./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix011.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/mix011.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix011.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:57:22,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:57:22,659 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:57:22,663 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:57:22,663 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:57:22,684 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:57:22,686 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:57:22,686 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:57:22,686 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:57:22,689 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:57:22,690 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:57:22,690 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:57:22,691 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:57:22,692 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:57:22,692 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:57:22,692 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:57:22,692 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:57:22,693 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:57:22,693 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:57:22,693 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:57:22,693 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:57:22,694 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:57:22,694 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:57:22,694 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:57:22,694 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:57:22,694 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:57:22,694 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:57:22,695 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:57:22,695 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:57:22,695 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:57:22,696 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:57:22,696 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:57:22,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:57:22,697 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:57:22,697 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:57:22,697 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:57:22,697 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:57:22,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:57:22,698 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:57:22,698 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:57:22,698 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:57:22,698 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:57:22,698 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:57:22,698 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 02:57:22,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:57:22,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:57:22,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:57:22,930 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:57:22,931 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:57:22,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-28 02:57:23,963 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:57:24,167 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:57:24,168 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-28 02:57:24,178 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/329f8981f/5a0c981b66ee4d06b0a6416e93feb086/FLAG388de53cd [2024-06-28 02:57:24,188 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/329f8981f/5a0c981b66ee4d06b0a6416e93feb086 [2024-06-28 02:57:24,190 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:57:24,190 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:57:24,191 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix011.opt.yml/witness.yml [2024-06-28 02:57:24,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:57:24,332 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:57:24,333 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:57:24,333 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:57:24,337 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:57:24,337 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:57:24" (1/2) ... [2024-06-28 02:57:24,338 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be186e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:57:24, skipping insertion in model container [2024-06-28 02:57:24,338 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:57:24" (1/2) ... [2024-06-28 02:57:24,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@651ecc75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:57:24, skipping insertion in model container [2024-06-28 02:57:24,339 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:57:24" (2/2) ... [2024-06-28 02:57:24,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be186e7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24, skipping insertion in model container [2024-06-28 02:57:24,340 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:57:24" (2/2) ... [2024-06-28 02:57:24,340 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:57:24,409 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:57:24,410 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((! multithreaded || z$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-28 02:57:24,410 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((! multithreaded || z$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-28 02:57:24,410 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || z$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-28 02:57:24,411 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:57:24,411 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-28 02:57:24,447 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:57:24,760 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:57:24,769 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:57:24,861 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:57:24,889 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:57:24,889 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24 WrapperNode [2024-06-28 02:57:24,890 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:57:24,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:57:24,891 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:57:24,891 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:57:24,895 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 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:24,916 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 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:24,952 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 150 [2024-06-28 02:57:24,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:57:24,953 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:57:24,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:57:24,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:57:24,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:24,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:24,965 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:24,979 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]. [2024-06-28 02:57:24,979 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:24,979 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:24,994 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:24,996 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:24,998 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:24,999 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:25,002 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:57:25,003 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:57:25,003 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:57:25,003 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:57:25,004 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24" (1/1) ... [2024-06-28 02:57:25,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:57:25,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:57:25,032 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) [2024-06-28 02:57:25,077 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 [2024-06-28 02:57:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:57:25,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:57:25,134 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:57:25,134 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:57:25,134 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:57:25,135 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:57:25,135 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:57:25,135 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:57:25,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:57:25,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:57:25,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:57:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:57:25,137 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:57:25,277 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:57:25,278 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:57:25,642 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:57:25,642 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:57:25,770 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:57:25,770 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:57:25,772 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:57:25 BoogieIcfgContainer [2024-06-28 02:57:25,772 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:57:25,775 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:57:25,775 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:57:25,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:57:25,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:57:24" (1/4) ... [2024-06-28 02:57:25,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b81823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:57:25, skipping insertion in model container [2024-06-28 02:57:25,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:57:24" (2/4) ... [2024-06-28 02:57:25,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b81823 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:57:25, skipping insertion in model container [2024-06-28 02:57:25,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:57:24" (3/4) ... [2024-06-28 02:57:25,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b81823 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:57:25, skipping insertion in model container [2024-06-28 02:57:25,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:57:25" (4/4) ... [2024-06-28 02:57:25,780 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011.opt.i [2024-06-28 02:57:25,793 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:57:25,793 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 02:57:25,793 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:57:25,833 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:57:25,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 02:57:25,882 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-28 02:57:25,882 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:57:25,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 02:57:25,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 02:57:25,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-28 02:57:25,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:57:25,897 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;@5cd3597b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:57:25,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 02:57:25,900 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:57:25,901 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:57:25,901 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:57:25,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:25,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:57:25,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:25,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash 401253807, now seen corresponding path program 1 times [2024-06-28 02:57:25,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:25,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896307650] [2024-06-28 02:57:25,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:25,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:27,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:27,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896307650] [2024-06-28 02:57:27,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896307650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:27,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:27,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:57:27,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393194865] [2024-06-28 02:57:27,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:27,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:57:27,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:57:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:57:27,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-28 02:57:27,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:27,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:27,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-28 02:57:27,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:27,473 INFO L124 PetriNetUnfolderBase]: 1359/2139 cut-off events. [2024-06-28 02:57:27,473 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 02:57:27,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4253 conditions, 2139 events. 1359/2139 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10954 event pairs, 941 based on Foata normal form. 1/2060 useless extension candidates. Maximal degree in co-relation 4241. Up to 2029 conditions per place. [2024-06-28 02:57:27,489 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-28 02:57:27,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-28 02:57:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:57:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:57:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-28 02:57:27,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-28 02:57:27,500 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-28 02:57:27,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-28 02:57:27,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:57:27,504 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-28 02:57:27,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-28 02:57:27,508 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-28 02:57:27,509 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-28 02:57:27,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:27,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:27,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:27,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:57:27,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:27,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:27,510 INFO L85 PathProgramCache]: Analyzing trace with hash -942118130, now seen corresponding path program 1 times [2024-06-28 02:57:27,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:27,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679659280] [2024-06-28 02:57:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:27,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:28,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:28,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679659280] [2024-06-28 02:57:28,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679659280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:28,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:28,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:57:28,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884731139] [2024-06-28 02:57:28,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:28,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:57:28,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:57:28,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:57:28,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-28 02:57:28,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:28,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:28,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-28 02:57:28,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:28,799 INFO L124 PetriNetUnfolderBase]: 1560/2387 cut-off events. [2024-06-28 02:57:28,800 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2024-06-28 02:57:28,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 2387 events. 1560/2387 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11952 event pairs, 930 based on Foata normal form. 3/2377 useless extension candidates. Maximal degree in co-relation 5391. Up to 2302 conditions per place. [2024-06-28 02:57:28,812 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-28 02:57:28,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-28 02:57:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:57:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:57:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-28 02:57:28,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-28 02:57:28,814 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-28 02:57:28,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-28 02:57:28,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:57:28,816 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-28 02:57:28,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-28 02:57:28,855 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-28 02:57:28,855 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-28 02:57:28,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:28,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:28,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:28,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:57:28,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:28,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash 859110040, now seen corresponding path program 1 times [2024-06-28 02:57:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:28,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285687126] [2024-06-28 02:57:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:28,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:29,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:29,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285687126] [2024-06-28 02:57:29,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285687126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:29,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:29,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:57:29,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954396192] [2024-06-28 02:57:29,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:29,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:57:29,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:57:29,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:57:30,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-28 02:57:30,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:30,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:30,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-28 02:57:30,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:30,325 INFO L124 PetriNetUnfolderBase]: 1568/2455 cut-off events. [2024-06-28 02:57:30,326 INFO L125 PetriNetUnfolderBase]: For 1364/1364 co-relation queries the response was YES. [2024-06-28 02:57:30,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6088 conditions, 2455 events. 1568/2455 cut-off events. For 1364/1364 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12627 event pairs, 669 based on Foata normal form. 5/2454 useless extension candidates. Maximal degree in co-relation 6074. Up to 2248 conditions per place. [2024-06-28 02:57:30,339 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-28 02:57:30,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 398 flow [2024-06-28 02:57:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:57:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:57:30,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-28 02:57:30,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186046511627907 [2024-06-28 02:57:30,341 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 133 transitions. [2024-06-28 02:57:30,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 398 flow [2024-06-28 02:57:30,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 02:57:30,344 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-28 02:57:30,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-28 02:57:30,345 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-28 02:57:30,345 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-28 02:57:30,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:30,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:30,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:30,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:57:30,346 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:30,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:30,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1607346961, now seen corresponding path program 1 times [2024-06-28 02:57:30,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:30,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981049939] [2024-06-28 02:57:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:30,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:31,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:31,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981049939] [2024-06-28 02:57:31,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981049939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:31,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:31,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:57:31,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706753641] [2024-06-28 02:57:31,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:31,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:57:31,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:31,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:57:31,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:57:31,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-28 02:57:31,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:31,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:31,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-28 02:57:31,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:32,087 INFO L124 PetriNetUnfolderBase]: 1580/2475 cut-off events. [2024-06-28 02:57:32,087 INFO L125 PetriNetUnfolderBase]: For 3227/3230 co-relation queries the response was YES. [2024-06-28 02:57:32,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7232 conditions, 2475 events. 1580/2475 cut-off events. For 3227/3230 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12769 event pairs, 481 based on Foata normal form. 12/2481 useless extension candidates. Maximal degree in co-relation 7215. Up to 2216 conditions per place. [2024-06-28 02:57:32,100 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-28 02:57:32,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 501 flow [2024-06-28 02:57:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:57:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:57:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-28 02:57:32,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-28 02:57:32,102 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 153 transitions. [2024-06-28 02:57:32,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 501 flow [2024-06-28 02:57:32,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 493 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 02:57:32,105 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 295 flow [2024-06-28 02:57:32,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-28 02:57:32,106 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-28 02:57:32,106 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 295 flow [2024-06-28 02:57:32,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:32,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:32,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:32,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:57:32,107 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:32,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:32,107 INFO L85 PathProgramCache]: Analyzing trace with hash 503880689, now seen corresponding path program 1 times [2024-06-28 02:57:32,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:32,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792619911] [2024-06-28 02:57:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:32,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:32,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:32,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792619911] [2024-06-28 02:57:32,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792619911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:32,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:32,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:57:32,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357718436] [2024-06-28 02:57:32,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:32,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:57:32,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:32,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:57:32,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:57:32,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 02:57:32,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:32,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:32,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 02:57:32,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:33,102 INFO L124 PetriNetUnfolderBase]: 1368/2206 cut-off events. [2024-06-28 02:57:33,102 INFO L125 PetriNetUnfolderBase]: For 4097/4097 co-relation queries the response was YES. [2024-06-28 02:57:33,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6977 conditions, 2206 events. 1368/2206 cut-off events. For 4097/4097 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11678 event pairs, 562 based on Foata normal form. 2/2185 useless extension candidates. Maximal degree in co-relation 6956. Up to 2036 conditions per place. [2024-06-28 02:57:33,116 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-06-28 02:57:33,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 437 flow [2024-06-28 02:57:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:57:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:57:33,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-28 02:57:33,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-28 02:57:33,118 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 295 flow. Second operand 5 states and 105 transitions. [2024-06-28 02:57:33,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 437 flow [2024-06-28 02:57:33,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 387 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 02:57:33,122 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 269 flow [2024-06-28 02:57:33,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-28 02:57:33,123 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-28 02:57:33,123 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 269 flow [2024-06-28 02:57:33,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:33,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:33,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:33,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:57:33,124 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:33,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1599265881, now seen corresponding path program 1 times [2024-06-28 02:57:33,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:33,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869225714] [2024-06-28 02:57:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:33,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:33,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:33,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869225714] [2024-06-28 02:57:33,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869225714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:33,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:33,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:57:33,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439471363] [2024-06-28 02:57:33,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:33,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:57:33,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:57:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:57:33,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:57:33,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:33,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:33,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:57:33,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:34,284 INFO L124 PetriNetUnfolderBase]: 1606/2532 cut-off events. [2024-06-28 02:57:34,285 INFO L125 PetriNetUnfolderBase]: For 5550/5550 co-relation queries the response was YES. [2024-06-28 02:57:34,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8032 conditions, 2532 events. 1606/2532 cut-off events. For 5550/5550 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13048 event pairs, 676 based on Foata normal form. 2/2523 useless extension candidates. Maximal degree in co-relation 8009. Up to 2373 conditions per place. [2024-06-28 02:57:34,301 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 54 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-28 02:57:34,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 455 flow [2024-06-28 02:57:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:57:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:57:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-28 02:57:34,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-28 02:57:34,303 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 269 flow. Second operand 6 states and 119 transitions. [2024-06-28 02:57:34,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 455 flow [2024-06-28 02:57:34,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 433 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 02:57:34,308 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 301 flow [2024-06-28 02:57:34,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=301, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-28 02:57:34,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-28 02:57:34,309 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 301 flow [2024-06-28 02:57:34,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:34,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:34,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:34,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:57:34,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:34,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:34,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1026778578, now seen corresponding path program 1 times [2024-06-28 02:57:34,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:34,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644253209] [2024-06-28 02:57:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:34,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:34,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644253209] [2024-06-28 02:57:34,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644253209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:34,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:34,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:57:34,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465895153] [2024-06-28 02:57:34,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:34,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:57:34,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:34,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:57:34,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:57:34,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:57:34,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 301 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:34,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:34,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:57:34,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:35,587 INFO L124 PetriNetUnfolderBase]: 1745/2695 cut-off events. [2024-06-28 02:57:35,587 INFO L125 PetriNetUnfolderBase]: For 8633/8639 co-relation queries the response was YES. [2024-06-28 02:57:35,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9313 conditions, 2695 events. 1745/2695 cut-off events. For 8633/8639 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13692 event pairs, 726 based on Foata normal form. 8/2696 useless extension candidates. Maximal degree in co-relation 9290. Up to 2505 conditions per place. [2024-06-28 02:57:35,604 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 19 changer transitions 0/79 dead transitions. [2024-06-28 02:57:35,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 79 transitions, 541 flow [2024-06-28 02:57:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:57:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:57:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-28 02:57:35,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-28 02:57:35,606 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 301 flow. Second operand 6 states and 128 transitions. [2024-06-28 02:57:35,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 79 transitions, 541 flow [2024-06-28 02:57:35,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 511 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 02:57:35,611 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 343 flow [2024-06-28 02:57:35,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-28 02:57:35,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-28 02:57:35,612 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 343 flow [2024-06-28 02:57:35,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:35,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:35,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:35,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:57:35,613 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:35,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:35,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1101942896, now seen corresponding path program 2 times [2024-06-28 02:57:35,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:35,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523209187] [2024-06-28 02:57:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:35,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:36,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:36,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523209187] [2024-06-28 02:57:36,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523209187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:36,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:36,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:57:36,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532877661] [2024-06-28 02:57:36,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:36,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:57:36,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:57:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:57:36,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:57:36,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:36,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:36,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:57:36,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:36,860 INFO L124 PetriNetUnfolderBase]: 1733/2668 cut-off events. [2024-06-28 02:57:36,861 INFO L125 PetriNetUnfolderBase]: For 10399/10405 co-relation queries the response was YES. [2024-06-28 02:57:36,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9549 conditions, 2668 events. 1733/2668 cut-off events. For 10399/10405 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13484 event pairs, 740 based on Foata normal form. 3/2659 useless extension candidates. Maximal degree in co-relation 9525. Up to 2489 conditions per place. [2024-06-28 02:57:36,876 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 47 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2024-06-28 02:57:36,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 515 flow [2024-06-28 02:57:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:57:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:57:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-28 02:57:36,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-28 02:57:36,878 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 343 flow. Second operand 6 states and 124 transitions. [2024-06-28 02:57:36,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 515 flow [2024-06-28 02:57:36,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 486 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 02:57:36,884 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 362 flow [2024-06-28 02:57:36,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-28 02:57:36,885 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-28 02:57:36,885 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 362 flow [2024-06-28 02:57:36,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:36,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:36,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:36,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:57:36,886 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:36,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:36,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1962366126, now seen corresponding path program 1 times [2024-06-28 02:57:36,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:36,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109244316] [2024-06-28 02:57:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:36,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:37,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:37,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109244316] [2024-06-28 02:57:37,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109244316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:37,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:37,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:37,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487042315] [2024-06-28 02:57:37,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:37,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:37,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:37,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:37,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:37,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:57:37,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 362 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-28 02:57:37,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:37,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:57:37,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:38,181 INFO L124 PetriNetUnfolderBase]: 1590/2516 cut-off events. [2024-06-28 02:57:38,181 INFO L125 PetriNetUnfolderBase]: For 10273/10273 co-relation queries the response was YES. [2024-06-28 02:57:38,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9018 conditions, 2516 events. 1590/2516 cut-off events. For 10273/10273 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12963 event pairs, 634 based on Foata normal form. 4/2506 useless extension candidates. Maximal degree in co-relation 8993. Up to 2330 conditions per place. [2024-06-28 02:57:38,195 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 62 selfloop transitions, 14 changer transitions 0/82 dead transitions. [2024-06-28 02:57:38,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 82 transitions, 586 flow [2024-06-28 02:57:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:57:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:57:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 02:57:38,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-28 02:57:38,197 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 362 flow. Second operand 7 states and 138 transitions. [2024-06-28 02:57:38,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 82 transitions, 586 flow [2024-06-28 02:57:38,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 521 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 02:57:38,205 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 361 flow [2024-06-28 02:57:38,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-28 02:57:38,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-28 02:57:38,206 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 361 flow [2024-06-28 02:57:38,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-28 02:57:38,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:38,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:38,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:57:38,206 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:38,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:38,207 INFO L85 PathProgramCache]: Analyzing trace with hash 526431080, now seen corresponding path program 1 times [2024-06-28 02:57:38,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:38,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858901502] [2024-06-28 02:57:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:38,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:38,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:38,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858901502] [2024-06-28 02:57:38,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858901502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:38,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:38,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:38,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570848115] [2024-06-28 02:57:38,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:38,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:38,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:38,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:38,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:57:38,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:38,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:38,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:57:38,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:39,528 INFO L124 PetriNetUnfolderBase]: 1856/2802 cut-off events. [2024-06-28 02:57:39,528 INFO L125 PetriNetUnfolderBase]: For 14900/14906 co-relation queries the response was YES. [2024-06-28 02:57:39,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10783 conditions, 2802 events. 1856/2802 cut-off events. For 14900/14906 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13775 event pairs, 731 based on Foata normal form. 5/2803 useless extension candidates. Maximal degree in co-relation 10757. Up to 2601 conditions per place. [2024-06-28 02:57:39,542 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 63 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-28 02:57:39,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 691 flow [2024-06-28 02:57:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:57:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:57:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-28 02:57:39,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-28 02:57:39,544 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 361 flow. Second operand 7 states and 143 transitions. [2024-06-28 02:57:39,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 691 flow [2024-06-28 02:57:39,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 651 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 02:57:39,550 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 440 flow [2024-06-28 02:57:39,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=440, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-28 02:57:39,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-28 02:57:39,551 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 440 flow [2024-06-28 02:57:39,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:39,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:39,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:39,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:57:39,552 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:39,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash 199746596, now seen corresponding path program 2 times [2024-06-28 02:57:39,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:39,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864179563] [2024-06-28 02:57:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:39,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:40,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:40,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864179563] [2024-06-28 02:57:40,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864179563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:40,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:40,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:40,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263426717] [2024-06-28 02:57:40,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:40,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:40,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:40,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:40,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:40,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:57:40,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 440 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:40,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:40,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:57:40,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:40,816 INFO L124 PetriNetUnfolderBase]: 1867/2815 cut-off events. [2024-06-28 02:57:40,816 INFO L125 PetriNetUnfolderBase]: For 18516/18522 co-relation queries the response was YES. [2024-06-28 02:57:40,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11653 conditions, 2815 events. 1867/2815 cut-off events. For 18516/18522 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13848 event pairs, 745 based on Foata normal form. 3/2807 useless extension candidates. Maximal degree in co-relation 11626. Up to 2608 conditions per place. [2024-06-28 02:57:40,832 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 59 selfloop transitions, 34 changer transitions 0/98 dead transitions. [2024-06-28 02:57:40,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 822 flow [2024-06-28 02:57:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:57:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:57:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-28 02:57:40,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-28 02:57:40,835 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 440 flow. Second operand 7 states and 143 transitions. [2024-06-28 02:57:40,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 822 flow [2024-06-28 02:57:40,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 786 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 02:57:40,845 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 542 flow [2024-06-28 02:57:40,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-28 02:57:40,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-28 02:57:40,845 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 542 flow [2024-06-28 02:57:40,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:40,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:40,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:40,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:57:40,846 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:40,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash 703562600, now seen corresponding path program 3 times [2024-06-28 02:57:40,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:40,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859981669] [2024-06-28 02:57:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:40,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:41,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:41,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859981669] [2024-06-28 02:57:41,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859981669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:41,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:41,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:41,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140040389] [2024-06-28 02:57:41,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:41,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:41,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:41,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:41,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:41,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:57:41,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:41,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:41,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:57:41,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:42,197 INFO L124 PetriNetUnfolderBase]: 1862/2808 cut-off events. [2024-06-28 02:57:42,198 INFO L125 PetriNetUnfolderBase]: For 21860/21866 co-relation queries the response was YES. [2024-06-28 02:57:42,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12123 conditions, 2808 events. 1862/2808 cut-off events. For 21860/21866 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13802 event pairs, 745 based on Foata normal form. 3/2800 useless extension candidates. Maximal degree in co-relation 12094. Up to 2605 conditions per place. [2024-06-28 02:57:42,214 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 58 selfloop transitions, 33 changer transitions 0/96 dead transitions. [2024-06-28 02:57:42,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 96 transitions, 820 flow [2024-06-28 02:57:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:57:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:57:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-28 02:57:42,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-28 02:57:42,216 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 542 flow. Second operand 7 states and 141 transitions. [2024-06-28 02:57:42,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 96 transitions, 820 flow [2024-06-28 02:57:42,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 758 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 02:57:42,233 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 554 flow [2024-06-28 02:57:42,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=554, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-06-28 02:57:42,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-28 02:57:42,234 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 554 flow [2024-06-28 02:57:42,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:42,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:42,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:42,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:57:42,235 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:42,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash 376619089, now seen corresponding path program 1 times [2024-06-28 02:57:42,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:42,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232361925] [2024-06-28 02:57:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:42,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:42,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:42,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232361925] [2024-06-28 02:57:42,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232361925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:42,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:42,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:57:42,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639160889] [2024-06-28 02:57:42,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:42,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:57:42,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:42,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:57:42,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:57:43,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 02:57:43,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 554 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:43,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:43,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 02:57:43,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:43,342 INFO L124 PetriNetUnfolderBase]: 1534/2473 cut-off events. [2024-06-28 02:57:43,342 INFO L125 PetriNetUnfolderBase]: For 20486/20486 co-relation queries the response was YES. [2024-06-28 02:57:43,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10554 conditions, 2473 events. 1534/2473 cut-off events. For 20486/20486 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13040 event pairs, 581 based on Foata normal form. 1/2471 useless extension candidates. Maximal degree in co-relation 10523. Up to 2252 conditions per place. [2024-06-28 02:57:43,357 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 66 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2024-06-28 02:57:43,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 86 transitions, 744 flow [2024-06-28 02:57:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:57:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:57:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-28 02:57:43,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-28 02:57:43,358 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 554 flow. Second operand 5 states and 101 transitions. [2024-06-28 02:57:43,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 86 transitions, 744 flow [2024-06-28 02:57:43,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 663 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 02:57:43,371 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 523 flow [2024-06-28 02:57:43,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=523, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-28 02:57:43,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-28 02:57:43,372 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 523 flow [2024-06-28 02:57:43,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:43,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:43,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:43,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:57:43,373 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:43,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:43,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291981, now seen corresponding path program 1 times [2024-06-28 02:57:43,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:43,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990342718] [2024-06-28 02:57:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:43,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:44,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:44,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990342718] [2024-06-28 02:57:44,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990342718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:44,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:44,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:57:44,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182275896] [2024-06-28 02:57:44,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:44,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:57:44,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:57:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:57:44,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:57:44,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 523 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:44,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:44,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:57:44,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:44,916 INFO L124 PetriNetUnfolderBase]: 1903/2881 cut-off events. [2024-06-28 02:57:44,916 INFO L125 PetriNetUnfolderBase]: For 27730/27733 co-relation queries the response was YES. [2024-06-28 02:57:44,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12922 conditions, 2881 events. 1903/2881 cut-off events. For 27730/27733 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14341 event pairs, 642 based on Foata normal form. 8/2885 useless extension candidates. Maximal degree in co-relation 12890. Up to 2522 conditions per place. [2024-06-28 02:57:44,932 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 76 selfloop transitions, 36 changer transitions 0/117 dead transitions. [2024-06-28 02:57:44,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 117 transitions, 941 flow [2024-06-28 02:57:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:57:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:57:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 02:57:44,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-28 02:57:44,934 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 523 flow. Second operand 8 states and 166 transitions. [2024-06-28 02:57:44,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 117 transitions, 941 flow [2024-06-28 02:57:44,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 117 transitions, 913 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 02:57:44,947 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 644 flow [2024-06-28 02:57:44,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-28 02:57:44,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-28 02:57:44,948 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 644 flow [2024-06-28 02:57:44,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:44,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:44,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:44,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:57:44,949 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:44,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1740222124, now seen corresponding path program 1 times [2024-06-28 02:57:44,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:44,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448702959] [2024-06-28 02:57:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:44,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:45,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:45,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448702959] [2024-06-28 02:57:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448702959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:45,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:45,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:45,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300282208] [2024-06-28 02:57:45,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:45,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:45,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:45,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:57:45,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 644 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:45,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:45,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:57:45,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:46,288 INFO L124 PetriNetUnfolderBase]: 1914/2902 cut-off events. [2024-06-28 02:57:46,289 INFO L125 PetriNetUnfolderBase]: For 32075/32078 co-relation queries the response was YES. [2024-06-28 02:57:46,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13939 conditions, 2902 events. 1914/2902 cut-off events. For 32075/32078 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14412 event pairs, 696 based on Foata normal form. 2/2900 useless extension candidates. Maximal degree in co-relation 13906. Up to 2677 conditions per place. [2024-06-28 02:57:46,305 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 74 selfloop transitions, 36 changer transitions 0/115 dead transitions. [2024-06-28 02:57:46,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 115 transitions, 1024 flow [2024-06-28 02:57:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:57:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:57:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 02:57:46,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-28 02:57:46,306 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 644 flow. Second operand 7 states and 146 transitions. [2024-06-28 02:57:46,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 115 transitions, 1024 flow [2024-06-28 02:57:46,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 975 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 02:57:46,326 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 713 flow [2024-06-28 02:57:46,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=713, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-06-28 02:57:46,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-28 02:57:46,327 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 713 flow [2024-06-28 02:57:46,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:46,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:46,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:46,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:57:46,328 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:46,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:46,328 INFO L85 PathProgramCache]: Analyzing trace with hash -26630006, now seen corresponding path program 2 times [2024-06-28 02:57:46,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:46,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522239838] [2024-06-28 02:57:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:46,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:46,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:46,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522239838] [2024-06-28 02:57:46,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522239838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:46,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:46,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:46,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991261061] [2024-06-28 02:57:46,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:46,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:46,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:47,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:57:47,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 713 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:47,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:47,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:57:47,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:47,684 INFO L124 PetriNetUnfolderBase]: 1925/2923 cut-off events. [2024-06-28 02:57:47,684 INFO L125 PetriNetUnfolderBase]: For 36178/36181 co-relation queries the response was YES. [2024-06-28 02:57:47,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14340 conditions, 2923 events. 1925/2923 cut-off events. For 36178/36181 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14551 event pairs, 696 based on Foata normal form. 2/2921 useless extension candidates. Maximal degree in co-relation 14305. Up to 2689 conditions per place. [2024-06-28 02:57:47,698 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 36 changer transitions 0/115 dead transitions. [2024-06-28 02:57:47,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 115 transitions, 1095 flow [2024-06-28 02:57:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:57:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:57:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 02:57:47,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-28 02:57:47,700 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 713 flow. Second operand 7 states and 142 transitions. [2024-06-28 02:57:47,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 115 transitions, 1095 flow [2024-06-28 02:57:47,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 975 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 02:57:47,724 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 718 flow [2024-06-28 02:57:47,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=718, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2024-06-28 02:57:47,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-28 02:57:47,725 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 718 flow [2024-06-28 02:57:47,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:47,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:47,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:47,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:57:47,725 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:47,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:47,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1897444975, now seen corresponding path program 2 times [2024-06-28 02:57:47,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:47,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050972546] [2024-06-28 02:57:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:47,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:48,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:48,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050972546] [2024-06-28 02:57:48,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050972546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:48,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:48,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:57:48,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938107937] [2024-06-28 02:57:48,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:48,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:57:48,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:48,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:57:48,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:57:48,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:57:48,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:48,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:48,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:57:48,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:49,263 INFO L124 PetriNetUnfolderBase]: 1947/2944 cut-off events. [2024-06-28 02:57:49,263 INFO L125 PetriNetUnfolderBase]: For 40476/40482 co-relation queries the response was YES. [2024-06-28 02:57:49,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14696 conditions, 2944 events. 1947/2944 cut-off events. For 40476/40482 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14597 event pairs, 662 based on Foata normal form. 5/2936 useless extension candidates. Maximal degree in co-relation 14661. Up to 2545 conditions per place. [2024-06-28 02:57:49,279 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 70 selfloop transitions, 52 changer transitions 0/127 dead transitions. [2024-06-28 02:57:49,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 127 transitions, 1226 flow [2024-06-28 02:57:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:57:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:57:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 02:57:49,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-28 02:57:49,281 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 718 flow. Second operand 8 states and 166 transitions. [2024-06-28 02:57:49,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 127 transitions, 1226 flow [2024-06-28 02:57:49,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1160 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 02:57:49,305 INFO L231 Difference]: Finished difference. Result has 88 places, 97 transitions, 834 flow [2024-06-28 02:57:49,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=834, PETRI_PLACES=88, PETRI_TRANSITIONS=97} [2024-06-28 02:57:49,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-28 02:57:49,305 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 97 transitions, 834 flow [2024-06-28 02:57:49,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:49,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:49,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:49,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:57:49,306 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:49,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1252182511, now seen corresponding path program 3 times [2024-06-28 02:57:49,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:49,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889040956] [2024-06-28 02:57:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:49,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:50,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:50,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889040956] [2024-06-28 02:57:50,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889040956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:50,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:50,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:57:50,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923533864] [2024-06-28 02:57:50,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:50,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:57:50,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:50,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:57:50,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:57:50,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:57:50,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 97 transitions, 834 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:50,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:50,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:57:50,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:50,861 INFO L124 PetriNetUnfolderBase]: 1969/2978 cut-off events. [2024-06-28 02:57:50,862 INFO L125 PetriNetUnfolderBase]: For 45938/45944 co-relation queries the response was YES. [2024-06-28 02:57:50,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15413 conditions, 2978 events. 1969/2978 cut-off events. For 45938/45944 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14827 event pairs, 660 based on Foata normal form. 5/2968 useless extension candidates. Maximal degree in co-relation 15377. Up to 2554 conditions per place. [2024-06-28 02:57:50,878 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 74 selfloop transitions, 52 changer transitions 0/131 dead transitions. [2024-06-28 02:57:50,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 131 transitions, 1332 flow [2024-06-28 02:57:50,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:57:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:57:50,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 02:57:50,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-28 02:57:50,894 INFO L175 Difference]: Start difference. First operand has 88 places, 97 transitions, 834 flow. Second operand 8 states and 167 transitions. [2024-06-28 02:57:50,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 131 transitions, 1332 flow [2024-06-28 02:57:50,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 131 transitions, 1238 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 02:57:50,925 INFO L231 Difference]: Finished difference. Result has 92 places, 100 transitions, 892 flow [2024-06-28 02:57:50,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=892, PETRI_PLACES=92, PETRI_TRANSITIONS=100} [2024-06-28 02:57:50,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-28 02:57:50,926 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 100 transitions, 892 flow [2024-06-28 02:57:50,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:50,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:50,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:50,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:57:50,927 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:50,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:50,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1116836278, now seen corresponding path program 3 times [2024-06-28 02:57:50,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:50,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361460516] [2024-06-28 02:57:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:50,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:51,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:51,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361460516] [2024-06-28 02:57:51,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361460516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:51,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:51,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:51,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930446658] [2024-06-28 02:57:51,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:51,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:51,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:51,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:51,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:51,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:57:51,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 100 transitions, 892 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:51,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:51,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:57:51,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:52,342 INFO L124 PetriNetUnfolderBase]: 1964/2985 cut-off events. [2024-06-28 02:57:52,343 INFO L125 PetriNetUnfolderBase]: For 49622/49631 co-relation queries the response was YES. [2024-06-28 02:57:52,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15505 conditions, 2985 events. 