:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:21:02,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014577259475219 [2024-06-27 18:21:02,154 INFO L175 Difference]: Start difference. First operand has 271 places, 298 transitions, 3158 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:21:02,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 326 transitions, 3886 flow [2024-06-27 18:21:03,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 326 transitions, 3845 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 18:21:03,332 INFO L231 Difference]: Finished difference. Result has 275 places, 301 transitions, 3259 flow [2024-06-27 18:21:03,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3117, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3259, PETRI_PLACES=275, PETRI_TRANSITIONS=301} [2024-06-27 18:21:03,333 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 220 predicate places. [2024-06-27 18:21:03,333 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 301 transitions, 3259 flow [2024-06-27 18:21:03,333 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 18:21:03,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:03,333 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 18:21:03,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 18:21:03,334 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:03,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:03,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1390546003, now seen corresponding path program 2 times [2024-06-27 18:21:03,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:03,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611303787] [2024-06-27 18:21:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:03,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat