./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.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/protection/safe028_rmo.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/safe028_rmo.i ./goblint.2024-06-19_11-23-25.files/protection/safe028_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:32:45,814 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:32:45,895 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:32:45,914 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:32:45,914 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:32:45,935 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:32:45,935 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:32:45,936 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:32:45,936 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:32:45,939 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:32:45,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:32:45,940 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:32:45,940 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:32:45,941 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:32:45,941 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:32:45,942 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:32:45,942 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:32:45,942 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:32:45,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:32:45,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:32:45,943 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:32:45,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:32:45,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:32:45,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:32:45,944 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:32:45,944 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:32:45,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:32:45,944 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:32:45,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:32:45,945 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:32:45,946 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:32:45,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:32:45,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:32:45,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:32:45,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:32:45,947 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:32:45,947 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:32:45,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:32:45,947 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:32:45,947 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:32:45,947 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:32:45,948 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:32:45,948 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:32:45,948 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:32:46,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:32:46,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:32:46,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:32:46,163 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:32:46,163 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:32:46,164 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe028_rmo.yml/witness.yml [2024-06-27 21:32:46,386 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:32:46,387 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:32:46,387 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-27 21:32:47,483 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:32:47,747 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:32:47,747 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-27 21:32:47,767 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac19970fb/3b74ed3a22d2433bb2d7f69b6c61cd09/FLAG0f42364ea [2024-06-27 21:32:47,782 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac19970fb/3b74ed3a22d2433bb2d7f69b6c61cd09 [2024-06-27 21:32:47,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:32:47,784 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:32:47,786 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:32:47,786 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:32:47,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:32:47,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:32:46" (1/2) ... [2024-06-27 21:32:47,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5afcefa4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:47, skipping insertion in model container [2024-06-27 21:32:47,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:32:46" (1/2) ... [2024-06-27 21:32:47,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59c8a947 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:47, skipping insertion in model container [2024-06-27 21:32:47,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:32:47" (2/2) ... [2024-06-27 21:32:47,794 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5afcefa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:47, skipping insertion in model container [2024-06-27 21:32:47,794 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:32:47" (2/2) ... [2024-06-27 21:32:47,795 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:32:47,917 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:32:47,918 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-27 21:32:47,919 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-27 21:32:47,919 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-27 21:32:47,919 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:32:47,920 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-27 21:32:47,956 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:32:48,226 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:32:48,238 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:32:48,383 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:32:48,409 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:32:48,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48 WrapperNode [2024-06-27 21:32:48,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:32:48,411 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:32:48,411 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:32:48,411 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:32:48,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,461 INFO L138 Inliner]: procedures = 175, calls = 76, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 172 [2024-06-27 21:32:48,462 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:32:48,462 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:32:48,462 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:32:48,462 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:32:48,471 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,474 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,491 INFO L175 MemorySlicer]: Split 35 memory accesses to 2 slices as follows [2, 33]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-27 21:32:48,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,491 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,501 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,502 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,504 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,506 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,510 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:32:48,510 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:32:48,510 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:32:48,510 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:32:48,521 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (1/1) ... [2024-06-27 21:32:48,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:32:48,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:32:48,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:32:48,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:32:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:32:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:32:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:32:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:32:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:32:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:32:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:32:48,592 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:32:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:32:48,593 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:32:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:32:48,593 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:32:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:32:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:32:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:32:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:32:48,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:32:48,596 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:32:48,747 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:32:48,748 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:32:49,249 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:32:49,250 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:32:49,441 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:32:49,441 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:32:49,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:32:49 BoogieIcfgContainer [2024-06-27 21:32:49,441 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:32:49,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:32:49,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:32:49,445 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:32:49,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:32:46" (1/4) ... [2024-06-27 21:32:49,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754efeff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:32:49, skipping insertion in model container [2024-06-27 21:32:49,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:32:47" (2/4) ... [2024-06-27 21:32:49,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754efeff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:32:49, skipping insertion in model container [2024-06-27 21:32:49,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:48" (3/4) ... [2024-06-27 21:32:49,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754efeff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:32:49, skipping insertion in model container [2024-06-27 21:32:49,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:32:49" (4/4) ... [2024-06-27 21:32:49,448 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_rmo.i [2024-06-27 21:32:49,492 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:32:49,492 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:32:49,492 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:32:49,532 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:32:49,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:32:49,575 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 21:32:49,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:32:49,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:32:49,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:32:49,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 21:32:49,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:32:49,627 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;@486ae851, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:32:49,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:32:49,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:32:49,632 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 21:32:49,632 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:32:49,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:49,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:32:49,633 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)] === [2024-06-27 21:32:49,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:49,637 INFO L85 PathProgramCache]: Analyzing trace with hash 690552342, now seen corresponding path program 1 times [2024-06-27 21:32:49,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:49,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759338609] [2024-06-27 21:32:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:49,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:51,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:51,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759338609] [2024-06-27 21:32:51,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759338609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:51,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:51,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:32:51,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909087114] [2024-06-27 21:32:51,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:51,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:32:51,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:32:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:32:51,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 21:32:51,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:51,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:51,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 21:32:51,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:51,620 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-27 21:32:51,620 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 21:32:51,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7678 event pairs, 650 based on Foata normal form. 1/1558 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-27 21:32:51,631 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 21:32:51,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-27 21:32:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:32:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:32:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-27 21:32:51,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-27 21:32:51,641 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-27 21:32:51,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-27 21:32:51,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:32:51,645 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 21:32:51,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 21:32:51,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 21:32:51,649 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 21:32:51,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:51,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:51,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:51,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:32:51,650 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)] === [2024-06-27 21:32:51,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2099091499, now seen corresponding path program 1 times [2024-06-27 21:32:51,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:51,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350921425] [2024-06-27 21:32:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:51,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:53,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:53,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350921425] [2024-06-27 21:32:53,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350921425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:53,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:53,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:32:53,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937966342] [2024-06-27 21:32:53,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:53,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:32:53,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:53,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:32:53,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:32:53,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:32:53,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:53,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:53,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:32:53,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:53,626 INFO L124 PetriNetUnfolderBase]: 1148/1764 cut-off events. [2024-06-27 21:32:53,627 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-27 21:32:53,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1764 events. 1148/1764 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8292 event pairs, 521 based on Foata normal form. 6/1769 useless extension candidates. Maximal degree in co-relation 4046. Up to 1692 conditions per place. [2024-06-27 21:32:53,635 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-27 21:32:53,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-27 21:32:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:32:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:32:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-27 21:32:53,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 21:32:53,637 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-27 21:32:53,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-27 21:32:53,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:32:53,639 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 21:32:53,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 21:32:53,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 21:32:53,640 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 21:32:53,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:53,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:53,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:53,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:32:53,641 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)] === [2024-06-27 21:32:53,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:53,641 INFO L85 PathProgramCache]: Analyzing trace with hash -77203629, now seen corresponding path program 1 times [2024-06-27 21:32:53,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:53,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212585321] [2024-06-27 21:32:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:56,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:56,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212585321] [2024-06-27 21:32:56,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212585321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:56,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:56,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:32:56,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681973170] [2024-06-27 21:32:56,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:56,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:32:56,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:56,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:32:56,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:32:56,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:32:56,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:56,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:56,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:32:56,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:57,057 INFO L124 PetriNetUnfolderBase]: 1139/1749 cut-off events. [2024-06-27 21:32:57,058 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-27 21:32:57,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 1749 events. 1139/1749 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8185 event pairs, 375 based on Foata normal form. 6/1754 useless extension candidates. Maximal degree in co-relation 4479. Up to 1639 conditions per place. [2024-06-27 21:32:57,065 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-27 21:32:57,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 380 flow [2024-06-27 21:32:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-27 21:32:57,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-27 21:32:57,068 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 127 transitions. [2024-06-27 21:32:57,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 380 flow [2024-06-27 21:32:57,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:32:57,070 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-27 21:32:57,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 21:32:57,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-27 21:32:57,071 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-27 21:32:57,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:57,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:57,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:57,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:32:57,072 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:57,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:57,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1661019617, now seen corresponding path program 1 times [2024-06-27 21:32:57,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:57,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611661970] [2024-06-27 21:32:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:57,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:58,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:58,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611661970] [2024-06-27 21:32:58,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611661970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:58,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:58,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:32:58,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714951729] [2024-06-27 21:32:58,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:58,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:32:58,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:58,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:32:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:32:58,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:32:58,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:58,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:58,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:32:58,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:59,104 INFO L124 PetriNetUnfolderBase]: 959/1558 cut-off events. [2024-06-27 21:32:59,104 INFO L125 PetriNetUnfolderBase]: For 1579/1579 co-relation queries the response was YES. [2024-06-27 21:32:59,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4320 conditions, 1558 events. 959/1558 cut-off events. For 1579/1579 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7562 event pairs, 367 based on Foata normal form. 4/1561 useless extension candidates. Maximal degree in co-relation 4303. Up to 1434 conditions per place. [2024-06-27 21:32:59,111 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-27 21:32:59,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 341 flow [2024-06-27 21:32:59,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:32:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:32:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-27 21:32:59,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-27 21:32:59,114 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 94 transitions. [2024-06-27 21:32:59,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 341 flow [2024-06-27 21:32:59,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 314 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:32:59,118 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-27 21:32:59,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 21:32:59,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-27 21:32:59,120 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-27 21:32:59,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:59,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:59,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:59,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:32:59,121 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)] === [2024-06-27 21:32:59,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash 434961164, now seen corresponding path program 1 times [2024-06-27 21:32:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:59,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336436255] [2024-06-27 21:32:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:59,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:00,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:00,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336436255] [2024-06-27 21:33:00,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336436255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:00,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:00,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:33:00,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391379816] [2024-06-27 21:33:00,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:00,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:33:00,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:00,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:33:00,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:33:00,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:00,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:00,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:00,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:00,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:01,879 INFO L124 PetriNetUnfolderBase]: 1155/1787 cut-off events. [2024-06-27 21:33:01,879 INFO L125 PetriNetUnfolderBase]: For 2718/2720 co-relation queries the response was YES. [2024-06-27 21:33:01,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 1787 events. 1155/1787 cut-off events. For 2718/2720 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8352 event pairs, 420 based on Foata normal form. 6/1792 useless extension candidates. Maximal degree in co-relation 5411. Up to 1642 conditions per place. [2024-06-27 21:33:01,888 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-27 21:33:01,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 466 flow [2024-06-27 21:33:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:33:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:33:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 21:33:01,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 21:33:01,893 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 116 transitions. [2024-06-27 21:33:01,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 466 flow [2024-06-27 21:33:01,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 446 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:33:01,900 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 260 flow [2024-06-27 21:33:01,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-27 21:33:01,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-27 21:33:01,902 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 260 flow [2024-06-27 21:33:01,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:01,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:01,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:01,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:33:01,903 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)] === [2024-06-27 21:33:01,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1522867724, now seen corresponding path program 2 times [2024-06-27 21:33:01,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:01,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403732315] [2024-06-27 21:33:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:01,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:03,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:03,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403732315] [2024-06-27 21:33:03,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403732315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:03,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:03,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:33:03,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715820081] [2024-06-27 21:33:03,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:03,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:33:03,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:03,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:33:03,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:33:03,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:03,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:03,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:03,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:03,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:04,382 INFO L124 PetriNetUnfolderBase]: 1145/1764 cut-off events. [2024-06-27 21:33:04,383 INFO L125 PetriNetUnfolderBase]: For 3870/3870 co-relation queries the response was YES. [2024-06-27 21:33:04,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5819 conditions, 1764 events. 1145/1764 cut-off events. For 3870/3870 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8279 event pairs, 419 based on Foata normal form. 4/1766 useless extension candidates. Maximal degree in co-relation 5799. Up to 1634 conditions per place. [2024-06-27 21:33:04,390 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-27 21:33:04,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 446 flow [2024-06-27 21:33:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:33:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:33:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 21:33:04,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-27 21:33:04,393 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 260 flow. Second operand 6 states and 109 transitions. [2024-06-27 21:33:04,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 446 flow [2024-06-27 21:33:04,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 416 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 21:33:04,397 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 270 flow [2024-06-27 21:33:04,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-27 21:33:04,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 21:33:04,400 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 270 flow [2024-06-27 21:33:04,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:04,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:04,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:04,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:33:04,400 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)] === [2024-06-27 21:33:04,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:04,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1488021182, now seen corresponding path program 1 times [2024-06-27 21:33:04,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:04,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867247396] [2024-06-27 21:33:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:04,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:06,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:06,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867247396] [2024-06-27 21:33:06,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867247396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:06,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:06,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:33:06,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749813660] [2024-06-27 21:33:06,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:06,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:33:06,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:06,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:33:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:33:07,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:33:07,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:07,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:07,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:33:07,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:07,796 INFO L124 PetriNetUnfolderBase]: 967/1578 cut-off events. [2024-06-27 21:33:07,796 INFO L125 PetriNetUnfolderBase]: For 3797/3797 co-relation queries the response was YES. [2024-06-27 21:33:07,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5179 conditions, 1578 events. 