1964/2985 cut-off events. For 49622/49631 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14902 event pairs, 717 based on Foata normal form. 5/2981 useless extension candidates. Maximal degree in co-relation 15467. Up to 2748 conditions per place. [2024-06-28 02:57:52,359 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 80 selfloop transitions, 34 changer transitions 0/119 dead transitions. [2024-06-28 02:57:52,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 119 transitions, 1168 flow [2024-06-28 02:57:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:57:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:57:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 02:57:52,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-28 02:57:52,360 INFO L175 Difference]: Start difference. First operand has 92 places, 100 transitions, 892 flow. Second operand 7 states and 136 transitions. [2024-06-28 02:57:52,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 119 transitions, 1168 flow [2024-06-28 02:57:52,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 119 transitions, 1052 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 02:57:52,390 INFO L231 Difference]: Finished difference. Result has 94 places, 100 transitions, 852 flow [2024-06-28 02:57:52,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=852, PETRI_PLACES=94, PETRI_TRANSITIONS=100} [2024-06-28 02:57:52,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-28 02:57:52,391 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 100 transitions, 852 flow [2024-06-28 02:57:52,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:52,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:52,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:52,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:57:52,392 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:52,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1897178065, now seen corresponding path program 4 times [2024-06-28 02:57:52,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:52,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515924397] [2024-06-28 02:57:52,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:52,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:53,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:53,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515924397] [2024-06-28 02:57:53,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515924397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:53,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:53,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:57:53,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548098905] [2024-06-28 02:57:53,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:57:53,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:53,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:57:53,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:57:53,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:57:53,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 100 transitions, 852 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:53,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:53,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:57:53,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:53,914 INFO L124 PetriNetUnfolderBase]: 1954/2960 cut-off events. [2024-06-28 02:57:53,914 INFO L125 PetriNetUnfolderBase]: For 53330/53336 co-relation queries the response was YES. [2024-06-28 02:57:53,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15443 conditions, 2960 events. 1954/2960 cut-off events. For 53330/53336 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14739 event pairs, 660 based on Foata normal form. 5/2952 useless extension candidates. Maximal degree in co-relation 15404. Up to 2547 conditions per place. [2024-06-28 02:57:53,931 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 71 selfloop transitions, 53 changer transitions 0/129 dead transitions. [2024-06-28 02:57:53,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 129 transitions, 1244 flow [2024-06-28 02:57:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:57:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:57:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-28 02:57:53,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-28 02:57:53,932 INFO L175 Difference]: Start difference. First operand has 94 places, 100 transitions, 852 flow. Second operand 8 states and 165 transitions. [2024-06-28 02:57:53,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 129 transitions, 1244 flow [2024-06-28 02:57:53,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 129 transitions, 1125 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 02:57:53,973 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 847 flow [2024-06-28 02:57:53,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=847, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-06-28 02:57:53,973 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-28 02:57:53,974 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 847 flow [2024-06-28 02:57:53,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:53,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:53,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:53,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:57:53,974 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:53,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1168597567, now seen corresponding path program 1 times [2024-06-28 02:57:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:53,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035603088] [2024-06-28 02:57:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:53,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:54,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:54,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035603088] [2024-06-28 02:57:54,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035603088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:54,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:54,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:57:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649556769] [2024-06-28 02:57:54,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:54,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:57:54,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:54,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:57:54,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:57:55,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 02:57:55,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 847 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:55,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:55,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 02:57:55,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:55,393 INFO L124 PetriNetUnfolderBase]: 1612/2607 cut-off events. [2024-06-28 02:57:55,393 INFO L125 PetriNetUnfolderBase]: For 48359/48359 co-relation queries the response was YES. [2024-06-28 02:57:55,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13562 conditions, 2607 events. 1612/2607 cut-off events. For 48359/48359 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13713 event pairs, 545 based on Foata normal form. 2/2606 useless extension candidates. Maximal degree in co-relation 13522. Up to 2358 conditions per place. [2024-06-28 02:57:55,407 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 88 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2024-06-28 02:57:55,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 113 transitions, 1095 flow [2024-06-28 02:57:55,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:57:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:57:55,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-28 02:57:55,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-28 02:57:55,409 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 847 flow. Second operand 6 states and 118 transitions. [2024-06-28 02:57:55,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 113 transitions, 1095 flow [2024-06-28 02:57:55,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 113 transitions, 962 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 02:57:55,445 INFO L231 Difference]: Finished difference. Result has 93 places, 103 transitions, 774 flow [2024-06-28 02:57:55,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=774, PETRI_PLACES=93, PETRI_TRANSITIONS=103} [2024-06-28 02:57:55,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-28 02:57:55,446 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 103 transitions, 774 flow [2024-06-28 02:57:55,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:55,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:55,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:55,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:57:55,447 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:55,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1021438675, now seen corresponding path program 1 times [2024-06-28 02:57:55,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:55,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321593564] [2024-06-28 02:57:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:55,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:56,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:56,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321593564] [2024-06-28 02:57:56,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321593564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:56,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:56,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:56,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069724760] [2024-06-28 02:57:56,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:56,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:56,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:56,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:56,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:56,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:57:56,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 103 transitions, 774 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:56,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:56,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:57:56,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:56,770 INFO L124 PetriNetUnfolderBase]: 1859/2879 cut-off events. [2024-06-28 02:57:56,770 INFO L125 PetriNetUnfolderBase]: For 60730/60733 co-relation queries the response was YES. [2024-06-28 02:57:56,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15574 conditions, 2879 events. 1859/2879 cut-off events. For 60730/60733 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14760 event pairs, 444 based on Foata normal form. 6/2881 useless extension candidates. Maximal degree in co-relation 15533. Up to 2550 conditions per place. [2024-06-28 02:57:56,786 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-28 02:57:56,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 133 transitions, 1206 flow [2024-06-28 02:57:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:57:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:57:56,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 02:57:56,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-28 02:57:56,788 INFO L175 Difference]: Start difference. First operand has 93 places, 103 transitions, 774 flow. Second operand 7 states and 146 transitions. [2024-06-28 02:57:56,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 133 transitions, 1206 flow [2024-06-28 02:57:56,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 1168 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 02:57:56,817 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 841 flow [2024-06-28 02:57:56,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=841, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2024-06-28 02:57:56,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-28 02:57:56,817 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 841 flow [2024-06-28 02:57:56,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:56,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:56,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:56,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:57:56,818 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:56,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:56,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1024117075, now seen corresponding path program 2 times [2024-06-28 02:57:56,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:56,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928440802] [2024-06-28 02:57:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:56,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:57,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:57,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928440802] [2024-06-28 02:57:57,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928440802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:57,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:57,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:57,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064347298] [2024-06-28 02:57:57,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:57,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:57,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:57,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:57,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:57:57,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:57,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:57,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:57:57,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:58,176 INFO L124 PetriNetUnfolderBase]: 1851/2867 cut-off events. [2024-06-28 02:57:58,176 INFO L125 PetriNetUnfolderBase]: For 65529/65532 co-relation queries the response was YES. [2024-06-28 02:57:58,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15876 conditions, 2867 events. 1851/2867 cut-off events. For 65529/65532 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14713 event pairs, 603 based on Foata normal form. 6/2869 useless extension candidates. Maximal degree in co-relation 15834. Up to 2615 conditions per place. [2024-06-28 02:57:58,194 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 96 selfloop transitions, 21 changer transitions 0/130 dead transitions. [2024-06-28 02:57:58,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1133 flow [2024-06-28 02:57:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:57:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:57:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 02:57:58,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-28 02:57:58,195 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 841 flow. Second operand 7 states and 144 transitions. [2024-06-28 02:57:58,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1133 flow [2024-06-28 02:57:58,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 1078 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 02:57:58,246 INFO L231 Difference]: Finished difference. Result has 100 places, 107 transitions, 835 flow [2024-06-28 02:57:58,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=835, PETRI_PLACES=100, PETRI_TRANSITIONS=107} [2024-06-28 02:57:58,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-28 02:57:58,247 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 107 transitions, 835 flow [2024-06-28 02:57:58,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:58,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:58,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:58,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:57:58,247 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:58,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:58,248 INFO L85 PathProgramCache]: Analyzing trace with hash -906024435, now seen corresponding path program 1 times [2024-06-28 02:57:58,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:58,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881764567] [2024-06-28 02:57:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:58,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:59,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:59,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881764567] [2024-06-28 02:57:59,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881764567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:59,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:59,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:57:59,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112762440] [2024-06-28 02:57:59,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:59,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:57:59,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:57:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:57:59,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:57:59,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 107 transitions, 835 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:57:59,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:59,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:57:59,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:59,815 INFO L124 PetriNetUnfolderBase]: 1976/3011 cut-off events. [2024-06-28 02:57:59,815 INFO L125 PetriNetUnfolderBase]: For 71496/71499 co-relation queries the response was YES. [2024-06-28 02:57:59,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16732 conditions, 3011 events. 1976/3011 cut-off events. For 71496/71499 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15130 event pairs, 591 based on Foata normal form. 4/3011 useless extension candidates. Maximal degree in co-relation 16688. Up to 2569 conditions per place. [2024-06-28 02:57:59,833 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 85 selfloop transitions, 55 changer transitions 0/145 dead transitions. [2024-06-28 02:57:59,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 145 transitions, 1327 flow [2024-06-28 02:57:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:57:59,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:57:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-28 02:57:59,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-06-28 02:57:59,835 INFO L175 Difference]: Start difference. First operand has 100 places, 107 transitions, 835 flow. Second operand 8 states and 170 transitions. [2024-06-28 02:57:59,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 145 transitions, 1327 flow [2024-06-28 02:57:59,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 145 transitions, 1277 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 02:57:59,878 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 941 flow [2024-06-28 02:57:59,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-28 02:57:59,878 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-28 02:57:59,878 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 941 flow [2024-06-28 02:57:59,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:57:59,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:59,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:59,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:57:59,879 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:59,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:59,879 INFO L85 PathProgramCache]: Analyzing trace with hash -905851455, now seen corresponding path program 2 times [2024-06-28 02:57:59,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:59,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661837018] [2024-06-28 02:57:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:59,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:00,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:00,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661837018] [2024-06-28 02:58:00,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661837018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:00,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:00,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:00,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784526910] [2024-06-28 02:58:00,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:00,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:00,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:00,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:00,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 941 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:00,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:00,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:00,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:01,470 INFO L124 PetriNetUnfolderBase]: 2030/3109 cut-off events. [2024-06-28 02:58:01,470 INFO L125 PetriNetUnfolderBase]: For 79190/79193 co-relation queries the response was YES. [2024-06-28 02:58:01,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17706 conditions, 3109 events. 2030/3109 cut-off events. For 79190/79193 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15840 event pairs, 589 based on Foata normal form. 4/3109 useless extension candidates. Maximal degree in co-relation 17661. Up to 2615 conditions per place. [2024-06-28 02:58:01,487 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 56 changer transitions 0/151 dead transitions. [2024-06-28 02:58:01,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 151 transitions, 1589 flow [2024-06-28 02:58:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:01,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-28 02:58:01,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-06-28 02:58:01,488 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 941 flow. Second operand 8 states and 170 transitions. [2024-06-28 02:58:01,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 151 transitions, 1589 flow [2024-06-28 02:58:01,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 151 transitions, 1404 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 02:58:01,539 INFO L231 Difference]: Finished difference. Result has 103 places, 116 transitions, 964 flow [2024-06-28 02:58:01,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=964, PETRI_PLACES=103, PETRI_TRANSITIONS=116} [2024-06-28 02:58:01,540 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-28 02:58:01,540 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 116 transitions, 964 flow [2024-06-28 02:58:01,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:01,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:01,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:01,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:58:01,540 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:01,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:01,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1887869379, now seen corresponding path program 3 times [2024-06-28 02:58:01,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:01,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716393548] [2024-06-28 02:58:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:01,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:02,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:02,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716393548] [2024-06-28 02:58:02,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716393548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:02,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:02,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:02,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892539854] [2024-06-28 02:58:02,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:02,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:02,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:02,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:02,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:02,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:02,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 964 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:02,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:02,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:02,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:03,116 INFO L124 PetriNetUnfolderBase]: 2020/3095 cut-off events. [2024-06-28 02:58:03,116 INFO L125 PetriNetUnfolderBase]: For 83122/83125 co-relation queries the response was YES. [2024-06-28 02:58:03,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17678 conditions, 3095 events. 2020/3095 cut-off events. For 83122/83125 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15729 event pairs, 589 based on Foata normal form. 4/3095 useless extension candidates. Maximal degree in co-relation 17633. Up to 2607 conditions per place. [2024-06-28 02:58:03,136 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 86 selfloop transitions, 57 changer transitions 0/148 dead transitions. [2024-06-28 02:58:03,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1424 flow [2024-06-28 02:58:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 02:58:03,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-28 02:58:03,138 INFO L175 Difference]: Start difference. First operand has 103 places, 116 transitions, 964 flow. Second operand 8 states and 166 transitions. [2024-06-28 02:58:03,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1424 flow [2024-06-28 02:58:03,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 1313 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 02:58:03,197 INFO L231 Difference]: Finished difference. Result has 107 places, 116 transitions, 976 flow [2024-06-28 02:58:03,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=976, PETRI_PLACES=107, PETRI_TRANSITIONS=116} [2024-06-28 02:58:03,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-28 02:58:03,197 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 116 transitions, 976 flow [2024-06-28 02:58:03,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:03,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:03,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:03,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:58:03,198 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:03,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:03,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1140374768, now seen corresponding path program 1 times [2024-06-28 02:58:03,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:03,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315876631] [2024-06-28 02:58:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:03,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:03,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:03,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315876631] [2024-06-28 02:58:03,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315876631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:03,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:03,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:58:03,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465400658] [2024-06-28 02:58:03,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:03,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:58:03,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:03,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:58:03,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:58:03,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:03,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 116 transitions, 976 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 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) [2024-06-28 02:58:03,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:03,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:03,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:04,441 INFO L124 PetriNetUnfolderBase]: 1918/2990 cut-off events. [2024-06-28 02:58:04,441 INFO L125 PetriNetUnfolderBase]: For 88328/88328 co-relation queries the response was YES. [2024-06-28 02:58:04,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17510 conditions, 2990 events. 1918/2990 cut-off events. For 88328/88328 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15561 event pairs, 608 based on Foata normal form. 1/2988 useless extension candidates. Maximal degree in co-relation 17464. Up to 2794 conditions per place. [2024-06-28 02:58:04,460 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 110 selfloop transitions, 11 changer transitions 0/134 dead transitions. [2024-06-28 02:58:04,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 134 transitions, 1284 flow [2024-06-28 02:58:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:58:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:58:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-28 02:58:04,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-28 02:58:04,461 INFO L175 Difference]: Start difference. First operand has 107 places, 116 transitions, 976 flow. Second operand 6 states and 118 transitions. [2024-06-28 02:58:04,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 134 transitions, 1284 flow [2024-06-28 02:58:04,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 134 transitions, 1161 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 02:58:04,563 INFO L231 Difference]: Finished difference. Result has 106 places, 119 transitions, 915 flow [2024-06-28 02:58:04,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=106, PETRI_TRANSITIONS=119} [2024-06-28 02:58:04,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-28 02:58:04,564 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 119 transitions, 915 flow [2024-06-28 02:58:04,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 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) [2024-06-28 02:58:04,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:04,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:04,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:58:04,565 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:04,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash 169439595, now seen corresponding path program 4 times [2024-06-28 02:58:04,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:04,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288293036] [2024-06-28 02:58:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:04,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:05,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:05,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288293036] [2024-06-28 02:58:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288293036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:05,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:05,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:05,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832734511] [2024-06-28 02:58:05,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:05,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:05,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:05,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:05,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:05,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:05,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 119 transitions, 915 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:05,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:05,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:05,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:06,086 INFO L124 PetriNetUnfolderBase]: 2047/3144 cut-off events. [2024-06-28 02:58:06,086 INFO L125 PetriNetUnfolderBase]: For 95191/95200 co-relation queries the response was YES. [2024-06-28 02:58:06,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18378 conditions, 3144 events. 2047/3144 cut-off events. For 95191/95200 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16074 event pairs, 618 based on Foata normal form. 7/3142 useless extension candidates. Maximal degree in co-relation 18331. Up to 2633 conditions per place. [2024-06-28 02:58:06,107 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 85 selfloop transitions, 60 changer transitions 0/150 dead transitions. [2024-06-28 02:58:06,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 150 transitions, 1413 flow [2024-06-28 02:58:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 02:58:06,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 02:58:06,108 INFO L175 Difference]: Start difference. First operand has 106 places, 119 transitions, 915 flow. Second operand 8 states and 160 transitions. [2024-06-28 02:58:06,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 150 transitions, 1413 flow [2024-06-28 02:58:06,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 150 transitions, 1373 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 02:58:06,154 INFO L231 Difference]: Finished difference. Result has 110 places, 122 transitions, 1041 flow [2024-06-28 02:58:06,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1041, PETRI_PLACES=110, PETRI_TRANSITIONS=122} [2024-06-28 02:58:06,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-28 02:58:06,159 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 122 transitions, 1041 flow [2024-06-28 02:58:06,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:06,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:06,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:06,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:58:06,160 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:06,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:06,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1317021461, now seen corresponding path program 5 times [2024-06-28 02:58:06,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:06,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763073614] [2024-06-28 02:58:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:06,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:06,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:06,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763073614] [2024-06-28 02:58:06,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763073614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:06,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:06,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:06,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271756788] [2024-06-28 02:58:06,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:06,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:06,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:06,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:06,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:06,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 122 transitions, 1041 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:06,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:06,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:06,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:07,691 INFO L124 PetriNetUnfolderBase]: 2069/3181 cut-off events. [2024-06-28 02:58:07,691 INFO L125 PetriNetUnfolderBase]: For 102750/102759 co-relation queries the response was YES. [2024-06-28 02:58:07,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19089 conditions, 3181 events. 2069/3181 cut-off events. For 102750/102759 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16310 event pairs, 613 based on Foata normal form. 7/3179 useless extension candidates. Maximal degree in co-relation 19041. Up to 2652 conditions per place. [2024-06-28 02:58:07,714 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 59 changer transitions 0/154 dead transitions. [2024-06-28 02:58:07,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 154 transitions, 1559 flow [2024-06-28 02:58:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 02:58:07,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-28 02:58:07,716 INFO L175 Difference]: Start difference. First operand has 110 places, 122 transitions, 1041 flow. Second operand 8 states and 163 transitions. [2024-06-28 02:58:07,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 154 transitions, 1559 flow [2024-06-28 02:58:07,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 154 transitions, 1433 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:07,769 INFO L231 Difference]: Finished difference. Result has 113 places, 125 transitions, 1085 flow [2024-06-28 02:58:07,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1085, PETRI_PLACES=113, PETRI_TRANSITIONS=125} [2024-06-28 02:58:07,770 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-28 02:58:07,770 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 125 transitions, 1085 flow [2024-06-28 02:58:07,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:07,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:07,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:07,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:58:07,771 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:07,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:07,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1317027971, now seen corresponding path program 6 times [2024-06-28 02:58:07,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:07,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942237185] [2024-06-28 02:58:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:07,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:08,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:08,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942237185] [2024-06-28 02:58:08,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942237185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:08,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:08,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:08,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685331228] [2024-06-28 02:58:08,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:08,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:08,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:08,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:08,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:08,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:08,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 125 transitions, 1085 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:08,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:08,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:08,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:09,307 INFO L124 PetriNetUnfolderBase]: 2059/3167 cut-off events. [2024-06-28 02:58:09,307 INFO L125 PetriNetUnfolderBase]: For 108026/108035 co-relation queries the response was YES. [2024-06-28 02:58:09,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19081 conditions, 3167 events. 2059/3167 cut-off events. For 108026/108035 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16169 event pairs, 611 based on Foata normal form. 7/3165 useless extension candidates. Maximal degree in co-relation 19032. Up to 2644 conditions per place. [2024-06-28 02:58:09,329 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 87 selfloop transitions, 60 changer transitions 0/152 dead transitions. [2024-06-28 02:58:09,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 1445 flow [2024-06-28 02:58:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 02:58:09,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 02:58:09,330 INFO L175 Difference]: Start difference. First operand has 113 places, 125 transitions, 1085 flow. Second operand 8 states and 160 transitions. [2024-06-28 02:58:09,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 1445 flow [2024-06-28 02:58:09,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 152 transitions, 1254 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 02:58:09,387 INFO L231 Difference]: Finished difference. Result has 114 places, 125 transitions, 1022 flow [2024-06-28 02:58:09,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1022, PETRI_PLACES=114, PETRI_TRANSITIONS=125} [2024-06-28 02:58:09,388 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-28 02:58:09,388 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 125 transitions, 1022 flow [2024-06-28 02:58:09,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:09,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:09,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:09,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:58:09,389 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:09,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1342382994, now seen corresponding path program 2 times [2024-06-28 02:58:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:09,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621108978] [2024-06-28 02:58:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:09,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:10,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:10,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621108978] [2024-06-28 02:58:10,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621108978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:10,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:10,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:58:10,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890870515] [2024-06-28 02:58:10,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:10,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:58:10,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:10,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:58:10,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:58:10,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:10,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 125 transitions, 1022 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 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) [2024-06-28 02:58:10,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:10,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:10,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:10,617 INFO L124 PetriNetUnfolderBase]: 1945/3049 cut-off events. [2024-06-28 02:58:10,617 INFO L125 PetriNetUnfolderBase]: For 112260/112269 co-relation queries the response was YES. [2024-06-28 02:58:10,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18744 conditions, 3049 events. 1945/3049 cut-off events. For 112260/112269 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15973 event pairs, 618 based on Foata normal form. 7/3051 useless extension candidates. Maximal degree in co-relation 18694. Up to 2830 conditions per place. [2024-06-28 02:58:10,642 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 108 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2024-06-28 02:58:10,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 137 transitions, 1326 flow [2024-06-28 02:58:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:58:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:58:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-28 02:58:10,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 02:58:10,643 INFO L175 Difference]: Start difference. First operand has 114 places, 125 transitions, 1022 flow. Second operand 6 states and 114 transitions. [2024-06-28 02:58:10,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 137 transitions, 1326 flow [2024-06-28 02:58:10,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 137 transitions, 1169 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 02:58:10,720 INFO L231 Difference]: Finished difference. Result has 112 places, 128 transitions, 943 flow [2024-06-28 02:58:10,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=943, PETRI_PLACES=112, PETRI_TRANSITIONS=128} [2024-06-28 02:58:10,720 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-28 02:58:10,720 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 128 transitions, 943 flow [2024-06-28 02:58:10,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 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) [2024-06-28 02:58:10,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:10,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:10,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:58:10,721 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:10,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1146094640, now seen corresponding path program 1 times [2024-06-28 02:58:10,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:10,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519170241] [2024-06-28 02:58:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:10,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:11,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519170241] [2024-06-28 02:58:11,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519170241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:11,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:11,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:58:11,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186136443] [2024-06-28 02:58:11,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:11,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:58:11,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:11,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:58:11,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:58:11,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 02:58:11,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 128 transitions, 943 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:11,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:11,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 02:58:11,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:11,924 INFO L124 PetriNetUnfolderBase]: 1721/2807 cut-off events. [2024-06-28 02:58:11,924 INFO L125 PetriNetUnfolderBase]: For 100285/100285 co-relation queries the response was YES. [2024-06-28 02:58:11,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16854 conditions, 2807 events. 1721/2807 cut-off events. For 100285/100285 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15190 event pairs, 519 based on Foata normal form. 1/2805 useless extension candidates. Maximal degree in co-relation 16803. Up to 2519 conditions per place. [2024-06-28 02:58:11,942 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 118 selfloop transitions, 11 changer transitions 0/143 dead transitions. [2024-06-28 02:58:11,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 143 transitions, 1261 flow [2024-06-28 02:58:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:58:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:58:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-28 02:58:11,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 02:58:11,943 INFO L175 Difference]: Start difference. First operand has 112 places, 128 transitions, 943 flow. Second operand 6 states and 120 transitions. [2024-06-28 02:58:11,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 143 transitions, 1261 flow [2024-06-28 02:58:12,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 143 transitions, 1205 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 02:58:12,031 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 951 flow [2024-06-28 02:58:12,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=951, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-28 02:58:12,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-28 02:58:12,032 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 951 flow [2024-06-28 02:58:12,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:12,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:12,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:12,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:58:12,032 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:12,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:12,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1537710716, now seen corresponding path program 2 times [2024-06-28 02:58:12,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:12,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424077355] [2024-06-28 02:58:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:12,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:12,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:12,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424077355] [2024-06-28 02:58:12,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424077355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:12,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:12,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:58:12,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781376153] [2024-06-28 02:58:12,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:12,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:58:12,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:58:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:58:12,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 02:58:12,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 951 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:12,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:12,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 02:58:12,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:13,168 INFO L124 PetriNetUnfolderBase]: 1718/2804 cut-off events. [2024-06-28 02:58:13,168 INFO L125 PetriNetUnfolderBase]: For 105541/105544 co-relation queries the response was YES. [2024-06-28 02:58:13,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17245 conditions, 2804 events. 1718/2804 cut-off events. For 105541/105544 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15204 event pairs, 523 based on Foata normal form. 3/2803 useless extension candidates. Maximal degree in co-relation 17193. Up to 2509 conditions per place. [2024-06-28 02:58:13,188 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 113 selfloop transitions, 16 changer transitions 0/143 dead transitions. [2024-06-28 02:58:13,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 143 transitions, 1267 flow [2024-06-28 02:58:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:58:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:58:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-28 02:58:13,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-28 02:58:13,189 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 951 flow. Second operand 6 states and 119 transitions. [2024-06-28 02:58:13,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 143 transitions, 1267 flow [2024-06-28 02:58:13,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 143 transitions, 1225 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:58:13,249 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 989 flow [2024-06-28 02:58:13,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=989, PETRI_PLACES=116, PETRI_TRANSITIONS=134} [2024-06-28 02:58:13,250 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-28 02:58:13,250 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 989 flow [2024-06-28 02:58:13,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:13,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:13,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:13,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:58:13,250 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:13,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:13,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1308439421, now seen corresponding path program 1 times [2024-06-28 02:58:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957338569] [2024-06-28 02:58:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:14,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:14,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957338569] [2024-06-28 02:58:14,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957338569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:14,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:14,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:58:14,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979091826] [2024-06-28 02:58:14,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:14,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:58:14,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:58:14,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:58:14,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:14,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 989 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-28 02:58:14,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:14,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:14,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:15,042 INFO L124 PetriNetUnfolderBase]: 1809/2888 cut-off events. [2024-06-28 02:58:15,042 INFO L125 PetriNetUnfolderBase]: For 111060/111060 co-relation queries the response was YES. [2024-06-28 02:58:15,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17902 conditions, 2888 events. 1809/2888 cut-off events. For 111060/111060 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15207 event pairs, 504 based on Foata normal form. 4/2889 useless extension candidates. Maximal degree in co-relation 17849. Up to 2635 conditions per place. [2024-06-28 02:58:15,062 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 142 selfloop transitions, 19 changer transitions 0/167 dead transitions. [2024-06-28 02:58:15,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 167 transitions, 1433 flow [2024-06-28 02:58:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:58:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:58:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 02:58:15,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-28 02:58:15,063 INFO L175 Difference]: Start difference. First operand has 116 places, 134 transitions, 989 flow. Second operand 9 states and 173 transitions. [2024-06-28 02:58:15,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 167 transitions, 1433 flow [2024-06-28 02:58:15,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 167 transitions, 1375 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 02:58:15,136 INFO L231 Difference]: Finished difference. Result has 122 places, 139 transitions, 1038 flow [2024-06-28 02:58:15,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1038, PETRI_PLACES=122, PETRI_TRANSITIONS=139} [2024-06-28 02:58:15,137 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-28 02:58:15,137 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 139 transitions, 1038 flow [2024-06-28 02:58:15,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-28 02:58:15,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:15,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:15,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:58:15,137 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:15,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:15,138 INFO L85 PathProgramCache]: Analyzing trace with hash 543383211, now seen corresponding path program 1 times [2024-06-28 02:58:15,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:15,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861805305] [2024-06-28 02:58:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:15,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:15,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:15,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861805305] [2024-06-28 02:58:15,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861805305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:15,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:15,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:15,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914292956] [2024-06-28 02:58:15,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:15,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:15,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:15,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:15,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:15,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:15,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 139 transitions, 1038 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:15,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:15,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:15,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:16,556 INFO L124 PetriNetUnfolderBase]: 2067/3177 cut-off events. [2024-06-28 02:58:16,557 INFO L125 PetriNetUnfolderBase]: For 139875/139878 co-relation queries the response was YES. [2024-06-28 02:58:16,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20898 conditions, 3177 events. 2067/3177 cut-off events. For 139875/139878 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16158 event pairs, 415 based on Foata normal form. 4/3177 useless extension candidates. Maximal degree in co-relation 20843. Up to 2733 conditions per place. [2024-06-28 02:58:16,578 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 129 selfloop transitions, 40 changer transitions 0/174 dead transitions. [2024-06-28 02:58:16,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 174 transitions, 1632 flow [2024-06-28 02:58:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 02:58:16,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 02:58:16,579 INFO L175 Difference]: Start difference. First operand has 122 places, 139 transitions, 1038 flow. Second operand 8 states and 160 transitions. [2024-06-28 02:58:16,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 174 transitions, 1632 flow [2024-06-28 02:58:16,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 174 transitions, 1565 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 02:58:16,653 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1118 flow [2024-06-28 02:58:16,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1118, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-28 02:58:16,653 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-28 02:58:16,653 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1118 flow [2024-06-28 02:58:16,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:16,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:16,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:16,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:58:16,654 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:16,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1596017719, now seen corresponding path program 2 times [2024-06-28 02:58:16,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:16,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496052594] [2024-06-28 02:58:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:16,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:17,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:17,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496052594] [2024-06-28 02:58:17,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496052594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:17,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:17,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:17,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144070122] [2024-06-28 02:58:17,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:17,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:17,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:17,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:17,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1118 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:17,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:17,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:17,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:18,197 INFO L124 PetriNetUnfolderBase]: 2084/3204 cut-off events. [2024-06-28 02:58:18,197 INFO L125 PetriNetUnfolderBase]: For 148333/148336 co-relation queries the response was YES. [2024-06-28 02:58:18,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21418 conditions, 3204 events. 2084/3204 cut-off events. For 148333/148336 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16354 event pairs, 584 based on Foata normal form. 4/3204 useless extension candidates. Maximal degree in co-relation 21362. Up to 2913 conditions per place. [2024-06-28 02:58:18,219 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 38 changer transitions 0/172 dead transitions. [2024-06-28 02:58:18,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 172 transitions, 1552 flow [2024-06-28 02:58:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:18,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 02:58:18,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-28 02:58:18,220 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1118 flow. Second operand 8 states and 158 transitions. [2024-06-28 02:58:18,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 172 transitions, 1552 flow [2024-06-28 02:58:18,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 172 transitions, 1474 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 02:58:18,304 INFO L231 Difference]: Finished difference. Result has 128 places, 145 transitions, 1159 flow [2024-06-28 02:58:18,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1159, PETRI_PLACES=128, PETRI_TRANSITIONS=145} [2024-06-28 02:58:18,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-28 02:58:18,304 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 145 transitions, 1159 flow [2024-06-28 02:58:18,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:18,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:18,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:18,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:58:18,305 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:18,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:18,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1596165589, now seen corresponding path program 3 times [2024-06-28 02:58:18,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:18,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022587246] [2024-06-28 02:58:18,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:18,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:19,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:19,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022587246] [2024-06-28 02:58:19,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022587246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:19,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:19,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:19,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382067444] [2024-06-28 02:58:19,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:19,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:19,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:19,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:19,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:19,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 145 transitions, 1159 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:19,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:19,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:19,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:19,749 INFO L124 PetriNetUnfolderBase]: 2101/3231 cut-off events. [2024-06-28 02:58:19,749 INFO L125 PetriNetUnfolderBase]: For 156706/156709 co-relation queries the response was YES. [2024-06-28 02:58:19,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21840 conditions, 3231 events. 2101/3231 cut-off events. For 156706/156709 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16478 event pairs, 584 based on Foata normal form. 4/3231 useless extension candidates. Maximal degree in co-relation 21782. Up to 2899 conditions per place. [2024-06-28 02:58:19,772 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 41 changer transitions 0/175 dead transitions. [2024-06-28 02:58:19,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 175 transitions, 1597 flow [2024-06-28 02:58:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 02:58:19,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-28 02:58:19,773 INFO L175 Difference]: Start difference. First operand has 128 places, 145 transitions, 1159 flow. Second operand 8 states and 159 transitions. [2024-06-28 02:58:19,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 175 transitions, 1597 flow [2024-06-28 02:58:19,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 175 transitions, 1508 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 02:58:19,859 INFO L231 Difference]: Finished difference. Result has 130 places, 147 transitions, 1191 flow [2024-06-28 02:58:19,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1191, PETRI_PLACES=130, PETRI_TRANSITIONS=147} [2024-06-28 02:58:19,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-28 02:58:19,860 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 147 transitions, 1191 flow [2024-06-28 02:58:19,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:19,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:19,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:19,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:58:19,860 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:19,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash 991521938, now seen corresponding path program 1 times [2024-06-28 02:58:19,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:19,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474015669] [2024-06-28 02:58:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:19,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:20,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:20,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474015669] [2024-06-28 02:58:20,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474015669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:20,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:20,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:20,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762355963] [2024-06-28 02:58:20,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:20,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:20,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:20,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:20,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 147 transitions, 1191 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:20,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:20,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:20,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:21,222 INFO L124 PetriNetUnfolderBase]: 2001/3137 cut-off events. [2024-06-28 02:58:21,223 INFO L125 PetriNetUnfolderBase]: For 164116/164119 co-relation queries the response was YES. [2024-06-28 02:58:21,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21636 conditions, 3137 events. 2001/3137 cut-off events. For 164116/164119 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16481 event pairs, 579 based on Foata normal form. 4/3137 useless extension candidates. Maximal degree in co-relation 21577. Up to 2824 conditions per place. [2024-06-28 02:58:21,249 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 24 changer transitions 0/173 dead transitions. [2024-06-28 02:58:21,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 173 transitions, 1609 flow [2024-06-28 02:58:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 02:58:21,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-28 02:58:21,251 INFO L175 Difference]: Start difference. First operand has 130 places, 147 transitions, 1191 flow. Second operand 7 states and 144 transitions. [2024-06-28 02:58:21,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 173 transitions, 1609 flow [2024-06-28 02:58:21,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 173 transitions, 1510 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 02:58:21,331 INFO L231 Difference]: Finished difference. Result has 131 places, 151 transitions, 1205 flow [2024-06-28 02:58:21,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1205, PETRI_PLACES=131, PETRI_TRANSITIONS=151} [2024-06-28 02:58:21,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-28 02:58:21,331 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 151 transitions, 1205 flow [2024-06-28 02:58:21,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:21,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:21,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:21,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:58:21,332 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:21,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:21,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1977860681, now seen corresponding path program 4 times [2024-06-28 02:58:21,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:21,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930664997] [2024-06-28 02:58:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:21,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:22,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:22,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930664997] [2024-06-28 02:58:22,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930664997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:22,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:22,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:22,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137408160] [2024-06-28 02:58:22,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:22,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:22,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:22,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:22,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 151 transitions, 1205 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:22,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:22,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:22,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:22,875 INFO L124 PetriNetUnfolderBase]: 2128/3274 cut-off events. [2024-06-28 02:58:22,875 INFO L125 PetriNetUnfolderBase]: For 173748/173751 co-relation queries the response was YES. [2024-06-28 02:58:22,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22822 conditions, 3274 events. 2128/3274 cut-off events. For 173748/173751 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16675 event pairs, 419 based on Foata normal form. 4/3274 useless extension candidates. Maximal degree in co-relation 22762. Up to 2894 conditions per place. [2024-06-28 02:58:22,895 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 136 selfloop transitions, 45 changer transitions 0/186 dead transitions. [2024-06-28 02:58:22,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 186 transitions, 1819 flow [2024-06-28 02:58:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-28 02:58:22,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-28 02:58:22,897 INFO L175 Difference]: Start difference. First operand has 131 places, 151 transitions, 1205 flow. Second operand 8 states and 165 transitions. [2024-06-28 02:58:22,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 186 transitions, 1819 flow [2024-06-28 02:58:22,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 186 transitions, 1734 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:22,993 INFO L231 Difference]: Finished difference. Result has 134 places, 153 transitions, 1249 flow [2024-06-28 02:58:22,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1249, PETRI_PLACES=134, PETRI_TRANSITIONS=153} [2024-06-28 02:58:22,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-28 02:58:22,994 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 153 transitions, 1249 flow [2024-06-28 02:58:22,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:22,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:22,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:22,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:58:22,994 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:22,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:22,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1983370931, now seen corresponding path program 5 times [2024-06-28 02:58:22,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:22,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437121037] [2024-06-28 02:58:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:22,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:23,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:23,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437121037] [2024-06-28 02:58:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437121037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:23,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:23,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678741229] [2024-06-28 02:58:23,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:23,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:23,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 153 transitions, 1249 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:23,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:23,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:23,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:24,573 INFO L124 PetriNetUnfolderBase]: 2145/3301 cut-off events. [2024-06-28 02:58:24,573 INFO L125 PetriNetUnfolderBase]: For 183228/183231 co-relation queries the response was YES. [2024-06-28 02:58:24,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23288 conditions, 3301 events. 2145/3301 cut-off events. For 183228/183231 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16902 event pairs, 588 based on Foata normal form. 4/3301 useless extension candidates. Maximal degree in co-relation 23227. Up to 3008 conditions per place. [2024-06-28 02:58:24,597 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 38 changer transitions 0/182 dead transitions. [2024-06-28 02:58:24,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 182 transitions, 1707 flow [2024-06-28 02:58:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 02:58:24,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-28 02:58:24,599 INFO L175 Difference]: Start difference. First operand has 134 places, 153 transitions, 1249 flow. Second operand 8 states and 157 transitions. [2024-06-28 02:58:24,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 182 transitions, 1707 flow [2024-06-28 02:58:24,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 182 transitions, 1584 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 02:58:24,724 INFO L231 Difference]: Finished difference. Result has 136 places, 155 transitions, 1249 flow [2024-06-28 02:58:24,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1249, PETRI_PLACES=136, PETRI_TRANSITIONS=155} [2024-06-28 02:58:24,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-28 02:58:24,724 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 155 transitions, 1249 flow [2024-06-28 02:58:24,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:24,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:24,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:24,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:58:24,725 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:24,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:24,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1978008551, now seen corresponding path program 6 times [2024-06-28 02:58:24,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:24,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206187823] [2024-06-28 02:58:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:24,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:25,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:25,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206187823] [2024-06-28 02:58:25,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206187823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:25,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:25,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:25,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867644316] [2024-06-28 02:58:25,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:25,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:25,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:25,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:25,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:25,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:25,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 155 transitions, 1249 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:25,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:25,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:25,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:26,324 INFO L124 PetriNetUnfolderBase]: 2162/3328 cut-off events. [2024-06-28 02:58:26,324 INFO L125 PetriNetUnfolderBase]: For 192353/192356 co-relation queries the response was YES. [2024-06-28 02:58:26,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23571 conditions, 3328 events. 