967/1578 cut-off events. For 3797/3797 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7670 event pairs, 333 based on Foata normal form. 4/1581 useless extension candidates. Maximal degree in co-relation 5157. Up to 1424 conditions per place. [2024-06-27 21:33:07,805 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 59 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-27 21:33:07,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 476 flow [2024-06-27 21:33:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:33:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:33:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 21:33:07,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 21:33:07,806 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 270 flow. Second operand 6 states and 111 transitions. [2024-06-27 21:33:07,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 476 flow [2024-06-27 21:33:07,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 432 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:07,810 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 275 flow [2024-06-27 21:33:07,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-27 21:33:07,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 21:33:07,811 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 275 flow [2024-06-27 21:33:07,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:07,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:07,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:07,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:33:07,812 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)] === [2024-06-27 21:33:07,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:07,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1466410827, now seen corresponding path program 1 times [2024-06-27 21:33:07,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:07,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898065720] [2024-06-27 21:33:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:07,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:10,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:10,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898065720] [2024-06-27 21:33:10,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898065720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:10,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:10,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:33:10,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753786604] [2024-06-27 21:33:10,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:10,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:33:10,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:10,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:33:10,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:33:10,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:10,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 275 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:10,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:10,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:10,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:11,060 INFO L124 PetriNetUnfolderBase]: 1163/1809 cut-off events. [2024-06-27 21:33:11,060 INFO L125 PetriNetUnfolderBase]: For 5837/5837 co-relation queries the response was YES. [2024-06-27 21:33:11,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6236 conditions, 1809 events. 1163/1809 cut-off events. For 5837/5837 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8573 event pairs, 436 based on Foata normal form. 4/1812 useless extension candidates. Maximal degree in co-relation 6214. Up to 1691 conditions per place. [2024-06-27 21:33:11,072 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-27 21:33:11,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 549 flow [2024-06-27 21:33:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:33:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:33:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:33:11,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 21:33:11,076 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 275 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:33:11,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 549 flow [2024-06-27 21:33:11,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 518 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:11,080 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 310 flow [2024-06-27 21:33:11,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-27 21:33:11,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-27 21:33:11,082 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 310 flow [2024-06-27 21:33:11,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:11,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:11,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:11,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:33:11,083 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)] === [2024-06-27 21:33:11,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:11,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1466290857, now seen corresponding path program 2 times [2024-06-27 21:33:11,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:11,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029454681] [2024-06-27 21:33:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:11,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:13,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:13,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029454681] [2024-06-27 21:33:13,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029454681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:13,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:13,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:33:13,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339099924] [2024-06-27 21:33:13,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:13,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:33:13,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:13,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:33:13,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:33:13,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:13,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:13,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:13,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:13,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:14,273 INFO L124 PetriNetUnfolderBase]: 1189/1861 cut-off events. [2024-06-27 21:33:14,273 INFO L125 PetriNetUnfolderBase]: For 7663/7667 co-relation queries the response was YES. [2024-06-27 21:33:14,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6806 conditions, 1861 events. 1189/1861 cut-off events. For 7663/7667 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8913 event pairs, 380 based on Foata normal form. 8/1868 useless extension candidates. Maximal degree in co-relation 6783. Up to 1595 conditions per place. [2024-06-27 21:33:14,281 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-27 21:33:14,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 97 transitions, 666 flow [2024-06-27 21:33:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:33:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:33:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 21:33:14,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 21:33:14,283 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 310 flow. Second operand 7 states and 135 transitions. [2024-06-27 21:33:14,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 97 transitions, 666 flow [2024-06-27 21:33:14,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 624 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:14,288 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 394 flow [2024-06-27 21:33:14,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-27 21:33:14,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-27 21:33:14,289 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 394 flow [2024-06-27 21:33:14,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:14,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:14,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:14,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:33:14,290 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)] === [2024-06-27 21:33:14,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1461642283, now seen corresponding path program 1 times [2024-06-27 21:33:14,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:14,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482023990] [2024-06-27 21:33:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:14,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:16,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:16,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482023990] [2024-06-27 21:33:16,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482023990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:16,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:16,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:16,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973655462] [2024-06-27 21:33:16,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:16,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:16,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:16,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:16,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:16,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:16,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 394 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:16,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:16,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:16,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:18,068 INFO L124 PetriNetUnfolderBase]: 1209/1893 cut-off events. [2024-06-27 21:33:18,068 INFO L125 PetriNetUnfolderBase]: For 9939/9943 co-relation queries the response was YES. [2024-06-27 21:33:18,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7360 conditions, 1893 events. 1209/1893 cut-off events. For 9939/9943 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9113 event pairs, 391 based on Foata normal form. 8/1900 useless extension candidates. Maximal degree in co-relation 7336. Up to 1708 conditions per place. [2024-06-27 21:33:18,080 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 74 selfloop transitions, 18 changer transitions 0/97 dead transitions. [2024-06-27 21:33:18,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 676 flow [2024-06-27 21:33:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:33:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:33:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:33:18,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 21:33:18,082 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 394 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:33:18,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 676 flow [2024-06-27 21:33:18,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 636 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:33:18,090 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 423 flow [2024-06-27 21:33:18,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=423, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-27 21:33:18,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-27 21:33:18,090 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 423 flow [2024-06-27 21:33:18,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:18,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:18,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:18,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:33:18,091 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)] === [2024-06-27 21:33:18,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1107933109, now seen corresponding path program 3 times [2024-06-27 21:33:18,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:18,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158792498] [2024-06-27 21:33:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:18,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:20,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:20,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158792498] [2024-06-27 21:33:20,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158792498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:20,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:20,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:33:20,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123448966] [2024-06-27 21:33:20,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:20,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:33:20,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:20,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:33:20,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:33:20,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:20,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 423 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:20,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:20,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:20,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:21,476 INFO L124 PetriNetUnfolderBase]: 1199/1863 cut-off events. [2024-06-27 21:33:21,476 INFO L125 PetriNetUnfolderBase]: For 11488/11488 co-relation queries the response was YES. [2024-06-27 21:33:21,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7568 conditions, 1863 events. 1199/1863 cut-off events. For 11488/11488 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8911 event pairs, 392 based on Foata normal form. 4/1864 useless extension candidates. Maximal degree in co-relation 7542. Up to 1619 conditions per place. [2024-06-27 21:33:21,484 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 61 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-27 21:33:21,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 661 flow [2024-06-27 21:33:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:33:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:33:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:33:21,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 21:33:21,486 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 423 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:33:21,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 661 flow [2024-06-27 21:33:21,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 594 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:21,494 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 416 flow [2024-06-27 21:33:21,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-06-27 21:33:21,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-27 21:33:21,494 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 416 flow [2024-06-27 21:33:21,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:21,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:21,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:21,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:33:21,495 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)] === [2024-06-27 21:33:21,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:21,495 INFO L85 PathProgramCache]: Analyzing trace with hash -244063827, now seen corresponding path program 2 times [2024-06-27 21:33:21,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:21,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369049351] [2024-06-27 21:33:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:21,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:24,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:24,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369049351] [2024-06-27 21:33:24,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369049351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:24,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:24,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:24,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305557108] [2024-06-27 21:33:24,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:24,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:24,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:24,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:24,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:24,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:24,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 416 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:24,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:24,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:24,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:25,167 INFO L124 PetriNetUnfolderBase]: 1219/1914 cut-off events. [2024-06-27 21:33:25,167 INFO L125 PetriNetUnfolderBase]: For 13028/13028 co-relation queries the response was YES. [2024-06-27 21:33:25,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7847 conditions, 1914 events. 1219/1914 cut-off events. For 13028/13028 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9236 event pairs, 398 based on Foata normal form. 4/1916 useless extension candidates. Maximal degree in co-relation 7820. Up to 1726 conditions per place. [2024-06-27 21:33:25,205 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 71 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-27 21:33:25,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 684 flow [2024-06-27 21:33:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:33:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:33:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:33:25,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 21:33:25,207 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 416 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:33:25,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 684 flow [2024-06-27 21:33:25,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 616 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:25,220 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 421 flow [2024-06-27 21:33:25,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-06-27 21:33:25,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-27 21:33:25,221 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 421 flow [2024-06-27 21:33:25,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:25,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:25,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:25,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:33:25,222 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:25,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:25,222 INFO L85 PathProgramCache]: Analyzing trace with hash -235723587, now seen corresponding path program 3 times [2024-06-27 21:33:25,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:25,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584894695] [2024-06-27 21:33:25,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:25,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:28,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:28,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584894695] [2024-06-27 21:33:28,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584894695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:28,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:28,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:28,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061970343] [2024-06-27 21:33:28,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:28,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:28,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:28,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:28,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:28,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:28,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 421 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:28,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:28,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:28,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:28,975 INFO L124 PetriNetUnfolderBase]: 1211/1902 cut-off events. [2024-06-27 21:33:28,975 INFO L125 PetriNetUnfolderBase]: For 14745/14745 co-relation queries the response was YES. [2024-06-27 21:33:28,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7954 conditions, 1902 events. 1211/1902 cut-off events. For 14745/14745 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9247 event pairs, 366 based on Foata normal form. 4/1904 useless extension candidates. Maximal degree in co-relation 7926. Up to 1642 conditions per place. [2024-06-27 21:33:28,987 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 23 changer transitions 0/96 dead transitions. [2024-06-27 21:33:28,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 697 flow [2024-06-27 21:33:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:33:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:33:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:33:29,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 21:33:29,005 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 421 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:33:29,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 697 flow [2024-06-27 21:33:29,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 642 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:29,016 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 453 flow [2024-06-27 21:33:29,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=453, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-27 21:33:29,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-27 21:33:29,016 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 453 flow [2024-06-27 21:33:29,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:29,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:29,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:29,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:33:29,017 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:29,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1436695505, now seen corresponding path program 1 times [2024-06-27 21:33:29,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:29,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442887713] [2024-06-27 21:33:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:29,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:30,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442887713] [2024-06-27 21:33:30,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442887713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:30,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:30,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:33:30,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226009157] [2024-06-27 21:33:30,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:30,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:33:30,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:30,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:33:30,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:33:30,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:33:30,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:30,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:30,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:33:30,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:31,351 INFO L124 PetriNetUnfolderBase]: 1035/1716 cut-off events. [2024-06-27 21:33:31,352 INFO L125 PetriNetUnfolderBase]: For 13495/13495 co-relation queries the response was YES. [2024-06-27 21:33:31,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7146 conditions, 1716 events. 1035/1716 cut-off events. For 13495/13495 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8549 event pairs, 357 based on Foata normal form. 2/1717 useless extension candidates. Maximal degree in co-relation 7117. Up to 1568 conditions per place. [2024-06-27 21:33:31,370 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 69 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-06-27 21:33:31,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 651 flow [2024-06-27 21:33:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:33:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:33:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 21:33:31,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 21:33:31,371 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 453 flow. Second operand 5 states and 89 transitions. [2024-06-27 21:33:31,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 651 flow [2024-06-27 21:33:31,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 582 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:31,382 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 430 flow [2024-06-27 21:33:31,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=430, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-06-27 21:33:31,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-27 21:33:31,383 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 430 flow [2024-06-27 21:33:31,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:31,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:31,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:31,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:33:31,384 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)] === [2024-06-27 21:33:31,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:31,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1644918040, now seen corresponding path program 1 times [2024-06-27 21:33:31,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:31,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641496227] [2024-06-27 21:33:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:31,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:33,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641496227] [2024-06-27 21:33:33,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641496227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:33,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:33,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:33,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656835958] [2024-06-27 21:33:33,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:33,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:33,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:33,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:33,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:33,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:33,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 430 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:33,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:33,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:33,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:35,270 INFO L124 PetriNetUnfolderBase]: 1394/2217 cut-off events. [2024-06-27 21:33:35,271 INFO L125 PetriNetUnfolderBase]: For 23090/23090 co-relation queries the response was YES. [2024-06-27 21:33:35,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9916 conditions, 2217 events. 1394/2217 cut-off events. For 23090/23090 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11242 event pairs, 374 based on Foata normal form. 16/2232 useless extension candidates. Maximal degree in co-relation 9886. Up to 1733 conditions per place. [2024-06-27 21:33:35,283 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 105 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2024-06-27 21:33:35,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 128 transitions, 926 flow [2024-06-27 21:33:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:33:35,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 21:33:35,306 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 430 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:33:35,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 128 transitions, 926 flow [2024-06-27 21:33:35,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 128 transitions, 902 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 21:33:35,319 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 498 flow [2024-06-27 21:33:35,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=498, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2024-06-27 21:33:35,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-27 21:33:35,321 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 498 flow [2024-06-27 21:33:35,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:35,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:35,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:35,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:33:35,322 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)] === [2024-06-27 21:33:35,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:35,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1644857590, now seen corresponding path program 2 times [2024-06-27 21:33:35,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:35,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701538837] [2024-06-27 21:33:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:35,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:37,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:37,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701538837] [2024-06-27 21:33:37,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701538837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:37,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:37,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:37,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558091435] [2024-06-27 21:33:37,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:37,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:37,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:37,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:37,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:37,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:37,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 498 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:37,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:37,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:37,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:39,091 INFO L124 PetriNetUnfolderBase]: 1358/2161 cut-off events. [2024-06-27 21:33:39,091 INFO L125 PetriNetUnfolderBase]: For 23998/23998 co-relation queries the response was YES. [2024-06-27 21:33:39,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9647 conditions, 2161 events. 1358/2161 cut-off events. For 23998/23998 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10845 event pairs, 467 based on Foata normal form. 20/2180 useless extension candidates. Maximal degree in co-relation 9616. Up to 1873 conditions per place. [2024-06-27 21:33:39,101 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 97 selfloop transitions, 15 changer transitions 0/117 dead transitions. [2024-06-27 21:33:39,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 838 flow [2024-06-27 21:33:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:39,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:33:39,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 21:33:39,103 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 498 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:33:39,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 838 flow [2024-06-27 21:33:39,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 117 transitions, 796 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:39,120 INFO L231 Difference]: Finished difference. Result has 82 places, 74 transitions, 493 flow [2024-06-27 21:33:39,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=493, PETRI_PLACES=82, PETRI_TRANSITIONS=74} [2024-06-27 21:33:39,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 21:33:39,121 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 74 transitions, 493 flow [2024-06-27 21:33:39,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:39,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:39,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:39,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:33:39,122 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)] === [2024-06-27 21:33:39,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:39,122 INFO L85 PathProgramCache]: Analyzing trace with hash -356206442, now seen corresponding path program 3 times [2024-06-27 21:33:39,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:39,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648135014] [2024-06-27 21:33:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:39,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:41,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:41,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648135014] [2024-06-27 21:33:41,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648135014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:41,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:41,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:41,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732989002] [2024-06-27 21:33:41,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:41,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:41,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:41,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:41,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 74 transitions, 493 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:41,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:41,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:41,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:42,806 INFO L124 PetriNetUnfolderBase]: 1446/2323 cut-off events. [2024-06-27 21:33:42,806 INFO L125 PetriNetUnfolderBase]: For 26885/26889 co-relation queries the response was YES. [2024-06-27 21:33:42,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10323 conditions, 2323 events. 1446/2323 cut-off events. For 26885/26889 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11994 event pairs, 407 based on Foata normal form. 24/2346 useless extension candidates. Maximal degree in co-relation 10290. Up to 1893 conditions per place. [2024-06-27 21:33:42,843 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 85 selfloop transitions, 27 changer transitions 0/117 dead transitions. [2024-06-27 21:33:42,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 117 transitions, 855 flow [2024-06-27 21:33:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:42,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:33:42,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:33:42,845 INFO L175 Difference]: Start difference. First operand has 82 places, 74 transitions, 493 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:33:42,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 117 transitions, 855 flow [2024-06-27 21:33:42,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 117 transitions, 820 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:33:42,858 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 547 flow [2024-06-27 21:33:42,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=547, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2024-06-27 21:33:42,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-27 21:33:42,858 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 547 flow [2024-06-27 21:33:42,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:42,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:42,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:42,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:33:42,859 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)] === [2024-06-27 21:33:42,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:42,859 INFO L85 PathProgramCache]: Analyzing trace with hash -356021992, now seen corresponding path program 1 times [2024-06-27 21:33:42,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:42,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673883647] [2024-06-27 21:33:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:42,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:45,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:45,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673883647] [2024-06-27 21:33:45,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673883647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:45,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:45,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:45,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849649066] [2024-06-27 21:33:45,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:45,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:45,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:45,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:46,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 547 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:46,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:46,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:46,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:47,168 INFO L124 PetriNetUnfolderBase]: 1494/2407 cut-off events. [2024-06-27 21:33:47,168 INFO L125 PetriNetUnfolderBase]: For 29843/29847 co-relation queries the response was YES. [2024-06-27 21:33:47,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10940 conditions, 2407 events. 1494/2407 cut-off events. For 29843/29847 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12655 event pairs, 403 based on Foata normal form. 16/2422 useless extension candidates. Maximal degree in co-relation 10906. Up to 1725 conditions per place. [2024-06-27 21:33:47,197 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 85 selfloop transitions, 30 changer transitions 0/120 dead transitions. [2024-06-27 21:33:47,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 120 transitions, 927 flow [2024-06-27 21:33:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:33:47,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 21:33:47,203 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 547 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:33:47,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 120 transitions, 927 flow [2024-06-27 21:33:47,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 120 transitions, 862 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:47,250 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 578 flow [2024-06-27 21:33:47,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=578, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-06-27 21:33:47,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-27 21:33:47,251 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 578 flow [2024-06-27 21:33:47,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:47,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:47,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:47,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:33:47,251 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:47,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:47,252 INFO L85 PathProgramCache]: Analyzing trace with hash 610900818, now seen corresponding path program 1 times [2024-06-27 21:33:47,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:47,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987978072] [2024-06-27 21:33:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:47,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:49,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987978072] [2024-06-27 21:33:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987978072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:49,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:49,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:33:49,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274625740] [2024-06-27 21:33:49,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:49,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:33:49,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:49,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:33:49,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:33:49,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:49,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 578 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-27 21:33:49,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:49,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:49,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:50,107 INFO L124 PetriNetUnfolderBase]: 1504/2411 cut-off events. [2024-06-27 21:33:50,107 INFO L125 PetriNetUnfolderBase]: For 30392/30392 co-relation queries the response was YES. [2024-06-27 21:33:50,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11087 conditions, 2411 events. 1504/2411 cut-off events. For 30392/30392 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12656 event pairs, 512 based on Foata normal form. 2/2412 useless extension candidates. Maximal degree in co-relation 11052. Up to 2267 conditions per place. [2024-06-27 21:33:50,118 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 84 selfloop transitions, 18 changer transitions 0/107 dead transitions. [2024-06-27 21:33:50,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 936 flow [2024-06-27 21:33:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:33:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:33:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 21:33:50,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-27 21:33:50,120 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 578 flow. Second operand 6 states and 109 transitions. [2024-06-27 21:33:50,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 936 flow [2024-06-27 21:33:50,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 107 transitions, 858 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:50,137 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 609 flow [2024-06-27 21:33:50,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=609, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2024-06-27 21:33:50,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-27 21:33:50,137 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 609 flow [2024-06-27 21:33:50,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-27 21:33:50,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:50,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:50,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:33:50,138 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)] === [2024-06-27 21:33:50,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:50,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1449579356, now seen corresponding path program 4 times [2024-06-27 21:33:50,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:50,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127774745] [2024-06-27 21:33:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:50,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:52,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:52,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127774745] [2024-06-27 21:33:52,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127774745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:52,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:52,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:52,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774078515] [2024-06-27 21:33:52,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:52,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:52,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:52,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:52,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:52,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:52,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 609 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:52,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:52,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:52,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:54,034 INFO L124 PetriNetUnfolderBase]: 1536/2481 cut-off events. [2024-06-27 21:33:54,034 INFO L125 PetriNetUnfolderBase]: For 34785/34785 co-relation queries the response was YES. [2024-06-27 21:33:54,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11404 conditions, 2481 events. 1536/2481 cut-off events. For 34785/34785 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13240 event pairs, 446 based on Foata normal form. 20/2498 useless extension candidates. Maximal degree in co-relation 11367. Up to 2051 conditions per place. [2024-06-27 21:33:54,045 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 91 selfloop transitions, 27 changer transitions 0/123 dead transitions. [2024-06-27 21:33:54,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 123 transitions, 977 flow [2024-06-27 21:33:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:33:54,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:33:54,049 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 609 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:33:54,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 123 transitions, 977 flow [2024-06-27 21:33:54,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 961 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 21:33:54,090 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 686 flow [2024-06-27 21:33:54,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=686, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2024-06-27 21:33:54,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-27 21:33:54,091 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 686 flow [2024-06-27 21:33:54,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-27 21:33:54,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:54,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:54,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:33:54,091 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:54,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:54,092 INFO L85 PathProgramCache]: Analyzing trace with hash -268382486, now seen corresponding path program 2 times [2024-06-27 21:33:54,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:54,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542570320] [2024-06-27 21:33:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:54,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:56,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:56,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542570320] [2024-06-27 21:33:56,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542570320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:56,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:56,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:56,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209718780] [2024-06-27 21:33:56,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:56,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:56,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:56,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:56,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:57,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:57,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 686 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:57,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:57,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:57,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:58,174 INFO L124 PetriNetUnfolderBase]: 1584/2577 cut-off events. [2024-06-27 21:33:58,175 INFO L125 PetriNetUnfolderBase]: For 38282/38282 co-relation queries the response was YES. [2024-06-27 21:33:58,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12151 conditions, 2577 events. 1584/2577 cut-off events. For 38282/38282 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13952 event pairs, 446 based on Foata normal form. 12/2586 useless extension candidates. Maximal degree in co-relation 12111. Up to 2029 conditions per place. [2024-06-27 21:33:58,187 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 92 selfloop transitions, 29 changer transitions 0/126 dead transitions. [2024-06-27 21:33:58,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 126 transitions, 1074 flow [2024-06-27 21:33:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:33:58,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 21:33:58,189 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 686 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:33:58,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 126 transitions, 1074 flow [2024-06-27 21:33:58,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 126 transitions, 1005 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:58,213 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 715 flow [2024-06-27 21:33:58,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=715, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2024-06-27 21:33:58,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-27 21:33:58,213 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 715 flow [2024-06-27 21:33:58,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:58,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:58,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:58,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:33:58,214 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)] === [2024-06-27 21:33:58,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:58,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1102931644, now seen corresponding path program 3 times [2024-06-27 21:33:58,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:58,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294497844] [2024-06-27 21:33:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:58,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:01,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:01,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294497844] [2024-06-27 21:34:01,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294497844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:01,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:01,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:01,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055392537] [2024-06-27 21:34:01,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:01,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:01,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:01,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:01,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:01,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 715 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:01,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:01,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:01,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:02,354 INFO L124 PetriNetUnfolderBase]: 1564/2545 cut-off events. [2024-06-27 21:34:02,354 INFO L125 PetriNetUnfolderBase]: For 37553/37553 co-relation queries the response was YES. [2024-06-27 21:34:02,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11754 conditions, 2545 events. 1564/2545 cut-off events. For 37553/37553 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13775 event pairs, 393 based on Foata normal form. 12/2554 useless extension candidates. Maximal degree in co-relation 11713. Up to 1465 conditions per place. [2024-06-27 21:34:02,367 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 36 changer transitions 0/125 dead transitions. [2024-06-27 21:34:02,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 125 transitions, 1029 flow [2024-06-27 21:34:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:34:02,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:34:02,369 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 715 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:34:02,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 125 transitions, 1029 flow [2024-06-27 21:34:02,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 125 transitions, 949 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:02,392 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 671 flow [2024-06-27 21:34:02,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=671, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2024-06-27 21:34:02,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-27 21:34:02,393 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 671 flow [2024-06-27 21:34:02,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:02,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:02,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:02,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:34:02,394 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:02,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash 622328658, now seen corresponding path program 2 times [2024-06-27 21:34:02,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:02,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189203709] [2024-06-27 21:34:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:02,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:04,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:04,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189203709] [2024-06-27 21:34:04,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189203709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:04,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:04,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:04,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7100036] [2024-06-27 21:34:04,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:04,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:04,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:04,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:04,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:04,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 671 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-27 21:34:04,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:04,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:04,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:05,289 INFO L124 PetriNetUnfolderBase]: 1558/2537 cut-off events. [2024-06-27 21:34:05,289 INFO L125 PetriNetUnfolderBase]: For 37046/37046 co-relation queries the response was YES. [2024-06-27 21:34:05,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11753 conditions, 2537 events. 1558/2537 cut-off events. For 37046/37046 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13751 event pairs, 542 based on Foata normal form. 2/2536 useless extension candidates. Maximal degree in co-relation 11711. Up to 2374 conditions per place. [2024-06-27 21:34:05,361 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 76 selfloop transitions, 18 changer transitions 0/99 dead transitions. [2024-06-27 21:34:05,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 99 transitions, 905 flow [2024-06-27 21:34:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 21:34:05,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:34:05,363 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 671 flow. Second operand 6 states and 100 transitions. [2024-06-27 21:34:05,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 99 transitions, 905 flow [2024-06-27 21:34:05,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 99 transitions, 791 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 21:34:05,391 INFO L231 Difference]: Finished difference. Result has 95 places, 86 transitions, 599 flow [2024-06-27 21:34:05,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=599, PETRI_PLACES=95, PETRI_TRANSITIONS=86} [2024-06-27 21:34:05,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-27 21:34:05,392 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 86 transitions, 599 flow [2024-06-27 21:34:05,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-27 21:34:05,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:05,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:05,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:34:05,393 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:05,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:05,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1243555678, now seen corresponding path program 1 times [2024-06-27 21:34:05,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:05,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934649021] [2024-06-27 21:34:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:05,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:07,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:07,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934649021] [2024-06-27 21:34:07,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934649021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:07,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:07,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:07,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230264082] [2024-06-27 21:34:07,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:07,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:07,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:07,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:07,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:07,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:34:07,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 86 transitions, 599 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:07,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:07,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:34:07,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:08,184 INFO L124 PetriNetUnfolderBase]: 1485/2489 cut-off events. [2024-06-27 21:34:08,185 INFO L125 PetriNetUnfolderBase]: For 32701/32701 co-relation queries the response was YES. [2024-06-27 21:34:08,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10795 conditions, 2489 events. 1485/2489 cut-off events. For 32701/32701 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13988 event pairs, 420 based on Foata normal form. 4/2483 useless extension candidates. Maximal degree in co-relation 10753. Up to 2237 conditions per place. [2024-06-27 21:34:08,199 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 86 selfloop transitions, 18 changer transitions 0/113 dead transitions. [2024-06-27 21:34:08,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 113 transitions, 949 flow [2024-06-27 21:34:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:08,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 21:34:08,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:34:08,201 INFO L175 Difference]: Start difference. First operand has 95 places, 86 transitions, 599 flow. Second operand 6 states and 112 transitions. [2024-06-27 21:34:08,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 113 transitions, 949 flow [2024-06-27 21:34:08,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 113 transitions, 910 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:08,227 INFO L231 Difference]: Finished difference. Result has 97 places, 92 transitions, 656 flow [2024-06-27 21:34:08,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=656, PETRI_PLACES=97, PETRI_TRANSITIONS=92} [2024-06-27 21:34:08,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-27 21:34:08,228 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 92 transitions, 656 flow [2024-06-27 21:34:08,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:08,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:08,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:08,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:34:08,228 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:08,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:08,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2025866492, now seen corresponding path program 2 times [2024-06-27 21:34:08,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:08,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861523507] [2024-06-27 21:34:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:08,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:10,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:10,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861523507] [2024-06-27 21:34:10,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861523507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:10,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:10,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:10,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075985018] [2024-06-27 21:34:10,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:10,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:10,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:10,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:10,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:10,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:34:10,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 656 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:10,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:10,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:34:10,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:10,918 INFO L124 PetriNetUnfolderBase]: 1466/2463 cut-off events. [2024-06-27 21:34:10,918 INFO L125 PetriNetUnfolderBase]: For 34485/34485 co-relation queries the response was YES. [2024-06-27 21:34:10,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10906 conditions, 2463 events. 1466/2463 cut-off events. For 34485/34485 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13794 event pairs, 449 based on Foata normal form. 6/2462 useless extension candidates. Maximal degree in co-relation 10863. Up to 2259 conditions per place. [2024-06-27 21:34:10,931 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 84 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2024-06-27 21:34:10,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 106 transitions, 882 flow [2024-06-27 21:34:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 21:34:10,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-27 21:34:10,933 INFO L175 Difference]: Start difference. First operand has 97 places, 92 transitions, 656 flow. Second operand 6 states and 103 transitions. [2024-06-27 21:34:10,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 106 transitions, 882 flow [2024-06-27 21:34:10,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 106 transitions, 844 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 21:34:10,968 INFO L231 Difference]: Finished difference. Result has 101 places, 92 transitions, 651 flow [2024-06-27 21:34:10,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=651, PETRI_PLACES=101, PETRI_TRANSITIONS=92} [2024-06-27 21:34:10,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-27 21:34:10,968 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 92 transitions, 651 flow [2024-06-27 21:34:10,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:10,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:10,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:10,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:34:10,969 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:10,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1758057427, now seen corresponding path program 1 times [2024-06-27 21:34:10,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:10,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956940680] [2024-06-27 21:34:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:10,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:13,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:13,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956940680] [2024-06-27 21:34:13,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956940680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:13,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:13,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:13,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483482516] [2024-06-27 21:34:13,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:13,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:13,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:13,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:13,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:13,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:13,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 92 transitions, 651 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:13,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:13,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:13,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:14,151 INFO L124 PetriNetUnfolderBase]: 1590/2605 cut-off events. [2024-06-27 21:34:14,151 INFO L125 PetriNetUnfolderBase]: For 42734/42734 co-relation queries the response was YES. [2024-06-27 21:34:14,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12012 conditions, 2605 events. 