2162/3328 cut-off events. For 192353/192356 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17065 event pairs, 588 based on Foata normal form. 4/3328 useless extension candidates. Maximal degree in co-relation 23509. Up to 3035 conditions per place. [2024-06-28 02:58:26,347 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 141 selfloop transitions, 41 changer transitions 0/187 dead transitions. [2024-06-28 02:58:26,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 187 transitions, 1725 flow [2024-06-28 02:58:26,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 02:58:26,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-28 02:58:26,349 INFO L175 Difference]: Start difference. First operand has 136 places, 155 transitions, 1249 flow. Second operand 8 states and 161 transitions. [2024-06-28 02:58:26,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 187 transitions, 1725 flow [2024-06-28 02:58:26,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 187 transitions, 1628 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 02:58:26,463 INFO L231 Difference]: Finished difference. Result has 138 places, 157 transitions, 1281 flow [2024-06-28 02:58:26,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1281, PETRI_PLACES=138, PETRI_TRANSITIONS=157} [2024-06-28 02:58:26,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-28 02:58:26,464 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 157 transitions, 1281 flow [2024-06-28 02:58:26,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:26,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:26,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:26,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:58:26,464 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:26,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:26,465 INFO L85 PathProgramCache]: Analyzing trace with hash 49320038, now seen corresponding path program 1 times [2024-06-28 02:58:26,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:26,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410962951] [2024-06-28 02:58:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:26,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:27,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:27,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410962951] [2024-06-28 02:58:27,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410962951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:27,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:27,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:58:27,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325135087] [2024-06-28 02:58:27,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:27,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:58:27,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:27,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:58:27,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:58:27,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:27,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 157 transitions, 1281 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:27,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:27,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:27,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:28,079 INFO L124 PetriNetUnfolderBase]: 2042/3209 cut-off events. [2024-06-28 02:58:28,079 INFO L125 PetriNetUnfolderBase]: For 199214/199214 co-relation queries the response was YES. [2024-06-28 02:58:28,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23174 conditions, 3209 events. 2042/3209 cut-off events. For 199214/199214 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16874 event pairs, 574 based on Foata normal form. 1/3207 useless extension candidates. Maximal degree in co-relation 23111. Up to 2947 conditions per place. [2024-06-28 02:58:28,108 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 142 selfloop transitions, 14 changer transitions 0/176 dead transitions. [2024-06-28 02:58:28,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 176 transitions, 1669 flow [2024-06-28 02:58:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 02:58:28,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 02:58:28,109 INFO L175 Difference]: Start difference. First operand has 138 places, 157 transitions, 1281 flow. Second operand 7 states and 133 transitions. [2024-06-28 02:58:28,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 176 transitions, 1669 flow [2024-06-28 02:58:28,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 176 transitions, 1562 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 02:58:28,226 INFO L231 Difference]: Finished difference. Result has 139 places, 160 transitions, 1250 flow [2024-06-28 02:58:28,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1250, PETRI_PLACES=139, PETRI_TRANSITIONS=160} [2024-06-28 02:58:28,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-28 02:58:28,227 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 160 transitions, 1250 flow [2024-06-28 02:58:28,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:28,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:28,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:28,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:58:28,228 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:28,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash 49319604, now seen corresponding path program 2 times [2024-06-28 02:58:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:28,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453386306] [2024-06-28 02:58:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:28,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:28,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:28,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453386306] [2024-06-28 02:58:28,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453386306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:28,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:28,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:58:28,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263538240] [2024-06-28 02:58:28,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:28,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:58:28,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:58:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:58:29,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:29,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 160 transitions, 1250 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:29,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:29,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:29,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:29,614 INFO L124 PetriNetUnfolderBase]: 2070/3256 cut-off events. [2024-06-28 02:58:29,614 INFO L125 PetriNetUnfolderBase]: For 209988/209991 co-relation queries the response was YES. [2024-06-28 02:58:29,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23885 conditions, 3256 events. 2070/3256 cut-off events. For 209988/209991 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17247 event pairs, 577 based on Foata normal form. 4/3256 useless extension candidates. Maximal degree in co-relation 23821. Up to 2895 conditions per place. [2024-06-28 02:58:29,639 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 136 selfloop transitions, 29 changer transitions 0/185 dead transitions. [2024-06-28 02:58:29,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 185 transitions, 1820 flow [2024-06-28 02:58:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 02:58:29,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 02:58:29,640 INFO L175 Difference]: Start difference. First operand has 139 places, 160 transitions, 1250 flow. Second operand 7 states and 140 transitions. [2024-06-28 02:58:29,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 185 transitions, 1820 flow [2024-06-28 02:58:29,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 185 transitions, 1766 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:29,779 INFO L231 Difference]: Finished difference. Result has 142 places, 168 transitions, 1400 flow [2024-06-28 02:58:29,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1400, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2024-06-28 02:58:29,779 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-28 02:58:29,779 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1400 flow [2024-06-28 02:58:29,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:29,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:29,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:29,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:58:29,780 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:29,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:29,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2121800823, now seen corresponding path program 7 times [2024-06-28 02:58:29,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:29,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229493897] [2024-06-28 02:58:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:29,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:30,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:30,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229493897] [2024-06-28 02:58:30,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229493897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:30,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:30,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:30,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338044880] [2024-06-28 02:58:30,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:30,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:30,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:30,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:30,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:30,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1400 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:30,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:30,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:30,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:31,418 INFO L124 PetriNetUnfolderBase]: 2187/3369 cut-off events. [2024-06-28 02:58:31,419 INFO L125 PetriNetUnfolderBase]: For 221036/221045 co-relation queries the response was YES. [2024-06-28 02:58:31,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25146 conditions, 3369 events. 2187/3369 cut-off events. For 221036/221045 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17332 event pairs, 612 based on Foata normal form. 7/3367 useless extension candidates. Maximal degree in co-relation 25080. Up to 3069 conditions per place. [2024-06-28 02:58:31,445 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 151 selfloop transitions, 36 changer transitions 0/192 dead transitions. [2024-06-28 02:58:31,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 192 transitions, 1834 flow [2024-06-28 02:58:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 02:58:31,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-28 02:58:31,447 INFO L175 Difference]: Start difference. First operand has 142 places, 168 transitions, 1400 flow. Second operand 8 states and 153 transitions. [2024-06-28 02:58:31,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 192 transitions, 1834 flow [2024-06-28 02:58:31,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 192 transitions, 1731 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-28 02:58:31,607 INFO L231 Difference]: Finished difference. Result has 147 places, 168 transitions, 1376 flow [2024-06-28 02:58:31,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=147, PETRI_TRANSITIONS=168} [2024-06-28 02:58:31,607 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-28 02:58:31,607 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 168 transitions, 1376 flow [2024-06-28 02:58:31,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-28 02:58:31,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:31,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:31,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:58:31,608 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:31,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash 61356098, now seen corresponding path program 2 times [2024-06-28 02:58:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:31,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93052953] [2024-06-28 02:58:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:31,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:32,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:32,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93052953] [2024-06-28 02:58:32,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93052953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:32,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:32,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:58:32,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501413047] [2024-06-28 02:58:32,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:32,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:58:32,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:32,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:58:32,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:58:32,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:32,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 168 transitions, 1376 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:32,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:32,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:32,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:33,135 INFO L124 PetriNetUnfolderBase]: 2067/3252 cut-off events. [2024-06-28 02:58:33,135 INFO L125 PetriNetUnfolderBase]: For 227963/227972 co-relation queries the response was YES. [2024-06-28 02:58:33,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24798 conditions, 3252 events. 2067/3252 cut-off events. For 227963/227972 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17196 event pairs, 580 based on Foata normal form. 7/3254 useless extension candidates. Maximal degree in co-relation 24730. Up to 2969 conditions per place. [2024-06-28 02:58:33,163 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 141 selfloop transitions, 26 changer transitions 0/187 dead transitions. [2024-06-28 02:58:33,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 187 transitions, 1924 flow [2024-06-28 02:58:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 02:58:33,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-28 02:58:33,166 INFO L175 Difference]: Start difference. First operand has 147 places, 168 transitions, 1376 flow. Second operand 7 states and 131 transitions. [2024-06-28 02:58:33,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 187 transitions, 1924 flow [2024-06-28 02:58:33,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 187 transitions, 1830 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 02:58:33,353 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1461 flow [2024-06-28 02:58:33,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1461, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-28 02:58:33,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-28 02:58:33,354 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1461 flow [2024-06-28 02:58:33,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:33,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:33,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:33,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:58:33,354 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:33,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1405187302, now seen corresponding path program 3 times [2024-06-28 02:58:33,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:33,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520828443] [2024-06-28 02:58:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:34,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:34,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520828443] [2024-06-28 02:58:34,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520828443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:34,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:34,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:58:34,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237353626] [2024-06-28 02:58:34,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:34,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:58:34,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:34,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:58:34,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:58:34,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:34,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1461 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:34,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:34,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:34,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:34,938 INFO L124 PetriNetUnfolderBase]: 2064/3248 cut-off events. [2024-06-28 02:58:34,938 INFO L125 PetriNetUnfolderBase]: For 237716/237725 co-relation queries the response was YES. [2024-06-28 02:58:34,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25141 conditions, 3248 events. 2064/3248 cut-off events. For 237716/237725 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17199 event pairs, 580 based on Foata normal form. 7/3250 useless extension candidates. Maximal degree in co-relation 25071. Up to 2975 conditions per place. [2024-06-28 02:58:34,965 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 148 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2024-06-28 02:58:34,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 187 transitions, 1826 flow [2024-06-28 02:58:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 02:58:34,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 02:58:34,966 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1461 flow. Second operand 7 states and 129 transitions. [2024-06-28 02:58:34,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 187 transitions, 1826 flow [2024-06-28 02:58:35,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 187 transitions, 1736 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-28 02:58:35,128 INFO L231 Difference]: Finished difference. Result has 152 places, 177 transitions, 1424 flow [2024-06-28 02:58:35,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1424, PETRI_PLACES=152, PETRI_TRANSITIONS=177} [2024-06-28 02:58:35,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-28 02:58:35,129 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 177 transitions, 1424 flow [2024-06-28 02:58:35,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:35,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:35,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:35,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:58:35,129 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:35,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:35,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1405186868, now seen corresponding path program 3 times [2024-06-28 02:58:35,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:35,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275939642] [2024-06-28 02:58:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:35,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:35,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:35,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275939642] [2024-06-28 02:58:35,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275939642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:35,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:35,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119395458] [2024-06-28 02:58:35,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:35,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:35,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:35,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:36,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:36,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 177 transitions, 1424 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:36,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:36,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:36,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:36,618 INFO L124 PetriNetUnfolderBase]: 2068/3254 cut-off events. [2024-06-28 02:58:36,619 INFO L125 PetriNetUnfolderBase]: For 246824/246833 co-relation queries the response was YES. [2024-06-28 02:58:36,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25337 conditions, 3254 events. 2068/3254 cut-off events. For 246824/246833 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17246 event pairs, 604 based on Foata normal form. 5/3250 useless extension candidates. Maximal degree in co-relation 25265. Up to 2865 conditions per place. [2024-06-28 02:58:36,650 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 42 changer transitions 0/197 dead transitions. [2024-06-28 02:58:36,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 197 transitions, 2124 flow [2024-06-28 02:58:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 02:58:36,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-28 02:58:36,651 INFO L175 Difference]: Start difference. First operand has 152 places, 177 transitions, 1424 flow. Second operand 7 states and 138 transitions. [2024-06-28 02:58:36,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 197 transitions, 2124 flow [2024-06-28 02:58:36,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 197 transitions, 2082 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:36,911 INFO L231 Difference]: Finished difference. Result has 155 places, 185 transitions, 1628 flow [2024-06-28 02:58:36,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1628, PETRI_PLACES=155, PETRI_TRANSITIONS=185} [2024-06-28 02:58:36,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-28 02:58:36,911 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 185 transitions, 1628 flow [2024-06-28 02:58:36,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:36,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:36,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:36,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:58:36,912 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:36,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:36,912 INFO L85 PathProgramCache]: Analyzing trace with hash -957960164, now seen corresponding path program 1 times [2024-06-28 02:58:36,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:36,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586908540] [2024-06-28 02:58:36,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:36,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:37,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:37,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586908540] [2024-06-28 02:58:37,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586908540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:37,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:37,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:58:37,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611314144] [2024-06-28 02:58:37,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:37,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:58:37,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:58:37,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:58:37,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:37,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 185 transitions, 1628 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:37,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:37,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:37,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:38,247 INFO L124 PetriNetUnfolderBase]: 2059/3246 cut-off events. [2024-06-28 02:58:38,247 INFO L125 PetriNetUnfolderBase]: For 259882/259882 co-relation queries the response was YES. [2024-06-28 02:58:38,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26122 conditions, 3246 events. 2059/3246 cut-off events. For 259882/259882 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17055 event pairs, 528 based on Foata normal form. 1/3244 useless extension candidates. Maximal degree in co-relation 26048. Up to 2993 conditions per place. [2024-06-28 02:58:38,278 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 180 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2024-06-28 02:58:38,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 204 transitions, 2102 flow [2024-06-28 02:58:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 02:58:38,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 02:58:38,279 INFO L175 Difference]: Start difference. First operand has 155 places, 185 transitions, 1628 flow. Second operand 7 states and 133 transitions. [2024-06-28 02:58:38,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 204 transitions, 2102 flow [2024-06-28 02:58:38,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 204 transitions, 1954 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-28 02:58:38,576 INFO L231 Difference]: Finished difference. Result has 158 places, 188 transitions, 1566 flow [2024-06-28 02:58:38,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1566, PETRI_PLACES=158, PETRI_TRANSITIONS=188} [2024-06-28 02:58:38,576 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-28 02:58:38,577 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 188 transitions, 1566 flow [2024-06-28 02:58:38,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:38,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:38,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:38,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:58:38,577 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:38,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:38,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1169196454, now seen corresponding path program 1 times [2024-06-28 02:58:38,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:38,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872698063] [2024-06-28 02:58:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:38,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:39,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:39,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872698063] [2024-06-28 02:58:39,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872698063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:39,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:39,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:58:39,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38954654] [2024-06-28 02:58:39,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:39,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:58:39,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:39,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:58:39,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:58:39,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 02:58:39,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 188 transitions, 1566 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:39,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:39,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 02:58:39,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:40,073 INFO L124 PetriNetUnfolderBase]: 1964/3157 cut-off events. [2024-06-28 02:58:40,074 INFO L125 PetriNetUnfolderBase]: For 270853/270853 co-relation queries the response was YES. [2024-06-28 02:58:40,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25670 conditions, 3157 events. 1964/3157 cut-off events. For 270853/270853 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17060 event pairs, 522 based on Foata normal form. 3/3157 useless extension candidates. Maximal degree in co-relation 25595. Up to 2773 conditions per place. [2024-06-28 02:58:40,102 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 165 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-06-28 02:58:40,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 205 transitions, 2000 flow [2024-06-28 02:58:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 02:58:40,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-28 02:58:40,104 INFO L175 Difference]: Start difference. First operand has 158 places, 188 transitions, 1566 flow. Second operand 7 states and 137 transitions. [2024-06-28 02:58:40,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 205 transitions, 2000 flow [2024-06-28 02:58:40,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 205 transitions, 1938 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:40,290 INFO L231 Difference]: Finished difference. Result has 160 places, 191 transitions, 1586 flow [2024-06-28 02:58:40,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1586, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2024-06-28 02:58:40,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-28 02:58:40,290 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 1586 flow [2024-06-28 02:58:40,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:40,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:40,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:40,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:58:40,291 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:40,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:40,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1169196206, now seen corresponding path program 2 times [2024-06-28 02:58:40,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:40,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012358012] [2024-06-28 02:58:40,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:40,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:41,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:41,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012358012] [2024-06-28 02:58:41,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012358012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:41,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:41,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:41,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356848379] [2024-06-28 02:58:41,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:41,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:41,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:41,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:41,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:41,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:41,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 1586 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:41,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:41,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:41,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:41,698 INFO L124 PetriNetUnfolderBase]: 2074/3269 cut-off events. [2024-06-28 02:58:41,698 INFO L125 PetriNetUnfolderBase]: For 278581/278581 co-relation queries the response was YES. [2024-06-28 02:58:41,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26753 conditions, 3269 events. 2074/3269 cut-off events. For 278581/278581 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17173 event pairs, 527 based on Foata normal form. 1/3267 useless extension candidates. Maximal degree in co-relation 26677. Up to 3008 conditions per place. [2024-06-28 02:58:41,727 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 178 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2024-06-28 02:58:41,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 207 transitions, 2064 flow [2024-06-28 02:58:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 02:58:41,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-28 02:58:41,728 INFO L175 Difference]: Start difference. First operand has 160 places, 191 transitions, 1586 flow. Second operand 7 states and 132 transitions. [2024-06-28 02:58:41,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 207 transitions, 2064 flow [2024-06-28 02:58:41,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 207 transitions, 2004 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:41,991 INFO L231 Difference]: Finished difference. Result has 162 places, 194 transitions, 1628 flow [2024-06-28 02:58:41,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1628, PETRI_PLACES=162, PETRI_TRANSITIONS=194} [2024-06-28 02:58:41,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-28 02:58:41,991 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 194 transitions, 1628 flow [2024-06-28 02:58:41,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:41,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:41,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:41,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:58:41,992 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:41,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1405371814, now seen corresponding path program 2 times [2024-06-28 02:58:41,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:41,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250979692] [2024-06-28 02:58:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:41,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:42,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:42,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250979692] [2024-06-28 02:58:42,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250979692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:42,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:42,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:58:42,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785141163] [2024-06-28 02:58:42,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:42,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:58:42,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:58:42,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:58:43,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 02:58:43,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 194 transitions, 1628 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:43,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:43,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 02:58:43,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:43,615 INFO L124 PetriNetUnfolderBase]: 1984/3186 cut-off events. [2024-06-28 02:58:43,615 INFO L125 PetriNetUnfolderBase]: For 291946/291949 co-relation queries the response was YES. [2024-06-28 02:58:43,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26748 conditions, 3186 events. 1984/3186 cut-off events. For 291946/291949 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17199 event pairs, 527 based on Foata normal form. 5/3187 useless extension candidates. Maximal degree in co-relation 26671. Up to 2791 conditions per place. [2024-06-28 02:58:43,644 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 162 selfloop transitions, 19 changer transitions 0/208 dead transitions. [2024-06-28 02:58:43,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 208 transitions, 2066 flow [2024-06-28 02:58:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 02:58:43,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-28 02:58:43,645 INFO L175 Difference]: Start difference. First operand has 162 places, 194 transitions, 1628 flow. Second operand 7 states and 136 transitions. [2024-06-28 02:58:43,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 208 transitions, 2066 flow [2024-06-28 02:58:43,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 208 transitions, 1986 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:43,907 INFO L231 Difference]: Finished difference. Result has 164 places, 197 transitions, 1648 flow [2024-06-28 02:58:43,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1648, PETRI_PLACES=164, PETRI_TRANSITIONS=197} [2024-06-28 02:58:43,907 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-28 02:58:43,907 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 197 transitions, 1648 flow [2024-06-28 02:58:43,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:43,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:43,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:43,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:58:43,908 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:43,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1405371566, now seen corresponding path program 3 times [2024-06-28 02:58:43,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:43,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622194605] [2024-06-28 02:58:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:43,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:44,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622194605] [2024-06-28 02:58:44,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622194605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:44,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:44,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:58:44,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182073154] [2024-06-28 02:58:44,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:44,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:58:44,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:58:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:58:44,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:44,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 197 transitions, 1648 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:44,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:44,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:44,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:45,379 INFO L124 PetriNetUnfolderBase]: 2086/3287 cut-off events. [2024-06-28 02:58:45,379 INFO L125 PetriNetUnfolderBase]: For 298544/298547 co-relation queries the response was YES. [2024-06-28 02:58:45,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27723 conditions, 3287 events. 2086/3287 cut-off events. For 298544/298547 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17271 event pairs, 536 based on Foata normal form. 1/3284 useless extension candidates. Maximal degree in co-relation 27645. Up to 3014 conditions per place. [2024-06-28 02:58:45,411 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 173 selfloop transitions, 28 changer transitions 0/211 dead transitions. [2024-06-28 02:58:45,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 2143 flow [2024-06-28 02:58:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 02:58:45,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-28 02:58:45,412 INFO L175 Difference]: Start difference. First operand has 164 places, 197 transitions, 1648 flow. Second operand 8 states and 143 transitions. [2024-06-28 02:58:45,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 2143 flow [2024-06-28 02:58:45,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 211 transitions, 2063 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:45,669 INFO L231 Difference]: Finished difference. Result has 168 places, 202 transitions, 1712 flow [2024-06-28 02:58:45,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1712, PETRI_PLACES=168, PETRI_TRANSITIONS=202} [2024-06-28 02:58:45,670 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-28 02:58:45,670 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 202 transitions, 1712 flow [2024-06-28 02:58:45,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:45,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:45,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:45,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:58:45,670 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:45,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:45,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1405668484, now seen corresponding path program 3 times [2024-06-28 02:58:45,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:45,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648416964] [2024-06-28 02:58:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:45,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:46,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:46,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648416964] [2024-06-28 02:58:46,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648416964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:46,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:46,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:58:46,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979251512] [2024-06-28 02:58:46,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:46,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:58:46,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:46,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:58:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:58:46,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 02:58:46,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 202 transitions, 1712 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:46,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:46,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 02:58:46,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:47,320 INFO L124 PetriNetUnfolderBase]: 1972/3170 cut-off events. [2024-06-28 02:58:47,320 INFO L125 PetriNetUnfolderBase]: For 307213/307216 co-relation queries the response was YES. [2024-06-28 02:58:47,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27248 conditions, 3170 events. 1972/3170 cut-off events. For 307213/307216 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17143 event pairs, 524 based on Foata normal form. 5/3171 useless extension candidates. Maximal degree in co-relation 27168. Up to 2754 conditions per place. [2024-06-28 02:58:47,350 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 158 selfloop transitions, 30 changer transitions 0/216 dead transitions. [2024-06-28 02:58:47,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 216 transitions, 2172 flow [2024-06-28 02:58:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 02:58:47,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-28 02:58:47,351 INFO L175 Difference]: Start difference. First operand has 168 places, 202 transitions, 1712 flow. Second operand 7 states and 138 transitions. [2024-06-28 02:58:47,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 216 transitions, 2172 flow [2024-06-28 02:58:47,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 216 transitions, 2077 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 02:58:47,607 INFO L231 Difference]: Finished difference. Result has 171 places, 205 transitions, 1748 flow [2024-06-28 02:58:47,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1748, PETRI_PLACES=171, PETRI_TRANSITIONS=205} [2024-06-28 02:58:47,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-28 02:58:47,608 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 205 transitions, 1748 flow [2024-06-28 02:58:47,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:47,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:47,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:47,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:58:47,608 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:47,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:47,608 INFO L85 PathProgramCache]: Analyzing trace with hash -334988758, now seen corresponding path program 1 times [2024-06-28 02:58:47,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:47,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837098786] [2024-06-28 02:58:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:47,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:48,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:48,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837098786] [2024-06-28 02:58:48,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837098786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:48,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:48,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:58:48,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703220057] [2024-06-28 02:58:48,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:48,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:58:48,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:48,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:58:48,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:58:48,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:48,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 205 transitions, 1748 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:48,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:48,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:48,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:49,297 INFO L124 PetriNetUnfolderBase]: 2365/3669 cut-off events. [2024-06-28 02:58:49,297 INFO L125 PetriNetUnfolderBase]: For 352353/352356 co-relation queries the response was YES. [2024-06-28 02:58:49,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31068 conditions, 3669 events. 2365/3669 cut-off events. For 352353/352356 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 19262 event pairs, 383 based on Foata normal form. 16/3681 useless extension candidates. Maximal degree in co-relation 30986. Up to 2439 conditions per place. [2024-06-28 02:58:49,330 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 174 selfloop transitions, 72 changer transitions 0/251 dead transitions. [2024-06-28 02:58:49,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 251 transitions, 2614 flow [2024-06-28 02:58:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:58:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:58:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-28 02:58:49,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-28 02:58:49,331 INFO L175 Difference]: Start difference. First operand has 171 places, 205 transitions, 1748 flow. Second operand 9 states and 188 transitions. [2024-06-28 02:58:49,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 251 transitions, 2614 flow [2024-06-28 02:58:49,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 251 transitions, 2507 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:49,630 INFO L231 Difference]: Finished difference. Result has 175 places, 207 transitions, 1841 flow [2024-06-28 02:58:49,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1841, PETRI_PLACES=175, PETRI_TRANSITIONS=207} [2024-06-28 02:58:49,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-28 02:58:49,631 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 207 transitions, 1841 flow [2024-06-28 02:58:49,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:49,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:49,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:49,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:58:49,632 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:49,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash -276776338, now seen corresponding path program 2 times [2024-06-28 02:58:49,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:49,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818588851] [2024-06-28 02:58:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:49,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:50,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:50,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818588851] [2024-06-28 02:58:50,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818588851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:50,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:50,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:58:50,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631392426] [2024-06-28 02:58:50,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:50,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:58:50,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:50,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:58:50,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:58:50,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:50,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 207 transitions, 1841 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:50,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:50,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:50,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:51,565 INFO L124 PetriNetUnfolderBase]: 2457/3831 cut-off events. [2024-06-28 02:58:51,566 INFO L125 PetriNetUnfolderBase]: For 371754/371757 co-relation queries the response was YES. [2024-06-28 02:58:51,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32325 conditions, 3831 events. 2457/3831 cut-off events. For 371754/371757 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 20527 event pairs, 604 based on Foata normal form. 24/3851 useless extension candidates. Maximal degree in co-relation 32242. Up to 3144 conditions per place. [2024-06-28 02:58:51,603 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 174 selfloop transitions, 66 changer transitions 0/245 dead transitions. [2024-06-28 02:58:51,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 245 transitions, 2479 flow [2024-06-28 02:58:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:58:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:58:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-28 02:58:51,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-28 02:58:51,604 INFO L175 Difference]: Start difference. First operand has 175 places, 207 transitions, 1841 flow. Second operand 9 states and 185 transitions. [2024-06-28 02:58:51,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 245 transitions, 2479 flow [2024-06-28 02:58:51,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 245 transitions, 2391 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:51,982 INFO L231 Difference]: Finished difference. Result has 179 places, 209 transitions, 1945 flow [2024-06-28 02:58:51,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1945, PETRI_PLACES=179, PETRI_TRANSITIONS=209} [2024-06-28 02:58:51,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-28 02:58:51,982 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 209 transitions, 1945 flow [2024-06-28 02:58:51,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:51,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:51,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:51,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:58:51,983 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:51,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:51,983 INFO L85 PathProgramCache]: Analyzing trace with hash -628855612, now seen corresponding path program 3 times [2024-06-28 02:58:51,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:51,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840272656] [2024-06-28 02:58:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:51,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:52,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:52,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840272656] [2024-06-28 02:58:52,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840272656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:52,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:52,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:58:52,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774485460] [2024-06-28 02:58:52,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:52,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:58:52,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:52,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:58:52,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:58:52,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:52,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 209 transitions, 1945 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:52,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:52,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:52,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:53,854 INFO L124 PetriNetUnfolderBase]: 2515/3939 cut-off events. [2024-06-28 02:58:53,854 INFO L125 PetriNetUnfolderBase]: For 380151/380154 co-relation queries the response was YES. [2024-06-28 02:58:53,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33410 conditions, 3939 events. 2515/3939 cut-off events. For 380151/380154 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21377 event pairs, 604 based on Foata normal form. 16/3951 useless extension candidates. Maximal degree in co-relation 33325. Up to 3132 conditions per place. [2024-06-28 02:58:53,890 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 177 selfloop transitions, 68 changer transitions 0/250 dead transitions. [2024-06-28 02:58:53,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 250 transitions, 2587 flow [2024-06-28 02:58:53,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:58:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:58:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-28 02:58:53,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-28 02:58:53,891 INFO L175 Difference]: Start difference. First operand has 179 places, 209 transitions, 1945 flow. Second operand 9 states and 188 transitions. [2024-06-28 02:58:53,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 250 transitions, 2587 flow [2024-06-28 02:58:54,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 250 transitions, 2425 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 02:58:54,234 INFO L231 Difference]: Finished difference. Result has 181 places, 210 transitions, 1955 flow [2024-06-28 02:58:54,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1955, PETRI_PLACES=181, PETRI_TRANSITIONS=210} [2024-06-28 02:58:54,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-28 02:58:54,234 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 210 transitions, 1955 flow [2024-06-28 02:58:54,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:54,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:54,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:58:54,235 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:54,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:54,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2058475178, now seen corresponding path program 4 times [2024-06-28 02:58:54,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:54,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146512190] [2024-06-28 02:58:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:54,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:55,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:55,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146512190] [2024-06-28 02:58:55,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146512190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:55,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:55,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:58:55,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991236214] [2024-06-28 02:58:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:58:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:58:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:58:55,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:55,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 210 transitions, 1955 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:55,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:55,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:55,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:56,109 INFO L124 PetriNetUnfolderBase]: 2573/4047 cut-off events. [2024-06-28 02:58:56,109 INFO L125 PetriNetUnfolderBase]: For 394229/394232 co-relation queries the response was YES. [2024-06-28 02:58:56,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33951 conditions, 4047 events. 2573/4047 cut-off events. For 394229/394232 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 22274 event pairs, 619 based on Foata normal form. 16/4059 useless extension candidates. Maximal degree in co-relation 33865. Up to 3097 conditions per place. [2024-06-28 02:58:56,146 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 176 selfloop transitions, 71 changer transitions 0/252 dead transitions. [2024-06-28 02:58:56,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 252 transitions, 2605 flow [2024-06-28 02:58:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:58:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:58:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-28 02:58:56,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-28 02:58:56,148 INFO L175 Difference]: Start difference. First operand has 181 places, 210 transitions, 1955 flow. Second operand 9 states and 189 transitions. [2024-06-28 02:58:56,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 252 transitions, 2605 flow [2024-06-28 02:58:56,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 252 transitions, 2451 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 02:58:56,496 INFO L231 Difference]: Finished difference. Result has 183 places, 211 transitions, 1981 flow [2024-06-28 02:58:56,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1981, PETRI_PLACES=183, PETRI_TRANSITIONS=211} [2024-06-28 02:58:56,497 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-28 02:58:56,497 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 211 transitions, 1981 flow [2024-06-28 02:58:56,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:56,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:56,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:56,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:58:56,498 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:56,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:56,498 INFO L85 PathProgramCache]: Analyzing trace with hash 672409988, now seen corresponding path program 1 times [2024-06-28 02:58:56,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:56,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029921482] [2024-06-28 02:58:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:56,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:57,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029921482] [2024-06-28 02:58:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029921482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:57,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:57,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:58:57,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155831658] [2024-06-28 02:58:57,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:57,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:58:57,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:58:57,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:58:57,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:58:57,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 211 transitions, 1981 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:57,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:57,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:58:57,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:58,268 INFO L124 PetriNetUnfolderBase]: 2434/3904 cut-off events. [2024-06-28 02:58:58,269 INFO L125 PetriNetUnfolderBase]: For 390592/390595 co-relation queries the response was YES. [2024-06-28 02:58:58,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33399 conditions, 3904 events. 2434/3904 cut-off events. For 390592/390595 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22104 event pairs, 666 based on Foata normal form. 4/3892 useless extension candidates. Maximal degree in co-relation 33312. Up to 3516 conditions per place. [2024-06-28 02:58:58,303 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 185 selfloop transitions, 29 changer transitions 0/237 dead transitions. [2024-06-28 02:58:58,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 237 transitions, 2537 flow [2024-06-28 02:58:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 02:58:58,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 02:58:58,304 INFO L175 Difference]: Start difference. First operand has 183 places, 211 transitions, 1981 flow. Second operand 8 states and 160 transitions. [2024-06-28 02:58:58,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 237 transitions, 2537 flow [2024-06-28 02:58:58,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 237 transitions, 2375 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 02:58:58,715 INFO L231 Difference]: Finished difference. Result has 184 places, 215 transitions, 1960 flow [2024-06-28 02:58:58,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1960, PETRI_PLACES=184, PETRI_TRANSITIONS=215} [2024-06-28 02:58:58,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-28 02:58:58,716 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 215 transitions, 1960 flow [2024-06-28 02:58:58,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:58,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:58,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:58,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:58:58,717 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:58,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1536214476, now seen corresponding path program 5 times [2024-06-28 02:58:58,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:58,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759615653] [2024-06-28 02:58:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:58,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:59,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:59,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759615653] [2024-06-28 02:58:59,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759615653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:59,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:59,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:58:59,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214728456] [2024-06-28 02:58:59,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:59,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:58:59,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:58:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:58:59,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:58:59,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 215 transitions, 1960 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:59,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:59,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:58:59,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:00,630 INFO L124 PetriNetUnfolderBase]: 2702/4284 cut-off events. [2024-06-28 02:59:00,630 INFO L125 PetriNetUnfolderBase]: For 435341/435344 co-relation queries the response was YES. [2024-06-28 02:59:00,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36061 conditions, 4284 events. 2702/4284 cut-off events. For 435341/435344 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 24121 event pairs, 510 based on Foata normal form. 16/4296 useless extension candidates. Maximal degree in co-relation 35973. Up to 3205 conditions per place. [2024-06-28 02:59:00,677 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 180 selfloop transitions, 78 changer transitions 0/263 dead transitions. [2024-06-28 02:59:00,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 263 transitions, 2876 flow [2024-06-28 02:59:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-28 02:59:00,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2024-06-28 02:59:00,678 INFO L175 Difference]: Start difference. First operand has 184 places, 215 transitions, 1960 flow. Second operand 9 states and 194 transitions. [2024-06-28 02:59:00,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 263 transitions, 2876 flow [2024-06-28 02:59:01,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 263 transitions, 2763 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 02:59:01,109 INFO L231 Difference]: Finished difference. Result has 187 places, 217 transitions, 2075 flow [2024-06-28 02:59:01,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2075, PETRI_PLACES=187, PETRI_TRANSITIONS=217} [2024-06-28 02:59:01,110 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-28 02:59:01,110 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 217 transitions, 2075 flow [2024-06-28 02:59:01,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:01,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:01,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:01,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:59:01,110 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:01,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1692980172, now seen corresponding path program 6 times [2024-06-28 02:59:01,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:01,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399821215] [2024-06-28 02:59:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:01,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:01,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399821215] [2024-06-28 02:59:01,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399821215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:01,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:01,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:59:01,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737131140] [2024-06-28 02:59:01,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:01,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:59:01,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:01,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:59:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:59:02,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:59:02,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 217 transitions, 2075 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:02,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:02,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:59:02,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:03,156 INFO L124 PetriNetUnfolderBase]: 2871/4563 cut-off events. [2024-06-28 02:59:03,156 INFO L125 PetriNetUnfolderBase]: For 481299/481302 co-relation queries the response was YES. [2024-06-28 02:59:03,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39095 conditions, 4563 events. 2871/4563 cut-off events. For 481299/481302 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26202 event pairs, 705 based on Foata normal form. 16/4575 useless extension candidates. Maximal degree in co-relation 39006. Up to 3696 conditions per place. [2024-06-28 02:59:03,202 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 187 selfloop transitions, 73 changer transitions 0/265 dead transitions. [2024-06-28 02:59:03,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 265 transitions, 3005 flow [2024-06-28 02:59:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-28 02:59:03,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2024-06-28 02:59:03,203 INFO L175 Difference]: Start difference. First operand has 187 places, 217 transitions, 2075 flow. Second operand 9 states and 194 transitions. [2024-06-28 02:59:03,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 265 transitions, 3005 flow [2024-06-28 02:59:03,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 265 transitions, 2892 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 02:59:03,640 INFO L231 Difference]: Finished difference. Result has 191 places, 219 transitions, 2184 flow [2024-06-28 02:59:03,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2184, PETRI_PLACES=191, PETRI_TRANSITIONS=219} [2024-06-28 02:59:03,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-28 02:59:03,641 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 219 transitions, 2184 flow [2024-06-28 02:59:03,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:03,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:03,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:03,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:59:03,641 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:03,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:03,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1760040596, now seen corresponding path program 7 times [2024-06-28 02:59:03,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:03,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120734402] [2024-06-28 02:59:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:04,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:04,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120734402] [2024-06-28 02:59:04,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120734402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:04,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:04,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:59:04,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027964371] [2024-06-28 02:59:04,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:04,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:59:04,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:04,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:59:04,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:59:04,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:59:04,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 219 transitions, 2184 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:04,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:04,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:59:04,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:05,737 INFO L124 PetriNetUnfolderBase]: 2946/4688 cut-off events. [2024-06-28 02:59:05,738 INFO L125 PetriNetUnfolderBase]: For 504243/504246 co-relation queries the response was YES. [2024-06-28 02:59:05,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40226 conditions, 4688 events. 2946/4688 cut-off events. For 504243/504246 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 27202 event pairs, 740 based on Foata normal form. 20/4704 useless extension candidates. Maximal degree in co-relation 40135. Up to 3977 conditions per place. [2024-06-28 02:59:05,781 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 187 selfloop transitions, 66 changer transitions 0/258 dead transitions. [2024-06-28 02:59:05,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 258 transitions, 2846 flow [2024-06-28 02:59:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-28 02:59:05,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-28 02:59:05,782 INFO L175 Difference]: Start difference. First operand has 191 places, 219 transitions, 2184 flow. Second operand 9 states and 186 transitions. [2024-06-28 02:59:05,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 258 transitions, 2846 flow [2024-06-28 02:59:06,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 258 transitions, 2732 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 02:59:06,316 INFO L231 Difference]: Finished difference. Result has 195 places, 220 transitions, 2247 flow [2024-06-28 02:59:06,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2247, PETRI_PLACES=195, PETRI_TRANSITIONS=220} [2024-06-28 02:59:06,317 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-28 02:59:06,317 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 220 transitions, 2247 flow [2024-06-28 02:59:06,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:06,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:06,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:06,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:59:06,317 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:06,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:06,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1766296706, now seen corresponding path program 8 times [2024-06-28 02:59:06,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:06,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244908388] [2024-06-28 02:59:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:06,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:07,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:07,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244908388] [2024-06-28 02:59:07,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244908388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:07,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:07,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:59:07,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573085286] [2024-06-28 02:59:07,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:07,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:59:07,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:07,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:59:07,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:59:07,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:59:07,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 220 transitions, 2247 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:07,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:07,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:59:07,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:08,456 INFO L124 PetriNetUnfolderBase]: 3021/4823 cut-off events. [2024-06-28 02:59:08,457 INFO L125 PetriNetUnfolderBase]: For 522100/522103 co-relation queries the response was YES. [2024-06-28 02:59:08,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41298 conditions, 4823 events. 