1590/2605 cut-off events. For 42734/42734 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14204 event pairs, 516 based on Foata normal form. 4/2608 useless extension candidates. Maximal degree in co-relation 11967. Up to 2370 conditions per place. [2024-06-27 21:34:14,168 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 95 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-27 21:34:14,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 125 transitions, 1083 flow [2024-06-27 21:34:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:34:14,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:34:14,170 INFO L175 Difference]: Start difference. First operand has 101 places, 92 transitions, 651 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:34:14,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 125 transitions, 1083 flow [2024-06-27 21:34:14,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 125 transitions, 1045 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:14,197 INFO L231 Difference]: Finished difference. Result has 103 places, 98 transitions, 731 flow [2024-06-27 21:34:14,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=731, PETRI_PLACES=103, PETRI_TRANSITIONS=98} [2024-06-27 21:34:14,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-27 21:34:14,199 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 98 transitions, 731 flow [2024-06-27 21:34:14,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:14,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:14,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:14,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:34:14,199 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)] === [2024-06-27 21:34:14,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1661770609, now seen corresponding path program 2 times [2024-06-27 21:34:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:14,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894950108] [2024-06-27 21:34:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:14,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:16,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:16,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894950108] [2024-06-27 21:34:16,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894950108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:16,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:16,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:16,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690387145] [2024-06-27 21:34:16,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:16,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:16,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:16,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:16,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:16,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:16,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 98 transitions, 731 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:16,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:16,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:16,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:17,835 INFO L124 PetriNetUnfolderBase]: 1610/2633 cut-off events. [2024-06-27 21:34:17,836 INFO L125 PetriNetUnfolderBase]: For 46748/46748 co-relation queries the response was YES. [2024-06-27 21:34:17,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12563 conditions, 2633 events. 1610/2633 cut-off events. For 46748/46748 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14365 event pairs, 519 based on Foata normal form. 4/2636 useless extension candidates. Maximal degree in co-relation 12517. Up to 2478 conditions per place. [2024-06-27 21:34:17,848 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 97 selfloop transitions, 14 changer transitions 0/116 dead transitions. [2024-06-27 21:34:17,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 116 transitions, 1029 flow [2024-06-27 21:34:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 21:34:17,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-27 21:34:17,850 INFO L175 Difference]: Start difference. First operand has 103 places, 98 transitions, 731 flow. Second operand 7 states and 110 transitions. [2024-06-27 21:34:17,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 116 transitions, 1029 flow [2024-06-27 21:34:17,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 116 transitions, 988 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:17,885 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 764 flow [2024-06-27 21:34:17,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=764, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2024-06-27 21:34:17,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-27 21:34:17,885 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 764 flow [2024-06-27 21:34:17,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:17,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:17,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:17,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:34:17,886 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:17,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1247499477, now seen corresponding path program 3 times [2024-06-27 21:34:17,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:17,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395138456] [2024-06-27 21:34:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:20,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:20,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395138456] [2024-06-27 21:34:20,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395138456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:20,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:20,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:20,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204838307] [2024-06-27 21:34:20,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:20,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:20,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:20,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:20,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:20,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:20,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 764 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:20,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:20,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:20,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:21,337 INFO L124 PetriNetUnfolderBase]: 1598/2603 cut-off events. [2024-06-27 21:34:21,337 INFO L125 PetriNetUnfolderBase]: For 48613/48613 co-relation queries the response was YES. [2024-06-27 21:34:21,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12483 conditions, 2603 events. 1598/2603 cut-off events. For 48613/48613 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14217 event pairs, 533 based on Foata normal form. 4/2604 useless extension candidates. Maximal degree in co-relation 12435. Up to 2378 conditions per place. [2024-06-27 21:34:21,352 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 86 selfloop transitions, 28 changer transitions 0/119 dead transitions. [2024-06-27 21:34:21,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 119 transitions, 1056 flow [2024-06-27 21:34:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:34:21,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 21:34:21,354 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 764 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:34:21,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 119 transitions, 1056 flow [2024-06-27 21:34:21,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 119 transitions, 979 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 21:34:21,388 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 749 flow [2024-06-27 21:34:21,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=749, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2024-06-27 21:34:21,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-27 21:34:21,389 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 749 flow [2024-06-27 21:34:21,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:21,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:21,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:21,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:34:21,389 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:21,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1247930067, now seen corresponding path program 1 times [2024-06-27 21:34:21,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:21,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87999293] [2024-06-27 21:34:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:21,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:24,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:24,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87999293] [2024-06-27 21:34:24,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87999293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:24,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:24,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:24,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386736986] [2024-06-27 21:34:24,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:24,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:24,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:24,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:24,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 749 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:24,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:24,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:24,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:25,723 INFO L124 PetriNetUnfolderBase]: 1593/2610 cut-off events. [2024-06-27 21:34:25,723 INFO L125 PetriNetUnfolderBase]: For 49885/49885 co-relation queries the response was YES. [2024-06-27 21:34:25,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12470 conditions, 2610 events. 1593/2610 cut-off events. For 49885/49885 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14167 event pairs, 518 based on Foata normal form. 2/2611 useless extension candidates. Maximal degree in co-relation 12423. Up to 2465 conditions per place. [2024-06-27 21:34:25,738 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 99 selfloop transitions, 13 changer transitions 0/117 dead transitions. [2024-06-27 21:34:25,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 117 transitions, 1031 flow [2024-06-27 21:34:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 21:34:25,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-27 21:34:25,740 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 749 flow. Second operand 7 states and 108 transitions. [2024-06-27 21:34:25,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 117 transitions, 1031 flow [2024-06-27 21:34:25,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 117 transitions, 947 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:25,770 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 726 flow [2024-06-27 21:34:25,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=726, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-06-27 21:34:25,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 21:34:25,770 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 726 flow [2024-06-27 21:34:25,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:25,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:25,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:25,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:34:25,771 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:25,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:25,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1360283421, now seen corresponding path program 1 times [2024-06-27 21:34:25,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:25,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707629290] [2024-06-27 21:34:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:25,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:27,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:27,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707629290] [2024-06-27 21:34:27,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707629290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:27,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:27,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:27,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107936520] [2024-06-27 21:34:27,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:27,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:27,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:27,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:27,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:27,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:27,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 726 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:27,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:27,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:27,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:28,808 INFO L124 PetriNetUnfolderBase]: 1619/2648 cut-off events. [2024-06-27 21:34:28,808 INFO L125 PetriNetUnfolderBase]: For 53925/53927 co-relation queries the response was YES. [2024-06-27 21:34:28,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12752 conditions, 2648 events. 1619/2648 cut-off events. For 53925/53927 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14423 event pairs, 461 based on Foata normal form. 4/2651 useless extension candidates. Maximal degree in co-relation 12704. Up to 2364 conditions per place. [2024-06-27 21:34:28,822 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 114 selfloop transitions, 32 changer transitions 0/151 dead transitions. [2024-06-27 21:34:28,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 151 transitions, 1332 flow [2024-06-27 21:34:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:34:28,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 21:34:28,824 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 726 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:34:28,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 151 transitions, 1332 flow [2024-06-27 21:34:28,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 151 transitions, 1287 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:28,863 INFO L231 Difference]: Finished difference. Result has 112 places, 121 transitions, 928 flow [2024-06-27 21:34:28,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=928, PETRI_PLACES=112, PETRI_TRANSITIONS=121} [2024-06-27 21:34:28,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-27 21:34:28,863 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 121 transitions, 928 flow [2024-06-27 21:34:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:28,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:28,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:28,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:34:28,864 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)] === [2024-06-27 21:34:28,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash -353125487, now seen corresponding path program 2 times [2024-06-27 21:34:28,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:28,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323247934] [2024-06-27 21:34:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:28,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:31,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:31,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323247934] [2024-06-27 21:34:31,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323247934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:31,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:31,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:31,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053192418] [2024-06-27 21:34:31,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:31,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:31,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:31,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:31,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:31,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:31,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 121 transitions, 928 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:31,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:31,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:31,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:32,245 INFO L124 PetriNetUnfolderBase]: 1639/2678 cut-off events. [2024-06-27 21:34:32,246 INFO L125 PetriNetUnfolderBase]: For 59315/59315 co-relation queries the response was YES. [2024-06-27 21:34:32,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13471 conditions, 2678 events. 1639/2678 cut-off events. For 59315/59315 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14616 event pairs, 522 based on Foata normal form. 4/2681 useless extension candidates. Maximal degree in co-relation 13420. Up to 2477 conditions per place. [2024-06-27 21:34:32,261 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 28 changer transitions 0/150 dead transitions. [2024-06-27 21:34:32,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 150 transitions, 1358 flow [2024-06-27 21:34:32,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:34:32,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 21:34:32,262 INFO L175 Difference]: Start difference. First operand has 112 places, 121 transitions, 928 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:34:32,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 150 transitions, 1358 flow [2024-06-27 21:34:32,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 150 transitions, 1326 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 21:34:32,299 INFO L231 Difference]: Finished difference. Result has 118 places, 127 transitions, 1038 flow [2024-06-27 21:34:32,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1038, PETRI_PLACES=118, PETRI_TRANSITIONS=127} [2024-06-27 21:34:32,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 21:34:32,300 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 127 transitions, 1038 flow [2024-06-27 21:34:32,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:32,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:32,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:32,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:34:32,301 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)] === [2024-06-27 21:34:32,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:32,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1044696669, now seen corresponding path program 3 times [2024-06-27 21:34:32,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:32,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985986055] [2024-06-27 21:34:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:32,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:34,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:34,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985986055] [2024-06-27 21:34:34,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985986055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:34,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:34,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:34,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664993206] [2024-06-27 21:34:34,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:34,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:34,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:34,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:34,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:34,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 127 transitions, 1038 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:34,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:34,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:34,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:35,448 INFO L124 PetriNetUnfolderBase]: 1649/2685 cut-off events. [2024-06-27 21:34:35,448 INFO L125 PetriNetUnfolderBase]: For 62837/62837 co-relation queries the response was YES. [2024-06-27 21:34:35,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14031 conditions, 2685 events. 1649/2685 cut-off events. For 62837/62837 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14673 event pairs, 460 based on Foata normal form. 2/2685 useless extension candidates. Maximal degree in co-relation 13977. Up to 2398 conditions per place. [2024-06-27 21:34:35,466 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 112 selfloop transitions, 39 changer transitions 0/156 dead transitions. [2024-06-27 21:34:35,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 156 transitions, 1568 flow [2024-06-27 21:34:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:34:35,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 21:34:35,468 INFO L175 Difference]: Start difference. First operand has 118 places, 127 transitions, 1038 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:34:35,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 156 transitions, 1568 flow [2024-06-27 21:34:35,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 156 transitions, 1482 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:35,508 INFO L231 Difference]: Finished difference. Result has 120 places, 131 transitions, 1082 flow [2024-06-27 21:34:35,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1082, PETRI_PLACES=120, PETRI_TRANSITIONS=131} [2024-06-27 21:34:35,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-27 21:34:35,508 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 131 transitions, 1082 flow [2024-06-27 21:34:35,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:35,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:35,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:35,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:34:35,509 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)] === [2024-06-27 21:34:35,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1010490071, now seen corresponding path program 4 times [2024-06-27 21:34:35,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:35,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280386486] [2024-06-27 21:34:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:35,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:37,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:37,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280386486] [2024-06-27 21:34:37,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280386486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:37,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:37,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:37,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104877146] [2024-06-27 21:34:37,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:37,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:37,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:37,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:37,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:37,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:37,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 131 transitions, 1082 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:37,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:37,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:37,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:39,000 INFO L124 PetriNetUnfolderBase]: 1659/2703 cut-off events. [2024-06-27 21:34:39,001 INFO L125 PetriNetUnfolderBase]: For 66489/66489 co-relation queries the response was YES. [2024-06-27 21:34:39,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14276 conditions, 2703 events. 1659/2703 cut-off events. For 66489/66489 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14799 event pairs, 465 based on Foata normal form. 2/2703 useless extension candidates. Maximal degree in co-relation 14221. Up to 2408 conditions per place. [2024-06-27 21:34:39,020 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 107 selfloop transitions, 43 changer transitions 0/155 dead transitions. [2024-06-27 21:34:39,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 155 transitions, 1540 flow [2024-06-27 21:34:39,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:34:39,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 21:34:39,021 INFO L175 Difference]: Start difference. First operand has 120 places, 131 transitions, 1082 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:34:39,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 155 transitions, 1540 flow [2024-06-27 21:34:39,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 155 transitions, 1473 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 21:34:39,064 INFO L231 Difference]: Finished difference. Result has 125 places, 135 transitions, 1155 flow [2024-06-27 21:34:39,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1155, PETRI_PLACES=125, PETRI_TRANSITIONS=135} [2024-06-27 21:34:39,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-27 21:34:39,065 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 135 transitions, 1155 flow [2024-06-27 21:34:39,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:39,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:39,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:39,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:34:39,066 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:39,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:39,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1237539963, now seen corresponding path program 5 times [2024-06-27 21:34:39,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:39,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094648485] [2024-06-27 21:34:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:39,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:41,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:41,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094648485] [2024-06-27 21:34:41,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094648485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:41,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:41,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:41,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30818066] [2024-06-27 21:34:41,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:41,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:41,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:41,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:41,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:41,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:41,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 135 transitions, 1155 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:41,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:41,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:41,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:41,998 INFO L124 PetriNetUnfolderBase]: 1669/2710 cut-off events. [2024-06-27 21:34:41,998 INFO L125 PetriNetUnfolderBase]: For 70601/70601 co-relation queries the response was YES. [2024-06-27 21:34:42,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14443 conditions, 2710 events. 1669/2710 cut-off events. For 70601/70601 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14839 event pairs, 537 based on Foata normal form. 2/2709 useless extension candidates. Maximal degree in co-relation 14386. Up to 2487 conditions per place. [2024-06-27 21:34:42,017 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 109 selfloop transitions, 39 changer transitions 0/153 dead transitions. [2024-06-27 21:34:42,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 153 transitions, 1589 flow [2024-06-27 21:34:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:34:42,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 21:34:42,019 INFO L175 Difference]: Start difference. First operand has 125 places, 135 transitions, 1155 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:34:42,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 153 transitions, 1589 flow [2024-06-27 21:34:42,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 153 transitions, 1517 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:42,066 INFO L231 Difference]: Finished difference. Result has 130 places, 138 transitions, 1231 flow [2024-06-27 21:34:42,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1231, PETRI_PLACES=130, PETRI_TRANSITIONS=138} [2024-06-27 21:34:42,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-27 21:34:42,067 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 138 transitions, 1231 flow [2024-06-27 21:34:42,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:42,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:42,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:42,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:34:42,067 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:42,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 17772463, now seen corresponding path program 6 times [2024-06-27 21:34:42,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:42,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537533015] [2024-06-27 21:34:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:42,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:44,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:44,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537533015] [2024-06-27 21:34:44,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537533015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:44,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:44,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:44,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438561338] [2024-06-27 21:34:44,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:44,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:44,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:44,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:44,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:44,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:44,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 138 transitions, 1231 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:44,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:44,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:44,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:45,384 INFO L124 PetriNetUnfolderBase]: 1657/2698 cut-off events. [2024-06-27 21:34:45,385 INFO L125 PetriNetUnfolderBase]: For 74853/74853 co-relation queries the response was YES. [2024-06-27 21:34:45,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14646 conditions, 2698 events. 1657/2698 cut-off events. For 74853/74853 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14813 event pairs, 539 based on Foata normal form. 4/2699 useless extension candidates. Maximal degree in co-relation 14587. Up to 2477 conditions per place. [2024-06-27 21:34:45,404 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 111 selfloop transitions, 40 changer transitions 0/156 dead transitions. [2024-06-27 21:34:45,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 156 transitions, 1579 flow [2024-06-27 21:34:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:34:45,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 21:34:45,406 INFO L175 Difference]: Start difference. First operand has 130 places, 138 transitions, 1231 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:34:45,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 156 transitions, 1579 flow [2024-06-27 21:34:45,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 156 transitions, 1471 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:45,453 INFO L231 Difference]: Finished difference. Result has 134 places, 138 transitions, 1213 flow [2024-06-27 21:34:45,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1213, PETRI_PLACES=134, PETRI_TRANSITIONS=138} [2024-06-27 21:34:45,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-27 21:34:45,454 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 138 transitions, 1213 flow [2024-06-27 21:34:45,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:45,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:45,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:45,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:34:45,455 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:45,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash 780307281, now seen corresponding path program 1 times [2024-06-27 21:34:45,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:45,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130704009] [2024-06-27 21:34:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:45,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:48,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:48,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130704009] [2024-06-27 21:34:48,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130704009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:48,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:48,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:48,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707549242] [2024-06-27 21:34:48,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:48,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:48,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:48,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:48,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:48,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:34:48,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 138 transitions, 1213 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:48,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:48,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:34:48,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:48,976 INFO L124 PetriNetUnfolderBase]: 1664/2756 cut-off events. [2024-06-27 21:34:48,976 INFO L125 PetriNetUnfolderBase]: For 88300/88302 co-relation queries the response was YES. [2024-06-27 21:34:48,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15255 conditions, 2756 events. 1664/2756 cut-off events. For 88300/88302 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15500 event pairs, 437 based on Foata normal form. 10/2758 useless extension candidates. Maximal degree in co-relation 15195. Up to 2308 conditions per place. [2024-06-27 21:34:48,995 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 128 selfloop transitions, 25 changer transitions 0/174 dead transitions. [2024-06-27 21:34:48,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 174 transitions, 1721 flow [2024-06-27 21:34:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 21:34:48,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-27 21:34:48,997 INFO L175 Difference]: Start difference. First operand has 134 places, 138 transitions, 1213 flow. Second operand 7 states and 134 transitions. [2024-06-27 21:34:48,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 174 transitions, 1721 flow [2024-06-27 21:34:49,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 174 transitions, 1627 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:34:49,056 INFO L231 Difference]: Finished difference. Result has 134 places, 140 transitions, 1203 flow [2024-06-27 21:34:49,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1203, PETRI_PLACES=134, PETRI_TRANSITIONS=140} [2024-06-27 21:34:49,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-27 21:34:49,057 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 140 transitions, 1203 flow [2024-06-27 21:34:49,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:49,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:49,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:49,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:34:49,058 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:49,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:49,058 INFO L85 PathProgramCache]: Analyzing trace with hash 780367731, now seen corresponding path program 2 times [2024-06-27 21:34:49,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:49,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91955999] [2024-06-27 21:34:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:49,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:51,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:51,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91955999] [2024-06-27 21:34:51,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91955999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:51,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:51,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:51,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106286147] [2024-06-27 21:34:51,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:51,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:51,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:51,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:51,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:51,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:34:51,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 140 transitions, 1203 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:51,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:51,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:34:51,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:52,845 INFO L124 PetriNetUnfolderBase]: 1714/2834 cut-off events. [2024-06-27 21:34:52,846 INFO L125 PetriNetUnfolderBase]: For 96334/96336 co-relation queries the response was YES. [2024-06-27 21:34:52,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15851 conditions, 2834 events. 1714/2834 cut-off events. For 96334/96336 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16017 event pairs, 473 based on Foata normal form. 14/2840 useless extension candidates. Maximal degree in co-relation 15790. Up to 2479 conditions per place. [2024-06-27 21:34:52,866 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 124 selfloop transitions, 23 changer transitions 0/168 dead transitions. [2024-06-27 21:34:52,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 1595 flow [2024-06-27 21:34:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:34:52,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 21:34:52,880 INFO L175 Difference]: Start difference. First operand has 134 places, 140 transitions, 1203 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:34:52,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 1595 flow [2024-06-27 21:34:52,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 168 transitions, 1562 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:52,941 INFO L231 Difference]: Finished difference. Result has 138 places, 141 transitions, 1240 flow [2024-06-27 21:34:52,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1240, PETRI_PLACES=138, PETRI_TRANSITIONS=141} [2024-06-27 21:34:52,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-27 21:34:52,943 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 141 transitions, 1240 flow [2024-06-27 21:34:52,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:52,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:52,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:52,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:34:52,943 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)] === [2024-06-27 21:34:52,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:52,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1691885117, now seen corresponding path program 3 times [2024-06-27 21:34:52,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:52,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966148017] [2024-06-27 21:34:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:52,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:55,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:55,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966148017] [2024-06-27 21:34:55,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966148017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:55,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:55,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:55,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029803839] [2024-06-27 21:34:55,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:55,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:55,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:55,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:55,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:55,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:34:55,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 141 transitions, 1240 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:55,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:55,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:34:55,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:56,704 INFO L124 PetriNetUnfolderBase]: 1679/2784 cut-off events. [2024-06-27 21:34:56,704 INFO L125 PetriNetUnfolderBase]: For 91346/91346 co-relation queries the response was YES. [2024-06-27 21:34:56,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15328 conditions, 2784 events. 1679/2784 cut-off events. For 91346/91346 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15701 event pairs, 496 based on Foata normal form. 14/2797 useless extension candidates. Maximal degree in co-relation 15265. Up to 2472 conditions per place. [2024-06-27 21:34:56,722 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 16 changer transitions 0/162 dead transitions. [2024-06-27 21:34:56,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 162 transitions, 1590 flow [2024-06-27 21:34:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:34:56,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 21:34:56,724 INFO L175 Difference]: Start difference. First operand has 138 places, 141 transitions, 1240 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:34:56,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 162 transitions, 1590 flow [2024-06-27 21:34:56,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 162 transitions, 1538 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:56,809 INFO L231 Difference]: Finished difference. Result has 140 places, 141 transitions, 1226 flow [2024-06-27 21:34:56,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=140, PETRI_TRANSITIONS=141} [2024-06-27 21:34:56,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-27 21:34:56,809 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 141 transitions, 1226 flow [2024-06-27 21:34:56,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:56,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:56,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:56,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:34:56,810 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:56,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:56,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2054512, now seen corresponding path program 1 times [2024-06-27 21:34:56,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:56,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264019536] [2024-06-27 21:34:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:56,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:59,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:59,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264019536] [2024-06-27 21:34:59,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264019536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:59,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:59,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:59,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537222765] [2024-06-27 21:34:59,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:59,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:59,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:59,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:59,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:59,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:59,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 141 transitions, 1226 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:59,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:59,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:59,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:00,534 INFO L124 PetriNetUnfolderBase]: 1810/2941 cut-off events. [2024-06-27 21:35:00,534 INFO L125 PetriNetUnfolderBase]: For 90305/90307 co-relation queries the response was YES. [2024-06-27 21:35:00,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16119 conditions, 2941 events. 1810/2941 cut-off events. For 90305/90307 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16266 event pairs, 485 based on Foata normal form. 6/2946 useless extension candidates. Maximal degree in co-relation 16055. Up to 2477 conditions per place. [2024-06-27 21:35:00,553 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 56 changer transitions 0/192 dead transitions. [2024-06-27 21:35:00,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 192 transitions, 1978 flow [2024-06-27 21:35:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:35:00,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:35:00,555 INFO L175 Difference]: Start difference. First operand has 140 places, 141 transitions, 1226 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:35:00,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 192 transitions, 1978 flow [2024-06-27 21:35:00,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 192 transitions, 1935 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:00,617 INFO L231 Difference]: Finished difference. Result has 143 places, 156 transitions, 1493 flow [2024-06-27 21:35:00,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1493, PETRI_PLACES=143, PETRI_TRANSITIONS=156} [2024-06-27 21:35:00,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 21:35:00,619 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 156 transitions, 1493 flow [2024-06-27 21:35:00,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:00,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:00,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:00,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:35:00,619 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:00,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash -192463600, now seen corresponding path program 2 times [2024-06-27 21:35:00,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:00,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347150208] [2024-06-27 21:35:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:00,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:03,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:03,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347150208] [2024-06-27 21:35:03,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347150208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:03,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:03,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:03,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704191415] [2024-06-27 21:35:03,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:03,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:03,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:03,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:03,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 156 transitions, 1493 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:03,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:03,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:03,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:04,545 INFO L124 PetriNetUnfolderBase]: 1914/3075 cut-off events. [2024-06-27 21:35:04,545 INFO L125 PetriNetUnfolderBase]: For 106573/106573 co-relation queries the response was YES. [2024-06-27 21:35:04,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17828 conditions, 3075 events. 1914/3075 cut-off events. For 106573/106573 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16924 event pairs, 543 based on Foata normal form. 8/3082 useless extension candidates. Maximal degree in co-relation 17762. Up to 2744 conditions per place. [2024-06-27 21:35:04,568 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 55 changer transitions 0/203 dead transitions. [2024-06-27 21:35:04,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 203 transitions, 2260 flow [2024-06-27 21:35:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:35:04,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:35:04,570 INFO L175 Difference]: Start difference. First operand has 143 places, 156 transitions, 1493 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:35:04,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 203 transitions, 2260 flow [2024-06-27 21:35:04,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 203 transitions, 2181 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:04,677 INFO L231 Difference]: Finished difference. Result has 150 places, 168 transitions, 1726 flow [2024-06-27 21:35:04,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1726, PETRI_PLACES=150, PETRI_TRANSITIONS=168} [2024-06-27 21:35:04,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-27 21:35:04,677 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 168 transitions, 1726 flow [2024-06-27 21:35:04,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:04,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:04,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:04,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:35:04,678 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:04,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1426975282, now seen corresponding path program 3 times [2024-06-27 21:35:04,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:04,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112104996] [2024-06-27 21:35:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:04,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:07,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:07,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112104996] [2024-06-27 21:35:07,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112104996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:07,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:07,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:07,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018424278] [2024-06-27 21:35:07,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:07,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:07,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:07,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:07,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:07,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:07,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 168 transitions, 1726 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:07,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:07,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:07,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:08,310 INFO L124 PetriNetUnfolderBase]: 1890/3055 cut-off events. [2024-06-27 21:35:08,310 INFO L125 PetriNetUnfolderBase]: For 106553/106553 co-relation queries the response was YES. [2024-06-27 21:35:08,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17889 conditions, 3055 events. 1890/3055 cut-off events. For 106553/106553 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16954 event pairs, 547 based on Foata normal form. 8/3062 useless extension candidates. Maximal degree in co-relation 17821. Up to 2728 conditions per place. [2024-06-27 21:35:08,333 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 141 selfloop transitions, 53 changer transitions 0/199 dead transitions. [2024-06-27 21:35:08,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 199 transitions, 2219 flow [2024-06-27 21:35:08,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:35:08,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:35:08,334 INFO L175 Difference]: Start difference. First operand has 150 places, 168 transitions, 1726 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:35:08,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 199 transitions, 2219 flow [2024-06-27 21:35:08,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 199 transitions, 2042 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:08,437 INFO L231 Difference]: Finished difference. Result has 152 places, 168 transitions, 1665 flow [2024-06-27 21:35:08,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1665, PETRI_PLACES=152, PETRI_TRANSITIONS=168} [2024-06-27 21:35:08,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-27 21:35:08,438 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 168 transitions, 1665 flow [2024-06-27 21:35:08,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:08,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:08,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:08,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:35:08,441 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)] === [2024-06-27 21:35:08,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash 145770414, now seen corresponding path program 1 times [2024-06-27 21:35:08,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:08,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591171494] [2024-06-27 21:35:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:08,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:12,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:12,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591171494] [2024-06-27 21:35:12,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591171494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:12,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:12,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:12,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455726353] [2024-06-27 21:35:12,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:12,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:12,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:12,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:12,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:12,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:12,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 168 transitions, 1665 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:12,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:12,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:12,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:13,552 INFO L124 PetriNetUnfolderBase]: 1934/3123 cut-off events. [2024-06-27 21:35:13,552 INFO L125 PetriNetUnfolderBase]: For 113949/113949 co-relation queries the response was YES. [2024-06-27 21:35:13,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18235 conditions, 3123 events. 1934/3123 cut-off events. For 113949/113949 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17334 event pairs, 551 based on Foata normal form. 12/3134 useless extension candidates. Maximal degree in co-relation 18165. Up to 2820 conditions per place. [2024-06-27 21:35:13,577 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 159 selfloop transitions, 38 changer transitions 0/202 dead transitions. [2024-06-27 21:35:13,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 202 transitions, 2222 flow [2024-06-27 21:35:13,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:35:13,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 21:35:13,579 INFO L175 Difference]: Start difference. First operand has 152 places, 168 transitions, 1665 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:35:13,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 202 transitions, 2222 flow [2024-06-27 21:35:13,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 202 transitions, 2116 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:13,661 INFO L231 Difference]: Finished difference. Result has 153 places, 169 transitions, 1659 flow [2024-06-27 21:35:13,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1659, PETRI_PLACES=153, PETRI_TRANSITIONS=169} [2024-06-27 21:35:13,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-27 21:35:13,662 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 169 transitions, 1659 flow [2024-06-27 21:35:13,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:13,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:13,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:13,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:35:13,663 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)] === [2024-06-27 21:35:13,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:13,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1503952270, now seen corresponding path program 4 times [2024-06-27 21:35:13,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:13,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324965676] [2024-06-27 21:35:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:13,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:16,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:16,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324965676] [2024-06-27 21:35:16,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324965676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:16,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:16,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:16,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830860716] [2024-06-27 21:35:16,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:16,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:16,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:16,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:16,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:16,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:16,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 169 transitions, 1659 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:16,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:16,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:16,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:17,533 INFO L124 PetriNetUnfolderBase]: 1954/3150 cut-off events. [2024-06-27 21:35:17,534 INFO L125 PetriNetUnfolderBase]: For 112214/112214 co-relation queries the response was YES. [2024-06-27 21:35:17,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18509 conditions, 3150 events. 1954/3150 cut-off events. For 112214/112214 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17533 event pairs, 502 based on Foata normal form. 4/3152 useless extension candidates. Maximal degree in co-relation 18438. Up to 2649 conditions per place. [2024-06-27 21:35:17,560 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 66 changer transitions 0/204 dead transitions. [2024-06-27 21:35:17,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 204 transitions, 2351 flow [2024-06-27 21:35:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:35:17,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:35:17,561 INFO L175 Difference]: Start difference. First operand has 153 places, 169 transitions, 1659 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:35:17,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 204 transitions, 2351 flow [2024-06-27 21:35:17,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 204 transitions, 2273 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:17,652 INFO L231 Difference]: Finished difference. Result has 155 places, 173 transitions, 1775 flow [2024-06-27 21:35:17,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1775, PETRI_PLACES=155, PETRI_TRANSITIONS=173} [2024-06-27 21:35:17,653 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 21:35:17,653 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 173 transitions, 1775 flow [2024-06-27 21:35:17,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:17,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:17,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:17,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:35:17,653 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:17,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:17,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1619461626, now seen corresponding path program 5 times [2024-06-27 21:35:17,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:17,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827507457] [2024-06-27 21:35:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:20,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827507457] [2024-06-27 21:35:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827507457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:20,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:20,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:20,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702324579] [2024-06-27 21:35:20,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:20,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:20,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:20,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:20,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:20,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:20,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 173 transitions, 1775 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:20,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:20,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:20,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:21,656 INFO L124 PetriNetUnfolderBase]: 1974/3183 cut-off events. [2024-06-27 21:35:21,657 INFO L125 PetriNetUnfolderBase]: For 117374/117374 co-relation queries the response was YES. [2024-06-27 21:35:21,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18925 conditions, 3183 events. 1974/3183 cut-off events. For 117374/117374 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17773 event pairs, 509 based on Foata normal form. 4/3186 useless extension candidates. Maximal degree in co-relation 18853. Up to 2936 conditions per place. [2024-06-27 21:35:21,683 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 26 changer transitions 0/201 dead transitions. [2024-06-27 21:35:21,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 201 transitions, 2270 flow [2024-06-27 21:35:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:35:21,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 21:35:21,685 INFO L175 Difference]: Start difference. First operand has 155 places, 173 transitions, 1775 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:35:21,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 201 transitions, 2270 flow [2024-06-27 21:35:21,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 201 transitions, 2135 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:21,792 INFO L231 Difference]: Finished difference. Result has 159 places, 176 transitions, 1751 flow [2024-06-27 21:35:21,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1751, PETRI_PLACES=159, PETRI_TRANSITIONS=176} [2024-06-27 21:35:21,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-27 21:35:21,792 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 176 transitions, 1751 flow [2024-06-27 21:35:21,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:21,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:21,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:21,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:35:21,793 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)] === [2024-06-27 21:35:21,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:21,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1491987820, now seen corresponding path program 6 times [2024-06-27 21:35:21,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:21,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776531442] [2024-06-27 21:35:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:21,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:24,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:24,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776531442] [2024-06-27 21:35:24,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776531442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:24,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:24,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:24,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609363931] [2024-06-27 21:35:24,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:24,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:24,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:24,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:24,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:24,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:24,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 176 transitions, 1751 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:24,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:24,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:24,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:25,794 INFO L124 PetriNetUnfolderBase]: 1994/3212 cut-off events. [2024-06-27 21:35:25,795 INFO L125 PetriNetUnfolderBase]: For 122011/122011 co-relation queries the response was YES. [2024-06-27 21:35:25,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18944 conditions, 3212 events. 