3021/4823 cut-off events. For 522100/522103 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28317 event pairs, 764 based on Foata normal form. 20/4839 useless extension candidates. Maximal degree in co-relation 41205. Up to 4102 conditions per place. [2024-06-28 02:59:08,504 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 186 selfloop transitions, 67 changer transitions 0/258 dead transitions. [2024-06-28 02:59:08,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 258 transitions, 2907 flow [2024-06-28 02:59:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-28 02:59:08,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-28 02:59:08,505 INFO L175 Difference]: Start difference. First operand has 195 places, 220 transitions, 2247 flow. Second operand 9 states and 184 transitions. [2024-06-28 02:59:08,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 258 transitions, 2907 flow [2024-06-28 02:59:09,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 258 transitions, 2756 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 02:59:09,044 INFO L231 Difference]: Finished difference. Result has 197 places, 221 transitions, 2277 flow [2024-06-28 02:59:09,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2277, PETRI_PLACES=197, PETRI_TRANSITIONS=221} [2024-06-28 02:59:09,044 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-28 02:59:09,044 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 221 transitions, 2277 flow [2024-06-28 02:59:09,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:09,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:09,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:09,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:59:09,045 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:09,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:09,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1593806816, now seen corresponding path program 9 times [2024-06-28 02:59:09,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:09,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681051590] [2024-06-28 02:59:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:09,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:09,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:09,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681051590] [2024-06-28 02:59:09,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681051590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:09,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:09,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:59:09,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12781054] [2024-06-28 02:59:09,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:09,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:59:09,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:09,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:59:09,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:59:09,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:59:09,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 221 transitions, 2277 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:09,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:09,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:59:09,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:11,089 INFO L124 PetriNetUnfolderBase]: 2985/4767 cut-off events. [2024-06-28 02:59:11,089 INFO L125 PetriNetUnfolderBase]: For 508135/508138 co-relation queries the response was YES. [2024-06-28 02:59:11,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40068 conditions, 4767 events. 2985/4767 cut-off events. For 508135/508138 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27959 event pairs, 741 based on Foata normal form. 20/4783 useless extension candidates. Maximal degree in co-relation 39974. Up to 4046 conditions per place. [2024-06-28 02:59:11,140 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 185 selfloop transitions, 71 changer transitions 0/261 dead transitions. [2024-06-28 02:59:11,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 261 transitions, 2915 flow [2024-06-28 02:59:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-28 02:59:11,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-28 02:59:11,141 INFO L175 Difference]: Start difference. First operand has 197 places, 221 transitions, 2277 flow. Second operand 9 states and 188 transitions. [2024-06-28 02:59:11,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 261 transitions, 2915 flow [2024-06-28 02:59:11,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 261 transitions, 2744 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-28 02:59:11,697 INFO L231 Difference]: Finished difference. Result has 199 places, 221 transitions, 2255 flow [2024-06-28 02:59:11,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2106, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2255, PETRI_PLACES=199, PETRI_TRANSITIONS=221} [2024-06-28 02:59:11,698 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-28 02:59:11,698 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 221 transitions, 2255 flow [2024-06-28 02:59:11,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:11,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:11,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:11,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:59:11,699 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:11,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:11,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1859213952, now seen corresponding path program 10 times [2024-06-28 02:59:11,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:11,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054741407] [2024-06-28 02:59:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:11,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:12,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:12,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054741407] [2024-06-28 02:59:12,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054741407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:12,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:12,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:59:12,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633086261] [2024-06-28 02:59:12,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:12,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:59:12,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:12,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:59:12,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:59:12,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:59:12,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 221 transitions, 2255 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:12,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:12,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:59:12,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:13,734 INFO L124 PetriNetUnfolderBase]: 3043/4865 cut-off events. [2024-06-28 02:59:13,734 INFO L125 PetriNetUnfolderBase]: For 516463/516466 co-relation queries the response was YES. [2024-06-28 02:59:13,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40525 conditions, 4865 events. 3043/4865 cut-off events. For 516463/516466 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28654 event pairs, 732 based on Foata normal form. 16/4877 useless extension candidates. Maximal degree in co-relation 40430. Up to 3914 conditions per place. [2024-06-28 02:59:13,781 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 189 selfloop transitions, 69 changer transitions 0/263 dead transitions. [2024-06-28 02:59:13,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 263 transitions, 2941 flow [2024-06-28 02:59:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-28 02:59:13,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-28 02:59:13,782 INFO L175 Difference]: Start difference. First operand has 199 places, 221 transitions, 2255 flow. Second operand 9 states and 188 transitions. [2024-06-28 02:59:13,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 263 transitions, 2941 flow [2024-06-28 02:59:14,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 263 transitions, 2794 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 02:59:14,343 INFO L231 Difference]: Finished difference. Result has 200 places, 222 transitions, 2294 flow [2024-06-28 02:59:14,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2294, PETRI_PLACES=200, PETRI_TRANSITIONS=222} [2024-06-28 02:59:14,345 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-28 02:59:14,345 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 222 transitions, 2294 flow [2024-06-28 02:59:14,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:14,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:14,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:14,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 02:59:14,346 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:14,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:14,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1521293711, now seen corresponding path program 1 times [2024-06-28 02:59:14,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:14,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825536170] [2024-06-28 02:59:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:14,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:15,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:15,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825536170] [2024-06-28 02:59:15,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825536170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:15,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:15,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:59:15,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077251906] [2024-06-28 02:59:15,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:15,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:59:15,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:15,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:59:15,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:59:15,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:59:15,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 222 transitions, 2294 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:15,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:15,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:59:15,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:16,137 INFO L124 PetriNetUnfolderBase]: 2888/4694 cut-off events. [2024-06-28 02:59:16,138 INFO L125 PetriNetUnfolderBase]: For 512167/512170 co-relation queries the response was YES. [2024-06-28 02:59:16,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40024 conditions, 4694 events. 2888/4694 cut-off events. For 512167/512170 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 28374 event pairs, 803 based on Foata normal form. 4/4658 useless extension candidates. Maximal degree in co-relation 39928. Up to 4282 conditions per place. [2024-06-28 02:59:16,188 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 197 selfloop transitions, 24 changer transitions 0/244 dead transitions. [2024-06-28 02:59:16,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 244 transitions, 2839 flow [2024-06-28 02:59:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-28 02:59:16,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-28 02:59:16,189 INFO L175 Difference]: Start difference. First operand has 200 places, 222 transitions, 2294 flow. Second operand 7 states and 141 transitions. [2024-06-28 02:59:16,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 244 transitions, 2839 flow [2024-06-28 02:59:16,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 244 transitions, 2673 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 02:59:16,740 INFO L231 Difference]: Finished difference. Result has 200 places, 226 transitions, 2246 flow [2024-06-28 02:59:16,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2246, PETRI_PLACES=200, PETRI_TRANSITIONS=226} [2024-06-28 02:59:16,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-28 02:59:16,740 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 226 transitions, 2246 flow [2024-06-28 02:59:16,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:16,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:16,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:16,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 02:59:16,741 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:16,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1528912271, now seen corresponding path program 2 times [2024-06-28 02:59:16,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:16,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909228409] [2024-06-28 02:59:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:16,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:17,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:17,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909228409] [2024-06-28 02:59:17,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909228409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:17,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:17,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:59:17,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938195955] [2024-06-28 02:59:17,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:17,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:59:17,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:17,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:59:17,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:59:17,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:59:17,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 226 transitions, 2246 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:17,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:17,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:59:17,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:18,448 INFO L124 PetriNetUnfolderBase]: 2890/4697 cut-off events. [2024-06-28 02:59:18,448 INFO L125 PetriNetUnfolderBase]: For 520704/520707 co-relation queries the response was YES. [2024-06-28 02:59:18,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39725 conditions, 4697 events. 2890/4697 cut-off events. For 520704/520707 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 28393 event pairs, 803 based on Foata normal form. 4/4661 useless extension candidates. Maximal degree in co-relation 39628. Up to 4253 conditions per place. [2024-06-28 02:59:18,497 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 186 selfloop transitions, 36 changer transitions 0/245 dead transitions. [2024-06-28 02:59:18,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 245 transitions, 2916 flow [2024-06-28 02:59:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 02:59:18,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 02:59:18,498 INFO L175 Difference]: Start difference. First operand has 200 places, 226 transitions, 2246 flow. Second operand 7 states and 140 transitions. [2024-06-28 02:59:18,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 245 transitions, 2916 flow [2024-06-28 02:59:19,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 245 transitions, 2839 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 02:59:19,135 INFO L231 Difference]: Finished difference. Result has 202 places, 229 transitions, 2306 flow [2024-06-28 02:59:19,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2306, PETRI_PLACES=202, PETRI_TRANSITIONS=229} [2024-06-28 02:59:19,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-28 02:59:19,136 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 229 transitions, 2306 flow [2024-06-28 02:59:19,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:19,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:19,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:19,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 02:59:19,136 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:19,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:19,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1708348412, now seen corresponding path program 2 times [2024-06-28 02:59:19,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:19,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770723888] [2024-06-28 02:59:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:19,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:20,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:20,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770723888] [2024-06-28 02:59:20,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770723888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:20,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:20,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:59:20,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921755236] [2024-06-28 02:59:20,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:20,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:59:20,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:59:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:59:20,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:59:20,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 229 transitions, 2306 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:20,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:20,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:59:20,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:21,201 INFO L124 PetriNetUnfolderBase]: 2926/4752 cut-off events. [2024-06-28 02:59:21,202 INFO L125 PetriNetUnfolderBase]: For 543102/543105 co-relation queries the response was YES. [2024-06-28 02:59:21,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40561 conditions, 4752 events. 2926/4752 cut-off events. For 543102/543105 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28807 event pairs, 797 based on Foata normal form. 4/4716 useless extension candidates. Maximal degree in co-relation 40463. Up to 4256 conditions per place. [2024-06-28 02:59:21,361 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 188 selfloop transitions, 45 changer transitions 0/256 dead transitions. [2024-06-28 02:59:21,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 256 transitions, 3258 flow [2024-06-28 02:59:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:59:21,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:59:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 02:59:21,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-28 02:59:21,363 INFO L175 Difference]: Start difference. First operand has 202 places, 229 transitions, 2306 flow. Second operand 8 states and 158 transitions. [2024-06-28 02:59:21,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 256 transitions, 3258 flow [2024-06-28 02:59:22,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 256 transitions, 3171 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 02:59:22,270 INFO L231 Difference]: Finished difference. Result has 207 places, 237 transitions, 2489 flow [2024-06-28 02:59:22,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2489, PETRI_PLACES=207, PETRI_TRANSITIONS=237} [2024-06-28 02:59:22,270 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-28 02:59:22,271 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 237 transitions, 2489 flow [2024-06-28 02:59:22,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:22,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:22,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:22,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 02:59:22,271 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:22,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:22,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1528908706, now seen corresponding path program 3 times [2024-06-28 02:59:22,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:22,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073961529] [2024-06-28 02:59:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:22,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:23,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:23,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073961529] [2024-06-28 02:59:23,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073961529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:23,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:23,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:59:23,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211895806] [2024-06-28 02:59:23,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:23,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:59:23,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:59:23,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:59:23,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:59:23,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 237 transitions, 2489 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:23,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:23,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:59:23,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:24,252 INFO L124 PetriNetUnfolderBase]: 2930/4758 cut-off events. [2024-06-28 02:59:24,252 INFO L125 PetriNetUnfolderBase]: For 560183/560186 co-relation queries the response was YES. [2024-06-28 02:59:24,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41431 conditions, 4758 events. 2930/4758 cut-off events. For 560183/560186 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28822 event pairs, 805 based on Foata normal form. 4/4722 useless extension candidates. Maximal degree in co-relation 41331. Up to 4302 conditions per place. [2024-06-28 02:59:24,302 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 194 selfloop transitions, 41 changer transitions 0/258 dead transitions. [2024-06-28 02:59:24,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 258 transitions, 3224 flow [2024-06-28 02:59:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:59:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:59:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 02:59:24,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 02:59:24,303 INFO L175 Difference]: Start difference. First operand has 207 places, 237 transitions, 2489 flow. Second operand 8 states and 156 transitions. [2024-06-28 02:59:24,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 258 transitions, 3224 flow [2024-06-28 02:59:24,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 258 transitions, 3082 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-28 02:59:24,978 INFO L231 Difference]: Finished difference. Result has 211 places, 241 transitions, 2531 flow [2024-06-28 02:59:24,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2531, PETRI_PLACES=211, PETRI_TRANSITIONS=241} [2024-06-28 02:59:24,978 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-28 02:59:24,978 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 241 transitions, 2531 flow [2024-06-28 02:59:24,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:24,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:24,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:24,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 02:59:24,979 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:24,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:24,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1528922191, now seen corresponding path program 1 times [2024-06-28 02:59:24,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:24,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597273344] [2024-06-28 02:59:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:24,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:25,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:25,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597273344] [2024-06-28 02:59:25,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597273344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:25,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:25,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:59:25,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173831565] [2024-06-28 02:59:25,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:25,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:59:25,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:59:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:59:26,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:59:26,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 241 transitions, 2531 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:26,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:26,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:59:26,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:26,892 INFO L124 PetriNetUnfolderBase]: 2940/4771 cut-off events. [2024-06-28 02:59:26,893 INFO L125 PetriNetUnfolderBase]: For 575484/575484 co-relation queries the response was YES. [2024-06-28 02:59:26,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41856 conditions, 4771 events. 2940/4771 cut-off events. For 575484/575484 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28874 event pairs, 802 based on Foata normal form. 2/4734 useless extension candidates. Maximal degree in co-relation 41754. Up to 4414 conditions per place. [2024-06-28 02:59:26,945 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 220 selfloop transitions, 18 changer transitions 0/261 dead transitions. [2024-06-28 02:59:26,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 261 transitions, 3121 flow [2024-06-28 02:59:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:59:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:59:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 02:59:26,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-28 02:59:26,946 INFO L175 Difference]: Start difference. First operand has 211 places, 241 transitions, 2531 flow. Second operand 8 states and 149 transitions. [2024-06-28 02:59:26,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 261 transitions, 3121 flow [2024-06-28 02:59:27,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 261 transitions, 2988 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 02:59:27,640 INFO L231 Difference]: Finished difference. Result has 213 places, 244 transitions, 2516 flow [2024-06-28 02:59:27,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2516, PETRI_PLACES=213, PETRI_TRANSITIONS=244} [2024-06-28 02:59:27,641 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-28 02:59:27,641 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 244 transitions, 2516 flow [2024-06-28 02:59:27,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:27,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:27,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:27,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 02:59:27,641 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:27,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:27,642 INFO L85 PathProgramCache]: Analyzing trace with hash -704823732, now seen corresponding path program 11 times [2024-06-28 02:59:27,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:27,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002081115] [2024-06-28 02:59:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:27,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:28,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:28,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002081115] [2024-06-28 02:59:28,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002081115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:28,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:28,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:59:28,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594810876] [2024-06-28 02:59:28,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:28,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:59:28,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:28,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:59:28,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:59:28,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:59:28,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 244 transitions, 2516 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:28,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:28,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:59:28,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:29,719 INFO L124 PetriNetUnfolderBase]: 3180/5081 cut-off events. [2024-06-28 02:59:29,720 INFO L125 PetriNetUnfolderBase]: For 623982/623985 co-relation queries the response was YES. [2024-06-28 02:59:29,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43899 conditions, 5081 events. 3180/5081 cut-off events. For 623982/623985 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 30193 event pairs, 779 based on Foata normal form. 22/5095 useless extension candidates. Maximal degree in co-relation 43796. Up to 4356 conditions per place. [2024-06-28 02:59:29,772 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 62 changer transitions 0/281 dead transitions. [2024-06-28 02:59:29,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 281 transitions, 3226 flow [2024-06-28 02:59:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-28 02:59:29,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-28 02:59:29,773 INFO L175 Difference]: Start difference. First operand has 213 places, 244 transitions, 2516 flow. Second operand 9 states and 181 transitions. [2024-06-28 02:59:29,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 281 transitions, 3226 flow [2024-06-28 02:59:30,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 281 transitions, 3130 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 02:59:30,452 INFO L231 Difference]: Finished difference. Result has 216 places, 245 transitions, 2595 flow [2024-06-28 02:59:30,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2420, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2595, PETRI_PLACES=216, PETRI_TRANSITIONS=245} [2024-06-28 02:59:30,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-28 02:59:30,452 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 245 transitions, 2595 flow [2024-06-28 02:59:30,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:30,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:30,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:30,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 02:59:30,453 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:30,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:30,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1351494588, now seen corresponding path program 12 times [2024-06-28 02:59:30,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:30,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059114579] [2024-06-28 02:59:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:30,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:31,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:31,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059114579] [2024-06-28 02:59:31,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059114579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:31,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:31,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:59:31,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536474911] [2024-06-28 02:59:31,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:31,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:59:31,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:31,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:59:31,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:59:31,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:59:31,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 245 transitions, 2595 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:31,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:31,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:59:31,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:32,629 INFO L124 PetriNetUnfolderBase]: 3255/5216 cut-off events. [2024-06-28 02:59:32,629 INFO L125 PetriNetUnfolderBase]: For 646810/646813 co-relation queries the response was YES. [2024-06-28 02:59:32,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45161 conditions, 5216 events. 3255/5216 cut-off events. For 646810/646813 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31291 event pairs, 803 based on Foata normal form. 22/5230 useless extension candidates. Maximal degree in co-relation 45057. Up to 4481 conditions per place. [2024-06-28 02:59:32,682 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 63 changer transitions 0/282 dead transitions. [2024-06-28 02:59:32,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 282 transitions, 3309 flow [2024-06-28 02:59:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-28 02:59:32,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 02:59:32,683 INFO L175 Difference]: Start difference. First operand has 216 places, 245 transitions, 2595 flow. Second operand 9 states and 180 transitions. [2024-06-28 02:59:32,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 282 transitions, 3309 flow [2024-06-28 02:59:33,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 282 transitions, 3160 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 02:59:33,429 INFO L231 Difference]: Finished difference. Result has 218 places, 246 transitions, 2625 flow [2024-06-28 02:59:33,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2625, PETRI_PLACES=218, PETRI_TRANSITIONS=246} [2024-06-28 02:59:33,429 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-28 02:59:33,429 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 246 transitions, 2625 flow [2024-06-28 02:59:33,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:33,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:33,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:33,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 02:59:33,430 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:33,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:33,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1351316958, now seen corresponding path program 13 times [2024-06-28 02:59:33,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:33,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304209666] [2024-06-28 02:59:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:33,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:34,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:34,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304209666] [2024-06-28 02:59:34,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304209666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:34,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:34,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:59:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770654651] [2024-06-28 02:59:34,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:34,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:59:34,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:59:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:59:34,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:59:34,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 246 transitions, 2625 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:34,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:34,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:59:34,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:35,572 INFO L124 PetriNetUnfolderBase]: 3313/5314 cut-off events. [2024-06-28 02:59:35,572 INFO L125 PetriNetUnfolderBase]: For 658297/658300 co-relation queries the response was YES. [2024-06-28 02:59:35,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45804 conditions, 5314 events. 3313/5314 cut-off events. For 658297/658300 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 32033 event pairs, 789 based on Foata normal form. 18/5324 useless extension candidates. Maximal degree in co-relation 45699. Up to 4183 conditions per place. [2024-06-28 02:59:35,629 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 216 selfloop transitions, 67 changer transitions 0/288 dead transitions. [2024-06-28 02:59:35,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 288 transitions, 3603 flow [2024-06-28 02:59:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-28 02:59:35,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-28 02:59:35,631 INFO L175 Difference]: Start difference. First operand has 218 places, 246 transitions, 2625 flow. Second operand 9 states and 184 transitions. [2024-06-28 02:59:35,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 288 transitions, 3603 flow [2024-06-28 02:59:36,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 288 transitions, 3450 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 02:59:36,315 INFO L231 Difference]: Finished difference. Result has 220 places, 247 transitions, 2658 flow [2024-06-28 02:59:36,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2658, PETRI_PLACES=220, PETRI_TRANSITIONS=247} [2024-06-28 02:59:36,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-28 02:59:36,316 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 247 transitions, 2658 flow [2024-06-28 02:59:36,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:36,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:36,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:36,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 02:59:36,317 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:36,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:36,317 INFO L85 PathProgramCache]: Analyzing trace with hash 719331916, now seen corresponding path program 14 times [2024-06-28 02:59:36,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:36,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534541271] [2024-06-28 02:59:36,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:36,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:37,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:37,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534541271] [2024-06-28 02:59:37,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534541271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:37,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:37,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:59:37,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812523158] [2024-06-28 02:59:37,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:37,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:59:37,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:59:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:59:37,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:59:37,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 247 transitions, 2658 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:37,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:37,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:59:37,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:38,465 INFO L124 PetriNetUnfolderBase]: 3277/5258 cut-off events. [2024-06-28 02:59:38,466 INFO L125 PetriNetUnfolderBase]: For 642777/642780 co-relation queries the response was YES. [2024-06-28 02:59:38,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44282 conditions, 5258 events. 3277/5258 cut-off events. For 642777/642780 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31639 event pairs, 796 based on Foata normal form. 22/5272 useless extension candidates. Maximal degree in co-relation 44176. Up to 4523 conditions per place. [2024-06-28 02:59:38,525 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 211 selfloop transitions, 66 changer transitions 0/282 dead transitions. [2024-06-28 02:59:38,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 282 transitions, 3324 flow [2024-06-28 02:59:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 02:59:38,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-28 02:59:38,526 INFO L175 Difference]: Start difference. First operand has 220 places, 247 transitions, 2658 flow. Second operand 9 states and 178 transitions. [2024-06-28 02:59:38,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 282 transitions, 3324 flow [2024-06-28 02:59:39,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 282 transitions, 3061 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-28 02:59:39,392 INFO L231 Difference]: Finished difference. Result has 221 places, 247 transitions, 2534 flow [2024-06-28 02:59:39,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2534, PETRI_PLACES=221, PETRI_TRANSITIONS=247} [2024-06-28 02:59:39,393 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-28 02:59:39,393 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 247 transitions, 2534 flow [2024-06-28 02:59:39,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:39,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:39,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:39,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 02:59:39,393 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:39,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash -3517583, now seen corresponding path program 3 times [2024-06-28 02:59:39,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:39,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729531682] [2024-06-28 02:59:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:39,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:40,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:40,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729531682] [2024-06-28 02:59:40,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729531682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:40,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:40,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:59:40,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664812201] [2024-06-28 02:59:40,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:40,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:59:40,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:59:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:59:40,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:59:40,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 247 transitions, 2534 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:40,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:40,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:59:40,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:41,283 INFO L124 PetriNetUnfolderBase]: 3144/5114 cut-off events. [2024-06-28 02:59:41,283 INFO L125 PetriNetUnfolderBase]: For 615086/615086 co-relation queries the response was YES. [2024-06-28 02:59:41,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43154 conditions, 5114 events. 3144/5114 cut-off events. For 615086/615086 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 31349 event pairs, 841 based on Foata normal form. 1/5061 useless extension candidates. Maximal degree in co-relation 43048. Up to 4672 conditions per place. [2024-06-28 02:59:41,334 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 219 selfloop transitions, 39 changer transitions 0/281 dead transitions. [2024-06-28 02:59:41,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 281 transitions, 3340 flow [2024-06-28 02:59:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 02:59:41,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-28 02:59:41,335 INFO L175 Difference]: Start difference. First operand has 221 places, 247 transitions, 2534 flow. Second operand 9 states and 168 transitions. [2024-06-28 02:59:41,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 281 transitions, 3340 flow [2024-06-28 02:59:42,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 281 transitions, 3173 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 02:59:42,137 INFO L231 Difference]: Finished difference. Result has 225 places, 266 transitions, 2736 flow [2024-06-28 02:59:42,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2736, PETRI_PLACES=225, PETRI_TRANSITIONS=266} [2024-06-28 02:59:42,137 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-28 02:59:42,137 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 266 transitions, 2736 flow [2024-06-28 02:59:42,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:42,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:42,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:42,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 02:59:42,137 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:42,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:42,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1884891377, now seen corresponding path program 4 times [2024-06-28 02:59:42,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:42,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393475422] [2024-06-28 02:59:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:42,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:42,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:42,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393475422] [2024-06-28 02:59:42,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393475422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:42,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:42,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:59:42,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532716521] [2024-06-28 02:59:42,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:42,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:59:42,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:42,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:59:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:59:42,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:59:42,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 266 transitions, 2736 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:42,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:42,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:59:42,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:43,904 INFO L124 PetriNetUnfolderBase]: 3137/5102 cut-off events. [2024-06-28 02:59:43,905 INFO L125 PetriNetUnfolderBase]: For 627104/627104 co-relation queries the response was YES. [2024-06-28 02:59:43,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43178 conditions, 5102 events. 3137/5102 cut-off events. For 627104/627104 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31302 event pairs, 841 based on Foata normal form. 1/5048 useless extension candidates. Maximal degree in co-relation 43068. Up to 4657 conditions per place. [2024-06-28 02:59:43,965 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2024-06-28 02:59:43,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 280 transitions, 3292 flow [2024-06-28 02:59:43,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 02:59:43,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-28 02:59:43,966 INFO L175 Difference]: Start difference. First operand has 225 places, 266 transitions, 2736 flow. Second operand 7 states and 138 transitions. [2024-06-28 02:59:43,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 280 transitions, 3292 flow [2024-06-28 02:59:44,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 280 transitions, 3199 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-28 02:59:44,871 INFO L231 Difference]: Finished difference. Result has 230 places, 266 transitions, 2734 flow [2024-06-28 02:59:44,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2643, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2734, PETRI_PLACES=230, PETRI_TRANSITIONS=266} [2024-06-28 02:59:44,871 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-28 02:59:44,871 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 266 transitions, 2734 flow [2024-06-28 02:59:44,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:44,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:44,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:44,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 02:59:44,872 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:44,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash 70174585, now seen corresponding path program 5 times [2024-06-28 02:59:44,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:44,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412377395] [2024-06-28 02:59:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:44,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:45,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:45,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412377395] [2024-06-28 02:59:45,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412377395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:45,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:45,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:59:45,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623346990] [2024-06-28 02:59:45,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:45,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:59:45,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:59:45,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:59:45,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:59:45,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 266 transitions, 2734 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:45,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:45,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:59:45,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:46,663 INFO L124 PetriNetUnfolderBase]: 3142/5109 cut-off events. [2024-06-28 02:59:46,663 INFO L125 PetriNetUnfolderBase]: For 642929/642929 co-relation queries the response was YES. [2024-06-28 02:59:46,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43452 conditions, 5109 events. 3142/5109 cut-off events. For 642929/642929 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31336 event pairs, 841 based on Foata normal form. 1/5055 useless extension candidates. Maximal degree in co-relation 43340. Up to 4646 conditions per place. [2024-06-28 02:59:46,717 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 209 selfloop transitions, 48 changer transitions 0/280 dead transitions. [2024-06-28 02:59:46,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 280 transitions, 3328 flow [2024-06-28 02:59:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 02:59:46,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-28 02:59:46,718 INFO L175 Difference]: Start difference. First operand has 230 places, 266 transitions, 2734 flow. Second operand 7 states and 137 transitions. [2024-06-28 02:59:46,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 280 transitions, 3328 flow [2024-06-28 02:59:47,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 280 transitions, 3187 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 02:59:47,491 INFO L231 Difference]: Finished difference. Result has 230 places, 269 transitions, 2751 flow [2024-06-28 02:59:47,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2751, PETRI_PLACES=230, PETRI_TRANSITIONS=269} [2024-06-28 02:59:47,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-28 02:59:47,492 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 269 transitions, 2751 flow [2024-06-28 02:59:47,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:47,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:47,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:47,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 02:59:47,492 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:47,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:47,492 INFO L85 PathProgramCache]: Analyzing trace with hash 616838415, now seen corresponding path program 6 times [2024-06-28 02:59:47,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:47,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087187394] [2024-06-28 02:59:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:47,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:48,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:48,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087187394] [2024-06-28 02:59:48,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087187394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:48,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:48,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:59:48,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999898430] [2024-06-28 02:59:48,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:48,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:59:48,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:59:48,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:59:48,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:59:48,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 269 transitions, 2751 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:48,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:48,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:59:48,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:49,351 INFO L124 PetriNetUnfolderBase]: 3147/5121 cut-off events. [2024-06-28 02:59:49,351 INFO L125 PetriNetUnfolderBase]: For 643204/643207 co-relation queries the response was YES. [2024-06-28 02:59:49,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43507 conditions, 5121 events. 3147/5121 cut-off events. For 643204/643207 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31450 event pairs, 854 based on Foata normal form. 3/5064 useless extension candidates. Maximal degree in co-relation 43394. Up to 4593 conditions per place. [2024-06-28 02:59:49,405 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 192 selfloop transitions, 67 changer transitions 0/282 dead transitions. [2024-06-28 02:59:49,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 282 transitions, 3501 flow [2024-06-28 02:59:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 02:59:49,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-28 02:59:49,406 INFO L175 Difference]: Start difference. First operand has 230 places, 269 transitions, 2751 flow. Second operand 7 states and 136 transitions. [2024-06-28 02:59:49,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 282 transitions, 3501 flow [2024-06-28 02:59:50,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 282 transitions, 3375 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 02:59:50,071 INFO L231 Difference]: Finished difference. Result has 232 places, 272 transitions, 2821 flow [2024-06-28 02:59:50,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2625, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2821, PETRI_PLACES=232, PETRI_TRANSITIONS=272} [2024-06-28 02:59:50,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-28 02:59:50,071 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 272 transitions, 2821 flow [2024-06-28 02:59:50,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:50,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:50,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:50,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 02:59:50,072 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:50,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:50,072 INFO L85 PathProgramCache]: Analyzing trace with hash 611124495, now seen corresponding path program 7 times [2024-06-28 02:59:50,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:50,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732564062] [2024-06-28 02:59:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:50,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:50,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:50,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732564062] [2024-06-28 02:59:50,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732564062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:50,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:50,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:59:50,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409521598] [2024-06-28 02:59:50,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:50,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:59:50,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:50,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:59:50,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:59:50,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 02:59:50,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 272 transitions, 2821 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:50,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:50,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 02:59:50,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:51,896 INFO L124 PetriNetUnfolderBase]: 3139/5109 cut-off events. [2024-06-28 02:59:51,896 INFO L125 PetriNetUnfolderBase]: For 656288/656291 co-relation queries the response was YES. [2024-06-28 02:59:51,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43512 conditions, 5109 events. 3139/5109 cut-off events. For 656288/656291 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31389 event pairs, 852 based on Foata normal form. 4/5053 useless extension candidates. Maximal degree in co-relation 43398. Up to 4585 conditions per place. [2024-06-28 02:59:51,949 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 195 selfloop transitions, 63 changer transitions 0/281 dead transitions. [2024-06-28 02:59:51,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 281 transitions, 3361 flow [2024-06-28 02:59:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 02:59:51,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-28 02:59:51,950 INFO L175 Difference]: Start difference. First operand has 232 places, 272 transitions, 2821 flow. Second operand 7 states and 136 transitions. [2024-06-28 02:59:51,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 281 transitions, 3361 flow [2024-06-28 02:59:52,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 281 transitions, 3166 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-28 02:59:52,696 INFO L231 Difference]: Finished difference. Result has 235 places, 272 transitions, 2760 flow [2024-06-28 02:59:52,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2760, PETRI_PLACES=235, PETRI_TRANSITIONS=272} [2024-06-28 02:59:52,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-28 02:59:52,697 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 272 transitions, 2760 flow [2024-06-28 02:59:52,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:52,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:52,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:52,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 02:59:52,697 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:52,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:52,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1357996962, now seen corresponding path program 1 times [2024-06-28 02:59:52,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:52,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075217356] [2024-06-28 02:59:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:52,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:53,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:53,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075217356] [2024-06-28 02:59:53,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075217356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:53,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:53,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:59:53,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149600409] [2024-06-28 02:59:53,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:53,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:59:53,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:53,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:59:53,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:59:53,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:59:53,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 272 transitions, 2760 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:53,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:53,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:59:53,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:55,141 INFO L124 PetriNetUnfolderBase]: 3329/5318 cut-off events. [2024-06-28 02:59:55,142 INFO L125 PetriNetUnfolderBase]: For 676454/676454 co-relation queries the response was YES. [2024-06-28 02:59:55,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44827 conditions, 5318 events. 3329/5318 cut-off events. For 676454/676454 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31890 event pairs, 793 based on Foata normal form. 4/5302 useless extension candidates. Maximal degree in co-relation 44712. Up to 4665 conditions per place. [2024-06-28 02:59:55,208 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 217 selfloop transitions, 88 changer transitions 0/310 dead transitions. [2024-06-28 02:59:55,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 310 transitions, 3550 flow [2024-06-28 02:59:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:59:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:59:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 02:59:55,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-28 02:59:55,209 INFO L175 Difference]: Start difference. First operand has 235 places, 272 transitions, 2760 flow. Second operand 10 states and 196 transitions. [2024-06-28 02:59:55,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 310 transitions, 3550 flow [2024-06-28 02:59:56,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 310 transitions, 3397 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 02:59:56,088 INFO L231 Difference]: Finished difference. Result has 239 places, 277 transitions, 2880 flow [2024-06-28 02:59:56,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2607, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2880, PETRI_PLACES=239, PETRI_TRANSITIONS=277} [2024-06-28 02:59:56,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-28 02:59:56,089 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 277 transitions, 2880 flow [2024-06-28 02:59:56,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:56,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:56,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:56,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 02:59:56,089 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:56,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash -674250522, now seen corresponding path program 2 times [2024-06-28 02:59:56,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:56,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162619756] [2024-06-28 02:59:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:56,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:57,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:57,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162619756] [2024-06-28 02:59:57,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162619756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:57,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:57,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:59:57,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877728151] [2024-06-28 02:59:57,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:57,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:59:57,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:57,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:59:57,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:59:57,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 02:59:57,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 277 transitions, 2880 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:57,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:57,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 02:59:57,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:58,492 INFO L124 PetriNetUnfolderBase]: 3346/5346 cut-off events. [2024-06-28 02:59:58,492 INFO L125 PetriNetUnfolderBase]: For 697558/697558 co-relation queries the response was YES. [2024-06-28 02:59:58,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46022 conditions, 5346 events. 3346/5346 cut-off events. For 697558/697558 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 32051 event pairs, 791 based on Foata normal form. 4/5332 useless extension candidates. Maximal degree in co-relation 45905. Up to 4692 conditions per place. [2024-06-28 02:59:58,549 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 224 selfloop transitions, 88 changer transitions 0/317 dead transitions. [2024-06-28 02:59:58,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 317 transitions, 3710 flow [2024-06-28 02:59:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:59:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:59:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 02:59:58,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-28 02:59:58,550 INFO L175 Difference]: Start difference. First operand has 239 places, 277 transitions, 2880 flow. Second operand 10 states and 196 transitions. [2024-06-28 02:59:58,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 317 transitions, 3710 flow [2024-06-28 02:59:59,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 317 transitions, 3477 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 02:59:59,312 INFO L231 Difference]: Finished difference. Result has 243 places, 282 transitions, 2930 flow [2024-06-28 02:59:59,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2930, PETRI_PLACES=243, PETRI_TRANSITIONS=282} [2024-06-28 02:59:59,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-28 02:59:59,316 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 282 transitions, 2930 flow [2024-06-28 02:59:59,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:59,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:59,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:59,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 02:59:59,316 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:59,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1057896380, now seen corresponding path program 3 times [2024-06-28 02:59:59,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:59,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144705484] [2024-06-28 02:59:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:00,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:00,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144705484] [2024-06-28 03:00:00,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144705484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:00,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:00,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:00:00,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752820233] [2024-06-28 03:00:00,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:00,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:00:00,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:00,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:00:00,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:00:00,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:00:00,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 282 transitions, 2930 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:00,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:00,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:00:00,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:01,839 INFO L124 PetriNetUnfolderBase]: 3374/5391 cut-off events. [2024-06-28 03:00:01,839 INFO L125 PetriNetUnfolderBase]: For 717684/717684 co-relation queries the response was YES. [2024-06-28 03:00:01,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46899 conditions, 5391 events. 3374/5391 cut-off events. For 717684/717684 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 32375 event pairs, 793 based on Foata normal form. 4/5375 useless extension candidates. Maximal degree in co-relation 46780. Up to 4726 conditions per place. [2024-06-28 03:00:01,901 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 217 selfloop transitions, 102 changer transitions 0/324 dead transitions. [2024-06-28 03:00:01,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 324 transitions, 3818 flow [2024-06-28 03:00:01,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:00:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:00:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 03:00:01,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-28 03:00:01,902 INFO L175 Difference]: Start difference. First operand has 243 places, 282 transitions, 2930 flow. Second operand 10 states and 196 transitions. [2024-06-28 03:00:01,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 324 transitions, 3818 flow [2024-06-28 03:00:02,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 324 transitions, 3567 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-28 03:00:02,818 INFO L231 Difference]: Finished difference. Result has 247 places, 293 transitions, 3068 flow [2024-06-28 03:00:02,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2695, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3068, PETRI_PLACES=247, PETRI_TRANSITIONS=293} [2024-06-28 03:00:02,818 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-28 03:00:02,818 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 293 transitions, 3068 flow [2024-06-28 03:00:02,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:02,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:02,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:02,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:00:02,818 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:02,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1047420860, now seen corresponding path program 4 times [2024-06-28 03:00:02,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:02,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342262227] [2024-06-28 03:00:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:02,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:03,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:03,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342262227] [2024-06-28 03:00:03,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342262227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:03,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:03,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:00:03,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618784176] [2024-06-28 03:00:03,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:03,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:00:03,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:03,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:00:03,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:00:04,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:00:04,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 293 transitions, 3068 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:04,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:04,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:00:04,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:05,392 INFO L124 PetriNetUnfolderBase]: 3407/5460 cut-off events. [2024-06-28 03:00:05,392 INFO L125 PetriNetUnfolderBase]: For 727631/727631 co-relation queries the response was YES. [2024-06-28 03:00:05,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47374 conditions, 5460 events. 3407/5460 cut-off events. For 727631/727631 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 33033 event pairs, 625 based on Foata normal form. 4/5444 useless extension candidates. Maximal degree in co-relation 47253. Up to 4574 conditions per place. [2024-06-28 03:00:05,453 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 217 selfloop transitions, 113 changer transitions 0/335 dead transitions. [2024-06-28 03:00:05,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 335 transitions, 4268 flow [2024-06-28 03:00:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:00:05,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:00:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-28 03:00:05,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-28 03:00:05,454 INFO L175 Difference]: Start difference. First operand has 247 places, 293 transitions, 3068 flow. Second operand 10 states and 202 transitions. [2024-06-28 03:00:05,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 335 transitions, 4268 flow [2024-06-28 03:00:06,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 335 transitions, 4033 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 03:00:06,518 INFO L231 Difference]: Finished difference. Result has 253 places, 298 transitions, 3247 flow [2024-06-28 03:00:06,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3247, PETRI_PLACES=253, PETRI_TRANSITIONS=298} [2024-06-28 03:00:06,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-28 03:00:06,518 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 298 transitions, 3247 flow [2024-06-28 03:00:06,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:06,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:06,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:06,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:00:06,519 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:06,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:06,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1342996250, now seen corresponding path program 5 times [2024-06-28 03:00:06,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:06,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521522975] [2024-06-28 03:00:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:06,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:07,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:07,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521522975] [2024-06-28 03:00:07,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521522975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:07,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:07,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:00:07,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450996870] [2024-06-28 03:00:07,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:07,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:00:07,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:07,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:00:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:00:07,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:00:07,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 298 transitions, 3247 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:07,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:07,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:00:07,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:09,023 INFO L124 PetriNetUnfolderBase]: 3399/5448 cut-off events. [2024-06-28 03:00:09,023 INFO L125 PetriNetUnfolderBase]: For 733894/733894 co-relation queries the response was YES. [2024-06-28 03:00:09,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46653 conditions, 5448 events. 