1994/3212 cut-off events. For 122011/122011 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 17944 event pairs, 504 based on Foata normal form. 4/3214 useless extension candidates. Maximal degree in co-relation 18870. Up to 2681 conditions per place. [2024-06-27 21:35:25,817 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 130 selfloop transitions, 71 changer transitions 0/206 dead transitions. [2024-06-27 21:35:25,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 206 transitions, 2349 flow [2024-06-27 21:35:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:35:25,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 21:35:25,819 INFO L175 Difference]: Start difference. First operand has 159 places, 176 transitions, 1751 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:35:25,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 206 transitions, 2349 flow [2024-06-27 21:35:25,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 206 transitions, 2263 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:25,926 INFO L231 Difference]: Finished difference. Result has 161 places, 179 transitions, 1861 flow [2024-06-27 21:35:25,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1861, PETRI_PLACES=161, PETRI_TRANSITIONS=179} [2024-06-27 21:35:25,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-27 21:35:25,927 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 179 transitions, 1861 flow [2024-06-27 21:35:25,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:25,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:25,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:25,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:35:25,928 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)] === [2024-06-27 21:35:25,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:25,930 INFO L85 PathProgramCache]: Analyzing trace with hash 772978286, now seen corresponding path program 7 times [2024-06-27 21:35:25,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:25,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636417672] [2024-06-27 21:35:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:25,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:28,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:28,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636417672] [2024-06-27 21:35:28,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636417672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:28,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:28,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:28,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979169926] [2024-06-27 21:35:28,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:28,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:28,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:28,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:28,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:28,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:28,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 179 transitions, 1861 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:28,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:28,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:28,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:30,098 INFO L124 PetriNetUnfolderBase]: 2098/3365 cut-off events. [2024-06-27 21:35:30,099 INFO L125 PetriNetUnfolderBase]: For 137227/137227 co-relation queries the response was YES. [2024-06-27 21:35:30,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20466 conditions, 3365 events. 2098/3365 cut-off events. For 137227/137227 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18760 event pairs, 582 based on Foata normal form. 4/3368 useless extension candidates. Maximal degree in co-relation 20391. Up to 3082 conditions per place. [2024-06-27 21:35:30,127 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 186 selfloop transitions, 32 changer transitions 0/223 dead transitions. [2024-06-27 21:35:30,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 223 transitions, 2746 flow [2024-06-27 21:35:30,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:35:30,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:35:30,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-27 21:35:30,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-06-27 21:35:30,129 INFO L175 Difference]: Start difference. First operand has 161 places, 179 transitions, 1861 flow. Second operand 12 states and 182 transitions. [2024-06-27 21:35:30,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 223 transitions, 2746 flow [2024-06-27 21:35:30,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 223 transitions, 2603 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:30,229 INFO L231 Difference]: Finished difference. Result has 170 places, 192 transitions, 2017 flow [2024-06-27 21:35:30,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2017, PETRI_PLACES=170, PETRI_TRANSITIONS=192} [2024-06-27 21:35:30,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-27 21:35:30,230 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 192 transitions, 2017 flow [2024-06-27 21:35:30,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:30,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:30,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:30,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:35:30,231 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)] === [2024-06-27 21:35:30,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:30,235 INFO L85 PathProgramCache]: Analyzing trace with hash 757601046, now seen corresponding path program 8 times [2024-06-27 21:35:30,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:30,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750388840] [2024-06-27 21:35:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:30,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:32,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:32,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750388840] [2024-06-27 21:35:32,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750388840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:32,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:32,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:32,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960736302] [2024-06-27 21:35:32,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:32,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:32,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:32,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:32,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:32,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:32,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 192 transitions, 2017 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:32,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:32,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:32,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:33,910 INFO L124 PetriNetUnfolderBase]: 2118/3385 cut-off events. [2024-06-27 21:35:33,910 INFO L125 PetriNetUnfolderBase]: For 142977/142977 co-relation queries the response was YES. [2024-06-27 21:35:33,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20573 conditions, 3385 events. 2118/3385 cut-off events. For 142977/142977 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 18934 event pairs, 582 based on Foata normal form. 4/3386 useless extension candidates. Maximal degree in co-relation 20495. Up to 2846 conditions per place. [2024-06-27 21:35:33,941 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 130 selfloop transitions, 82 changer transitions 0/217 dead transitions. [2024-06-27 21:35:33,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 217 transitions, 2725 flow [2024-06-27 21:35:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:35:33,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 21:35:33,943 INFO L175 Difference]: Start difference. First operand has 170 places, 192 transitions, 2017 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:35:33,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 217 transitions, 2725 flow [2024-06-27 21:35:34,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 2547 flow, removed 35 selfloop flow, removed 10 redundant places. [2024-06-27 21:35:34,068 INFO L231 Difference]: Finished difference. Result has 169 places, 195 transitions, 2116 flow [2024-06-27 21:35:34,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2116, PETRI_PLACES=169, PETRI_TRANSITIONS=195} [2024-06-27 21:35:34,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 21:35:34,069 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 195 transitions, 2116 flow [2024-06-27 21:35:34,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:34,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:34,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:34,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:35:34,070 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)] === [2024-06-27 21:35:34,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:34,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1335915276, now seen corresponding path program 9 times [2024-06-27 21:35:34,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:34,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932089341] [2024-06-27 21:35:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:34,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:36,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:36,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932089341] [2024-06-27 21:35:36,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932089341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:36,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:36,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:36,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617838247] [2024-06-27 21:35:36,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:36,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:36,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:36,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:36,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:36,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:36,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 195 transitions, 2116 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:36,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:36,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:36,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:38,265 INFO L124 PetriNetUnfolderBase]: 2190/3489 cut-off events. [2024-06-27 21:35:38,265 INFO L125 PetriNetUnfolderBase]: For 160644/160644 co-relation queries the response was YES. [2024-06-27 21:35:38,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22185 conditions, 3489 events. 2190/3489 cut-off events. For 160644/160644 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19472 event pairs, 582 based on Foata normal form. 8/3494 useless extension candidates. Maximal degree in co-relation 22106. Up to 2902 conditions per place. [2024-06-27 21:35:38,291 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 133 selfloop transitions, 97 changer transitions 0/235 dead transitions. [2024-06-27 21:35:38,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 235 transitions, 3034 flow [2024-06-27 21:35:38,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:35:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:35:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-27 21:35:38,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-27 21:35:38,293 INFO L175 Difference]: Start difference. First operand has 169 places, 195 transitions, 2116 flow. Second operand 11 states and 183 transitions. [2024-06-27 21:35:38,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 235 transitions, 3034 flow [2024-06-27 21:35:38,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 235 transitions, 2740 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:38,478 INFO L231 Difference]: Finished difference. Result has 173 places, 204 transitions, 2210 flow [2024-06-27 21:35:38,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2210, PETRI_PLACES=173, PETRI_TRANSITIONS=204} [2024-06-27 21:35:38,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-27 21:35:38,479 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 204 transitions, 2210 flow [2024-06-27 21:35:38,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:38,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:38,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:38,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:35:38,480 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)] === [2024-06-27 21:35:38,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash 550947606, now seen corresponding path program 10 times [2024-06-27 21:35:38,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:38,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069801107] [2024-06-27 21:35:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:38,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:41,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:41,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069801107] [2024-06-27 21:35:41,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069801107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:41,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:41,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:41,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071708078] [2024-06-27 21:35:41,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:41,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:41,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:41,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:41,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:41,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 204 transitions, 2210 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:41,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:41,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:41,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:42,279 INFO L124 PetriNetUnfolderBase]: 2166/3457 cut-off events. [2024-06-27 21:35:42,280 INFO L125 PetriNetUnfolderBase]: For 154868/154868 co-relation queries the response was YES. [2024-06-27 21:35:42,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21363 conditions, 3457 events. 2166/3457 cut-off events. For 154868/154868 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19311 event pairs, 578 based on Foata normal form. 8/3462 useless extension candidates. Maximal degree in co-relation 21284. Up to 2886 conditions per place. [2024-06-27 21:35:42,311 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 134 selfloop transitions, 94 changer transitions 0/233 dead transitions. [2024-06-27 21:35:42,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 233 transitions, 2940 flow [2024-06-27 21:35:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:35:42,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-27 21:35:42,312 INFO L175 Difference]: Start difference. First operand has 173 places, 204 transitions, 2210 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:35:42,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 233 transitions, 2940 flow [2024-06-27 21:35:42,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 233 transitions, 2656 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-27 21:35:42,489 INFO L231 Difference]: Finished difference. Result has 175 places, 204 transitions, 2124 flow [2024-06-27 21:35:42,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2124, PETRI_PLACES=175, PETRI_TRANSITIONS=204} [2024-06-27 21:35:42,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-27 21:35:42,490 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 204 transitions, 2124 flow [2024-06-27 21:35:42,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:42,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:42,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:42,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:35:42,490 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)] === [2024-06-27 21:35:42,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:42,491 INFO L85 PathProgramCache]: Analyzing trace with hash 757613136, now seen corresponding path program 11 times [2024-06-27 21:35:42,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:42,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975794687] [2024-06-27 21:35:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:42,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:45,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:45,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975794687] [2024-06-27 21:35:45,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975794687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:45,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:45,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:45,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036342951] [2024-06-27 21:35:45,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:45,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:45,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:45,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:45,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:45,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:45,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 204 transitions, 2124 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:45,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:45,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:45,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:46,649 INFO L124 PetriNetUnfolderBase]: 2154/3445 cut-off events. [2024-06-27 21:35:46,649 INFO L125 PetriNetUnfolderBase]: For 149624/149624 co-relation queries the response was YES. [2024-06-27 21:35:46,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20867 conditions, 3445 events. 2154/3445 cut-off events. For 149624/149624 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19262 event pairs, 586 based on Foata normal form. 4/3448 useless extension candidates. Maximal degree in co-relation 20788. Up to 3222 conditions per place. [2024-06-27 21:35:46,679 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 197 selfloop transitions, 22 changer transitions 0/224 dead transitions. [2024-06-27 21:35:46,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 224 transitions, 2606 flow [2024-06-27 21:35:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:35:46,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:35:46,680 INFO L175 Difference]: Start difference. First operand has 175 places, 204 transitions, 2124 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:35:46,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 224 transitions, 2606 flow [2024-06-27 21:35:46,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 224 transitions, 2360 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 21:35:46,877 INFO L231 Difference]: Finished difference. Result has 174 places, 204 transitions, 1928 flow [2024-06-27 21:35:46,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1928, PETRI_PLACES=174, PETRI_TRANSITIONS=204} [2024-06-27 21:35:46,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-27 21:35:46,878 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 204 transitions, 1928 flow [2024-06-27 21:35:46,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:46,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:46,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:46,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:35:46,879 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)] === [2024-06-27 21:35:46,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash 562773486, now seen corresponding path program 12 times [2024-06-27 21:35:46,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:46,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949186539] [2024-06-27 21:35:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:46,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:49,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:49,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949186539] [2024-06-27 21:35:49,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949186539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:49,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:49,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:49,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812899025] [2024-06-27 21:35:49,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:49,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:49,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:49,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:49,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:49,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 204 transitions, 1928 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:49,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:49,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:49,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:50,991 INFO L124 PetriNetUnfolderBase]: 2142/3429 cut-off events. [2024-06-27 21:35:50,991 INFO L125 PetriNetUnfolderBase]: For 148444/148444 co-relation queries the response was YES. [2024-06-27 21:35:51,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20324 conditions, 3429 events. 2142/3429 cut-off events. For 148444/148444 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19183 event pairs, 584 based on Foata normal form. 4/3432 useless extension candidates. Maximal degree in co-relation 20244. Up to 3162 conditions per place. [2024-06-27 21:35:51,023 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 32 changer transitions 0/227 dead transitions. [2024-06-27 21:35:51,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 227 transitions, 2422 flow [2024-06-27 21:35:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-27 21:35:51,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-27 21:35:51,028 INFO L175 Difference]: Start difference. First operand has 174 places, 204 transitions, 1928 flow. Second operand 10 states and 152 transitions. [2024-06-27 21:35:51,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 227 transitions, 2422 flow [2024-06-27 21:35:51,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 227 transitions, 2356 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:51,248 INFO L231 Difference]: Finished difference. Result has 177 places, 204 transitions, 1932 flow [2024-06-27 21:35:51,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1932, PETRI_PLACES=177, PETRI_TRANSITIONS=204} [2024-06-27 21:35:51,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-27 21:35:51,249 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 204 transitions, 1932 flow [2024-06-27 21:35:51,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:51,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:51,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:51,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:35:51,250 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)] === [2024-06-27 21:35:51,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash 551162932, now seen corresponding path program 2 times [2024-06-27 21:35:51,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:51,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97967310] [2024-06-27 21:35:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:51,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:54,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:54,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97967310] [2024-06-27 21:35:54,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97967310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:54,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:54,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:54,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659723285] [2024-06-27 21:35:54,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:54,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:54,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:54,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:54,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:54,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:54,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 204 transitions, 1932 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:54,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:54,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:54,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:56,003 INFO L124 PetriNetUnfolderBase]: 2186/3493 cut-off events. [2024-06-27 21:35:56,003 INFO L125 PetriNetUnfolderBase]: For 164862/164862 co-relation queries the response was YES. [2024-06-27 21:35:56,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20841 conditions, 3493 events. 2186/3493 cut-off events. For 164862/164862 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19692 event pairs, 610 based on Foata normal form. 12/3502 useless extension candidates. Maximal degree in co-relation 20760. Up to 3180 conditions per place. [2024-06-27 21:35:56,041 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 186 selfloop transitions, 38 changer transitions 0/229 dead transitions. [2024-06-27 21:35:56,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 229 transitions, 2512 flow [2024-06-27 21:35:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:35:56,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:35:56,043 INFO L175 Difference]: Start difference. First operand has 177 places, 204 transitions, 1932 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:35:56,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 229 transitions, 2512 flow [2024-06-27 21:35:56,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 229 transitions, 2448 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:35:56,237 INFO L231 Difference]: Finished difference. Result has 176 places, 205 transitions, 1970 flow [2024-06-27 21:35:56,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1970, PETRI_PLACES=176, PETRI_TRANSITIONS=205} [2024-06-27 21:35:56,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 21:35:56,237 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 205 transitions, 1970 flow [2024-06-27 21:35:56,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:56,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:56,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:56,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:35:56,238 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)] === [2024-06-27 21:35:56,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash 563185042, now seen corresponding path program 3 times [2024-06-27 21:35:56,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:56,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623407442] [2024-06-27 21:35:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:56,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:00,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623407442] [2024-06-27 21:36:00,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623407442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:00,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:00,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:00,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108177977] [2024-06-27 21:36:00,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:00,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:00,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:00,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:00,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:00,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 205 transitions, 1970 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:00,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:00,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:00,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:01,618 INFO L124 PetriNetUnfolderBase]: 2230/3575 cut-off events. [2024-06-27 21:36:01,618 INFO L125 PetriNetUnfolderBase]: For 172085/172085 co-relation queries the response was YES. [2024-06-27 21:36:01,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21460 conditions, 3575 events. 2230/3575 cut-off events. For 172085/172085 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20245 event pairs, 624 based on Foata normal form. 12/3586 useless extension candidates. Maximal degree in co-relation 21378. Up to 3332 conditions per place. [2024-06-27 21:36:01,645 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 205 selfloop transitions, 17 changer transitions 0/227 dead transitions. [2024-06-27 21:36:01,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 227 transitions, 2522 flow [2024-06-27 21:36:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:36:01,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:36:01,647 INFO L175 Difference]: Start difference. First operand has 176 places, 205 transitions, 1970 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:36:01,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 227 transitions, 2522 flow [2024-06-27 21:36:01,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 227 transitions, 2442 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:01,826 INFO L231 Difference]: Finished difference. Result has 178 places, 206 transitions, 1952 flow [2024-06-27 21:36:01,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1952, PETRI_PLACES=178, PETRI_TRANSITIONS=206} [2024-06-27 21:36:01,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-27 21:36:01,826 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 206 transitions, 1952 flow [2024-06-27 21:36:01,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:01,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:01,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:01,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:36:01,827 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:01,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:01,827 INFO L85 PathProgramCache]: Analyzing trace with hash 964945042, now seen corresponding path program 4 times [2024-06-27 21:36:01,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:01,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497493730] [2024-06-27 21:36:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:01,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:05,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:05,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497493730] [2024-06-27 21:36:05,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497493730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:05,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:05,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:05,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670090363] [2024-06-27 21:36:05,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:05,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:05,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:05,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:05,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:05,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:05,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 206 transitions, 1952 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:05,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:05,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:05,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:06,709 INFO L124 PetriNetUnfolderBase]: 2232/3585 cut-off events. [2024-06-27 21:36:06,709 INFO L125 PetriNetUnfolderBase]: For 165826/165826 co-relation queries the response was YES. [2024-06-27 21:36:06,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21291 conditions, 3585 events. 