3399/5448 cut-off events. For 733894/733894 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32956 event pairs, 800 based on Foata normal form. 4/5432 useless extension candidates. Maximal degree in co-relation 46530. Up to 4773 conditions per place. [2024-06-28 03:00:09,085 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 225 selfloop transitions, 100 changer transitions 0/330 dead transitions. [2024-06-28 03:00:09,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 330 transitions, 4002 flow [2024-06-28 03:00:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:00:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:00:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 03:00:09,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-28 03:00:09,086 INFO L175 Difference]: Start difference. First operand has 253 places, 298 transitions, 3247 flow. Second operand 10 states and 196 transitions. [2024-06-28 03:00:09,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 330 transitions, 4002 flow [2024-06-28 03:00:10,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 330 transitions, 3702 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-28 03:00:10,109 INFO L231 Difference]: Finished difference. Result has 257 places, 299 transitions, 3177 flow [2024-06-28 03:00:10,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3177, PETRI_PLACES=257, PETRI_TRANSITIONS=299} [2024-06-28 03:00:10,110 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-28 03:00:10,110 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 299 transitions, 3177 flow [2024-06-28 03:00:10,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:10,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:10,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:10,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:00:10,111 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:10,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:10,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1300521350, now seen corresponding path program 4 times [2024-06-28 03:00:10,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:10,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045047128] [2024-06-28 03:00:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:10,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:11,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:11,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045047128] [2024-06-28 03:00:11,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045047128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:11,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:11,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:11,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015519732] [2024-06-28 03:00:11,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:11,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:11,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:11,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:11,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 299 transitions, 3177 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:11,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:11,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:11,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:12,400 INFO L124 PetriNetUnfolderBase]: 3236/5282 cut-off events. [2024-06-28 03:00:12,400 INFO L125 PetriNetUnfolderBase]: For 745992/745995 co-relation queries the response was YES. [2024-06-28 03:00:12,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45641 conditions, 5282 events. 3236/5282 cut-off events. For 745992/745995 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32775 event pairs, 757 based on Foata normal form. 4/5226 useless extension candidates. Maximal degree in co-relation 45516. Up to 4737 conditions per place. [2024-06-28 03:00:12,462 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 221 selfloop transitions, 69 changer transitions 0/313 dead transitions. [2024-06-28 03:00:12,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 313 transitions, 3871 flow [2024-06-28 03:00:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:00:12,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:00:12,463 INFO L175 Difference]: Start difference. First operand has 257 places, 299 transitions, 3177 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:00:12,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 313 transitions, 3871 flow [2024-06-28 03:00:13,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 313 transitions, 3644 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 03:00:13,606 INFO L231 Difference]: Finished difference. Result has 258 places, 303 transitions, 3191 flow [2024-06-28 03:00:13,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3191, PETRI_PLACES=258, PETRI_TRANSITIONS=303} [2024-06-28 03:00:13,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-28 03:00:13,606 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 303 transitions, 3191 flow [2024-06-28 03:00:13,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:13,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:13,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:13,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:00:13,607 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:13,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:13,608 INFO L85 PathProgramCache]: Analyzing trace with hash 611133950, now seen corresponding path program 5 times [2024-06-28 03:00:13,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:13,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588068924] [2024-06-28 03:00:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:13,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:14,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:14,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588068924] [2024-06-28 03:00:14,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588068924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:14,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:14,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:14,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440506089] [2024-06-28 03:00:14,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:14,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:14,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:14,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:14,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:14,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 303 transitions, 3191 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:14,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:14,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:14,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:15,867 INFO L124 PetriNetUnfolderBase]: 3264/5326 cut-off events. [2024-06-28 03:00:15,867 INFO L125 PetriNetUnfolderBase]: For 768485/768488 co-relation queries the response was YES. [2024-06-28 03:00:15,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46567 conditions, 5326 events. 3264/5326 cut-off events. For 768485/768488 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33105 event pairs, 759 based on Foata normal form. 4/5270 useless extension candidates. Maximal degree in co-relation 46441. Up to 4748 conditions per place. [2024-06-28 03:00:15,931 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 226 selfloop transitions, 73 changer transitions 0/322 dead transitions. [2024-06-28 03:00:15,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 322 transitions, 4171 flow [2024-06-28 03:00:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:15,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 03:00:15,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-28 03:00:15,932 INFO L175 Difference]: Start difference. First operand has 258 places, 303 transitions, 3191 flow. Second operand 8 states and 154 transitions. [2024-06-28 03:00:15,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 322 transitions, 4171 flow [2024-06-28 03:00:16,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 322 transitions, 3958 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-28 03:00:16,990 INFO L231 Difference]: Finished difference. Result has 261 places, 311 transitions, 3345 flow [2024-06-28 03:00:16,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3345, PETRI_PLACES=261, PETRI_TRANSITIONS=311} [2024-06-28 03:00:16,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-28 03:00:16,991 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 311 transitions, 3345 flow [2024-06-28 03:00:16,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:16,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:16,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:16,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:00:16,991 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:16,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:16,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1315771955, now seen corresponding path program 2 times [2024-06-28 03:00:16,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:16,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998552922] [2024-06-28 03:00:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:16,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:18,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:18,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998552922] [2024-06-28 03:00:18,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998552922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:18,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:18,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:18,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959797018] [2024-06-28 03:00:18,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:18,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:18,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:18,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:18,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 311 transitions, 3345 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:18,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:18,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:18,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:19,275 INFO L124 PetriNetUnfolderBase]: 3274/5340 cut-off events. [2024-06-28 03:00:19,275 INFO L125 PetriNetUnfolderBase]: For 794185/794185 co-relation queries the response was YES. [2024-06-28 03:00:19,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47515 conditions, 5340 events. 3274/5340 cut-off events. For 794185/794185 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33106 event pairs, 728 based on Foata normal form. 2/5291 useless extension candidates. Maximal degree in co-relation 47387. Up to 4961 conditions per place. [2024-06-28 03:00:19,338 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 285 selfloop transitions, 18 changer transitions 0/326 dead transitions. [2024-06-28 03:00:19,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 326 transitions, 4069 flow [2024-06-28 03:00:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 03:00:19,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 03:00:19,340 INFO L175 Difference]: Start difference. First operand has 261 places, 311 transitions, 3345 flow. Second operand 8 states and 144 transitions. [2024-06-28 03:00:19,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 326 transitions, 4069 flow [2024-06-28 03:00:20,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 326 transitions, 3879 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-28 03:00:20,105 INFO L231 Difference]: Finished difference. Result has 265 places, 314 transitions, 3291 flow [2024-06-28 03:00:20,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3155, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3291, PETRI_PLACES=265, PETRI_TRANSITIONS=314} [2024-06-28 03:00:20,105 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-28 03:00:20,105 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 314 transitions, 3291 flow [2024-06-28 03:00:20,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:20,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:20,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:20,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:00:20,106 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:20,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1300534835, now seen corresponding path program 3 times [2024-06-28 03:00:20,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:20,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804102340] [2024-06-28 03:00:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:20,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:21,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:21,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804102340] [2024-06-28 03:00:21,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804102340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:21,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:21,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:21,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085974852] [2024-06-28 03:00:21,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:21,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:21,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:21,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:21,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:21,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 314 transitions, 3291 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:21,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:21,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:21,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:22,345 INFO L124 PetriNetUnfolderBase]: 3284/5355 cut-off events. [2024-06-28 03:00:22,345 INFO L125 PetriNetUnfolderBase]: For 811673/811676 co-relation queries the response was YES. [2024-06-28 03:00:22,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48035 conditions, 5355 events. 3284/5355 cut-off events. For 811673/811676 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33224 event pairs, 736 based on Foata normal form. 4/5307 useless extension candidates. Maximal degree in co-relation 47905. Up to 4962 conditions per place. [2024-06-28 03:00:22,411 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 284 selfloop transitions, 22 changer transitions 0/329 dead transitions. [2024-06-28 03:00:22,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 329 transitions, 4032 flow [2024-06-28 03:00:22,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:22,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 03:00:22,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-28 03:00:22,412 INFO L175 Difference]: Start difference. First operand has 265 places, 314 transitions, 3291 flow. Second operand 8 states and 145 transitions. [2024-06-28 03:00:22,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 329 transitions, 4032 flow [2024-06-28 03:00:23,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 329 transitions, 3888 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-28 03:00:23,547 INFO L231 Difference]: Finished difference. Result has 266 places, 317 transitions, 3297 flow [2024-06-28 03:00:23,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3297, PETRI_PLACES=266, PETRI_TRANSITIONS=317} [2024-06-28 03:00:23,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-28 03:00:23,548 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 317 transitions, 3297 flow [2024-06-28 03:00:23,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:23,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:23,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:23,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:00:23,548 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:23,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash 625866545, now seen corresponding path program 4 times [2024-06-28 03:00:23,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:23,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271035593] [2024-06-28 03:00:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:23,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:24,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:24,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271035593] [2024-06-28 03:00:24,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271035593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:24,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:24,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:24,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920736593] [2024-06-28 03:00:24,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:24,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:24,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:24,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:24,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 317 transitions, 3297 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:24,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:24,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:24,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:25,671 INFO L124 PetriNetUnfolderBase]: 3278/5347 cut-off events. [2024-06-28 03:00:25,672 INFO L125 PetriNetUnfolderBase]: For 820746/820749 co-relation queries the response was YES. [2024-06-28 03:00:25,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48092 conditions, 5347 events. 3278/5347 cut-off events. For 820746/820749 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 33215 event pairs, 733 based on Foata normal form. 4/5299 useless extension candidates. Maximal degree in co-relation 47962. Up to 4919 conditions per place. [2024-06-28 03:00:25,736 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 272 selfloop transitions, 39 changer transitions 0/334 dead transitions. [2024-06-28 03:00:25,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 334 transitions, 4058 flow [2024-06-28 03:00:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:00:25,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 03:00:25,737 INFO L175 Difference]: Start difference. First operand has 266 places, 317 transitions, 3297 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:00:25,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 334 transitions, 4058 flow [2024-06-28 03:00:26,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 334 transitions, 3930 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-28 03:00:26,801 INFO L231 Difference]: Finished difference. Result has 268 places, 320 transitions, 3359 flow [2024-06-28 03:00:26,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3359, PETRI_PLACES=268, PETRI_TRANSITIONS=320} [2024-06-28 03:00:26,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-28 03:00:26,801 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 320 transitions, 3359 flow [2024-06-28 03:00:26,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:26,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:26,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:00:26,801 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:26,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1315266500, now seen corresponding path program 6 times [2024-06-28 03:00:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:26,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262791868] [2024-06-28 03:00:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:26,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:27,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:27,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262791868] [2024-06-28 03:00:27,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262791868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:27,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:27,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:27,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219618] [2024-06-28 03:00:27,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:27,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:27,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:27,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:27,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:27,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:27,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 320 transitions, 3359 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:27,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:27,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:27,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:28,946 INFO L124 PetriNetUnfolderBase]: 3282/5353 cut-off events. [2024-06-28 03:00:28,946 INFO L125 PetriNetUnfolderBase]: For 832104/832107 co-relation queries the response was YES. [2024-06-28 03:00:28,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48446 conditions, 5353 events. 3282/5353 cut-off events. For 832104/832107 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33265 event pairs, 755 based on Foata normal form. 4/5297 useless extension candidates. Maximal degree in co-relation 48315. Up to 4692 conditions per place. [2024-06-28 03:00:29,011 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 225 selfloop transitions, 99 changer transitions 0/347 dead transitions. [2024-06-28 03:00:29,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 347 transitions, 4639 flow [2024-06-28 03:00:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:00:29,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 03:00:29,012 INFO L175 Difference]: Start difference. First operand has 268 places, 320 transitions, 3359 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:00:29,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 347 transitions, 4639 flow [2024-06-28 03:00:30,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 347 transitions, 4471 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-28 03:00:30,272 INFO L231 Difference]: Finished difference. Result has 272 places, 335 transitions, 3731 flow [2024-06-28 03:00:30,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3191, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3731, PETRI_PLACES=272, PETRI_TRANSITIONS=335} [2024-06-28 03:00:30,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-28 03:00:30,272 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 335 transitions, 3731 flow [2024-06-28 03:00:30,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:30,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:30,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:30,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:00:30,273 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:30,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1922191665, now seen corresponding path program 1 times [2024-06-28 03:00:30,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:30,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847225763] [2024-06-28 03:00:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:30,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:30,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:30,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847225763] [2024-06-28 03:00:30,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847225763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:30,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:30,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:30,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887718591] [2024-06-28 03:00:30,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:30,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:30,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:30,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:30,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:31,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:31,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 335 transitions, 3731 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:31,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:31,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:31,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:32,274 INFO L124 PetriNetUnfolderBase]: 3362/5480 cut-off events. [2024-06-28 03:00:32,275 INFO L125 PetriNetUnfolderBase]: For 858834/858834 co-relation queries the response was YES. [2024-06-28 03:00:32,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49922 conditions, 5480 events. 3362/5480 cut-off events. For 858834/858834 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33880 event pairs, 732 based on Foata normal form. 2/5479 useless extension candidates. Maximal degree in co-relation 49788. Up to 5046 conditions per place. [2024-06-28 03:00:32,338 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 317 selfloop transitions, 21 changer transitions 0/358 dead transitions. [2024-06-28 03:00:32,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 358 transitions, 4529 flow [2024-06-28 03:00:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:00:32,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:00:32,339 INFO L175 Difference]: Start difference. First operand has 272 places, 335 transitions, 3731 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:00:32,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 358 transitions, 4529 flow [2024-06-28 03:00:33,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 358 transitions, 4311 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-28 03:00:33,563 INFO L231 Difference]: Finished difference. Result has 277 places, 338 transitions, 3627 flow [2024-06-28 03:00:33,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3513, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3627, PETRI_PLACES=277, PETRI_TRANSITIONS=338} [2024-06-28 03:00:33,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-28 03:00:33,563 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 338 transitions, 3627 flow [2024-06-28 03:00:33,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:33,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:33,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:33,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:00:33,564 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:33,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:33,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1879780593, now seen corresponding path program 2 times [2024-06-28 03:00:33,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:33,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951736041] [2024-06-28 03:00:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:33,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:34,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:34,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951736041] [2024-06-28 03:00:34,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951736041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:34,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:34,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:34,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354402905] [2024-06-28 03:00:34,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:34,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:34,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:34,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:34,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:34,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:34,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 338 transitions, 3627 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:34,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:34,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:34,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:35,627 INFO L124 PetriNetUnfolderBase]: 3372/5506 cut-off events. [2024-06-28 03:00:35,627 INFO L125 PetriNetUnfolderBase]: For 871667/871667 co-relation queries the response was YES. [2024-06-28 03:00:35,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49779 conditions, 5506 events. 3372/5506 cut-off events. For 871667/871667 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34133 event pairs, 742 based on Foata normal form. 2/5505 useless extension candidates. Maximal degree in co-relation 49643. Up to 5051 conditions per place. [2024-06-28 03:00:35,692 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 313 selfloop transitions, 26 changer transitions 0/359 dead transitions. [2024-06-28 03:00:35,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 359 transitions, 4427 flow [2024-06-28 03:00:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:00:35,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:00:35,693 INFO L175 Difference]: Start difference. First operand has 277 places, 338 transitions, 3627 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:00:35,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 359 transitions, 4427 flow [2024-06-28 03:00:36,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 359 transitions, 4335 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 03:00:36,691 INFO L231 Difference]: Finished difference. Result has 279 places, 341 transitions, 3665 flow [2024-06-28 03:00:36,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3535, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3665, PETRI_PLACES=279, PETRI_TRANSITIONS=341} [2024-06-28 03:00:36,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-28 03:00:36,691 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 341 transitions, 3665 flow [2024-06-28 03:00:36,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:36,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:36,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:36,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 03:00:36,692 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:36,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:36,692 INFO L85 PathProgramCache]: Analyzing trace with hash 64618548, now seen corresponding path program 1 times [2024-06-28 03:00:36,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:36,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706484266] [2024-06-28 03:00:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:36,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:37,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:37,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706484266] [2024-06-28 03:00:37,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706484266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:37,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:37,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:37,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562726089] [2024-06-28 03:00:37,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:37,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:37,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:37,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:37,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:37,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:37,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 341 transitions, 3665 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:37,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:37,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:37,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:38,850 INFO L124 PetriNetUnfolderBase]: 3382/5512 cut-off events. [2024-06-28 03:00:38,851 INFO L125 PetriNetUnfolderBase]: For 894757/894757 co-relation queries the response was YES. [2024-06-28 03:00:38,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50449 conditions, 5512 events. 3382/5512 cut-off events. For 894757/894757 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34119 event pairs, 731 based on Foata normal form. 3/5512 useless extension candidates. Maximal degree in co-relation 50312. Up to 5080 conditions per place. [2024-06-28 03:00:38,917 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 21 changer transitions 0/361 dead transitions. [2024-06-28 03:00:38,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 361 transitions, 4465 flow [2024-06-28 03:00:38,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:00:38,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-28 03:00:38,918 INFO L175 Difference]: Start difference. First operand has 279 places, 341 transitions, 3665 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:00:38,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 361 transitions, 4465 flow [2024-06-28 03:00:40,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 361 transitions, 4357 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:00:40,169 INFO L231 Difference]: Finished difference. Result has 281 places, 344 transitions, 3679 flow [2024-06-28 03:00:40,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3679, PETRI_PLACES=281, PETRI_TRANSITIONS=344} [2024-06-28 03:00:40,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-28 03:00:40,169 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 344 transitions, 3679 flow [2024-06-28 03:00:40,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:40,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:40,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:40,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 03:00:40,170 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:40,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:40,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1885344783, now seen corresponding path program 3 times [2024-06-28 03:00:40,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:40,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586450683] [2024-06-28 03:00:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:40,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:41,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:41,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586450683] [2024-06-28 03:00:41,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586450683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:41,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:41,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:41,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590571803] [2024-06-28 03:00:41,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:41,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:41,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:41,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:41,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:41,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:41,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 344 transitions, 3679 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:41,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:41,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:41,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:42,265 INFO L124 PetriNetUnfolderBase]: 3392/5538 cut-off events. [2024-06-28 03:00:42,265 INFO L125 PetriNetUnfolderBase]: For 908534/908534 co-relation queries the response was YES. [2024-06-28 03:00:42,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50972 conditions, 5538 events. 3392/5538 cut-off events. For 908534/908534 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34381 event pairs, 741 based on Foata normal form. 2/5537 useless extension candidates. Maximal degree in co-relation 50834. Up to 5065 conditions per place. [2024-06-28 03:00:42,330 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 311 selfloop transitions, 32 changer transitions 0/363 dead transitions. [2024-06-28 03:00:42,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 363 transitions, 4489 flow [2024-06-28 03:00:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:00:42,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-28 03:00:42,331 INFO L175 Difference]: Start difference. First operand has 281 places, 344 transitions, 3679 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:00:42,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 363 transitions, 4489 flow [2024-06-28 03:00:43,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 363 transitions, 4389 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 03:00:43,697 INFO L231 Difference]: Finished difference. Result has 283 places, 347 transitions, 3729 flow [2024-06-28 03:00:43,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3729, PETRI_PLACES=283, PETRI_TRANSITIONS=347} [2024-06-28 03:00:43,698 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-28 03:00:43,698 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 347 transitions, 3729 flow [2024-06-28 03:00:43,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:43,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:43,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:43,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 03:00:43,698 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:43,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:43,699 INFO L85 PathProgramCache]: Analyzing trace with hash 360346058, now seen corresponding path program 2 times [2024-06-28 03:00:43,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:43,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964630775] [2024-06-28 03:00:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:43,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:44,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:44,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964630775] [2024-06-28 03:00:44,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964630775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:44,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:44,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:44,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729784620] [2024-06-28 03:00:44,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:44,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:44,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:44,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:44,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:44,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:44,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 347 transitions, 3729 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:44,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:44,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:44,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:45,931 INFO L124 PetriNetUnfolderBase]: 3402/5544 cut-off events. [2024-06-28 03:00:45,931 INFO L125 PetriNetUnfolderBase]: For 932826/932826 co-relation queries the response was YES. [2024-06-28 03:00:45,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51670 conditions, 5544 events. 3402/5544 cut-off events. For 932826/932826 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34328 event pairs, 731 based on Foata normal form. 3/5544 useless extension candidates. Maximal degree in co-relation 51531. Up to 5100 conditions per place. [2024-06-28 03:00:46,002 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 25 changer transitions 0/365 dead transitions. [2024-06-28 03:00:46,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 365 transitions, 4539 flow [2024-06-28 03:00:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:00:46,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-28 03:00:46,004 INFO L175 Difference]: Start difference. First operand has 283 places, 347 transitions, 3729 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:00:46,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 365 transitions, 4539 flow [2024-06-28 03:00:47,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 365 transitions, 4411 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 03:00:47,338 INFO L231 Difference]: Finished difference. Result has 285 places, 350 transitions, 3739 flow [2024-06-28 03:00:47,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3601, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3739, PETRI_PLACES=285, PETRI_TRANSITIONS=350} [2024-06-28 03:00:47,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-28 03:00:47,338 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 350 transitions, 3739 flow [2024-06-28 03:00:47,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:47,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:47,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:47,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 03:00:47,339 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:47,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1885352440, now seen corresponding path program 3 times [2024-06-28 03:00:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:47,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884163088] [2024-06-28 03:00:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:47,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:48,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:48,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884163088] [2024-06-28 03:00:48,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884163088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:48,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:48,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:48,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703798477] [2024-06-28 03:00:48,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:48,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:48,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:48,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:48,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:48,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:48,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 350 transitions, 3739 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:48,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:48,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:48,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:49,504 INFO L124 PetriNetUnfolderBase]: 3412/5570 cut-off events. [2024-06-28 03:00:49,504 INFO L125 PetriNetUnfolderBase]: For 951188/951188 co-relation queries the response was YES. [2024-06-28 03:00:49,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52183 conditions, 5570 events. 3412/5570 cut-off events. For 951188/951188 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34585 event pairs, 741 based on Foata normal form. 3/5570 useless extension candidates. Maximal degree in co-relation 52043. Up to 5092 conditions per place. [2024-06-28 03:00:49,578 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 314 selfloop transitions, 35 changer transitions 0/369 dead transitions. [2024-06-28 03:00:49,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 369 transitions, 4565 flow [2024-06-28 03:00:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:00:49,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 03:00:49,579 INFO L175 Difference]: Start difference. First operand has 285 places, 350 transitions, 3739 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:00:49,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 369 transitions, 4565 flow [2024-06-28 03:00:51,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 369 transitions, 4449 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 03:00:51,241 INFO L231 Difference]: Finished difference. Result has 287 places, 353 transitions, 3788 flow [2024-06-28 03:00:51,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3788, PETRI_PLACES=287, PETRI_TRANSITIONS=353} [2024-06-28 03:00:51,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-28 03:00:51,242 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 353 transitions, 3788 flow [2024-06-28 03:00:51,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:51,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:51,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:51,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 03:00:51,242 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:51,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:51,243 INFO L85 PathProgramCache]: Analyzing trace with hash 616846351, now seen corresponding path program 4 times [2024-06-28 03:00:51,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:51,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341480566] [2024-06-28 03:00:51,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:51,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:52,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:52,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341480566] [2024-06-28 03:00:52,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341480566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:52,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:52,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:52,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699691563] [2024-06-28 03:00:52,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:52,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:52,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:52,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:52,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:52,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 353 transitions, 3788 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:52,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:52,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:52,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:53,368 INFO L124 PetriNetUnfolderBase]: 3414/5576 cut-off events. [2024-06-28 03:00:53,368 INFO L125 PetriNetUnfolderBase]: For 961038/961038 co-relation queries the response was YES. [2024-06-28 03:00:53,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52535 conditions, 5576 events. 3414/5576 cut-off events. For 961038/961038 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34663 event pairs, 751 based on Foata normal form. 2/5572 useless extension candidates. Maximal degree in co-relation 52394. Up to 5081 conditions per place. [2024-06-28 03:00:53,444 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 308 selfloop transitions, 41 changer transitions 0/369 dead transitions. [2024-06-28 03:00:53,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 369 transitions, 4610 flow [2024-06-28 03:00:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:00:53,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 03:00:53,445 INFO L175 Difference]: Start difference. First operand has 287 places, 353 transitions, 3788 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:00:53,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 369 transitions, 4610 flow [2024-06-28 03:00:55,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 369 transitions, 4469 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 03:00:55,500 INFO L231 Difference]: Finished difference. Result has 289 places, 356 transitions, 3825 flow [2024-06-28 03:00:55,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3825, PETRI_PLACES=289, PETRI_TRANSITIONS=356} [2024-06-28 03:00:55,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-28 03:00:55,501 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 356 transitions, 3825 flow [2024-06-28 03:00:55,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:55,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:55,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:55,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 03:00:55,501 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:55,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:55,502 INFO L85 PathProgramCache]: Analyzing trace with hash 616846568, now seen corresponding path program 4 times [2024-06-28 03:00:55,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:55,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468550695] [2024-06-28 03:00:55,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:55,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:56,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:56,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468550695] [2024-06-28 03:00:56,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468550695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:56,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:56,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:56,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704049519] [2024-06-28 03:00:56,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:56,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:56,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:56,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:56,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:00:56,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 356 transitions, 3825 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:56,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:56,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:00:56,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:57,850 INFO L124 PetriNetUnfolderBase]: 3429/5597 cut-off events. [2024-06-28 03:00:57,851 INFO L125 PetriNetUnfolderBase]: For 986006/986006 co-relation queries the response was YES. [2024-06-28 03:00:57,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53295 conditions, 5597 events. 3429/5597 cut-off events. For 986006/986006 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34795 event pairs, 748 based on Foata normal form. 3/5594 useless extension candidates. Maximal degree in co-relation 53153. Up to 5127 conditions per place. [2024-06-28 03:00:57,926 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 319 selfloop transitions, 32 changer transitions 0/371 dead transitions. [2024-06-28 03:00:57,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 371 transitions, 4651 flow [2024-06-28 03:00:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:57,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 03:00:57,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-28 03:00:57,928 INFO L175 Difference]: Start difference. First operand has 289 places, 356 transitions, 3825 flow. Second operand 8 states and 147 transitions. [2024-06-28 03:00:57,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 371 transitions, 4651 flow [2024-06-28 03:01:00,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 371 transitions, 4495 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:00,453 INFO L231 Difference]: Finished difference. Result has 291 places, 359 transitions, 3835 flow [2024-06-28 03:01:00,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3669, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3835, PETRI_PLACES=291, PETRI_TRANSITIONS=359} [2024-06-28 03:01:00,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-28 03:01:00,454 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 359 transitions, 3835 flow [2024-06-28 03:01:00,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:00,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:00,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:00,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 03:01:00,454 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:00,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:00,454 INFO L85 PathProgramCache]: Analyzing trace with hash 616854008, now seen corresponding path program 5 times [2024-06-28 03:01:00,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:00,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118220764] [2024-06-28 03:01:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:00,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:01,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118220764] [2024-06-28 03:01:01,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118220764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:01,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:01,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:01:01,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358859247] [2024-06-28 03:01:01,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:01,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:01:01,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:01:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:01:01,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:01:01,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 359 transitions, 3835 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:01,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:01,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:01:01,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:02,830 INFO L124 PetriNetUnfolderBase]: 3444/5618 cut-off events. [2024-06-28 03:01:02,830 INFO L125 PetriNetUnfolderBase]: For 1005705/1005705 co-relation queries the response was YES. [2024-06-28 03:01:02,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53872 conditions, 5618 events. 3444/5618 cut-off events. For 1005705/1005705 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34959 event pairs, 748 based on Foata normal form. 3/5615 useless extension candidates. Maximal degree in co-relation 53729. Up to 5129 conditions per place. [2024-06-28 03:01:02,909 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 316 selfloop transitions, 39 changer transitions 0/375 dead transitions. [2024-06-28 03:01:02,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 375 transitions, 4677 flow [2024-06-28 03:01:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:01:02,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 03:01:02,910 INFO L175 Difference]: Start difference. First operand has 291 places, 359 transitions, 3835 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:01:02,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 375 transitions, 4677 flow [2024-06-28 03:01:04,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 375 transitions, 4533 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:04,942 INFO L231 Difference]: Finished difference. Result has 293 places, 362 transitions, 3878 flow [2024-06-28 03:01:04,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3878, PETRI_PLACES=293, PETRI_TRANSITIONS=362} [2024-06-28 03:01:04,943 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-28 03:01:04,943 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 362 transitions, 3878 flow [2024-06-28 03:01:04,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:04,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:04,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:04,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 03:01:04,943 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:04,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:04,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1125061614, now seen corresponding path program 6 times [2024-06-28 03:01:04,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:04,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505218285] [2024-06-28 03:01:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:04,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:06,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:06,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505218285] [2024-06-28 03:01:06,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505218285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:06,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:06,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:01:06,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687352791] [2024-06-28 03:01:06,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:06,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:01:06,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:06,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:01:06,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:01:06,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:01:06,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 362 transitions, 3878 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:06,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:06,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:01:06,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:07,235 INFO L124 PetriNetUnfolderBase]: 3438/5610 cut-off events. [2024-06-28 03:01:07,236 INFO L125 PetriNetUnfolderBase]: For 1009999/1009999 co-relation queries the response was YES. [2024-06-28 03:01:07,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53956 conditions, 5610 events. 3438/5610 cut-off events. For 1009999/1009999 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34876 event pairs, 743 based on Foata normal form. 2/5606 useless extension candidates. Maximal degree in co-relation 53812. Up to 5105 conditions per place. [2024-06-28 03:01:07,316 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 322 selfloop transitions, 54 changer transitions 0/396 dead transitions. [2024-06-28 03:01:07,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 396 transitions, 4909 flow [2024-06-28 03:01:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:01:07,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-28 03:01:07,317 INFO L175 Difference]: Start difference. First operand has 293 places, 362 transitions, 3878 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:01:07,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 396 transitions, 4909 flow [2024-06-28 03:01:10,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 396 transitions, 4671 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:10,135 INFO L231 Difference]: Finished difference. Result has 297 places, 383 transitions, 4056 flow [2024-06-28 03:01:10,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3715, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4056, PETRI_PLACES=297, PETRI_TRANSITIONS=383} [2024-06-28 03:01:10,135 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-28 03:01:10,135 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 383 transitions, 4056 flow [2024-06-28 03:01:10,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:10,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:10,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:10,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 03:01:10,136 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:10,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1315789811, now seen corresponding path program 1 times [2024-06-28 03:01:10,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:10,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726770898] [2024-06-28 03:01:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:10,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:11,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:11,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726770898] [2024-06-28 03:01:11,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726770898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:11,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:11,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:01:11,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265661842] [2024-06-28 03:01:11,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:11,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:01:11,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:11,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:01:11,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:01:11,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:01:11,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 383 transitions, 4056 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:01:11,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:11,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:01:11,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:13,000 INFO L124 PetriNetUnfolderBase]: 3386/5514 cut-off events. [2024-06-28 03:01:13,000 INFO L125 PetriNetUnfolderBase]: For 1018865/1018865 co-relation queries the response was YES. [2024-06-28 03:01:13,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53762 conditions, 5514 events. 3386/5514 cut-off events. For 1018865/1018865 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34193 event pairs, 733 based on Foata normal form. 2/5465 useless extension candidates. Maximal degree in co-relation 53615. Up to 5079 conditions per place. [2024-06-28 03:01:13,082 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 344 selfloop transitions, 20 changer transitions 0/398 dead transitions. [2024-06-28 03:01:13,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 398 transitions, 4919 flow [2024-06-28 03:01:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:01:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:01:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 03:01:13,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-28 03:01:13,083 INFO L175 Difference]: Start difference. First operand has 297 places, 383 transitions, 4056 flow. Second operand 9 states and 157 transitions. [2024-06-28 03:01:13,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 398 transitions, 4919 flow [2024-06-28 03:01:14,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 398 transitions, 4817 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-28 03:01:14,950 INFO L231 Difference]: Finished difference. Result has 304 places, 386 transitions, 4114 flow [2024-06-28 03:01:14,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3954, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4114, PETRI_PLACES=304, PETRI_TRANSITIONS=386} [2024-06-28 03:01:14,951 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-28 03:01:14,951 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 386 transitions, 4114 flow [2024-06-28 03:01:14,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:01:14,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:14,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:14,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 03:01:14,952 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:14,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:14,953 INFO L85 PathProgramCache]: Analyzing trace with hash -203043823, now seen corresponding path program 1 times [2024-06-28 03:01:14,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:14,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774678996] [2024-06-28 03:01:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:14,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:15,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:15,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774678996] [2024-06-28 03:01:15,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774678996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:15,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:15,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:01:15,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458391584] [2024-06-28 03:01:15,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:15,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:01:15,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:15,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:01:15,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:01:15,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:01:15,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 386 transitions, 4114 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-28 03:01:15,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:15,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:01:15,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:17,170 INFO L124 PetriNetUnfolderBase]: 3403/5540 cut-off events. [2024-06-28 03:01:17,171 INFO L125 PetriNetUnfolderBase]: For 1050120/1050123 co-relation queries the response was YES. [2024-06-28 03:01:17,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54356 conditions, 5540 events. 3403/5540 cut-off events. For 1050120/1050123 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34363 event pairs, 579 based on Foata normal form. 6/5513 useless extension candidates. Maximal degree in co-relation 54206. Up to 4955 conditions per place. [2024-06-28 03:01:17,384 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 341 selfloop transitions, 41 changer transitions 0/416 dead transitions. [2024-06-28 03:01:17,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 416 transitions, 5071 flow [2024-06-28 03:01:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 03:01:17,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-28 03:01:17,385 INFO L175 Difference]: Start difference. First operand has 304 places, 386 transitions, 4114 flow. Second operand 8 states and 163 transitions. [2024-06-28 03:01:17,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 416 transitions, 5071 flow [2024-06-28 03:01:19,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 416 transitions, 4936 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:19,567 INFO L231 Difference]: Finished difference. Result has 306 places, 389 transitions, 4181 flow [2024-06-28 03:01:19,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3979, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4181, PETRI_PLACES=306, PETRI_TRANSITIONS=389} [2024-06-28 03:01:19,567 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-28 03:01:19,568 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 389 transitions, 4181 flow [2024-06-28 03:01:19,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-28 03:01:19,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:19,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:19,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 03:01:19,568 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:19,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:19,569 INFO L85 PathProgramCache]: Analyzing trace with hash -192568303, now seen corresponding path program 2 times [2024-06-28 03:01:19,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:19,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605691428] [2024-06-28 03:01:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:19,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:20,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:20,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605691428] [2024-06-28 03:01:20,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605691428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:20,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:20,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:01:20,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782911850] [2024-06-28 03:01:20,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:20,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:01:20,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:01:20,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:01:20,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:01:20,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 389 transitions, 4181 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-28 03:01:20,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:20,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:01:20,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:21,838 INFO L124 PetriNetUnfolderBase]: 3419/5564 cut-off events. [2024-06-28 03:01:21,839 INFO L125 PetriNetUnfolderBase]: For 1070436/1070439 co-relation queries the response was YES. [2024-06-28 03:01:21,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55042 conditions, 5564 events. 3419/5564 cut-off events. For 1070436/1070439 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34667 event pairs, 733 based on Foata normal form. 6/5517 useless extension candidates. Maximal degree in co-relation 54891. Up to 5025 conditions per place. [2024-06-28 03:01:21,918 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 339 selfloop transitions, 42 changer transitions 0/415 dead transitions. [2024-06-28 03:01:21,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 415 transitions, 5130 flow [2024-06-28 03:01:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:01:21,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 03:01:21,921 INFO L175 Difference]: Start difference. First operand has 306 places, 389 transitions, 4181 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:01:21,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 415 transitions, 5130 flow [2024-06-28 03:01:25,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 415 transitions, 4950 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:25,320 INFO L231 Difference]: Finished difference. Result has 308 places, 392 transitions, 4211 flow [2024-06-28 03:01:25,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4211, PETRI_PLACES=308, PETRI_TRANSITIONS=392} [2024-06-28 03:01:25,321 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-28 03:01:25,321 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 392 transitions, 4211 flow [2024-06-28 03:01:25,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-28 03:01:25,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:25,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:25,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 03:01:25,321 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:25,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash -630125839, now seen corresponding path program 1 times [2024-06-28 03:01:25,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:25,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954491201] [2024-06-28 03:01:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:25,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:26,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:26,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954491201] [2024-06-28 03:01:26,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954491201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:26,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:26,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:01:26,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505925620] [2024-06-28 03:01:26,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:26,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:01:26,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:26,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:01:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:01:26,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:01:26,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 392 transitions, 4211 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:01:26,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:26,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:01:26,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:27,689 INFO L124 PetriNetUnfolderBase]: 3439/5592 cut-off events. [2024-06-28 03:01:27,690 INFO L125 PetriNetUnfolderBase]: For 1093334/1093337 co-relation queries the response was YES. [2024-06-28 03:01:27,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55536 conditions, 5592 events. 3439/5592 cut-off events. For 1093334/1093337 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34810 event pairs, 732 based on Foata normal form. 6/5545 useless extension candidates. Maximal degree in co-relation 55384. Up to 5047 conditions per place. [2024-06-28 03:01:27,767 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 339 selfloop transitions, 47 changer transitions 0/420 dead transitions. [2024-06-28 03:01:27,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 420 transitions, 5192 flow [2024-06-28 03:01:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:01:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:01:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:01:27,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-28 03:01:27,769 INFO L175 Difference]: Start difference. First operand has 308 places, 392 transitions, 4211 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:01:27,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 420 transitions, 5192 flow [2024-06-28 03:01:30,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 420 transitions, 5004 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:30,943 INFO L231 Difference]: Finished difference. Result has 311 places, 396 transitions, 4264 flow [2024-06-28 03:01:30,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4264, PETRI_PLACES=311, PETRI_TRANSITIONS=396} [2024-06-28 03:01:30,943 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-28 03:01:30,943 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 396 transitions, 4264 flow [2024-06-28 03:01:30,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:01:30,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:30,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:30,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 03:01:30,943 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:30,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:30,944 INFO L85 PathProgramCache]: Analyzing trace with hash -121461695, now seen corresponding path program 1 times [2024-06-28 03:01:30,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:30,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690047506] [2024-06-28 03:01:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:30,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:31,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:31,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690047506] [2024-06-28 03:01:31,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690047506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:31,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:31,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:01:31,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103196293] [2024-06-28 03:01:31,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:31,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:01:31,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:31,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:01:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:01:31,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:01:31,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 396 transitions, 4264 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-28 03:01:31,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:31,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:01:31,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:33,055 INFO L124 PetriNetUnfolderBase]: 3613/5811 cut-off events. [2024-06-28 03:01:33,055 INFO L125 PetriNetUnfolderBase]: For 1104453/1104453 co-relation queries the response was YES. [2024-06-28 03:01:33,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57205 conditions, 5811 events. 