2232/3585 cut-off events. For 165826/165826 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20261 event pairs, 600 based on Foata normal form. 8/3592 useless extension candidates. Maximal degree in co-relation 21208. Up to 3300 conditions per place. [2024-06-27 21:36:06,736 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 20 changer transitions 0/233 dead transitions. [2024-06-27 21:36:06,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 233 transitions, 2558 flow [2024-06-27 21:36:06,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 21:36:06,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 21:36:06,738 INFO L175 Difference]: Start difference. First operand has 178 places, 206 transitions, 1952 flow. Second operand 9 states and 141 transitions. [2024-06-27 21:36:06,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 233 transitions, 2558 flow [2024-06-27 21:36:06,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 233 transitions, 2518 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:06,954 INFO L231 Difference]: Finished difference. Result has 181 places, 207 transitions, 1980 flow [2024-06-27 21:36:06,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1980, PETRI_PLACES=181, PETRI_TRANSITIONS=207} [2024-06-27 21:36:06,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-27 21:36:06,955 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 207 transitions, 1980 flow [2024-06-27 21:36:06,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:06,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:06,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:06,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:36:06,955 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:06,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash 964951986, now seen corresponding path program 1 times [2024-06-27 21:36:06,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:06,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659936035] [2024-06-27 21:36:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:06,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:10,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:10,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659936035] [2024-06-27 21:36:10,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659936035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:10,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:10,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:10,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118154771] [2024-06-27 21:36:10,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:10,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:10,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:10,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:10,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:10,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:10,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 207 transitions, 1980 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:10,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:10,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:10,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:11,307 INFO L124 PetriNetUnfolderBase]: 2242/3591 cut-off events. [2024-06-27 21:36:11,308 INFO L125 PetriNetUnfolderBase]: For 160004/160004 co-relation queries the response was YES. [2024-06-27 21:36:11,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20964 conditions, 3591 events. 2242/3591 cut-off events. For 160004/160004 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20218 event pairs, 582 based on Foata normal form. 8/3598 useless extension candidates. Maximal degree in co-relation 20880. Up to 3288 conditions per place. [2024-06-27 21:36:11,341 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 24 changer transitions 0/237 dead transitions. [2024-06-27 21:36:11,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 237 transitions, 2573 flow [2024-06-27 21:36:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:36:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:36:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 21:36:11,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-27 21:36:11,360 INFO L175 Difference]: Start difference. First operand has 181 places, 207 transitions, 1980 flow. Second operand 10 states and 154 transitions. [2024-06-27 21:36:11,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 237 transitions, 2573 flow [2024-06-27 21:36:11,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 237 transitions, 2521 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:11,563 INFO L231 Difference]: Finished difference. Result has 185 places, 208 transitions, 2001 flow [2024-06-27 21:36:11,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2001, PETRI_PLACES=185, PETRI_TRANSITIONS=208} [2024-06-27 21:36:11,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 21:36:11,564 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 208 transitions, 2001 flow [2024-06-27 21:36:11,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:11,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:11,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:11,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:36:11,565 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:11,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:11,565 INFO L85 PathProgramCache]: Analyzing trace with hash -354153996, now seen corresponding path program 1 times [2024-06-27 21:36:11,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:11,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935292188] [2024-06-27 21:36:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:11,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:14,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:14,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935292188] [2024-06-27 21:36:14,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935292188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:14,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:14,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:14,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619113792] [2024-06-27 21:36:14,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:14,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:14,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:14,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:14,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:14,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:14,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 208 transitions, 2001 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:14,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:14,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:14,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:15,973 INFO L124 PetriNetUnfolderBase]: 2252/3613 cut-off events. [2024-06-27 21:36:15,973 INFO L125 PetriNetUnfolderBase]: For 156079/156079 co-relation queries the response was YES. [2024-06-27 21:36:15,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21150 conditions, 3613 events. 2252/3613 cut-off events. For 156079/156079 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20464 event pairs, 641 based on Foata normal form. 2/3614 useless extension candidates. Maximal degree in co-relation 21064. Up to 3350 conditions per place. [2024-06-27 21:36:16,003 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 207 selfloop transitions, 34 changer transitions 0/246 dead transitions. [2024-06-27 21:36:16,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 246 transitions, 2621 flow [2024-06-27 21:36:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:36:16,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:36:16,005 INFO L175 Difference]: Start difference. First operand has 185 places, 208 transitions, 2001 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:36:16,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 246 transitions, 2621 flow [2024-06-27 21:36:16,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 246 transitions, 2557 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 21:36:16,218 INFO L231 Difference]: Finished difference. Result has 185 places, 211 transitions, 2071 flow [2024-06-27 21:36:16,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2071, PETRI_PLACES=185, PETRI_TRANSITIONS=211} [2024-06-27 21:36:16,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 21:36:16,219 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 211 transitions, 2071 flow [2024-06-27 21:36:16,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:16,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:16,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:16,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:36:16,219 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:16,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash -357013932, now seen corresponding path program 1 times [2024-06-27 21:36:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:16,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434101294] [2024-06-27 21:36:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:16,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:18,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:18,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434101294] [2024-06-27 21:36:18,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434101294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:18,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:18,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:18,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049231774] [2024-06-27 21:36:18,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:18,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:18,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:18,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:18,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 211 transitions, 2071 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:18,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:18,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:18,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:20,222 INFO L124 PetriNetUnfolderBase]: 2260/3625 cut-off events. [2024-06-27 21:36:20,222 INFO L125 PetriNetUnfolderBase]: For 162495/162495 co-relation queries the response was YES. [2024-06-27 21:36:20,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21437 conditions, 3625 events. 2260/3625 cut-off events. For 162495/162495 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20442 event pairs, 549 based on Foata normal form. 2/3626 useless extension candidates. Maximal degree in co-relation 21351. Up to 3347 conditions per place. [2024-06-27 21:36:20,254 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 218 selfloop transitions, 28 changer transitions 0/251 dead transitions. [2024-06-27 21:36:20,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 251 transitions, 2833 flow [2024-06-27 21:36:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:36:20,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:36:20,256 INFO L175 Difference]: Start difference. First operand has 185 places, 211 transitions, 2071 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:36:20,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 251 transitions, 2833 flow [2024-06-27 21:36:20,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 251 transitions, 2679 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:20,523 INFO L231 Difference]: Finished difference. Result has 187 places, 215 transitions, 2054 flow [2024-06-27 21:36:20,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2054, PETRI_PLACES=187, PETRI_TRANSITIONS=215} [2024-06-27 21:36:20,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 21:36:20,524 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 215 transitions, 2054 flow [2024-06-27 21:36:20,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:20,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:20,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:20,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:36:20,525 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)] === [2024-06-27 21:36:20,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:20,525 INFO L85 PathProgramCache]: Analyzing trace with hash 878154802, now seen corresponding path program 2 times [2024-06-27 21:36:20,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:20,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906577545] [2024-06-27 21:36:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:20,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:23,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:23,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906577545] [2024-06-27 21:36:23,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906577545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:23,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:23,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:23,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118860316] [2024-06-27 21:36:23,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:23,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:23,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:23,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:23,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:23,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 215 transitions, 2054 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:23,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:23,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:23,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:25,246 INFO L124 PetriNetUnfolderBase]: 2273/3646 cut-off events. [2024-06-27 21:36:25,246 INFO L125 PetriNetUnfolderBase]: For 167975/167975 co-relation queries the response was YES. [2024-06-27 21:36:25,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21574 conditions, 3646 events. 2273/3646 cut-off events. For 167975/167975 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20648 event pairs, 647 based on Foata normal form. 2/3647 useless extension candidates. Maximal degree in co-relation 21489. Up to 3416 conditions per place. [2024-06-27 21:36:25,279 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 217 selfloop transitions, 28 changer transitions 0/250 dead transitions. [2024-06-27 21:36:25,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 250 transitions, 2690 flow [2024-06-27 21:36:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:36:25,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:36:25,280 INFO L175 Difference]: Start difference. First operand has 187 places, 215 transitions, 2054 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:36:25,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 250 transitions, 2690 flow [2024-06-27 21:36:25,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 250 transitions, 2608 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:25,502 INFO L231 Difference]: Finished difference. Result has 191 places, 220 transitions, 2111 flow [2024-06-27 21:36:25,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2111, PETRI_PLACES=191, PETRI_TRANSITIONS=220} [2024-06-27 21:36:25,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-27 21:36:25,503 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 220 transitions, 2111 flow [2024-06-27 21:36:25,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:25,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:25,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:25,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:36:25,503 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:25,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:25,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1161735792, now seen corresponding path program 2 times [2024-06-27 21:36:25,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:25,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758013346] [2024-06-27 21:36:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:25,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:28,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:28,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758013346] [2024-06-27 21:36:28,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758013346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:28,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:28,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:28,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101317435] [2024-06-27 21:36:28,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:28,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:28,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:28,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:28,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:28,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:28,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 220 transitions, 2111 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:28,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:28,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:28,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:29,852 INFO L124 PetriNetUnfolderBase]: 2299/3688 cut-off events. [2024-06-27 21:36:29,852 INFO L125 PetriNetUnfolderBase]: For 177126/177128 co-relation queries the response was YES. [2024-06-27 21:36:29,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22052 conditions, 3688 events. 2299/3688 cut-off events. For 177126/177128 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20929 event pairs, 524 based on Foata normal form. 4/3691 useless extension candidates. Maximal degree in co-relation 21965. Up to 3178 conditions per place. [2024-06-27 21:36:29,882 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 72 changer transitions 0/265 dead transitions. [2024-06-27 21:36:29,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 265 transitions, 3133 flow [2024-06-27 21:36:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:36:29,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:36:29,884 INFO L175 Difference]: Start difference. First operand has 191 places, 220 transitions, 2111 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:36:29,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 265 transitions, 3133 flow [2024-06-27 21:36:30,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 265 transitions, 3060 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:30,175 INFO L231 Difference]: Finished difference. Result has 194 places, 229 transitions, 2380 flow [2024-06-27 21:36:30,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2380, PETRI_PLACES=194, PETRI_TRANSITIONS=229} [2024-06-27 21:36:30,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-27 21:36:30,176 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 229 transitions, 2380 flow [2024-06-27 21:36:30,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:30,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:30,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:30,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:36:30,177 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:30,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1171258992, now seen corresponding path program 3 times [2024-06-27 21:36:30,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:30,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025396767] [2024-06-27 21:36:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:30,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:32,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:32,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025396767] [2024-06-27 21:36:32,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025396767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:32,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:32,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:32,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861679714] [2024-06-27 21:36:32,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:32,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:32,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:32,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:32,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:33,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:33,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 229 transitions, 2380 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:33,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:33,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:33,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:34,303 INFO L124 PetriNetUnfolderBase]: 2309/3706 cut-off events. [2024-06-27 21:36:34,303 INFO L125 PetriNetUnfolderBase]: For 185493/185495 co-relation queries the response was YES. [2024-06-27 21:36:34,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22747 conditions, 3706 events. 2309/3706 cut-off events. For 185493/185495 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21047 event pairs, 529 based on Foata normal form. 4/3709 useless extension candidates. Maximal degree in co-relation 22659. Up to 3188 conditions per place. [2024-06-27 21:36:34,336 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 74 changer transitions 0/264 dead transitions. [2024-06-27 21:36:34,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 264 transitions, 3276 flow [2024-06-27 21:36:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:36:34,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 21:36:34,338 INFO L175 Difference]: Start difference. First operand has 194 places, 229 transitions, 2380 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:36:34,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 264 transitions, 3276 flow [2024-06-27 21:36:34,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 264 transitions, 3101 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:34,611 INFO L231 Difference]: Finished difference. Result has 199 places, 232 transitions, 2427 flow [2024-06-27 21:36:34,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2427, PETRI_PLACES=199, PETRI_TRANSITIONS=232} [2024-06-27 21:36:34,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-27 21:36:34,613 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 232 transitions, 2427 flow [2024-06-27 21:36:34,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:34,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:34,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:34,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:36:34,614 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:34,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:34,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1452189296, now seen corresponding path program 4 times [2024-06-27 21:36:34,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:34,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197612608] [2024-06-27 21:36:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:34,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:37,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:37,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197612608] [2024-06-27 21:36:37,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197612608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:37,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:37,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:37,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027254380] [2024-06-27 21:36:37,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:37,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:37,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:37,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:37,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:37,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:37,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 232 transitions, 2427 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:37,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:37,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:37,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:38,709 INFO L124 PetriNetUnfolderBase]: 2319/3726 cut-off events. [2024-06-27 21:36:38,709 INFO L125 PetriNetUnfolderBase]: For 190268/190268 co-relation queries the response was YES. [2024-06-27 21:36:38,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22977 conditions, 3726 events. 2319/3726 cut-off events. For 190268/190268 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21284 event pairs, 652 based on Foata normal form. 2/3727 useless extension candidates. Maximal degree in co-relation 22887. Up to 3464 conditions per place. [2024-06-27 21:36:38,739 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 220 selfloop transitions, 34 changer transitions 0/259 dead transitions. [2024-06-27 21:36:38,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 259 transitions, 3042 flow [2024-06-27 21:36:38,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:36:38,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:36:38,741 INFO L175 Difference]: Start difference. First operand has 199 places, 232 transitions, 2427 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:36:38,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 259 transitions, 3042 flow [2024-06-27 21:36:38,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 259 transitions, 2899 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:38,983 INFO L231 Difference]: Finished difference. Result has 202 places, 235 transitions, 2406 flow [2024-06-27 21:36:38,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2406, PETRI_PLACES=202, PETRI_TRANSITIONS=235} [2024-06-27 21:36:38,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-27 21:36:38,983 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 235 transitions, 2406 flow [2024-06-27 21:36:38,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:38,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:38,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:38,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:36:38,984 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:38,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:38,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1447424720, now seen corresponding path program 3 times [2024-06-27 21:36:38,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:38,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279149660] [2024-06-27 21:36:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:38,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:42,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:42,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279149660] [2024-06-27 21:36:42,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279149660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:42,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:42,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:42,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108821268] [2024-06-27 21:36:42,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:42,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:42,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:42,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:42,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:42,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:42,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 235 transitions, 2406 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:42,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:42,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:42,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:43,569 INFO L124 PetriNetUnfolderBase]: 2327/3738 cut-off events. [2024-06-27 21:36:43,570 INFO L125 PetriNetUnfolderBase]: For 195848/195848 co-relation queries the response was YES. [2024-06-27 21:36:43,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22961 conditions, 3738 events. 2327/3738 cut-off events. For 195848/195848 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21382 event pairs, 658 based on Foata normal form. 2/3739 useless extension candidates. Maximal degree in co-relation 22870. Up to 3492 conditions per place. [2024-06-27 21:36:43,603 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 227 selfloop transitions, 28 changer transitions 0/260 dead transitions. [2024-06-27 21:36:43,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 260 transitions, 3013 flow [2024-06-27 21:36:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:36:43,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 21:36:43,605 INFO L175 Difference]: Start difference. First operand has 202 places, 235 transitions, 2406 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:36:43,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 260 transitions, 3013 flow [2024-06-27 21:36:43,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 260 transitions, 2925 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:43,821 INFO L231 Difference]: Finished difference. Result has 205 places, 238 transitions, 2438 flow [2024-06-27 21:36:43,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2438, PETRI_PLACES=205, PETRI_TRANSITIONS=238} [2024-06-27 21:36:43,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-27 21:36:43,822 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 238 transitions, 2438 flow [2024-06-27 21:36:43,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:43,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:43,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:43,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:36:43,823 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:43,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1168408976, now seen corresponding path program 1 times [2024-06-27 21:36:43,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:43,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419117029] [2024-06-27 21:36:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:43,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:46,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419117029] [2024-06-27 21:36:46,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419117029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:46,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:46,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:46,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525394801] [2024-06-27 21:36:46,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:46,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:46,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:46,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:46,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:46,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:46,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 238 transitions, 2438 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:46,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:46,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:46,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:48,281 INFO L124 PetriNetUnfolderBase]: 2348/3765 cut-off events. [2024-06-27 21:36:48,281 INFO L125 PetriNetUnfolderBase]: For 205680/205682 co-relation queries the response was YES. [2024-06-27 21:36:48,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23345 conditions, 3765 events. 