3613/5811 cut-off events. For 1104453/1104453 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 35569 event pairs, 769 based on Foata normal form. 2/5807 useless extension candidates. Maximal degree in co-relation 57052. Up to 5344 conditions per place. [2024-06-28 03:01:33,137 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 367 selfloop transitions, 50 changer transitions 0/422 dead transitions. [2024-06-28 03:01:33,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 422 transitions, 5292 flow [2024-06-28 03:01:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:01:33,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-28 03:01:33,138 INFO L175 Difference]: Start difference. First operand has 311 places, 396 transitions, 4264 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:01:33,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 422 transitions, 5292 flow [2024-06-28 03:01:36,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 422 transitions, 5079 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-28 03:01:36,492 INFO L231 Difference]: Finished difference. Result has 312 places, 400 transitions, 4290 flow [2024-06-28 03:01:36,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4051, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4290, PETRI_PLACES=312, PETRI_TRANSITIONS=400} [2024-06-28 03:01:36,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-28 03:01:36,492 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 400 transitions, 4290 flow [2024-06-28 03:01:36,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-28 03:01:36,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:36,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:36,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 03:01:36,493 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:36,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash -522104913, now seen corresponding path program 2 times [2024-06-28 03:01:36,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:36,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688191153] [2024-06-28 03:01:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:36,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:37,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:37,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688191153] [2024-06-28 03:01:37,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688191153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:37,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:37,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:01:37,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198761233] [2024-06-28 03:01:37,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:37,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:01:37,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:37,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:01:37,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:01:37,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:01:37,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 400 transitions, 4290 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-28 03:01:37,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:37,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:01:37,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:38,793 INFO L124 PetriNetUnfolderBase]: 3623/5825 cut-off events. [2024-06-28 03:01:38,793 INFO L125 PetriNetUnfolderBase]: For 1127207/1127207 co-relation queries the response was YES. [2024-06-28 03:01:38,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57856 conditions, 5825 events. 3623/5825 cut-off events. For 1127207/1127207 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 35649 event pairs, 769 based on Foata normal form. 2/5821 useless extension candidates. Maximal degree in co-relation 57702. Up to 5342 conditions per place. [2024-06-28 03:01:38,879 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 363 selfloop transitions, 56 changer transitions 0/424 dead transitions. [2024-06-28 03:01:38,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 424 transitions, 5324 flow [2024-06-28 03:01:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 03:01:38,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-28 03:01:38,880 INFO L175 Difference]: Start difference. First operand has 312 places, 400 transitions, 4290 flow. Second operand 8 states and 154 transitions. [2024-06-28 03:01:38,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 424 transitions, 5324 flow [2024-06-28 03:01:41,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 424 transitions, 5113 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:41,824 INFO L231 Difference]: Finished difference. Result has 314 places, 404 transitions, 4338 flow [2024-06-28 03:01:41,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4338, PETRI_PLACES=314, PETRI_TRANSITIONS=404} [2024-06-28 03:01:41,824 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-28 03:01:41,824 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 404 transitions, 4338 flow [2024-06-28 03:01:41,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-28 03:01:41,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:41,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:41,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 03:01:41,825 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:41,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash -522104665, now seen corresponding path program 1 times [2024-06-28 03:01:41,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:41,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897670075] [2024-06-28 03:01:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:41,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:42,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:42,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897670075] [2024-06-28 03:01:42,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897670075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:42,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:42,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:01:42,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730144246] [2024-06-28 03:01:42,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:42,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:01:42,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:42,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:01:42,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:01:42,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:01:42,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 404 transitions, 4338 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:42,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:42,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:01:42,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:44,084 INFO L124 PetriNetUnfolderBase]: 3469/5634 cut-off events. [2024-06-28 03:01:44,084 INFO L125 PetriNetUnfolderBase]: For 1149740/1149743 co-relation queries the response was YES. [2024-06-28 03:01:44,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57401 conditions, 5634 events. 3469/5634 cut-off events. For 1149740/1149743 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35070 event pairs, 728 based on Foata normal form. 4/5585 useless extension candidates. Maximal degree in co-relation 57246. Up to 5089 conditions per place. [2024-06-28 03:01:44,167 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 351 selfloop transitions, 40 changer transitions 0/427 dead transitions. [2024-06-28 03:01:44,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 427 transitions, 5258 flow [2024-06-28 03:01:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:01:44,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-28 03:01:44,168 INFO L175 Difference]: Start difference. First operand has 314 places, 404 transitions, 4338 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:01:44,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 427 transitions, 5258 flow [2024-06-28 03:01:46,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 427 transitions, 5027 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:46,583 INFO L231 Difference]: Finished difference. Result has 316 places, 408 transitions, 4280 flow [2024-06-28 03:01:46,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4280, PETRI_PLACES=316, PETRI_TRANSITIONS=408} [2024-06-28 03:01:46,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-28 03:01:46,584 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 408 transitions, 4280 flow [2024-06-28 03:01:46,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:46,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:46,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:46,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 03:01:46,584 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:46,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:46,584 INFO L85 PathProgramCache]: Analyzing trace with hash -285929305, now seen corresponding path program 2 times [2024-06-28 03:01:46,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:46,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95048291] [2024-06-28 03:01:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:46,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:47,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:47,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95048291] [2024-06-28 03:01:47,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95048291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:47,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:47,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:01:47,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131031839] [2024-06-28 03:01:47,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:47,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:01:47,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:01:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:01:47,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:01:47,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 408 transitions, 4280 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:47,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:47,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:01:47,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:48,959 INFO L124 PetriNetUnfolderBase]: 3479/5648 cut-off events. [2024-06-28 03:01:48,960 INFO L125 PetriNetUnfolderBase]: For 1169208/1169211 co-relation queries the response was YES. [2024-06-28 03:01:49,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57556 conditions, 5648 events. 3479/5648 cut-off events. For 1169208/1169211 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35121 event pairs, 728 based on Foata normal form. 4/5599 useless extension candidates. Maximal degree in co-relation 57400. Up to 5066 conditions per place. [2024-06-28 03:01:49,041 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 339 selfloop transitions, 53 changer transitions 0/428 dead transitions. [2024-06-28 03:01:49,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 428 transitions, 5198 flow [2024-06-28 03:01:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:01:49,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-28 03:01:49,043 INFO L175 Difference]: Start difference. First operand has 316 places, 408 transitions, 4280 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:01:49,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 428 transitions, 5198 flow [2024-06-28 03:01:51,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 428 transitions, 5075 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:51,675 INFO L231 Difference]: Finished difference. Result has 318 places, 412 transitions, 4364 flow [2024-06-28 03:01:51,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4157, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4364, PETRI_PLACES=318, PETRI_TRANSITIONS=412} [2024-06-28 03:01:51,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-28 03:01:51,675 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 412 transitions, 4364 flow [2024-06-28 03:01:51,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:51,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:51,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:51,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 03:01:51,675 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:51,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:51,676 INFO L85 PathProgramCache]: Analyzing trace with hash -285929553, now seen corresponding path program 3 times [2024-06-28 03:01:51,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:51,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295820074] [2024-06-28 03:01:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:51,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:52,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:52,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295820074] [2024-06-28 03:01:52,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295820074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:52,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:52,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:01:52,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604688999] [2024-06-28 03:01:52,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:52,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:01:52,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:52,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:01:52,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:01:52,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:01:52,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 412 transitions, 4364 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:52,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:52,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:01:52,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:53,825 INFO L124 PetriNetUnfolderBase]: 3669/5891 cut-off events. [2024-06-28 03:01:53,826 INFO L125 PetriNetUnfolderBase]: For 1206313/1206313 co-relation queries the response was YES. [2024-06-28 03:01:53,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59665 conditions, 5891 events. 3669/5891 cut-off events. For 1206313/1206313 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 36133 event pairs, 768 based on Foata normal form. 2/5887 useless extension candidates. Maximal degree in co-relation 59508. Up to 5332 conditions per place. [2024-06-28 03:01:53,908 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 364 selfloop transitions, 68 changer transitions 0/437 dead transitions. [2024-06-28 03:01:53,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 437 transitions, 5770 flow [2024-06-28 03:01:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:01:53,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:01:53,909 INFO L175 Difference]: Start difference. First operand has 318 places, 412 transitions, 4364 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:01:53,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 437 transitions, 5770 flow [2024-06-28 03:01:57,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 437 transitions, 5613 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:57,049 INFO L231 Difference]: Finished difference. Result has 320 places, 419 transitions, 4590 flow [2024-06-28 03:01:57,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4590, PETRI_PLACES=320, PETRI_TRANSITIONS=419} [2024-06-28 03:01:57,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-28 03:01:57,049 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 419 transitions, 4590 flow [2024-06-28 03:01:57,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:57,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:57,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:57,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 03:01:57,050 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:57,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash -285632635, now seen corresponding path program 3 times [2024-06-28 03:01:57,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:57,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659197069] [2024-06-28 03:01:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:57,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:58,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:58,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659197069] [2024-06-28 03:01:58,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659197069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:58,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:58,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:01:58,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560837727] [2024-06-28 03:01:58,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:58,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:01:58,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:58,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:01:58,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:01:58,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:01:58,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 419 transitions, 4590 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:58,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:58,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:01:58,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:59,414 INFO L124 PetriNetUnfolderBase]: 3507/5689 cut-off events. [2024-06-28 03:01:59,414 INFO L125 PetriNetUnfolderBase]: For 1224309/1224312 co-relation queries the response was YES. [2024-06-28 03:01:59,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59110 conditions, 5689 events. 3507/5689 cut-off events. For 1224309/1224312 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35399 event pairs, 729 based on Foata normal form. 4/5640 useless extension candidates. Maximal degree in co-relation 58952. Up to 5045 conditions per place. [2024-06-28 03:01:59,501 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 330 selfloop transitions, 71 changer transitions 0/439 dead transitions. [2024-06-28 03:01:59,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 439 transitions, 5732 flow [2024-06-28 03:01:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:01:59,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-28 03:01:59,502 INFO L175 Difference]: Start difference. First operand has 320 places, 419 transitions, 4590 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:01:59,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 439 transitions, 5732 flow [2024-06-28 03:02:02,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 439 transitions, 5538 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-28 03:02:02,307 INFO L231 Difference]: Finished difference. Result has 324 places, 422 transitions, 4626 flow [2024-06-28 03:02:02,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4626, PETRI_PLACES=324, PETRI_TRANSITIONS=422} [2024-06-28 03:02:02,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-28 03:02:02,308 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 422 transitions, 4626 flow [2024-06-28 03:02:02,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:02,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:02,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:02,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 03:02:02,308 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:02,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:02,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1585472246, now seen corresponding path program 1 times [2024-06-28 03:02:02,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:02,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236813128] [2024-06-28 03:02:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:02,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:03,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:03,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236813128] [2024-06-28 03:02:03,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236813128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:03,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:03,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:02:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053839737] [2024-06-28 03:02:03,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:03,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:02:03,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:03,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:02:03,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:02:03,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:02:03,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 422 transitions, 4626 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-28 03:02:03,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:03,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:02:03,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:05,185 INFO L124 PetriNetUnfolderBase]: 3835/6198 cut-off events. [2024-06-28 03:02:05,185 INFO L125 PetriNetUnfolderBase]: For 1284334/1284334 co-relation queries the response was YES. [2024-06-28 03:02:05,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61954 conditions, 6198 events. 3835/6198 cut-off events. For 1284334/1284334 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 38764 event pairs, 725 based on Foata normal form. 12/6204 useless extension candidates. Maximal degree in co-relation 61794. Up to 4977 conditions per place. [2024-06-28 03:02:05,276 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 371 selfloop transitions, 98 changer transitions 0/474 dead transitions. [2024-06-28 03:02:05,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 474 transitions, 5886 flow [2024-06-28 03:02:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:02:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:02:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-28 03:02:05,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-28 03:02:05,277 INFO L175 Difference]: Start difference. First operand has 324 places, 422 transitions, 4626 flow. Second operand 10 states and 201 transitions. [2024-06-28 03:02:05,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 474 transitions, 5886 flow [2024-06-28 03:02:08,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 474 transitions, 5718 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 03:02:08,168 INFO L231 Difference]: Finished difference. Result has 331 places, 433 transitions, 4845 flow [2024-06-28 03:02:08,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4845, PETRI_PLACES=331, PETRI_TRANSITIONS=433} [2024-06-28 03:02:08,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-28 03:02:08,169 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 433 transitions, 4845 flow [2024-06-28 03:02:08,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-28 03:02:08,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:08,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:08,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 03:02:08,169 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:08,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1419608723, now seen corresponding path program 3 times [2024-06-28 03:02:08,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:08,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721908579] [2024-06-28 03:02:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:08,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:09,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:09,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721908579] [2024-06-28 03:02:09,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721908579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:09,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:09,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:02:09,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864521557] [2024-06-28 03:02:09,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:09,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:02:09,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:09,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:02:09,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:02:09,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:02:09,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 433 transitions, 4845 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-28 03:02:09,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:09,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:02:09,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:10,640 INFO L124 PetriNetUnfolderBase]: 3687/6037 cut-off events. [2024-06-28 03:02:10,640 INFO L125 PetriNetUnfolderBase]: For 1287545/1287548 co-relation queries the response was YES. [2024-06-28 03:02:10,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62058 conditions, 6037 events. 3687/6037 cut-off events. For 1287545/1287548 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38551 event pairs, 769 based on Foata normal form. 6/5990 useless extension candidates. Maximal degree in co-relation 61895. Up to 5397 conditions per place. [2024-06-28 03:02:10,730 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 361 selfloop transitions, 54 changer transitions 0/453 dead transitions. [2024-06-28 03:02:10,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 453 transitions, 5855 flow [2024-06-28 03:02:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:02:10,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:02:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:02:10,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-28 03:02:10,731 INFO L175 Difference]: Start difference. First operand has 331 places, 433 transitions, 4845 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:02:10,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 453 transitions, 5855 flow [2024-06-28 03:02:14,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 453 transitions, 5657 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-28 03:02:14,081 INFO L231 Difference]: Finished difference. Result has 331 places, 436 transitions, 4897 flow [2024-06-28 03:02:14,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4647, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4897, PETRI_PLACES=331, PETRI_TRANSITIONS=436} [2024-06-28 03:02:14,081 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-28 03:02:14,081 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 436 transitions, 4897 flow [2024-06-28 03:02:14,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-28 03:02:14,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:14,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:14,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 03:02:14,081 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:14,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash 151934263, now seen corresponding path program 2 times [2024-06-28 03:02:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580879594] [2024-06-28 03:02:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:14,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:15,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:15,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580879594] [2024-06-28 03:02:15,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580879594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:15,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:15,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:02:15,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346170328] [2024-06-28 03:02:15,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:15,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:02:15,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:02:15,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:02:15,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:02:15,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 436 transitions, 4897 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:02:15,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:15,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:02:15,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:16,731 INFO L124 PetriNetUnfolderBase]: 3743/6117 cut-off events. [2024-06-28 03:02:16,731 INFO L125 PetriNetUnfolderBase]: For 1322575/1322578 co-relation queries the response was YES. [2024-06-28 03:02:16,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63510 conditions, 6117 events. 3743/6117 cut-off events. For 1322575/1322578 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 38944 event pairs, 764 based on Foata normal form. 4/6068 useless extension candidates. Maximal degree in co-relation 63349. Up to 5363 conditions per place. [2024-06-28 03:02:16,822 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 355 selfloop transitions, 80 changer transitions 0/473 dead transitions. [2024-06-28 03:02:16,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 473 transitions, 6703 flow [2024-06-28 03:02:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:02:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:02:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 03:02:16,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-28 03:02:16,823 INFO L175 Difference]: Start difference. First operand has 331 places, 436 transitions, 4897 flow. Second operand 9 states and 176 transitions. [2024-06-28 03:02:16,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 473 transitions, 6703 flow [2024-06-28 03:02:20,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 473 transitions, 6475 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-28 03:02:20,227 INFO L231 Difference]: Finished difference. Result has 336 places, 451 transitions, 5278 flow [2024-06-28 03:02:20,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5278, PETRI_PLACES=336, PETRI_TRANSITIONS=451} [2024-06-28 03:02:20,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-28 03:02:20,227 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 451 transitions, 5278 flow [2024-06-28 03:02:20,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:02:20,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:20,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:20,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 03:02:20,228 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:20,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:20,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1076104991, now seen corresponding path program 3 times [2024-06-28 03:02:20,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:20,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730577115] [2024-06-28 03:02:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:20,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:21,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:21,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730577115] [2024-06-28 03:02:21,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730577115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:21,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:21,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:02:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966205971] [2024-06-28 03:02:21,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:21,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:02:21,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:21,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:02:21,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:02:21,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:02:21,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 451 transitions, 5278 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:02:21,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:21,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:02:21,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:22,869 INFO L124 PetriNetUnfolderBase]: 3771/6162 cut-off events. [2024-06-28 03:02:22,869 INFO L125 PetriNetUnfolderBase]: For 1378577/1378580 co-relation queries the response was YES. [2024-06-28 03:02:22,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65075 conditions, 6162 events. 3771/6162 cut-off events. For 1378577/1378580 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39370 event pairs, 769 based on Foata normal form. 6/6115 useless extension candidates. Maximal degree in co-relation 64911. Up to 5361 conditions per place. [2024-06-28 03:02:22,967 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 351 selfloop transitions, 90 changer transitions 0/479 dead transitions. [2024-06-28 03:02:22,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 479 transitions, 7026 flow [2024-06-28 03:02:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:02:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:02:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:02:22,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-28 03:02:22,968 INFO L175 Difference]: Start difference. First operand has 336 places, 451 transitions, 5278 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:02:22,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 479 transitions, 7026 flow [2024-06-28 03:02:27,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 479 transitions, 6711 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-06-28 03:02:27,577 INFO L231 Difference]: Finished difference. Result has 342 places, 459 transitions, 5499 flow [2024-06-28 03:02:27,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4965, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5499, PETRI_PLACES=342, PETRI_TRANSITIONS=459} [2024-06-28 03:02:27,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-28 03:02:27,578 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 459 transitions, 5499 flow [2024-06-28 03:02:27,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:02:27,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:27,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:27,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 03:02:27,578 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:27,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:27,579 INFO L85 PathProgramCache]: Analyzing trace with hash -286039789, now seen corresponding path program 4 times [2024-06-28 03:02:27,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:27,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541335564] [2024-06-28 03:02:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:27,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:28,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:28,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541335564] [2024-06-28 03:02:28,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541335564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:28,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:28,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:02:28,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310017725] [2024-06-28 03:02:28,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:28,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:02:28,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:28,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:02:28,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:02:28,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:02:28,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 459 transitions, 5499 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:02:28,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:28,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:02:28,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:30,375 INFO L124 PetriNetUnfolderBase]: 3783/6181 cut-off events. [2024-06-28 03:02:30,375 INFO L125 PetriNetUnfolderBase]: For 1402198/1402201 co-relation queries the response was YES. [2024-06-28 03:02:30,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65862 conditions, 6181 events. 3783/6181 cut-off events. For 1402198/1402201 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39539 event pairs, 773 based on Foata normal form. 6/6134 useless extension candidates. Maximal degree in co-relation 65695. Up to 5525 conditions per place. [2024-06-28 03:02:30,474 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 384 selfloop transitions, 61 changer transitions 0/483 dead transitions. [2024-06-28 03:02:30,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 483 transitions, 6671 flow [2024-06-28 03:02:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:02:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:02:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 03:02:30,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:02:30,475 INFO L175 Difference]: Start difference. First operand has 342 places, 459 transitions, 5499 flow. Second operand 9 states and 172 transitions. [2024-06-28 03:02:30,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 483 transitions, 6671 flow [2024-06-28 03:02:34,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 483 transitions, 6345 flow, removed 105 selfloop flow, removed 6 redundant places. [2024-06-28 03:02:34,058 INFO L231 Difference]: Finished difference. Result has 345 places, 465 transitions, 5543 flow [2024-06-28 03:02:34,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5197, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5543, PETRI_PLACES=345, PETRI_TRANSITIONS=465} [2024-06-28 03:02:34,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-28 03:02:34,058 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 465 transitions, 5543 flow [2024-06-28 03:02:34,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:02:34,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:34,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:34,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 03:02:34,059 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:34,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:34,059 INFO L85 PathProgramCache]: Analyzing trace with hash 532901547, now seen corresponding path program 4 times [2024-06-28 03:02:34,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:34,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911917707] [2024-06-28 03:02:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:34,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:34,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:34,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911917707] [2024-06-28 03:02:34,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911917707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:34,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:34,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:02:34,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595869485] [2024-06-28 03:02:34,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:34,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:02:34,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:34,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:02:34,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:02:34,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:02:34,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 465 transitions, 5543 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:34,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:34,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:02:34,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:36,399 INFO L124 PetriNetUnfolderBase]: 3952/6384 cut-off events. [2024-06-28 03:02:36,399 INFO L125 PetriNetUnfolderBase]: For 1408325/1408325 co-relation queries the response was YES. [2024-06-28 03:02:36,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67175 conditions, 6384 events. 3952/6384 cut-off events. For 1408325/1408325 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40198 event pairs, 835 based on Foata normal form. 1/6375 useless extension candidates. Maximal degree in co-relation 67007. Up to 5877 conditions per place. [2024-06-28 03:02:36,497 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 425 selfloop transitions, 56 changer transitions 0/486 dead transitions. [2024-06-28 03:02:36,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 486 transitions, 6677 flow [2024-06-28 03:02:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:02:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:02:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:02:36,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:02:36,498 INFO L175 Difference]: Start difference. First operand has 345 places, 465 transitions, 5543 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:02:36,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 486 transitions, 6677 flow [2024-06-28 03:02:39,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 486 transitions, 6396 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-28 03:02:39,471 INFO L231 Difference]: Finished difference. Result has 346 places, 468 transitions, 5506 flow [2024-06-28 03:02:39,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5262, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5506, PETRI_PLACES=346, PETRI_TRANSITIONS=468} [2024-06-28 03:02:39,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-28 03:02:39,472 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 468 transitions, 5506 flow [2024-06-28 03:02:39,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:39,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:39,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:39,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 03:02:39,472 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:39,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:39,472 INFO L85 PathProgramCache]: Analyzing trace with hash 613013261, now seen corresponding path program 5 times [2024-06-28 03:02:39,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:39,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818616169] [2024-06-28 03:02:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:39,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:40,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:40,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818616169] [2024-06-28 03:02:40,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818616169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:40,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:40,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:02:40,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181893714] [2024-06-28 03:02:40,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:40,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:02:40,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:40,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:02:40,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:02:40,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:02:40,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 468 transitions, 5506 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:40,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:40,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:02:40,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:41,868 INFO L124 PetriNetUnfolderBase]: 3965/6402 cut-off events. [2024-06-28 03:02:41,868 INFO L125 PetriNetUnfolderBase]: For 1439256/1439256 co-relation queries the response was YES. [2024-06-28 03:02:41,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67712 conditions, 6402 events. 3965/6402 cut-off events. For 1439256/1439256 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40242 event pairs, 834 based on Foata normal form. 1/6393 useless extension candidates. Maximal degree in co-relation 67543. Up to 5879 conditions per place. [2024-06-28 03:02:41,971 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 417 selfloop transitions, 68 changer transitions 0/490 dead transitions. [2024-06-28 03:02:41,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 490 transitions, 7002 flow [2024-06-28 03:02:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:02:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:02:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:02:41,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:02:41,972 INFO L175 Difference]: Start difference. First operand has 346 places, 468 transitions, 5506 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:02:41,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 490 transitions, 7002 flow [2024-06-28 03:02:45,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 490 transitions, 6784 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-28 03:02:45,453 INFO L231 Difference]: Finished difference. Result has 349 places, 474 transitions, 5711 flow [2024-06-28 03:02:45,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5288, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5711, PETRI_PLACES=349, PETRI_TRANSITIONS=474} [2024-06-28 03:02:45,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-28 03:02:45,453 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 474 transitions, 5711 flow [2024-06-28 03:02:45,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:45,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:45,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:45,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 03:02:45,454 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:45,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:45,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2097585523, now seen corresponding path program 6 times [2024-06-28 03:02:45,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:45,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633767259] [2024-06-28 03:02:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:45,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:46,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633767259] [2024-06-28 03:02:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633767259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:46,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:46,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:02:46,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469551580] [2024-06-28 03:02:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:02:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:02:46,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:02:46,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:02:46,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 474 transitions, 5711 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-28 03:02:46,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:46,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:02:46,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:47,896 INFO L124 PetriNetUnfolderBase]: 3962/6398 cut-off events. [2024-06-28 03:02:47,896 INFO L125 PetriNetUnfolderBase]: For 1456951/1456951 co-relation queries the response was YES. [2024-06-28 03:02:47,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67980 conditions, 6398 events. 3962/6398 cut-off events. For 1456951/1456951 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40248 event pairs, 832 based on Foata normal form. 1/6389 useless extension candidates. Maximal degree in co-relation 67809. Up to 5891 conditions per place. [2024-06-28 03:02:47,992 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 435 selfloop transitions, 54 changer transitions 0/494 dead transitions. [2024-06-28 03:02:47,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 494 transitions, 6751 flow [2024-06-28 03:02:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:02:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:02:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:02:47,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:02:47,993 INFO L175 Difference]: Start difference. First operand has 349 places, 474 transitions, 5711 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:02:47,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 494 transitions, 6751 flow [2024-06-28 03:02:51,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 494 transitions, 6458 flow, removed 111 selfloop flow, removed 4 redundant places. [2024-06-28 03:02:51,637 INFO L231 Difference]: Finished difference. Result has 353 places, 474 transitions, 5532 flow [2024-06-28 03:02:51,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5418, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5532, PETRI_PLACES=353, PETRI_TRANSITIONS=474} [2024-06-28 03:02:51,637 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-28 03:02:51,637 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 474 transitions, 5532 flow [2024-06-28 03:02:51,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-28 03:02:51,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:51,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:51,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 03:02:51,638 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:51,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:51,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1762106237, now seen corresponding path program 4 times [2024-06-28 03:02:51,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:51,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187006868] [2024-06-28 03:02:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:51,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:52,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:52,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187006868] [2024-06-28 03:02:52,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187006868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:52,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:52,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:02:52,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624182850] [2024-06-28 03:02:52,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:52,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:02:52,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:52,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:02:52,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:02:52,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:02:52,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 474 transitions, 5532 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:52,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:52,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:02:52,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:54,138 INFO L124 PetriNetUnfolderBase]: 3791/6187 cut-off events. [2024-06-28 03:02:54,139 INFO L125 PetriNetUnfolderBase]: For 1469613/1469613 co-relation queries the response was YES. [2024-06-28 03:02:54,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66674 conditions, 6187 events. 3791/6187 cut-off events. For 1469613/1469613 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39510 event pairs, 785 based on Foata normal form. 1/6133 useless extension candidates. Maximal degree in co-relation 66501. Up to 5582 conditions per place. [2024-06-28 03:02:54,239 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 405 selfloop transitions, 43 changer transitions 0/489 dead transitions. [2024-06-28 03:02:54,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 489 transitions, 6472 flow [2024-06-28 03:02:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:02:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:02:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 03:02:54,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-28 03:02:54,242 INFO L175 Difference]: Start difference. First operand has 353 places, 474 transitions, 5532 flow. Second operand 8 states and 153 transitions. [2024-06-28 03:02:54,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 489 transitions, 6472 flow [2024-06-28 03:02:57,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 489 transitions, 6309 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 03:02:57,411 INFO L231 Difference]: Finished difference. Result has 354 places, 474 transitions, 5462 flow [2024-06-28 03:02:57,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5462, PETRI_PLACES=354, PETRI_TRANSITIONS=474} [2024-06-28 03:02:57,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-28 03:02:57,411 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 474 transitions, 5462 flow [2024-06-28 03:02:57,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:57,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:57,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:57,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 03:02:57,412 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:57,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:57,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1762105989, now seen corresponding path program 7 times [2024-06-28 03:02:57,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:57,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762807680] [2024-06-28 03:02:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:57,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:58,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:58,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762807680] [2024-06-28 03:02:58,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762807680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:58,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:58,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:02:58,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817202664] [2024-06-28 03:02:58,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:58,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:02:58,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:58,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:02:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:02:58,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:02:58,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 474 transitions, 5462 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-28 03:02:58,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:58,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:02:58,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:59,870 INFO L124 PetriNetUnfolderBase]: 3952/6383 cut-off events. [2024-06-28 03:02:59,870 INFO L125 PetriNetUnfolderBase]: For 1489693/1489693 co-relation queries the response was YES. [2024-06-28 03:02:59,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67808 conditions, 6383 events. 3952/6383 cut-off events. For 1489693/1489693 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40107 event pairs, 832 based on Foata normal form. 1/6374 useless extension candidates. Maximal degree in co-relation 67634. Up to 5861 conditions per place. [2024-06-28 03:02:59,966 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 426 selfloop transitions, 63 changer transitions 0/494 dead transitions. [2024-06-28 03:02:59,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 494 transitions, 6624 flow [2024-06-28 03:02:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:02:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:02:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:02:59,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 03:02:59,967 INFO L175 Difference]: Start difference. First operand has 354 places, 474 transitions, 5462 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:02:59,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 494 transitions, 6624 flow [2024-06-28 03:03:04,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 494 transitions, 6452 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-28 03:03:04,121 INFO L231 Difference]: Finished difference. Result has 354 places, 477 transitions, 5561 flow [2024-06-28 03:03:04,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5561, PETRI_PLACES=354, PETRI_TRANSITIONS=477} [2024-06-28 03:03:04,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-28 03:03:04,121 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 477 transitions, 5561 flow [2024-06-28 03:03:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-28 03:03:04,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:04,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:04,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 03:03:04,121 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:04,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2119078949, now seen corresponding path program 5 times [2024-06-28 03:03:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:04,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768668455] [2024-06-28 03:03:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:05,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:05,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768668455] [2024-06-28 03:03:05,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768668455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:05,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:05,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:03:05,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759142174] [2024-06-28 03:03:05,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:05,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:03:05,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:05,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:03:05,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:03:05,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:03:05,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 477 transitions, 5561 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:05,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:05,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:03:05,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:06,648 INFO L124 PetriNetUnfolderBase]: 3801/6211 cut-off events. [2024-06-28 03:03:06,648 INFO L125 PetriNetUnfolderBase]: For 1519402/1519402 co-relation queries the response was YES. [2024-06-28 03:03:06,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67258 conditions, 6211 events. 3801/6211 cut-off events. For 1519402/1519402 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39783 event pairs, 785 based on Foata normal form. 1/6157 useless extension candidates. Maximal degree in co-relation 67083. Up to 5563 conditions per place. [2024-06-28 03:03:06,745 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 392 selfloop transitions, 63 changer transitions 0/497 dead transitions. [2024-06-28 03:03:06,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 497 transitions, 6902 flow [2024-06-28 03:03:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:03:06,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-28 03:03:06,746 INFO L175 Difference]: Start difference. First operand has 354 places, 477 transitions, 5561 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:03:06,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 497 transitions, 6902 flow [2024-06-28 03:03:11,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 497 transitions, 6659 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-28 03:03:11,354 INFO L231 Difference]: Finished difference. Result has 357 places, 484 transitions, 5643 flow [2024-06-28 03:03:11,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5318, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5643, PETRI_PLACES=357, PETRI_TRANSITIONS=484} [2024-06-28 03:03:11,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-28 03:03:11,355 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 484 transitions, 5643 flow [2024-06-28 03:03:11,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:11,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:11,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:11,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 03:03:11,355 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:11,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2119547917, now seen corresponding path program 8 times [2024-06-28 03:03:11,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:11,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001686253] [2024-06-28 03:03:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:11,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:12,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:12,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001686253] [2024-06-28 03:03:12,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001686253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:12,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:12,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:03:12,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938961703] [2024-06-28 03:03:12,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:12,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:03:12,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:12,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:03:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:03:12,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:03:12,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 484 transitions, 5643 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-28 03:03:12,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:12,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:03:12,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:13,828 INFO L124 PetriNetUnfolderBase]: 3978/6419 cut-off events. [2024-06-28 03:03:13,828 INFO L125 PetriNetUnfolderBase]: For 1555738/1555738 co-relation queries the response was YES. [2024-06-28 03:03:13,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69083 conditions, 6419 events. 3978/6419 cut-off events. For 1555738/1555738 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40368 event pairs, 835 based on Foata normal form. 1/6410 useless extension candidates. Maximal degree in co-relation 68906. Up to 5851 conditions per place. [2024-06-28 03:03:13,928 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 408 selfloop transitions, 91 changer transitions 0/504 dead transitions. [2024-06-28 03:03:13,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 504 transitions, 7189 flow [2024-06-28 03:03:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:03:13,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-28 03:03:13,929 INFO L175 Difference]: Start difference. First operand has 357 places, 484 transitions, 5643 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:03:13,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 504 transitions, 7189 flow [2024-06-28 03:03:18,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 504 transitions, 7023 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 03:03:18,827 INFO L231 Difference]: Finished difference. Result has 360 places, 490 transitions, 5943 flow [2024-06-28 03:03:18,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5477, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5943, PETRI_PLACES=360, PETRI_TRANSITIONS=490} [2024-06-28 03:03:18,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-28 03:03:18,827 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 490 transitions, 5943 flow [2024-06-28 03:03:18,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-28 03:03:18,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:18,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:18,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 03:03:18,828 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:18,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:18,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1817849311, now seen corresponding path program 6 times [2024-06-28 03:03:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:18,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667126037] [2024-06-28 03:03:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:18,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:19,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:19,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667126037] [2024-06-28 03:03:19,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667126037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:19,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:19,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:03:19,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693278825] [2024-06-28 03:03:19,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:19,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:03:19,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:19,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:03:19,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:03:19,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:03:19,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 490 transitions, 5943 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:19,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:19,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:03:19,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:21,356 INFO L124 PetriNetUnfolderBase]: 3813/6227 cut-off events. [2024-06-28 03:03:21,356 INFO L125 PetriNetUnfolderBase]: For 1573219/1573219 co-relation queries the response was YES. [2024-06-28 03:03:21,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68214 conditions, 6227 events. 3813/6227 cut-off events. For 1573219/1573219 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39881 event pairs, 787 based on Foata normal form. 1/6173 useless extension candidates. Maximal degree in co-relation 68036. Up to 5590 conditions per place. [2024-06-28 03:03:21,454 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 407 selfloop transitions, 51 changer transitions 0/502 dead transitions. [2024-06-28 03:03:21,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 502 transitions, 6891 flow [2024-06-28 03:03:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:03:21,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:03:21,455 INFO L175 Difference]: Start difference. First operand has 360 places, 490 transitions, 5943 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:03:21,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 502 transitions, 6891 flow [2024-06-28 03:03:24,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 502 transitions, 6543 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-28 03:03:24,757 INFO L231 Difference]: Finished difference. Result has 363 places, 490 transitions, 5703 flow [2024-06-28 03:03:24,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5595, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5703, PETRI_PLACES=363, PETRI_TRANSITIONS=490} [2024-06-28 03:03:24,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-28 03:03:24,758 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 490 transitions, 5703 flow [2024-06-28 03:03:24,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:24,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:24,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:24,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 03:03:24,758 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:24,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1684099153, now seen corresponding path program 9 times [2024-06-28 03:03:24,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:24,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016947933] [2024-06-28 03:03:24,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:24,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:25,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:25,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016947933] [2024-06-28 03:03:25,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016947933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:25,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:25,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:03:25,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208138555] [2024-06-28 03:03:25,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:25,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:03:25,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:03:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:03:25,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:03:25,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 490 transitions, 5703 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:25,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:25,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:03:25,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:27,247 INFO L124 PetriNetUnfolderBase]: 3972/6411 cut-off events. [2024-06-28 03:03:27,247 INFO L125 PetriNetUnfolderBase]: For 1589789/1589789 co-relation queries the response was YES. [2024-06-28 03:03:27,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69087 conditions, 6411 events. 3972/6411 cut-off events. For 1589789/1589789 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40360 event pairs, 834 based on Foata normal form. 1/6402 useless extension candidates. Maximal degree in co-relation 68908. Up to 5844 conditions per place. [2024-06-28 03:03:27,349 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 409 selfloop transitions, 89 changer transitions 0/503 dead transitions. [2024-06-28 03:03:27,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 503 transitions, 6735 flow [2024-06-28 03:03:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:03:27,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-28 03:03:27,350 INFO L175 Difference]: Start difference. First operand has 363 places, 490 transitions, 5703 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:03:27,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 503 transitions, 6735 flow [2024-06-28 03:03:31,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 503 transitions, 6545 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 03:03:31,630 INFO L231 Difference]: Finished difference. Result has 365 places, 490 transitions, 5697 flow [2024-06-28 03:03:31,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5513, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5697, PETRI_PLACES=365, PETRI_TRANSITIONS=490} [2024-06-28 03:03:31,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-28 03:03:31,631 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 490 transitions, 5697 flow [2024-06-28 03:03:31,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:31,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:31,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:31,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 03:03:31,631 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:31,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1765287813, now seen corresponding path program 7 times [2024-06-28 03:03:31,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:31,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146248064] [2024-06-28 03:03:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:32,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:32,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146248064] [2024-06-28 03:03:32,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146248064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:32,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:32,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:03:32,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297501387] [2024-06-28 03:03:32,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:32,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:03:32,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:32,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:03:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:03:32,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:03:32,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 490 transitions, 5697 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:32,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:32,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:03:32,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:34,246 INFO L124 PetriNetUnfolderBase]: 3820/6240 cut-off events. [2024-06-28 03:03:34,246 INFO L125 PetriNetUnfolderBase]: For 1617166/1617169 co-relation queries the response was YES. [2024-06-28 03:03:34,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68260 conditions, 6240 events. 3820/6240 cut-off events. For 1617166/1617169 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39970 event pairs, 799 based on Foata normal form. 4/6184 useless extension candidates. Maximal degree in co-relation 68080. Up to 5506 conditions per place. [2024-06-28 03:03:34,346 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 382 selfloop transitions, 79 changer transitions 0/505 dead transitions. [2024-06-28 03:03:34,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 505 transitions, 6983 flow [2024-06-28 03:03:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 03:03:34,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-28 03:03:34,347 INFO L175 Difference]: Start difference. First operand has 365 places, 490 transitions, 5697 flow. Second operand 8 states and 154 transitions. [2024-06-28 03:03:34,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 505 transitions, 6983 flow [2024-06-28 03:03:39,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 505 transitions, 6775 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 03:03:39,339 INFO L231 Difference]: Finished difference. Result has 366 places, 494 transitions, 5750 flow [2024-06-28 03:03:39,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5750, PETRI_PLACES=366, PETRI_TRANSITIONS=494} [2024-06-28 03:03:39,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-28 03:03:39,340 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 494 transitions, 5750 flow [2024-06-28 03:03:39,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:39,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:39,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:39,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 03:03:39,340 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:39,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1764990895, now seen corresponding path program 10 times [2024-06-28 03:03:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:39,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604347032] [2024-06-28 03:03:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:40,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:40,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604347032] [2024-06-28 03:03:40,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604347032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:40,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:40,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:03:40,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49323314] [2024-06-28 03:03:40,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:40,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:03:40,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:40,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:03:40,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:03:40,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:03:40,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 494 transitions, 5750 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:40,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:40,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:03:40,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:41,836 INFO L124 PetriNetUnfolderBase]: 3992/6448 cut-off events. [2024-06-28 03:03:41,836 INFO L125 PetriNetUnfolderBase]: For 1648574/1648574 co-relation queries the response was YES. [2024-06-28 03:03:41,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69933 conditions, 6448 events. 3992/6448 cut-off events. For 1648574/1648574 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40618 event pairs, 866 based on Foata normal form. 2/6436 useless extension candidates. Maximal degree in co-relation 69752. Up to 5755 conditions per place. [2024-06-28 03:03:41,943 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 407 selfloop transitions, 102 changer transitions 0/514 dead transitions. [2024-06-28 03:03:41,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 514 transitions, 7630 flow [2024-06-28 03:03:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:03:41,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 03:03:41,944 INFO L175 Difference]: Start difference. First operand has 366 places, 494 transitions, 5750 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:03:41,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 514 transitions, 7630 flow [2024-06-28 03:03:48,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 514 transitions, 7438 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 03:03:48,089 INFO L231 Difference]: Finished difference. Result has 369 places, 501 transitions, 6059 flow [2024-06-28 03:03:48,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5558, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6059, PETRI_PLACES=369, PETRI_TRANSITIONS=501} [2024-06-28 03:03:48,090 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-28 03:03:48,090 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 501 transitions, 6059 flow [2024-06-28 03:03:48,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:48,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:48,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:48,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 03:03:48,090 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:48,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:48,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1175365159, now seen corresponding path program 11 times [2024-06-28 03:03:48,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:48,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373139308] [2024-06-28 03:03:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:48,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:48,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:48,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373139308] [2024-06-28 03:03:48,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373139308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:48,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:48,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:03:48,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881582988] [2024-06-28 03:03:48,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:48,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:03:48,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:48,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:03:48,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:03:49,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:03:49,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 501 transitions, 6059 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:49,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:49,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:03:49,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:50,650 INFO L124 PetriNetUnfolderBase]: 3997/6455 cut-off events. [2024-06-28 03:03:50,650 INFO L125 PetriNetUnfolderBase]: For 1674441/1674441 co-relation queries the response was YES. [2024-06-28 03:03:50,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70777 conditions, 6455 events. 3997/6455 cut-off events. For 1674441/1674441 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40619 event pairs, 866 based on Foata normal form. 1/6442 useless extension candidates. Maximal degree in co-relation 70595. Up to 5759 conditions per place. [2024-06-28 03:03:50,744 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 401 selfloop transitions, 113 changer transitions 0/519 dead transitions. [2024-06-28 03:03:50,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 519 transitions, 7905 flow [2024-06-28 03:03:50,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:03:50,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-28 03:03:50,745 INFO L175 Difference]: Start difference. First operand has 369 places, 501 transitions, 6059 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:03:50,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 519 transitions, 7905 flow [2024-06-28 03:03:55,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 519 transitions, 7550 flow, removed 102 selfloop flow, removed 5 redundant places. [2024-06-28 03:03:55,700 INFO L231 Difference]: Finished difference. Result has 372 places, 507 transitions, 6230 flow [2024-06-28 03:03:55,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5720, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6230, PETRI_PLACES=372, PETRI_TRANSITIONS=507} [2024-06-28 03:03:55,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-28 03:03:55,700 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 507 transitions, 6230 flow [2024-06-28 03:03:55,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:55,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:55,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:55,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 03:03:55,700 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:55,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:55,701 INFO L85 PathProgramCache]: Analyzing trace with hash -180279495, now seen corresponding path program 8 times [2024-06-28 03:03:55,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:55,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288621088] [2024-06-28 03:03:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:55,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:56,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:56,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288621088] [2024-06-28 03:03:56,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288621088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:56,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:56,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:03:56,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491913723] [2024-06-28 03:03:56,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:56,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:03:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:56,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:03:56,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:03:56,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:03:56,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 507 transitions, 6230 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:56,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:56,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:03:56,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:58,388 INFO L124 PetriNetUnfolderBase]: 3840/6258 cut-off events. [2024-06-28 03:03:58,388 INFO L125 PetriNetUnfolderBase]: For 1690297/1690300 co-relation queries the response was YES. [2024-06-28 03:03:58,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69386 conditions, 6258 events. 3840/6258 cut-off events. For 1690297/1690300 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39930 event pairs, 799 based on Foata normal form. 3/6201 useless extension candidates. Maximal degree in co-relation 69203. Up to 5547 conditions per place. [2024-06-28 03:03:58,487 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 394 selfloop transitions, 80 changer transitions 0/522 dead transitions. [2024-06-28 03:03:58,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 522 transitions, 7553 flow [2024-06-28 03:03:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:58,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 03:03:58,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-28 03:03:58,488 INFO L175 Difference]: Start difference. First operand has 372 places, 507 transitions, 6230 flow. Second operand 8 states and 153 transitions. [2024-06-28 03:03:58,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 522 transitions, 7553 flow [2024-06-28 03:04:02,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 522 transitions, 7300 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-28 03:04:02,854 INFO L231 Difference]: Finished difference. Result has 376 places, 511 transitions, 6263 flow [2024-06-28 03:04:02,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6263, PETRI_PLACES=376, PETRI_TRANSITIONS=511} [2024-06-28 03:04:02,854 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-28 03:04:02,854 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 511 transitions, 6263 flow [2024-06-28 03:04:02,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:02,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:02,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:02,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 03:04:02,855 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:02,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:02,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1935693573, now seen corresponding path program 9 times [2024-06-28 03:04:02,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:02,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117768587] [2024-06-28 03:04:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:02,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:04,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:04,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117768587] [2024-06-28 03:04:04,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117768587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:04,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:04,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:04:04,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981622375] [2024-06-28 03:04:04,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:04,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:04:04,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:04,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:04:04,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:04:04,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:04:04,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 511 transitions, 6263 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:04,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:04,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:04:04,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:05,596 INFO L124 PetriNetUnfolderBase]: 3840/6259 cut-off events. [2024-06-28 03:04:05,596 INFO L125 PetriNetUnfolderBase]: For 1709267/1709270 co-relation queries the response was YES. [2024-06-28 03:04:05,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69353 conditions, 6259 events. 3840/6259 cut-off events. For 1709267/1709270 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39939 event pairs, 797 based on Foata normal form. 4/6203 useless extension candidates. Maximal degree in co-relation 69169. Up to 5566 conditions per place. [2024-06-28 03:04:05,702 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 409 selfloop transitions, 67 changer transitions 0/524 dead transitions. [2024-06-28 03:04:05,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 524 transitions, 7332 flow [2024-06-28 03:04:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:04:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:04:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:04:05,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:04:05,703 INFO L175 Difference]: Start difference. First operand has 376 places, 511 transitions, 6263 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:04:05,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 524 transitions, 7332 flow [2024-06-28 03:04:10,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 524 transitions, 7102 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 03:04:10,079 INFO L231 Difference]: Finished difference. Result has 379 places, 514 transitions, 6271 flow [2024-06-28 03:04:10,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6046, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6271, PETRI_PLACES=379, PETRI_TRANSITIONS=514} [2024-06-28 03:04:10,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-28 03:04:10,080 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 514 transitions, 6271 flow [2024-06-28 03:04:10,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:10,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:10,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:10,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 03:04:10,081 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:10,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:10,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2118560383, now seen corresponding path program 10 times [2024-06-28 03:04:10,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:10,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603604577] [2024-06-28 03:04:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:10,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:11,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:11,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603604577] [2024-06-28 03:04:11,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603604577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:11,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:11,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:04:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622252260] [2024-06-28 03:04:11,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:11,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:04:11,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:11,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:04:11,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:04:11,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:04:11,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 514 transitions, 6271 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:11,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:11,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:04:11,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:12,673 INFO L124 PetriNetUnfolderBase]: 3844/6264 cut-off events. [2024-06-28 03:04:12,673 INFO L125 PetriNetUnfolderBase]: For 1726628/1726631 co-relation queries the response was YES. [2024-06-28 03:04:12,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69401 conditions, 6264 events. 3844/6264 cut-off events. For 1726628/1726631 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39985 event pairs, 799 based on Foata normal form. 4/6208 useless extension candidates. Maximal degree in co-relation 69216. Up to 5434 conditions per place. [2024-06-28 03:04:12,781 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 359 selfloop transitions, 122 changer transitions 0/529 dead transitions. [2024-06-28 03:04:12,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 529 transitions, 7855 flow [2024-06-28 03:04:12,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:04:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:04:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:04:12,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 03:04:12,782 INFO L175 Difference]: Start difference. First operand has 379 places, 514 transitions, 6271 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:04:12,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 529 transitions, 7855 flow [2024-06-28 03:04:18,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 529 transitions, 7672 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 03:04:18,102 INFO L231 Difference]: Finished difference. Result has 381 places, 517 transitions, 6426 flow [2024-06-28 03:04:18,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6426, PETRI_PLACES=381, PETRI_TRANSITIONS=517} [2024-06-28 03:04:18,103 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-28 03:04:18,103 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 517 transitions, 6426 flow [2024-06-28 03:04:18,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:18,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:18,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:18,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 03:04:18,103 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:18,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2124274303, now seen corresponding path program 11 times [2024-06-28 03:04:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:18,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144567821] [2024-06-28 03:04:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:19,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:19,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144567821] [2024-06-28 03:04:19,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144567821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:19,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:19,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:04:19,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577758477] [2024-06-28 03:04:19,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:19,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:04:19,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:19,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:04:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:04:19,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:04:19,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 517 transitions, 6426 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:19,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:19,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:04:19,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:20,781 INFO L124 PetriNetUnfolderBase]: 3835/6256 cut-off events. [2024-06-28 03:04:20,781 INFO L125 PetriNetUnfolderBase]: For 1731346/1731349 co-relation queries the response was YES. [2024-06-28 03:04:20,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69506 conditions, 6256 events. 3835/6256 cut-off events. For 1731346/1731349 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39989 event pairs, 799 based on Foata normal form. 3/6199 useless extension candidates. Maximal degree in co-relation 69320. Up to 5429 conditions per place. [2024-06-28 03:04:20,895 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 350 selfloop transitions, 130 changer transitions 0/528 dead transitions. [2024-06-28 03:04:20,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 528 transitions, 7670 flow [2024-06-28 03:04:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:04:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:04:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 03:04:20,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-28 03:04:20,896 INFO L175 Difference]: Start difference. First operand has 381 places, 517 transitions, 6426 flow. Second operand 8 states and 154 transitions. [2024-06-28 03:04:20,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 528 transitions, 7670 flow [2024-06-28 03:04:26,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 528 transitions, 7323 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-28 03:04:26,015 INFO L231 Difference]: Finished difference. Result has 384 places, 517 transitions, 6345 flow [2024-06-28 03:04:26,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6079, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6345, PETRI_PLACES=384, PETRI_TRANSITIONS=517} [2024-06-28 03:04:26,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-28 03:04:26,015 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 517 transitions, 6345 flow [2024-06-28 03:04:26,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:26,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:26,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:26,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 03:04:26,015 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:26,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:26,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1838699203, now seen corresponding path program 12 times [2024-06-28 03:04:26,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:26,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061785663] [2024-06-28 03:04:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:26,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:27,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:27,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061785663] [2024-06-28 03:04:27,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061785663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:27,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:27,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:04:27,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464274204] [2024-06-28 03:04:27,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:27,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:04:27,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:27,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:04:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:04:27,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:04:27,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 517 transitions, 6345 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:27,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:27,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:04:27,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:28,787 INFO L124 PetriNetUnfolderBase]: 3834/6252 cut-off events. [2024-06-28 03:04:28,787 INFO L125 PetriNetUnfolderBase]: For 1751832/1751835 co-relation queries the response was YES. [2024-06-28 03:04:28,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69403 conditions, 6252 events. 3834/6252 cut-off events. For 1751832/1751835 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39925 event pairs, 801 based on Foata normal form. 3/6195 useless extension candidates. Maximal degree in co-relation 69216. Up to 5558 conditions per place. [2024-06-28 03:04:28,884 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 409 selfloop transitions, 70 changer transitions 0/527 dead transitions. [2024-06-28 03:04:28,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 527 transitions, 7329 flow [2024-06-28 03:04:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:04:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:04:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:04:28,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 03:04:28,885 INFO L175 Difference]: Start difference. First operand has 384 places, 517 transitions, 6345 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:04:28,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 527 transitions, 7329 flow [2024-06-28 03:04:34,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 527 transitions, 6941 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-28 03:04:34,450 INFO L231 Difference]: Finished difference. Result has 383 places, 517 transitions, 6103 flow [2024-06-28 03:04:34,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6103, PETRI_PLACES=383, PETRI_TRANSITIONS=517} [2024-06-28 03:04:34,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-28 03:04:34,450 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 517 transitions, 6103 flow [2024-06-28 03:04:34,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:34,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:34,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:34,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 03:04:34,451 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:34,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:34,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1838698955, now seen corresponding path program 12 times [2024-06-28 03:04:34,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:34,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643723735] [2024-06-28 03:04:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:34,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:35,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:35,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643723735] [2024-06-28 03:04:35,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643723735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:35,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:35,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:04:35,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961086710] [2024-06-28 03:04:35,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:35,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:04:35,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:35,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:04:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:04:35,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:04:35,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 517 transitions, 6103 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:35,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:35,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:04:35,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:37,145 INFO L124 PetriNetUnfolderBase]: 3993/6448 cut-off events. [2024-06-28 03:04:37,145 INFO L125 PetriNetUnfolderBase]: For 1772761/1772761 co-relation queries the response was YES. [2024-06-28 03:04:37,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70345 conditions, 6448 events. 3993/6448 cut-off events. For 1772761/1772761 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40560 event pairs, 866 based on Foata normal form. 1/6435 useless extension candidates. Maximal degree in co-relation 70159. Up to 5756 conditions per place. [2024-06-28 03:04:37,253 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 111 changer transitions 0/528 dead transitions. [2024-06-28 03:04:37,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 528 transitions, 7437 flow [2024-06-28 03:04:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:04:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:04:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:04:37,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-28 03:04:37,254 INFO L175 Difference]: Start difference. First operand has 383 places, 517 transitions, 6103 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:04:37,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 528 transitions, 7437 flow [2024-06-28 03:04:43,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 528 transitions, 7151 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-28 03:04:43,900 INFO L231 Difference]: Finished difference. Result has 383 places, 517 transitions, 6045 flow [2024-06-28 03:04:43,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5817, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6045, PETRI_PLACES=383, PETRI_TRANSITIONS=517} [2024-06-28 03:04:43,901 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-28 03:04:43,901 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 517 transitions, 6045 flow [2024-06-28 03:04:43,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:43,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:43,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:43,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 03:04:43,901 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:43,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash -851766470, now seen corresponding path program 2 times [2024-06-28 03:04:43,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:43,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113791164] [2024-06-28 03:04:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:43,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:44,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:44,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113791164] [2024-06-28 03:04:44,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113791164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:44,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:44,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:04:44,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786609620] [2024-06-28 03:04:44,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:44,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:04:44,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:44,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:04:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:04:45,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:04:45,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 517 transitions, 6045 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-28 03:04:45,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:45,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:04:45,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:46,912 INFO L124 PetriNetUnfolderBase]: 4116/6673 cut-off events. [2024-06-28 03:04:46,912 INFO L125 PetriNetUnfolderBase]: For 1852493/1852496 co-relation queries the response was YES. [2024-06-28 03:04:46,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71709 conditions, 6673 events. 4116/6673 cut-off events. For 1852493/1852496 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 42517 event pairs, 836 based on Foata normal form. 14/6675 useless extension candidates. Maximal degree in co-relation 71522. Up to 5625 conditions per place. [2024-06-28 03:04:47,021 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 464 selfloop transitions, 94 changer transitions 0/563 dead transitions. [2024-06-28 03:04:47,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 563 transitions, 7453 flow [2024-06-28 03:04:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:04:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:04:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-28 03:04:47,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-28 03:04:47,022 INFO L175 Difference]: Start difference. First operand has 383 places, 517 transitions, 6045 flow. Second operand 10 states and 198 transitions. [2024-06-28 03:04:47,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 563 transitions, 7453 flow [2024-06-28 03:04:52,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 563 transitions, 7282 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 03:04:52,516 INFO L231 Difference]: Finished difference. Result has 389 places, 525 transitions, 6208 flow [2024-06-28 03:04:52,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5874, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6208, PETRI_PLACES=389, PETRI_TRANSITIONS=525} [2024-06-28 03:04:52,516 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-28 03:04:52,516 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 525 transitions, 6208 flow [2024-06-28 03:04:52,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-28 03:04:52,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:52,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:52,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 03:04:52,517 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:52,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:52,517 INFO L85 PathProgramCache]: Analyzing trace with hash 832087768, now seen corresponding path program 3 times [2024-06-28 03:04:52,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:52,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681277803] [2024-06-28 03:04:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:52,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:53,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:53,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681277803] [2024-06-28 03:04:53,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681277803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:53,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:53,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:04:53,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922867261] [2024-06-28 03:04:53,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:53,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:04:53,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:53,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:04:53,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:04:53,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:04:53,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 525 transitions, 6208 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-28 03:04:53,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:53,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:04:53,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:55,635 INFO L124 PetriNetUnfolderBase]: 4226/6883 cut-off events. [2024-06-28 03:04:55,635 INFO L125 PetriNetUnfolderBase]: For 1887165/1887168 co-relation queries the response was YES. [2024-06-28 03:04:55,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73661 conditions, 6883 events. 4226/6883 cut-off events. For 1887165/1887168 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44510 event pairs, 866 based on Foata normal form. 14/6885 useless extension candidates. Maximal degree in co-relation 73471. Up to 5898 conditions per place. [2024-06-28 03:04:55,757 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 463 selfloop transitions, 100 changer transitions 0/568 dead transitions. [2024-06-28 03:04:55,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 568 transitions, 7607 flow [2024-06-28 03:04:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:04:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:04:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-28 03:04:55,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-28 03:04:55,758 INFO L175 Difference]: Start difference. First operand has 389 places, 525 transitions, 6208 flow. Second operand 10 states and 197 transitions. [2024-06-28 03:04:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 568 transitions, 7607 flow [2024-06-28 03:05:01,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 568 transitions, 7407 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 03:05:01,785 INFO L231 Difference]: Finished difference. Result has 396 places, 531 transitions, 6337 flow [2024-06-28 03:05:01,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6014, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6337, PETRI_PLACES=396, PETRI_TRANSITIONS=531} [2024-06-28 03:05:01,786 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-28 03:05:01,786 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 531 transitions, 6337 flow [2024-06-28 03:05:01,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-28 03:05:01,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:01,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:01,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 03:05:01,786 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:01,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1393948376, now seen corresponding path program 4 times [2024-06-28 03:05:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:01,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630961664] [2024-06-28 03:05:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:02,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630961664] [2024-06-28 03:05:02,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630961664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:02,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:02,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:05:02,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174409452] [2024-06-28 03:05:02,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:02,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:05:02,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:05:02,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:05:02,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:05:02,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 531 transitions, 6337 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-28 03:05:02,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:02,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:05:02,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:05:05,087 INFO L124 PetriNetUnfolderBase]: 4247/6922 cut-off events. [2024-06-28 03:05:05,087 INFO L125 PetriNetUnfolderBase]: For 1852664/1852667 co-relation queries the response was YES. [2024-06-28 03:05:05,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73000 conditions, 6922 events. 4247/6922 cut-off events. For 1852664/1852667 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44832 event pairs, 862 based on Foata normal form. 14/6924 useless extension candidates. Maximal degree in co-relation 72807. Up to 5937 conditions per place. [2024-06-28 03:05:05,190 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 459 selfloop transitions, 107 changer transitions 0/571 dead transitions. [2024-06-28 03:05:05,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 571 transitions, 7681 flow [2024-06-28 03:05:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:05:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:05:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 03:05:05,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-28 03:05:05,191 INFO L175 Difference]: Start difference. First operand has 396 places, 531 transitions, 6337 flow. Second operand 10 states and 196 transitions. [2024-06-28 03:05:05,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 571 transitions, 7681 flow [2024-06-28 03:05:12,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 571 transitions, 7456 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 03:05:12,057 INFO L231 Difference]: Finished difference. Result has 402 places, 534 transitions, 6380 flow [2024-06-28 03:05:12,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6114, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6380, PETRI_PLACES=402, PETRI_TRANSITIONS=534} [2024-06-28 03:05:12,057 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-28 03:05:12,057 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 534 transitions, 6380 flow [2024-06-28 03:05:12,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-28 03:05:12,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:12,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:12,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 03:05:12,058 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:12,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:12,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1404990266, now seen corresponding path program 5 times [2024-06-28 03:05:12,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:12,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941666663] [2024-06-28 03:05:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:12,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:13,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:13,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941666663] [2024-06-28 03:05:13,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941666663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:13,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:13,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:05:13,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194244270] [2024-06-28 03:05:13,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:13,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:05:13,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:13,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:05:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:05:13,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:05:13,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 534 transitions, 6380 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-28 03:05:13,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:13,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:05:13,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:05:15,119 INFO L124 PetriNetUnfolderBase]: 4227/6890 cut-off events. [2024-06-28 03:05:15,119 INFO L125 PetriNetUnfolderBase]: For 1814418/1814421 co-relation queries the response was YES. [2024-06-28 03:05:15,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71729 conditions, 6890 events. 4227/6890 cut-off events. For 1814418/1814421 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44550 event pairs, 713 based on Foata normal form. 14/6892 useless extension candidates. Maximal degree in co-relation 71534. Up to 4862 conditions per place. [2024-06-28 03:05:15,243 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 443 selfloop transitions, 123 changer transitions 0/571 dead transitions. [2024-06-28 03:05:15,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 571 transitions, 7568 flow [2024-06-28 03:05:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:05:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:05:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-28 03:05:15,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 03:05:15,244 INFO L175 Difference]: Start difference. First operand has 402 places, 534 transitions, 6380 flow. Second operand 10 states and 195 transitions. [2024-06-28 03:05:15,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 571 transitions, 7568 flow [2024-06-28 03:05:20,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 571 transitions, 7220 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 03:05:20,991 INFO L231 Difference]: Finished difference. Result has 404 places, 533 transitions, 6164 flow [2024-06-28 03:05:20,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5914, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6164, PETRI_PLACES=404, PETRI_TRANSITIONS=533} [2024-06-28 03:05:20,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-28 03:05:20,991 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 533 transitions, 6164 flow [2024-06-28 03:05:20,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-28 03:05:20,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:20,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:20,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 03:05:20,992 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:20,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1764867763, now seen corresponding path program 4 times [2024-06-28 03:05:20,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:20,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68172875] [2024-06-28 03:05:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:20,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:22,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:22,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68172875] [2024-06-28 03:05:22,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68172875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:22,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:22,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:05:22,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137203541] [2024-06-28 03:05:22,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:22,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:05:22,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:22,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:05:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:05:22,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:05:22,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 533 transitions, 6164 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-28 03:05:22,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:22,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:05:22,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:05:23,729 INFO L124 PetriNetUnfolderBase]: 4066/6691 cut-off events. [2024-06-28 03:05:23,729 INFO L125 PetriNetUnfolderBase]: For 1788526/1788529 co-relation queries the response was YES. [2024-06-28 03:05:23,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69901 conditions, 6691 events. 4066/6691 cut-off events. For 1788526/1788529 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43883 event pairs, 827 based on Foata normal form. 6/6637 useless extension candidates. Maximal degree in co-relation 69706. Up to 5956 conditions per place. [2024-06-28 03:05:23,843 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 431 selfloop transitions, 68 changer transitions 0/547 dead transitions. [2024-06-28 03:05:23,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 547 transitions, 7342 flow [2024-06-28 03:05:23,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:05:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:05:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:05:23,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-28 03:05:23,844 INFO L175 Difference]: Start difference. First operand has 404 places, 533 transitions, 6164 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:05:23,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 547 transitions, 7342 flow [2024-06-28 03:05:29,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 547 transitions, 6995 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-28 03:05:29,302 INFO L231 Difference]: Finished difference. Result has 403 places, 536 transitions, 6117 flow [2024-06-28 03:05:29,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5817, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6117, PETRI_PLACES=403, PETRI_TRANSITIONS=536} [2024-06-28 03:05:29,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-28 03:05:29,302 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 536 transitions, 6117 flow [2024-06-28 03:05:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-28 03:05:29,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:29,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:29,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 03:05:29,303 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:29,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1165838735, now seen corresponding path program 5 times [2024-06-28 03:05:29,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:29,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264720148] [2024-06-28 03:05:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:29,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:30,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:30,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264720148] [2024-06-28 03:05:30,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264720148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:30,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:30,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:05:30,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874246144] [2024-06-28 03:05:30,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:30,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:05:30,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:30,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:05:30,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:05:30,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:05:30,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 536 transitions, 6117 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:05:30,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:30,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:05:30,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:05:32,332 INFO L124 PetriNetUnfolderBase]: 4122/6778 cut-off events. [2024-06-28 03:05:32,332 INFO L125 PetriNetUnfolderBase]: For 1844692/1844695 co-relation queries the response was YES. [2024-06-28 03:05:32,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70952 conditions, 6778 events. 4122/6778 cut-off events. For 1844692/1844695 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44573 event pairs, 800 based on Foata normal form. 6/6731 useless extension candidates. Maximal degree in co-relation 70757. Up to 6108 conditions per place. [2024-06-28 03:05:32,451 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 456 selfloop transitions, 56 changer transitions 0/560 dead transitions. [2024-06-28 03:05:32,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 560 transitions, 7802 flow [2024-06-28 03:05:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:05:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:05:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:05:32,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-28 03:05:32,452 INFO L175 Difference]: Start difference. First operand has 403 places, 536 transitions, 6117 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:05:32,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 560 transitions, 7802 flow [2024-06-28 03:05:39,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 560 transitions, 7524 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-28 03:05:39,695 INFO L231 Difference]: Finished difference. Result has 407 places, 544 transitions, 6318 flow [2024-06-28 03:05:39,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6318, PETRI_PLACES=407, PETRI_TRANSITIONS=544} [2024-06-28 03:05:39,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-28 03:05:39,695 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 544 transitions, 6318 flow [2024-06-28 03:05:39,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:05:39,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:39,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:39,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 03:05:39,696 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:39,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:39,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2072973037, now seen corresponding path program 6 times [2024-06-28 03:05:39,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:39,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121534394] [2024-06-28 03:05:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:39,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:40,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:40,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121534394] [2024-06-28 03:05:40,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121534394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:40,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:40,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:05:40,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340550140] [2024-06-28 03:05:40,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:40,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:05:40,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:40,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:05:40,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:05:41,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:05:41,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 544 transitions, 6318 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:05:41,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:41,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:05:41,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:05:42,892 INFO L124 PetriNetUnfolderBase]: 4152/6819 cut-off events. [2024-06-28 03:05:42,892 INFO L125 PetriNetUnfolderBase]: For 1909302/1909305 co-relation queries the response was YES. [2024-06-28 03:05:42,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72412 conditions, 6819 events. 4152/6819 cut-off events. For 1909302/1909305 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 44876 event pairs, 812 based on Foata normal form. 4/6763 useless extension candidates. Maximal degree in co-relation 72215. Up to 5789 conditions per place. [2024-06-28 03:05:42,999 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 403 selfloop transitions, 140 changer transitions 0/591 dead transitions. [2024-06-28 03:05:42,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 591 transitions, 9199 flow [2024-06-28 03:05:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:05:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:05:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 03:05:43,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-28 03:05:43,000 INFO L175 Difference]: Start difference. First operand has 407 places, 544 transitions, 6318 flow. Second operand 9 states and 175 transitions. [2024-06-28 03:05:43,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 591 transitions, 9199 flow [2024-06-28 03:05:49,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 591 transitions, 8535 flow, removed 204 selfloop flow, removed 7 redundant places. [2024-06-28 03:05:49,504 INFO L231 Difference]: Finished difference. Result has 412 places, 564 transitions, 6728 flow [2024-06-28 03:05:49,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5828, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6728, PETRI_PLACES=412, PETRI_TRANSITIONS=564} [2024-06-28 03:05:49,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-28 03:05:49,504 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 564 transitions, 6728 flow [2024-06-28 03:05:49,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:05:49,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:49,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:49,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 03:05:49,505 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:49,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1764880659, now seen corresponding path program 7 times [2024-06-28 03:05:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:49,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580603611] [2024-06-28 03:05:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:49,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:50,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:50,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580603611] [2024-06-28 03:05:50,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580603611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:50,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:50,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:05:50,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26229323] [2024-06-28 03:05:50,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:50,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:05:50,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:50,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:05:50,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:05:50,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:05:50,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 564 transitions, 6728 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:05:50,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:50,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:05:50,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:05:52,629 INFO L124 PetriNetUnfolderBase]: 4172/6854 cut-off events. [2024-06-28 03:05:52,629 INFO L125 PetriNetUnfolderBase]: For 1963735/1963738 co-relation queries the response was YES. [2024-06-28 03:05:52,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73270 conditions, 6854 events. 4172/6854 cut-off events. For 1963735/1963738 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 45113 event pairs, 829 based on Foata normal form. 6/6800 useless extension candidates. Maximal degree in co-relation 73071. Up to 6106 conditions per place. [2024-06-28 03:05:52,746 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 459 selfloop transitions, 75 changer transitions 0/582 dead transitions. [2024-06-28 03:05:52,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 582 transitions, 8101 flow [2024-06-28 03:05:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:05:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:05:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:05:52,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-28 03:05:52,747 INFO L175 Difference]: Start difference. First operand has 412 places, 564 transitions, 6728 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:05:52,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 582 transitions, 8101 flow [2024-06-28 03:05:58,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 582 transitions, 7791 flow, removed 121 selfloop flow, removed 3 redundant places. [2024-06-28 03:05:58,560 INFO L231 Difference]: Finished difference. Result has 418 places, 570 transitions, 6857 flow [2024-06-28 03:05:58,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6434, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6857, PETRI_PLACES=418, PETRI_TRANSITIONS=570} [2024-06-28 03:05:58,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-28 03:05:58,560 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 570 transitions, 6857 flow [2024-06-28 03:05:58,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:05:58,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:58,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:58,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 03:05:58,560 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:58,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:58,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2072986987, now seen corresponding path program 8 times [2024-06-28 03:05:58,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:58,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139664389] [2024-06-28 03:05:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:58,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:59,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:59,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139664389] [2024-06-28 03:05:59,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139664389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:59,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:59,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:05:59,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916811915] [2024-06-28 03:05:59,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:59,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:05:59,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:05:59,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:05:59,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:05:59,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 570 transitions, 6857 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:05:59,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:59,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:05:59,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:06:01,623 INFO L124 PetriNetUnfolderBase]: 4216/6918 cut-off events. [2024-06-28 03:06:01,623 INFO L125 PetriNetUnfolderBase]: For 2027047/2027050 co-relation queries the response was YES. [2024-06-28 03:06:01,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75223 conditions, 6918 events. 4216/6918 cut-off events. For 2027047/2027050 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 45493 event pairs, 825 based on Foata normal form. 6/6864 useless extension candidates. Maximal degree in co-relation 75022. Up to 5694 conditions per place. [2024-06-28 03:06:01,749 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 367 selfloop transitions, 190 changer transitions 0/605 dead transitions. [2024-06-28 03:06:01,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 605 transitions, 9725 flow [2024-06-28 03:06:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:06:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:06:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 03:06:01,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-28 03:06:01,750 INFO L175 Difference]: Start difference. First operand has 418 places, 570 transitions, 6857 flow. Second operand 9 states and 179 transitions. [2024-06-28 03:06:01,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 605 transitions, 9725 flow [2024-06-28 03:06:06,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 605 transitions, 9352 flow, removed 115 selfloop flow, removed 7 redundant places. [2024-06-28 03:06:06,178 INFO L231 Difference]: Finished difference. Result has 422 places, 587 transitions, 7698 flow [2024-06-28 03:06:06,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6484, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7698, PETRI_PLACES=422, PETRI_TRANSITIONS=587} [2024-06-28 03:06:06,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-28 03:06:06,178 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 587 transitions, 7698 flow [2024-06-28 03:06:06,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:06,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:06,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:06,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 03:06:06,179 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:06,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:06,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1661874769, now seen corresponding path program 9 times [2024-06-28 03:06:06,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:06,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429866437] [2024-06-28 03:06:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:06,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:07,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:07,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429866437] [2024-06-28 03:06:07,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429866437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:07,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:07,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:06:07,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719951436] [2024-06-28 03:06:07,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:07,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:06:07,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:07,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:06:07,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:06:07,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:06:07,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 587 transitions, 7698 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:07,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:07,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:06:07,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:06:09,365 INFO L124 PetriNetUnfolderBase]: 4242/6962 cut-off events. [2024-06-28 03:06:09,365 INFO L125 PetriNetUnfolderBase]: For 2063462/2063465 co-relation queries the response was YES. [2024-06-28 03:06:09,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76831 conditions, 6962 events. 4242/6962 cut-off events. For 2063462/2063465 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 45846 event pairs, 833 based on Foata normal form. 6/6908 useless extension candidates. Maximal degree in co-relation 76627. Up to 6086 conditions per place. [2024-06-28 03:06:09,490 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 464 selfloop transitions, 96 changer transitions 0/608 dead transitions. [2024-06-28 03:06:09,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 608 transitions, 9557 flow [2024-06-28 03:06:09,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:06:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:06:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 03:06:09,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:06:09,491 INFO L175 Difference]: Start difference. First operand has 422 places, 587 transitions, 7698 flow. Second operand 9 states and 172 transitions. [2024-06-28 03:06:09,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 608 transitions, 9557 flow [2024-06-28 03:06:15,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 608 transitions, 9147 flow, removed 171 selfloop flow, removed 3 redundant places. [2024-06-28 03:06:15,814 INFO L231 Difference]: Finished difference. Result has 429 places, 594 transitions, 7857 flow [2024-06-28 03:06:15,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7308, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7857, PETRI_PLACES=429, PETRI_TRANSITIONS=594} [2024-06-28 03:06:15,814 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-28 03:06:15,814 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 594 transitions, 7857 flow [2024-06-28 03:06:15,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:15,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:15,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:15,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 03:06:15,815 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:15,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1661860819, now seen corresponding path program 10 times [2024-06-28 03:06:15,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:15,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423324124] [2024-06-28 03:06:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:15,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:17,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:17,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423324124] [2024-06-28 03:06:17,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423324124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:17,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:17,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:06:17,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230439329] [2024-06-28 03:06:17,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:17,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:06:17,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:17,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:06:17,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:06:17,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:06:17,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 594 transitions, 7857 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:17,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:17,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:06:17,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:06:19,021 INFO L124 PetriNetUnfolderBase]: 4246/6968 cut-off events. [2024-06-28 03:06:19,021 INFO L125 PetriNetUnfolderBase]: For 2057410/2057413 co-relation queries the response was YES. [2024-06-28 03:06:19,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75815 conditions, 6968 events. 4246/6968 cut-off events. For 2057410/2057413 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 45857 event pairs, 832 based on Foata normal form. 6/6914 useless extension candidates. Maximal degree in co-relation 75608. Up to 6093 conditions per place. [2024-06-28 03:06:19,143 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 464 selfloop transitions, 102 changer transitions 0/614 dead transitions. [2024-06-28 03:06:19,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 614 transitions, 9598 flow [2024-06-28 03:06:19,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:06:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:06:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 03:06:19,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-28 03:06:19,145 INFO L175 Difference]: Start difference. First operand has 429 places, 594 transitions, 7857 flow. Second operand 9 states and 174 transitions. [2024-06-28 03:06:19,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 614 transitions, 9598 flow [2024-06-28 03:06:25,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 614 transitions, 8965 flow, removed 148 selfloop flow, removed 8 redundant places. [2024-06-28 03:06:25,616 INFO L231 Difference]: Finished difference. Result has 430 places, 600 transitions, 7718 flow [2024-06-28 03:06:25,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7262, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7718, PETRI_PLACES=430, PETRI_TRANSITIONS=600} [2024-06-28 03:06:25,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-28 03:06:25,616 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 600 transitions, 7718 flow [2024-06-28 03:06:25,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:25,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:25,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:25,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 03:06:25,617 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:25,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:25,617 INFO L85 PathProgramCache]: Analyzing trace with hash 541481355, now seen corresponding path program 1 times [2024-06-28 03:06:25,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:25,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171222466] [2024-06-28 03:06:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:26,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171222466] [2024-06-28 03:06:26,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171222466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:26,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:26,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:06:26,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94472371] [2024-06-28 03:06:26,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:26,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:06:26,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:06:26,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:06:26,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:06:26,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 600 transitions, 7718 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:26,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:26,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:06:26,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:06:28,780 INFO L124 PetriNetUnfolderBase]: 4274/7034 cut-off events. [2024-06-28 03:06:28,780 INFO L125 PetriNetUnfolderBase]: For 2043995/2043995 co-relation queries the response was YES. [2024-06-28 03:06:28,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75410 conditions, 7034 events. 4274/7034 cut-off events. For 2043995/2043995 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 46344 event pairs, 814 based on Foata normal form. 1/7032 useless extension candidates. Maximal degree in co-relation 75203. Up to 6444 conditions per place. [2024-06-28 03:06:28,899 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 571 selfloop transitions, 24 changer transitions 0/626 dead transitions. [2024-06-28 03:06:28,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 626 transitions, 9094 flow [2024-06-28 03:06:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:06:28,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:06:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:06:28,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-28 03:06:28,900 INFO L175 Difference]: Start difference. First operand has 430 places, 600 transitions, 7718 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:06:28,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 626 transitions, 9094 flow [2024-06-28 03:06:35,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 626 transitions, 8735 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-28 03:06:35,694 INFO L231 Difference]: Finished difference. Result has 433 places, 603 transitions, 7535 flow [2024-06-28 03:06:35,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7359, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7535, PETRI_PLACES=433, PETRI_TRANSITIONS=603} [2024-06-28 03:06:35,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-28 03:06:35,695 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 603 transitions, 7535 flow [2024-06-28 03:06:35,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:35,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:35,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:35,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-28 03:06:35,695 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:35,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:35,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1860984409, now seen corresponding path program 1 times [2024-06-28 03:06:35,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:35,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152291191] [2024-06-28 03:06:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:35,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:36,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:36,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152291191] [2024-06-28 03:06:36,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152291191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:36,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:36,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:06:36,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885074366] [2024-06-28 03:06:36,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:36,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:06:36,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:06:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:06:36,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:06:36,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 603 transitions, 7535 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:36,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:36,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:06:36,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:06:38,791 INFO L124 PetriNetUnfolderBase]: 4294/7066 cut-off events. [2024-06-28 03:06:38,791 INFO L125 PetriNetUnfolderBase]: For 2121177/2121177 co-relation queries the response was YES. [2024-06-28 03:06:38,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75914 conditions, 7066 events. 4294/7066 cut-off events. For 2121177/2121177 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 46610 event pairs, 813 based on Foata normal form. 6/7069 useless extension candidates. Maximal degree in co-relation 75706. Up to 6466 conditions per place. [2024-06-28 03:06:38,922 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 573 selfloop transitions, 25 changer transitions 0/629 dead transitions. [2024-06-28 03:06:38,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 629 transitions, 8925 flow [2024-06-28 03:06:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:06:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:06:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:06:38,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-28 03:06:38,923 INFO L175 Difference]: Start difference. First operand has 433 places, 603 transitions, 7535 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:06:38,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 629 transitions, 8925 flow [2024-06-28 03:06:47,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 629 transitions, 8769 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-28 03:06:47,021 INFO L231 Difference]: Finished difference. Result has 435 places, 607 transitions, 7560 flow [2024-06-28 03:06:47,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7379, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7560, PETRI_PLACES=435, PETRI_TRANSITIONS=607} [2024-06-28 03:06:47,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-28 03:06:47,022 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 607 transitions, 7560 flow [2024-06-28 03:06:47,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:47,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:47,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:47,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-28 03:06:47,022 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:47,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1856342779, now seen corresponding path program 2 times [2024-06-28 03:06:47,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:47,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483752425] [2024-06-28 03:06:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:47,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:47,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:47,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483752425] [2024-06-28 03:06:47,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483752425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:47,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:47,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:06:47,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067162256] [2024-06-28 03:06:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:47,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:06:47,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:06:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:06:48,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:06:48,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 607 transitions, 7560 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:48,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:48,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:06:48,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:06:50,189 INFO L124 PetriNetUnfolderBase]: 4318/7102 cut-off events. [2024-06-28 03:06:50,189 INFO L125 PetriNetUnfolderBase]: For 2158153/2158158 co-relation queries the response was YES. [2024-06-28 03:06:50,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77330 conditions, 7102 events. 4318/7102 cut-off events. For 2158153/2158158 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 46841 event pairs, 813 based on Foata normal form. 6/7105 useless extension candidates. Maximal degree in co-relation 77121. Up to 6491 conditions per place. [2024-06-28 03:06:50,315 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 570 selfloop transitions, 30 changer transitions 0/631 dead transitions. [2024-06-28 03:06:50,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 631 transitions, 8966 flow [2024-06-28 03:06:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:06:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:06:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:06:50,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-28 03:06:50,316 INFO L175 Difference]: Start difference. First operand has 435 places, 607 transitions, 7560 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:06:50,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 631 transitions, 8966 flow [2024-06-28 03:06:58,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 631 transitions, 8813 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-28 03:06:58,536 INFO L231 Difference]: Finished difference. Result has 437 places, 611 transitions, 7606 flow [2024-06-28 03:06:58,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7407, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7606, PETRI_PLACES=437, PETRI_TRANSITIONS=611} [2024-06-28 03:06:58,536 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-28 03:06:58,536 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 611 transitions, 7606 flow [2024-06-28 03:06:58,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:58,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:58,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:58,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-28 03:06:58,537 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:58,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:58,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2003175753, now seen corresponding path program 3 times [2024-06-28 03:06:58,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:58,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050998827] [2024-06-28 03:06:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:58,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:59,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:59,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050998827] [2024-06-28 03:06:59,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050998827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:59,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:59,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:06:59,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647271209] [2024-06-28 03:06:59,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:59,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:06:59,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:06:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:06:59,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:06:59,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 611 transitions, 7606 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:06:59,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:59,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:06:59,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:01,861 INFO L124 PetriNetUnfolderBase]: 4328/7116 cut-off events. [2024-06-28 03:07:01,861 INFO L125 PetriNetUnfolderBase]: For 2157760/2157769 co-relation queries the response was YES. [2024-06-28 03:07:01,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78133 conditions, 7116 events. 4328/7116 cut-off events. For 2157760/2157769 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 46959 event pairs, 813 based on Foata normal form. 8/7120 useless extension candidates. Maximal degree in co-relation 77923. Up to 6479 conditions per place. [2024-06-28 03:07:01,989 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 563 selfloop transitions, 41 changer transitions 0/635 dead transitions. [2024-06-28 03:07:01,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 635 transitions, 9013 flow [2024-06-28 03:07:01,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:07:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:07:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:07:01,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-28 03:07:01,990 INFO L175 Difference]: Start difference. First operand has 437 places, 611 transitions, 7606 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:07:01,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 635 transitions, 9013 flow [2024-06-28 03:07:10,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 635 transitions, 8842 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-28 03:07:10,599 INFO L231 Difference]: Finished difference. Result has 439 places, 614 transitions, 7642 flow [2024-06-28 03:07:10,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7435, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7642, PETRI_PLACES=439, PETRI_TRANSITIONS=614} [2024-06-28 03:07:10,600 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-28 03:07:10,600 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 614 transitions, 7642 flow [2024-06-28 03:07:10,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:07:10,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:10,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:10,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-28 03:07:10,600 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:10,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2119301653, now seen corresponding path program 4 times [2024-06-28 03:07:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:10,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243549333] [2024-06-28 03:07:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:10,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:11,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:11,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243549333] [2024-06-28 03:07:11,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243549333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:11,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:11,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:07:11,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345486877] [2024-06-28 03:07:11,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:11,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:07:11,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:11,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:07:11,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:07:11,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:07:11,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 614 transitions, 7642 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:07:11,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:11,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:07:11,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:13,799 INFO L124 PetriNetUnfolderBase]: 4355/7157 cut-off events. [2024-06-28 03:07:13,800 INFO L125 PetriNetUnfolderBase]: For 2219931/2219945 co-relation queries the response was YES. [2024-06-28 03:07:13,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79518 conditions, 7157 events. 4355/7157 cut-off events. For 2219931/2219945 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 47233 event pairs, 814 based on Foata normal form. 2/7155 useless extension candidates. Maximal degree in co-relation 79307. Up to 6522 conditions per place. [2024-06-28 03:07:13,931 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 568 selfloop transitions, 41 changer transitions 0/640 dead transitions. [2024-06-28 03:07:13,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 640 transitions, 9429 flow [2024-06-28 03:07:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:07:13,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:07:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:07:13,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-28 03:07:13,932 INFO L175 Difference]: Start difference. First operand has 439 places, 614 transitions, 7642 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:07:13,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 640 transitions, 9429 flow [2024-06-28 03:07:23,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 640 transitions, 9246 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-28 03:07:23,125 INFO L231 Difference]: Finished difference. Result has 442 places, 622 transitions, 7767 flow [2024-06-28 03:07:23,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7459, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7767, PETRI_PLACES=442, PETRI_TRANSITIONS=622} [2024-06-28 03:07:23,126 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-28 03:07:23,126 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 622 transitions, 7767 flow [2024-06-28 03:07:23,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:07:23,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:23,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:23,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-28 03:07:23,126 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:23,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:23,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2119308163, now seen corresponding path program 5 times [2024-06-28 03:07:23,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:23,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262642899] [2024-06-28 03:07:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:23,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:24,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:24,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262642899] [2024-06-28 03:07:24,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262642899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:24,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:24,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:07:24,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096621139] [2024-06-28 03:07:24,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:24,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:07:24,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:24,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:07:24,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:07:24,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:07:24,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 622 transitions, 7767 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:07:24,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:24,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:07:24,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:26,465 INFO L124 PetriNetUnfolderBase]: 4343/7141 cut-off events. [2024-06-28 03:07:26,465 INFO L125 PetriNetUnfolderBase]: For 2234155/2234165 co-relation queries the response was YES. [2024-06-28 03:07:26,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79690 conditions, 7141 events. 4343/7141 cut-off events. For 2234155/2234165 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 47139 event pairs, 813 based on Foata normal form. 5/7142 useless extension candidates. Maximal degree in co-relation 79477. Up to 6518 conditions per place. [2024-06-28 03:07:26,589 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 572 selfloop transitions, 36 changer transitions 0/639 dead transitions. [2024-06-28 03:07:26,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 639 transitions, 9067 flow [2024-06-28 03:07:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:07:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:07:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:07:26,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-28 03:07:26,590 INFO L175 Difference]: Start difference. First operand has 442 places, 622 transitions, 7767 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:07:26,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 639 transitions, 9067 flow [2024-06-28 03:07:34,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 639 transitions, 8841 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-28 03:07:34,084 INFO L231 Difference]: Finished difference. Result has 445 places, 622 transitions, 7620 flow [2024-06-28 03:07:34,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7541, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7620, PETRI_PLACES=445, PETRI_TRANSITIONS=622} [2024-06-28 03:07:34,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-28 03:07:34,084 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 622 transitions, 7620 flow [2024-06-28 03:07:34,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:07:34,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:34,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:34,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-28 03:07:34,085 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:34,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:34,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1683615739, now seen corresponding path program 6 times [2024-06-28 03:07:34,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:34,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691302306] [2024-06-28 03:07:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:34,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:35,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:35,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691302306] [2024-06-28 03:07:35,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691302306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:35,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:35,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:07:35,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888766308] [2024-06-28 03:07:35,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:35,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:07:35,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:35,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:07:35,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:07:35,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:07:35,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 622 transitions, 7620 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:07:35,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:35,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:07:35,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:37,421 INFO L124 PetriNetUnfolderBase]: 4365/7173 cut-off events. [2024-06-28 03:07:37,422 INFO L125 PetriNetUnfolderBase]: For 2273979/2273989 co-relation queries the response was YES. [2024-06-28 03:07:37,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80373 conditions, 7173 events. 4365/7173 cut-off events. For 2273979/2273989 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 47376 event pairs, 813 based on Foata normal form. 3/7173 useless extension candidates. Maximal degree in co-relation 80159. Up to 6465 conditions per place. [2024-06-28 03:07:37,558 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 549 selfloop transitions, 71 changer transitions 0/651 dead transitions. [2024-06-28 03:07:37,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 651 transitions, 9536 flow [2024-06-28 03:07:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:07:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:07:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:07:37,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:07:37,559 INFO L175 Difference]: Start difference. First operand has 445 places, 622 transitions, 7620 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:07:37,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 651 transitions, 9536 flow [2024-06-28 03:07:46,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 651 transitions, 9465 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 03:07:46,392 INFO L231 Difference]: Finished difference. Result has 448 places, 629 transitions, 8013 flow [2024-06-28 03:07:46,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7549, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8013, PETRI_PLACES=448, PETRI_TRANSITIONS=629} [2024-06-28 03:07:46,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-28 03:07:46,392 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 629 transitions, 8013 flow [2024-06-28 03:07:46,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:07:46,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:46,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-28 03:07:46,393 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:46,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1942368679, now seen corresponding path program 7 times [2024-06-28 03:07:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:46,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377689932] [2024-06-28 03:07:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:46,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:47,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:47,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377689932] [2024-06-28 03:07:47,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377689932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:47,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:47,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:07:47,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645877728] [2024-06-28 03:07:47,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:47,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:07:47,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:47,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:07:47,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:07:47,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:07:47,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 629 transitions, 8013 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:07:47,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:47,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:07:47,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:49,792 INFO L124 PetriNetUnfolderBase]: 4397/7220 cut-off events. [2024-06-28 03:07:49,792 INFO L125 PetriNetUnfolderBase]: For 2352649/2352659 co-relation queries the response was YES. [2024-06-28 03:07:49,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82536 conditions, 7220 events. 4397/7220 cut-off events. For 2352649/2352659 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 47676 event pairs, 823 based on Foata normal form. 7/7220 useless extension candidates. Maximal degree in co-relation 82320. Up to 6571 conditions per place. [2024-06-28 03:07:49,921 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 572 selfloop transitions, 45 changer transitions 0/648 dead transitions. [2024-06-28 03:07:49,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 648 transitions, 9493 flow [2024-06-28 03:07:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:07:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:07:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:07:49,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-28 03:07:49,922 INFO L175 Difference]: Start difference. First operand has 448 places, 629 transitions, 8013 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:07:49,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 648 transitions, 9493 flow [2024-06-28 03:07:58,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 648 transitions, 9325 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-28 03:07:58,372 INFO L231 Difference]: Finished difference. Result has 452 places, 633 transitions, 8104 flow [2024-06-28 03:07:58,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7845, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8104, PETRI_PLACES=452, PETRI_TRANSITIONS=633} [2024-06-28 03:07:58,373 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-28 03:07:58,373 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 633 transitions, 8104 flow [2024-06-28 03:07:58,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:07:58,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:58,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:58,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-28 03:07:58,374 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:58,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:58,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1838951729, now seen corresponding path program 8 times [2024-06-28 03:07:58,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:58,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599120799] [2024-06-28 03:07:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:58,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:59,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:59,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599120799] [2024-06-28 03:07:59,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599120799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:59,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:59,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:07:59,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036506428] [2024-06-28 03:07:59,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:59,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:07:59,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:59,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:07:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:07:59,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:07:59,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 633 transitions, 8104 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:07:59,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:59,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:07:59,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:01,799 INFO L124 PetriNetUnfolderBase]: 4401/7226 cut-off events. [2024-06-28 03:08:01,799 INFO L125 PetriNetUnfolderBase]: For 2325634/2325644 co-relation queries the response was YES. [2024-06-28 03:08:01,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83266 conditions, 7226 events. 4401/7226 cut-off events. For 2325634/2325644 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 47695 event pairs, 822 based on Foata normal form. 2/7222 useless extension candidates. Maximal degree in co-relation 83048. Up to 6577 conditions per place. [2024-06-28 03:08:01,941 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 574 selfloop transitions, 50 changer transitions 0/655 dead transitions. [2024-06-28 03:08:01,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 655 transitions, 9680 flow [2024-06-28 03:08:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:08:01,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-28 03:08:01,942 INFO L175 Difference]: Start difference. First operand has 452 places, 633 transitions, 8104 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:08:01,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 655 transitions, 9680 flow [2024-06-28 03:08:12,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 655 transitions, 9344 flow, removed 124 selfloop flow, removed 7 redundant places. [2024-06-28 03:08:12,631 INFO L231 Difference]: Finished difference. Result has 455 places, 641 transitions, 8139 flow [2024-06-28 03:08:12,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7875, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8139, PETRI_PLACES=455, PETRI_TRANSITIONS=641} [2024-06-28 03:08:12,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-28 03:08:12,632 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 641 transitions, 8139 flow [2024-06-28 03:08:12,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:08:12,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:12,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:12,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-28 03:08:12,632 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:12,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:12,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2124282239, now seen corresponding path program 9 times [2024-06-28 03:08:12,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:12,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14977438] [2024-06-28 03:08:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:12,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:13,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:13,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14977438] [2024-06-28 03:08:13,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14977438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:13,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:13,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:08:13,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150751297] [2024-06-28 03:08:13,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:13,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:08:13,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:13,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:08:13,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:08:13,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:08:13,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 641 transitions, 8139 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:08:13,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:13,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:08:13,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:16,066 INFO L124 PetriNetUnfolderBase]: 4411/7241 cut-off events. [2024-06-28 03:08:16,067 INFO L125 PetriNetUnfolderBase]: For 2382533/2382543 co-relation queries the response was YES. [2024-06-28 03:08:16,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83787 conditions, 7241 events. 4411/7241 cut-off events. For 2382533/2382543 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 47767 event pairs, 823 based on Foata normal form. 4/7238 useless extension candidates. Maximal degree in co-relation 83567. Up to 6417 conditions per place. [2024-06-28 03:08:16,202 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 518 selfloop transitions, 118 changer transitions 0/667 dead transitions. [2024-06-28 03:08:16,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 667 transitions, 10533 flow [2024-06-28 03:08:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 03:08:16,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-28 03:08:16,203 INFO L175 Difference]: Start difference. First operand has 455 places, 641 transitions, 8139 flow. Second operand 9 states and 173 transitions. [2024-06-28 03:08:16,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 667 transitions, 10533 flow [2024-06-28 03:08:27,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 667 transitions, 10377 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-28 03:08:27,564 INFO L231 Difference]: Finished difference. Result has 461 places, 650 transitions, 8747 flow [2024-06-28 03:08:27,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7983, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8747, PETRI_PLACES=461, PETRI_TRANSITIONS=650} [2024-06-28 03:08:27,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-28 03:08:27,564 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 650 transitions, 8747 flow [2024-06-28 03:08:27,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:08:27,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:27,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:27,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-28 03:08:27,564 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:27,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:27,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1839182369, now seen corresponding path program 10 times [2024-06-28 03:08:27,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:27,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382756373] [2024-06-28 03:08:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:27,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:28,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:28,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382756373] [2024-06-28 03:08:28,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382756373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:28,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:28,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:08:28,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383140178] [2024-06-28 03:08:28,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:28,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:08:28,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:28,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:08:28,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:08:28,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:08:28,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 650 transitions, 8747 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:08:28,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:28,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:08:28,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:31,044 INFO L124 PetriNetUnfolderBase]: 4412/7242 cut-off events. [2024-06-28 03:08:31,044 INFO L125 PetriNetUnfolderBase]: For 2387467/2387477 co-relation queries the response was YES. [2024-06-28 03:08:31,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84865 conditions, 7242 events. 4412/7242 cut-off events. For 2387467/2387477 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 47800 event pairs, 821 based on Foata normal form. 3/7239 useless extension candidates. Maximal degree in co-relation 84641. Up to 6555 conditions per place. [2024-06-28 03:08:31,188 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 571 selfloop transitions, 69 changer transitions 0/671 dead transitions. [2024-06-28 03:08:31,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 671 transitions, 10613 flow [2024-06-28 03:08:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 03:08:31,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-28 03:08:31,189 INFO L175 Difference]: Start difference. First operand has 461 places, 650 transitions, 8747 flow. Second operand 9 states and 173 transitions. [2024-06-28 03:08:31,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 671 transitions, 10613 flow [2024-06-28 03:08:41,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 671 transitions, 10389 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-28 03:08:41,579 INFO L231 Difference]: Finished difference. Result has 466 places, 653 transitions, 8817 flow [2024-06-28 03:08:41,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8531, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8817, PETRI_PLACES=466, PETRI_TRANSITIONS=653} [2024-06-28 03:08:41,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-28 03:08:41,580 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 653 transitions, 8817 flow [2024-06-28 03:08:41,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:08:41,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:41,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:41,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-28 03:08:41,581 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:41,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1615795557, now seen corresponding path program 1 times [2024-06-28 03:08:41,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:41,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134222090] [2024-06-28 03:08:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:41,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:42,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134222090] [2024-06-28 03:08:42,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134222090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:42,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:42,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:08:42,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366722078] [2024-06-28 03:08:42,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:42,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:08:42,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:42,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:08:42,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:08:42,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:08:42,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 653 transitions, 8817 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:08:42,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:42,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:08:42,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:44,982 INFO L124 PetriNetUnfolderBase]: 4436/7235 cut-off events. [2024-06-28 03:08:44,982 INFO L125 PetriNetUnfolderBase]: For 2425610/2425624 co-relation queries the response was YES. [2024-06-28 03:08:45,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85262 conditions, 7235 events. 4436/7235 cut-off events. For 2425610/2425624 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 47403 event pairs, 651 based on Foata normal form. 13/7207 useless extension candidates. Maximal degree in co-relation 85036. Up to 6490 conditions per place. [2024-06-28 03:08:45,118 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 592 selfloop transitions, 44 changer transitions 0/685 dead transitions. [2024-06-28 03:08:45,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 685 transitions, 10318 flow [2024-06-28 03:08:45,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 03:08:45,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-28 03:08:45,119 INFO L175 Difference]: Start difference. First operand has 466 places, 653 transitions, 8817 flow. Second operand 9 states and 178 transitions. [2024-06-28 03:08:45,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 685 transitions, 10318 flow [2024-06-28 03:08:56,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 685 transitions, 9944 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-28 03:08:56,940 INFO L231 Difference]: Finished difference. Result has 467 places, 656 transitions, 8683 flow [2024-06-28 03:08:56,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8443, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8683, PETRI_PLACES=467, PETRI_TRANSITIONS=656} [2024-06-28 03:08:56,941 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-28 03:08:56,941 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 656 transitions, 8683 flow [2024-06-28 03:08:56,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:08:56,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:56,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:56,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-28 03:08:56,941 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:56,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1625061147, now seen corresponding path program 2 times [2024-06-28 03:08:56,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:56,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865445268] [2024-06-28 03:08:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:56,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:57,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:57,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865445268] [2024-06-28 03:08:57,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865445268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:57,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:57,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:08:57,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611656257] [2024-06-28 03:08:57,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:57,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:08:57,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:08:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:08:58,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:08:58,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 656 transitions, 8683 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:08:58,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:58,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:08:58,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:00,256 INFO L124 PetriNetUnfolderBase]: 4452/7259 cut-off events. [2024-06-28 03:09:00,256 INFO L125 PetriNetUnfolderBase]: For 2452385/2452399 co-relation queries the response was YES. [2024-06-28 03:09:00,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85495 conditions, 7259 events. 4452/7259 cut-off events. For 2452385/2452399 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 47694 event pairs, 808 based on Foata normal form. 13/7211 useless extension candidates. Maximal degree in co-relation 85269. Up to 6570 conditions per place. [2024-06-28 03:09:00,397 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 588 selfloop transitions, 46 changer transitions 0/683 dead transitions. [2024-06-28 03:09:00,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 683 transitions, 10172 flow [2024-06-28 03:09:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:09:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:09:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 03:09:00,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-28 03:09:00,398 INFO L175 Difference]: Start difference. First operand has 467 places, 656 transitions, 8683 flow. Second operand 9 states and 175 transitions. [2024-06-28 03:09:00,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 683 transitions, 10172 flow [2024-06-28 03:09:11,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 683 transitions, 9954 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-28 03:09:11,386 INFO L231 Difference]: Finished difference. Result has 469 places, 659 transitions, 8715 flow [2024-06-28 03:09:11,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8465, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8715, PETRI_PLACES=469, PETRI_TRANSITIONS=659} [2024-06-28 03:09:11,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-28 03:09:11,386 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 659 transitions, 8715 flow [2024-06-28 03:09:11,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:09:11,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:11,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:11,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-28 03:09:11,387 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:11,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash -567885857, now seen corresponding path program 3 times [2024-06-28 03:09:11,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:11,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047476297] [2024-06-28 03:09:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:11,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:12,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:12,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047476297] [2024-06-28 03:09:12,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047476297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:12,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:12,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:12,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386279694] [2024-06-28 03:09:12,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:12,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:12,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:12,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:12,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:12,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:09:12,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 659 transitions, 8715 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:09:12,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:12,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:09:12,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:14,865 INFO L124 PetriNetUnfolderBase]: 4468/7283 cut-off events. [2024-06-28 03:09:14,865 INFO L125 PetriNetUnfolderBase]: For 2483147/2483161 co-relation queries the response was YES. [2024-06-28 03:09:14,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85984 conditions, 7283 events. 4468/7283 cut-off events. For 2483147/2483161 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 47849 event pairs, 806 based on Foata normal form. 13/7235 useless extension candidates. Maximal degree in co-relation 85757. Up to 6584 conditions per place. [2024-06-28 03:09:15,001 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 593 selfloop transitions, 45 changer transitions 0/687 dead transitions. [2024-06-28 03:09:15,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 687 transitions, 10220 flow [2024-06-28 03:09:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:09:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:09:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 03:09:15,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-28 03:09:15,002 INFO L175 Difference]: Start difference. First operand has 469 places, 659 transitions, 8715 flow. Second operand 9 states and 175 transitions. [2024-06-28 03:09:15,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 687 transitions, 10220 flow [2024-06-28 03:09:25,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 687 transitions, 9992 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-28 03:09:25,293 INFO L231 Difference]: Finished difference. Result has 471 places, 662 transitions, 8741 flow [2024-06-28 03:09:25,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8487, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8741, PETRI_PLACES=471, PETRI_TRANSITIONS=662} [2024-06-28 03:09:25,294 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-28 03:09:25,294 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 662 transitions, 8741 flow [2024-06-28 03:09:25,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:09:25,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:25,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:25,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-28 03:09:25,295 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:25,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:25,295 INFO L85 PathProgramCache]: Analyzing trace with hash -460783399, now seen corresponding path program 1 times [2024-06-28 03:09:25,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:25,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181747319] [2024-06-28 03:09:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:25,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:26,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:26,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181747319] [2024-06-28 03:09:26,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181747319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:26,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:26,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:09:26,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385838468] [2024-06-28 03:09:26,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:26,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:09:26,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:26,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:09:26,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:09:26,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:09:26,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 662 transitions, 8741 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:26,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:26,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:09:26,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:28,342 INFO L124 PetriNetUnfolderBase]: 4656/7520 cut-off events. [2024-06-28 03:09:28,343 INFO L125 PetriNetUnfolderBase]: For 2470119/2470119 co-relation queries the response was YES. [2024-06-28 03:09:28,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87659 conditions, 7520 events. 4656/7520 cut-off events. For 2470119/2470119 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 48728 event pairs, 855 based on Foata normal form. 1/7515 useless extension candidates. Maximal degree in co-relation 87431. Up to 6946 conditions per place. [2024-06-28 03:09:28,491 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 632 selfloop transitions, 53 changer transitions 0/690 dead transitions. [2024-06-28 03:09:28,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 690 transitions, 10301 flow [2024-06-28 03:09:28,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:09:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:09:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:09:28,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 03:09:28,492 INFO L175 Difference]: Start difference. First operand has 471 places, 662 transitions, 8741 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:09:28,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 690 transitions, 10301 flow [2024-06-28 03:09:39,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 690 transitions, 10069 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-28 03:09:39,838 INFO L231 Difference]: Finished difference. Result has 472 places, 665 transitions, 8736 flow [2024-06-28 03:09:39,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8509, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8736, PETRI_PLACES=472, PETRI_TRANSITIONS=665} [2024-06-28 03:09:39,839 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 428 predicate places. [2024-06-28 03:09:39,839 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 665 transitions, 8736 flow [2024-06-28 03:09:39,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:39,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:39,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:39,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-28 03:09:39,839 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:39,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:39,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1138325965, now seen corresponding path program 2 times [2024-06-28 03:09:39,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:39,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883946311] [2024-06-28 03:09:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:39,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:40,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:40,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883946311] [2024-06-28 03:09:40,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883946311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:40,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:40,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:40,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623762201] [2024-06-28 03:09:40,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:40,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:40,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:40,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:40,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:40,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:09:40,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 665 transitions, 8736 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:40,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:40,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:09:40,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:43,332 INFO L124 PetriNetUnfolderBase]: 4669/7540 cut-off events. [2024-06-28 03:09:43,332 INFO L125 PetriNetUnfolderBase]: For 2509414/2509414 co-relation queries the response was YES. [2024-06-28 03:09:43,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88042 conditions, 7540 events. 4669/7540 cut-off events. For 2509414/2509414 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 48836 event pairs, 855 based on Foata normal form. 1/7535 useless extension candidates. Maximal degree in co-relation 87813. Up to 6949 conditions per place. [2024-06-28 03:09:43,464 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 627 selfloop transitions, 62 changer transitions 0/694 dead transitions. [2024-06-28 03:09:43,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 694 transitions, 10731 flow [2024-06-28 03:09:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:09:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:09:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:09:43,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 03:09:43,465 INFO L175 Difference]: Start difference. First operand has 472 places, 665 transitions, 8736 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:09:43,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 694 transitions, 10731 flow [2024-06-28 03:09:54,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 694 transitions, 10541 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-28 03:09:54,644 INFO L231 Difference]: Finished difference. Result has 474 places, 671 transitions, 8912 flow [2024-06-28 03:09:54,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8546, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8912, PETRI_PLACES=474, PETRI_TRANSITIONS=671} [2024-06-28 03:09:54,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 430 predicate places. [2024-06-28 03:09:54,644 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 671 transitions, 8912 flow [2024-06-28 03:09:54,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:54,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:54,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:54,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-28 03:09:54,644 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:54,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:54,645 INFO L85 PathProgramCache]: Analyzing trace with hash 988903726, now seen corresponding path program 1 times [2024-06-28 03:09:54,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:54,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886220342] [2024-06-28 03:09:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:54,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:55,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:55,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886220342] [2024-06-28 03:09:55,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886220342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:55,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:55,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:55,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560790441] [2024-06-28 03:09:55,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:55,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:55,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:55,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:55,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:09:55,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 671 transitions, 8912 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:55,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:55,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:09:55,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:58,184 INFO L124 PetriNetUnfolderBase]: 4689/7572 cut-off events. [2024-06-28 03:09:58,184 INFO L125 PetriNetUnfolderBase]: For 2578974/2578974 co-relation queries the response was YES. [2024-06-28 03:09:58,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88735 conditions, 7572 events. 4689/7572 cut-off events. For 2578974/2578974 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49143 event pairs, 857 based on Foata normal form. 4/7570 useless extension candidates. Maximal degree in co-relation 88505. Up to 6870 conditions per place. [2024-06-28 03:09:58,321 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 625 selfloop transitions, 72 changer transitions 0/702 dead transitions. [2024-06-28 03:09:58,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 702 transitions, 10592 flow [2024-06-28 03:09:58,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:09:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:09:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 03:09:58,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-28 03:09:58,322 INFO L175 Difference]: Start difference. First operand has 474 places, 671 transitions, 8912 flow. Second operand 9 states and 175 transitions. [2024-06-28 03:09:58,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 702 transitions, 10592 flow [2024-06-28 03:10:10,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 702 transitions, 10429 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-28 03:10:10,153 INFO L231 Difference]: Finished difference. Result has 479 places, 675 transitions, 9080 flow [2024-06-28 03:10:10,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8749, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9080, PETRI_PLACES=479, PETRI_TRANSITIONS=675} [2024-06-28 03:10:10,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 435 predicate places. [2024-06-28 03:10:10,154 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 675 transitions, 9080 flow [2024-06-28 03:10:10,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:10,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:10,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:10,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-28 03:10:10,154 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:10,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:10,154 INFO L85 PathProgramCache]: Analyzing trace with hash 988695189, now seen corresponding path program 3 times [2024-06-28 03:10:10,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:10,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142352706] [2024-06-28 03:10:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:10,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:10,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:10,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142352706] [2024-06-28 03:10:10,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142352706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:10,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:10,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:10:10,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582740107] [2024-06-28 03:10:10,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:10,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:10:10,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:10,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:10:10,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:10:11,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:10:11,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 675 transitions, 9080 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:11,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:11,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:10:11,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:13,776 INFO L124 PetriNetUnfolderBase]: 4694/7579 cut-off events. [2024-06-28 03:10:13,776 INFO L125 PetriNetUnfolderBase]: For 2580948/2580948 co-relation queries the response was YES. [2024-06-28 03:10:13,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89911 conditions, 7579 events. 4694/7579 cut-off events. For 2580948/2580948 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49258 event pairs, 853 based on Foata normal form. 1/7574 useless extension candidates. Maximal degree in co-relation 89679. Up to 6999 conditions per place. [2024-06-28 03:10:13,917 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 645 selfloop transitions, 50 changer transitions 0/700 dead transitions. [2024-06-28 03:10:13,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 700 transitions, 10655 flow [2024-06-28 03:10:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:10:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:10:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:10:13,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:10:13,919 INFO L175 Difference]: Start difference. First operand has 479 places, 675 transitions, 9080 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:10:13,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 700 transitions, 10655 flow [2024-06-28 03:10:22,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 700 transitions, 10409 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-28 03:10:22,847 INFO L231 Difference]: Finished difference. Result has 481 places, 678 transitions, 9063 flow [2024-06-28 03:10:22,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8834, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9063, PETRI_PLACES=481, PETRI_TRANSITIONS=678} [2024-06-28 03:10:22,848 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 437 predicate places. [2024-06-28 03:10:22,848 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 678 transitions, 9063 flow [2024-06-28 03:10:22,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:22,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:22,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:22,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-28 03:10:22,848 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:22,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:22,848 INFO L85 PathProgramCache]: Analyzing trace with hash 989053456, now seen corresponding path program 2 times [2024-06-28 03:10:22,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:22,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551408672] [2024-06-28 03:10:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:22,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:23,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:23,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551408672] [2024-06-28 03:10:23,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551408672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:23,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:23,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:10:23,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868553377] [2024-06-28 03:10:23,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:23,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:10:23,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:23,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:10:23,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:10:23,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:10:23,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 678 transitions, 9063 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:23,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:23,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:10:23,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:26,446 INFO L124 PetriNetUnfolderBase]: 4714/7611 cut-off events. [2024-06-28 03:10:26,446 INFO L125 PetriNetUnfolderBase]: For 2654708/2654708 co-relation queries the response was YES. [2024-06-28 03:10:26,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90209 conditions, 7611 events. 4714/7611 cut-off events. For 2654708/2654708 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 49457 event pairs, 857 based on Foata normal form. 4/7609 useless extension candidates. Maximal degree in co-relation 89977. Up to 6887 conditions per place. [2024-06-28 03:10:26,686 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 623 selfloop transitions, 79 changer transitions 0/707 dead transitions. [2024-06-28 03:10:26,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 707 transitions, 10783 flow [2024-06-28 03:10:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:10:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:10:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 03:10:26,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-28 03:10:26,687 INFO L175 Difference]: Start difference. First operand has 481 places, 678 transitions, 9063 flow. Second operand 9 states and 175 transitions. [2024-06-28 03:10:26,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 707 transitions, 10783 flow [2024-06-28 03:10:35,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 707 transitions, 10597 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-28 03:10:35,926 INFO L231 Difference]: Finished difference. Result has 484 places, 682 transitions, 9230 flow [2024-06-28 03:10:35,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8877, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9230, PETRI_PLACES=484, PETRI_TRANSITIONS=682} [2024-06-28 03:10:35,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 440 predicate places. [2024-06-28 03:10:35,926 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 682 transitions, 9230 flow [2024-06-28 03:10:35,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:35,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:35,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:35,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-28 03:10:35,927 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:35,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:35,927 INFO L85 PathProgramCache]: Analyzing trace with hash 989053673, now seen corresponding path program 1 times [2024-06-28 03:10:35,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:35,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370264287] [2024-06-28 03:10:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:35,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:36,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:36,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370264287] [2024-06-28 03:10:36,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370264287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:36,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:36,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:10:36,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329563540] [2024-06-28 03:10:36,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:36,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:10:36,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:36,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:10:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:10:36,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:10:36,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 682 transitions, 9230 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:36,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:36,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:10:36,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:39,716 INFO L124 PetriNetUnfolderBase]: 4724/7625 cut-off events. [2024-06-28 03:10:39,716 INFO L125 PetriNetUnfolderBase]: For 2671491/2671491 co-relation queries the response was YES. [2024-06-28 03:10:39,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91404 conditions, 7625 events. 4724/7625 cut-off events. For 2671491/2671491 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 49605 event pairs, 851 based on Foata normal form. 2/7621 useless extension candidates. Maximal degree in co-relation 91171. Up to 7032 conditions per place. [2024-06-28 03:10:39,876 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 650 selfloop transitions, 54 changer transitions 0/709 dead transitions. [2024-06-28 03:10:39,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 709 transitions, 10870 flow [2024-06-28 03:10:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:10:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:10:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:10:39,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-28 03:10:39,877 INFO L175 Difference]: Start difference. First operand has 484 places, 682 transitions, 9230 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:10:39,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 709 transitions, 10870 flow [2024-06-28 03:10:50,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 709 transitions, 10555 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-28 03:10:50,380 INFO L231 Difference]: Finished difference. Result has 486 places, 686 transitions, 9198 flow [2024-06-28 03:10:50,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8915, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9198, PETRI_PLACES=486, PETRI_TRANSITIONS=686} [2024-06-28 03:10:50,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-28 03:10:50,380 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 686 transitions, 9198 flow [2024-06-28 03:10:50,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:50,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:50,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:50,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-28 03:10:50,381 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:50,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:50,381 INFO L85 PathProgramCache]: Analyzing trace with hash -530583323, now seen corresponding path program 4 times [2024-06-28 03:10:50,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:50,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154257420] [2024-06-28 03:10:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:50,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:51,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:51,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154257420] [2024-06-28 03:10:51,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154257420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:51,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:51,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:10:51,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911195849] [2024-06-28 03:10:51,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:51,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:10:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:10:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:10:51,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:10:51,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 686 transitions, 9198 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:51,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:51,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:10:51,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:54,097 INFO L124 PetriNetUnfolderBase]: 4729/7634 cut-off events. [2024-06-28 03:10:54,097 INFO L125 PetriNetUnfolderBase]: For 2688466/2688466 co-relation queries the response was YES. [2024-06-28 03:10:54,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91726 conditions, 7634 events. 4729/7634 cut-off events. For 2688466/2688466 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 49598 event pairs, 851 based on Foata normal form. 1/7629 useless extension candidates. Maximal degree in co-relation 91492. Up to 7031 conditions per place. [2024-06-28 03:10:54,242 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 642 selfloop transitions, 61 changer transitions 0/708 dead transitions. [2024-06-28 03:10:54,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 708 transitions, 10783 flow [2024-06-28 03:10:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:10:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:10:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:10:54,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 03:10:54,243 INFO L175 Difference]: Start difference. First operand has 486 places, 686 transitions, 9198 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:10:54,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 708 transitions, 10783 flow [2024-06-28 03:11:06,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 708 transitions, 10528 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-28 03:11:06,303 INFO L231 Difference]: Finished difference. Result has 487 places, 689 transitions, 9199 flow [2024-06-28 03:11:06,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8943, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9199, PETRI_PLACES=487, PETRI_TRANSITIONS=689} [2024-06-28 03:11:06,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 443 predicate places. [2024-06-28 03:11:06,304 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 689 transitions, 9199 flow [2024-06-28 03:11:06,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:06,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:06,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:06,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-28 03:11:06,304 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:06,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:06,305 INFO L85 PathProgramCache]: Analyzing trace with hash -530381296, now seen corresponding path program 3 times [2024-06-28 03:11:06,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:06,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896644201] [2024-06-28 03:11:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:07,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:07,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896644201] [2024-06-28 03:11:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896644201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:07,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:11:07,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567114215] [2024-06-28 03:11:07,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:07,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:11:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:11:07,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:11:07,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:11:07,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 689 transitions, 9199 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:07,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:07,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:11:07,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:10,055 INFO L124 PetriNetUnfolderBase]: 4749/7666 cut-off events. [2024-06-28 03:11:10,055 INFO L125 PetriNetUnfolderBase]: For 2763781/2763781 co-relation queries the response was YES. [2024-06-28 03:11:10,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92336 conditions, 7666 events. 4749/7666 cut-off events. For 2763781/2763781 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 49898 event pairs, 855 based on Foata normal form. 4/7664 useless extension candidates. Maximal degree in co-relation 92101. Up to 6908 conditions per place. [2024-06-28 03:11:10,205 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 623 selfloop transitions, 88 changer transitions 0/716 dead transitions. [2024-06-28 03:11:10,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 716 transitions, 10943 flow [2024-06-28 03:11:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:11:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:11:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 03:11:10,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-28 03:11:10,206 INFO L175 Difference]: Start difference. First operand has 487 places, 689 transitions, 9199 flow. Second operand 9 states and 174 transitions. [2024-06-28 03:11:10,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 716 transitions, 10943 flow Killed by 15