2348/3765 cut-off events. For 205680/205682 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21472 event pairs, 549 based on Foata normal form. 4/3768 useless extension candidates. Maximal degree in co-relation 23252. Up to 3384 conditions per place. [2024-06-27 21:36:48,321 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 223 selfloop transitions, 49 changer transitions 0/277 dead transitions. [2024-06-27 21:36:48,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 277 transitions, 3248 flow [2024-06-27 21:36:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:36:48,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:36:48,323 INFO L175 Difference]: Start difference. First operand has 205 places, 238 transitions, 2438 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:36:48,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 277 transitions, 3248 flow [2024-06-27 21:36:48,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 277 transitions, 3169 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:48,690 INFO L231 Difference]: Finished difference. Result has 208 places, 242 transitions, 2526 flow [2024-06-27 21:36:48,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2359, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2526, PETRI_PLACES=208, PETRI_TRANSITIONS=242} [2024-06-27 21:36:48,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 21:36:48,691 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 242 transitions, 2526 flow [2024-06-27 21:36:48,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:48,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:48,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:48,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:36:48,692 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:48,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:48,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1168469426, now seen corresponding path program 2 times [2024-06-27 21:36:48,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:48,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790794029] [2024-06-27 21:36:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:48,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:52,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:52,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790794029] [2024-06-27 21:36:52,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790794029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:52,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:52,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:52,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129053395] [2024-06-27 21:36:52,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:52,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:52,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:52,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:52,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:52,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:52,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 242 transitions, 2526 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:52,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:52,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:52,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:53,543 INFO L124 PetriNetUnfolderBase]: 2356/3783 cut-off events. [2024-06-27 21:36:53,544 INFO L125 PetriNetUnfolderBase]: For 212130/212132 co-relation queries the response was YES. [2024-06-27 21:36:53,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23720 conditions, 3783 events. 2356/3783 cut-off events. For 212130/212132 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21605 event pairs, 557 based on Foata normal form. 4/3786 useless extension candidates. Maximal degree in co-relation 23626. Up to 3433 conditions per place. [2024-06-27 21:36:53,586 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 223 selfloop transitions, 46 changer transitions 0/274 dead transitions. [2024-06-27 21:36:53,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 274 transitions, 3168 flow [2024-06-27 21:36:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:53,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:36:53,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:36:53,587 INFO L175 Difference]: Start difference. First operand has 208 places, 242 transitions, 2526 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:36:53,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 274 transitions, 3168 flow [2024-06-27 21:36:53,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 274 transitions, 3058 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:53,826 INFO L231 Difference]: Finished difference. Result has 212 places, 244 transitions, 2551 flow [2024-06-27 21:36:53,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2551, PETRI_PLACES=212, PETRI_TRANSITIONS=244} [2024-06-27 21:36:53,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-27 21:36:53,826 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 244 transitions, 2551 flow [2024-06-27 21:36:53,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:53,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:53,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:53,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:36:53,827 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)] === [2024-06-27 21:36:53,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:53,827 INFO L85 PathProgramCache]: Analyzing trace with hash 51597622, now seen corresponding path program 3 times [2024-06-27 21:36:53,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:53,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004616021] [2024-06-27 21:36:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:53,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:57,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004616021] [2024-06-27 21:36:57,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004616021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:57,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:57,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:57,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290562269] [2024-06-27 21:36:57,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:57,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:57,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:57,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:57,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:57,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:57,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 244 transitions, 2551 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:57,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:57,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:57,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:58,422 INFO L124 PetriNetUnfolderBase]: 2400/3847 cut-off events. [2024-06-27 21:36:58,422 INFO L125 PetriNetUnfolderBase]: For 238991/238991 co-relation queries the response was YES. [2024-06-27 21:36:58,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24272 conditions, 3847 events. 2400/3847 cut-off events. For 238991/238991 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22023 event pairs, 657 based on Foata normal form. 12/3858 useless extension candidates. Maximal degree in co-relation 24176. Up to 3547 conditions per place. [2024-06-27 21:36:58,454 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 34 changer transitions 0/274 dead transitions. [2024-06-27 21:36:58,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 274 transitions, 3239 flow [2024-06-27 21:36:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:36:58,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 21:36:58,456 INFO L175 Difference]: Start difference. First operand has 212 places, 244 transitions, 2551 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:36:58,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 274 transitions, 3239 flow [2024-06-27 21:36:58,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 274 transitions, 3140 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:58,848 INFO L231 Difference]: Finished difference. Result has 214 places, 247 transitions, 2574 flow [2024-06-27 21:36:58,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2574, PETRI_PLACES=214, PETRI_TRANSITIONS=247} [2024-06-27 21:36:58,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 21:36:58,848 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 247 transitions, 2574 flow [2024-06-27 21:36:58,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:58,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:58,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:58,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:36:58,849 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)] === [2024-06-27 21:36:58,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:58,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1408735632, now seen corresponding path program 5 times [2024-06-27 21:36:58,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:58,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923799401] [2024-06-27 21:36:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:58,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:01,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923799401] [2024-06-27 21:37:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923799401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:01,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:01,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:01,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974761034] [2024-06-27 21:37:01,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:01,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:01,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:01,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:01,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 247 transitions, 2574 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:01,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:01,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:01,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:03,163 INFO L124 PetriNetUnfolderBase]: 2410/3853 cut-off events. [2024-06-27 21:37:03,163 INFO L125 PetriNetUnfolderBase]: For 225033/225033 co-relation queries the response was YES. [2024-06-27 21:37:03,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24469 conditions, 3853 events. 2410/3853 cut-off events. For 225033/225033 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22036 event pairs, 555 based on Foata normal form. 2/3852 useless extension candidates. Maximal degree in co-relation 24372. Up to 3331 conditions per place. [2024-06-27 21:37:03,200 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 195 selfloop transitions, 81 changer transitions 0/281 dead transitions. [2024-06-27 21:37:03,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 281 transitions, 3514 flow [2024-06-27 21:37:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:03,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:37:03,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:37:03,202 INFO L175 Difference]: Start difference. First operand has 214 places, 247 transitions, 2574 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:37:03,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 281 transitions, 3514 flow [2024-06-27 21:37:03,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 281 transitions, 3440 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:03,496 INFO L231 Difference]: Finished difference. Result has 216 places, 250 transitions, 2724 flow [2024-06-27 21:37:03,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2724, PETRI_PLACES=216, PETRI_TRANSITIONS=250} [2024-06-27 21:37:03,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 21:37:03,497 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 250 transitions, 2724 flow [2024-06-27 21:37:03,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:03,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:03,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:03,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:37:03,497 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)] === [2024-06-27 21:37:03,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:03,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1399212432, now seen corresponding path program 6 times [2024-06-27 21:37:03,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:03,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875543027] [2024-06-27 21:37:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:03,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:06,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:06,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875543027] [2024-06-27 21:37:06,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875543027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:06,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:06,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:06,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615328879] [2024-06-27 21:37:06,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:06,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:06,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:06,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:06,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:06,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:06,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 250 transitions, 2724 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:06,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:06,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:06,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:07,639 INFO L124 PetriNetUnfolderBase]: 2420/3871 cut-off events. [2024-06-27 21:37:07,640 INFO L125 PetriNetUnfolderBase]: For 231912/231912 co-relation queries the response was YES. [2024-06-27 21:37:07,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24866 conditions, 3871 events. 2420/3871 cut-off events. For 231912/231912 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22224 event pairs, 555 based on Foata normal form. 2/3870 useless extension candidates. Maximal degree in co-relation 24768. Up to 3341 conditions per place. [2024-06-27 21:37:07,680 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 82 changer transitions 0/280 dead transitions. [2024-06-27 21:37:07,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 280 transitions, 3662 flow [2024-06-27 21:37:07,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:37:07,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 21:37:07,682 INFO L175 Difference]: Start difference. First operand has 216 places, 250 transitions, 2724 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:37:07,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 280 transitions, 3662 flow [2024-06-27 21:37:08,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 280 transitions, 3388 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:08,176 INFO L231 Difference]: Finished difference. Result has 218 places, 253 transitions, 2682 flow [2024-06-27 21:37:08,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2476, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2682, PETRI_PLACES=218, PETRI_TRANSITIONS=253} [2024-06-27 21:37:08,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 21:37:08,176 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 253 transitions, 2682 flow [2024-06-27 21:37:08,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:08,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:08,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:08,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:37:08,177 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)] === [2024-06-27 21:37:08,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash -452188270, now seen corresponding path program 7 times [2024-06-27 21:37:08,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:08,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475279818] [2024-06-27 21:37:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:08,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:10,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:10,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475279818] [2024-06-27 21:37:10,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475279818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:10,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:10,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:10,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048715771] [2024-06-27 21:37:10,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:10,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:10,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:10,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:10,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 253 transitions, 2682 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:10,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:10,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:10,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:12,310 INFO L124 PetriNetUnfolderBase]: 2430/3889 cut-off events. [2024-06-27 21:37:12,310 INFO L125 PetriNetUnfolderBase]: For 237230/237230 co-relation queries the response was YES. [2024-06-27 21:37:12,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24889 conditions, 3889 events. 2430/3889 cut-off events. For 237230/237230 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22347 event pairs, 562 based on Foata normal form. 2/3888 useless extension candidates. Maximal degree in co-relation 24790. Up to 3351 conditions per place. [2024-06-27 21:37:12,345 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 186 selfloop transitions, 87 changer transitions 0/278 dead transitions. [2024-06-27 21:37:12,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 278 transitions, 3454 flow [2024-06-27 21:37:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:37:12,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:37:12,348 INFO L175 Difference]: Start difference. First operand has 218 places, 253 transitions, 2682 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:37:12,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 278 transitions, 3454 flow [2024-06-27 21:37:12,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 278 transitions, 3282 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:12,869 INFO L231 Difference]: Finished difference. Result has 221 places, 256 transitions, 2732 flow [2024-06-27 21:37:12,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2732, PETRI_PLACES=221, PETRI_TRANSITIONS=256} [2024-06-27 21:37:12,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-27 21:37:12,870 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 256 transitions, 2732 flow [2024-06-27 21:37:12,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:12,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:12,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:12,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:37:12,872 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)] === [2024-06-27 21:37:12,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:12,873 INFO L85 PathProgramCache]: Analyzing trace with hash 61490344, now seen corresponding path program 8 times [2024-06-27 21:37:12,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:12,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939010353] [2024-06-27 21:37:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:12,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:15,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:15,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939010353] [2024-06-27 21:37:15,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939010353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:15,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:15,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098867599] [2024-06-27 21:37:15,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:15,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:15,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:15,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:15,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:15,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:15,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 256 transitions, 2732 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:15,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:15,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:15,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:16,977 INFO L124 PetriNetUnfolderBase]: 2424/3881 cut-off events. [2024-06-27 21:37:16,978 INFO L125 PetriNetUnfolderBase]: For 239136/239136 co-relation queries the response was YES. [2024-06-27 21:37:17,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24792 conditions, 3881 events. 2424/3881 cut-off events. For 239136/239136 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22362 event pairs, 668 based on Foata normal form. 2/3880 useless extension candidates. Maximal degree in co-relation 24692. Up to 3576 conditions per place. [2024-06-27 21:37:17,017 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 221 selfloop transitions, 50 changer transitions 0/276 dead transitions. [2024-06-27 21:37:17,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 276 transitions, 3454 flow [2024-06-27 21:37:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:37:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:37:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 21:37:17,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-27 21:37:17,019 INFO L175 Difference]: Start difference. First operand has 221 places, 256 transitions, 2732 flow. Second operand 10 states and 157 transitions. [2024-06-27 21:37:17,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 276 transitions, 3454 flow [2024-06-27 21:37:17,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 276 transitions, 3287 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:17,543 INFO L231 Difference]: Finished difference. Result has 226 places, 256 transitions, 2671 flow [2024-06-27 21:37:17,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2671, PETRI_PLACES=226, PETRI_TRANSITIONS=256} [2024-06-27 21:37:17,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-27 21:37:17,544 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 256 transitions, 2671 flow [2024-06-27 21:37:17,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:17,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:17,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:17,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:37:17,545 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:17,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:17,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1715219072, now seen corresponding path program 9 times [2024-06-27 21:37:17,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:17,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802920662] [2024-06-27 21:37:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:17,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:20,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:20,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802920662] [2024-06-27 21:37:20,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802920662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:20,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:20,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:20,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674823043] [2024-06-27 21:37:20,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:20,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:20,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:20,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:20,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:20,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:20,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 256 transitions, 2671 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:20,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:20,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:20,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:21,513 INFO L124 PetriNetUnfolderBase]: 2418/3873 cut-off events. [2024-06-27 21:37:21,513 INFO L125 PetriNetUnfolderBase]: For 240494/240494 co-relation queries the response was YES. [2024-06-27 21:37:21,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24502 conditions, 3873 events. 2418/3873 cut-off events. For 240494/240494 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22360 event pairs, 670 based on Foata normal form. 2/3872 useless extension candidates. Maximal degree in co-relation 24401. Up to 3571 conditions per place. [2024-06-27 21:37:21,545 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 49 changer transitions 0/272 dead transitions. [2024-06-27 21:37:21,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 272 transitions, 3241 flow [2024-06-27 21:37:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:37:21,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:37:21,547 INFO L175 Difference]: Start difference. First operand has 226 places, 256 transitions, 2671 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:37:21,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 272 transitions, 3241 flow [2024-06-27 21:37:21,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 272 transitions, 3005 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-27 21:37:21,915 INFO L231 Difference]: Finished difference. Result has 223 places, 256 transitions, 2539 flow [2024-06-27 21:37:21,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2539, PETRI_PLACES=223, PETRI_TRANSITIONS=256} [2024-06-27 21:37:21,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 21:37:21,916 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 256 transitions, 2539 flow [2024-06-27 21:37:21,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:21,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:21,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:21,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:37:21,916 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:21,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:21,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1731964208, now seen corresponding path program 4 times [2024-06-27 21:37:21,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:21,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318637709] [2024-06-27 21:37:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:21,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:24,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:24,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318637709] [2024-06-27 21:37:24,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318637709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:24,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:24,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:24,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115658747] [2024-06-27 21:37:24,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:24,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:24,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:24,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:24,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:24,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:24,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 256 transitions, 2539 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:24,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:24,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:24,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:25,983 INFO L124 PetriNetUnfolderBase]: 2413/3866 cut-off events. [2024-06-27 21:37:25,984 INFO L125 PetriNetUnfolderBase]: For 240404/240404 co-relation queries the response was YES. [2024-06-27 21:37:26,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24269 conditions, 3866 events. 2413/3866 cut-off events. For 240404/240404 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22299 event pairs, 687 based on Foata normal form. 2/3865 useless extension candidates. Maximal degree in co-relation 24167. Up to 3622 conditions per place. [2024-06-27 21:37:26,025 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 237 selfloop transitions, 28 changer transitions 0/270 dead transitions. [2024-06-27 21:37:26,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 270 transitions, 3101 flow [2024-06-27 21:37:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 21:37:26,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-27 21:37:26,032 INFO L175 Difference]: Start difference. First operand has 223 places, 256 transitions, 2539 flow. Second operand 8 states and 123 transitions. [2024-06-27 21:37:26,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 270 transitions, 3101 flow [2024-06-27 21:37:26,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 270 transitions, 2965 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 21:37:26,351 INFO L231 Difference]: Finished difference. Result has 223 places, 256 transitions, 2464 flow [2024-06-27 21:37:26,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2403, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2464, PETRI_PLACES=223, PETRI_TRANSITIONS=256} [2024-06-27 21:37:26,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 21:37:26,352 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 256 transitions, 2464 flow [2024-06-27 21:37:26,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:26,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:26,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:26,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:37:26,353 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:26,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:26,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2040481230, now seen corresponding path program 4 times [2024-06-27 21:37:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:26,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392073252] [2024-06-27 21:37:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:26,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:29,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:29,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392073252] [2024-06-27 21:37:29,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392073252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:29,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:29,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:29,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774160562] [2024-06-27 21:37:29,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:29,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:29,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:29,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:29,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:29,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:29,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 256 transitions, 2464 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:29,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:29,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:29,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:30,543 INFO L124 PetriNetUnfolderBase]: 2434/3898 cut-off events. [2024-06-27 21:37:30,543 INFO L125 PetriNetUnfolderBase]: For 251531/251531 co-relation queries the response was YES. [2024-06-27 21:37:30,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24595 conditions, 3898 events. 2434/3898 cut-off events. For 251531/251531 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22434 event pairs, 558 based on Foata normal form. 2/3898 useless extension candidates. Maximal degree in co-relation 24492. Up to 3514 conditions per place. [2024-06-27 21:37:30,579 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 236 selfloop transitions, 49 changer transitions 0/290 dead transitions. [2024-06-27 21:37:30,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 290 transitions, 3318 flow [2024-06-27 21:37:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:37:30,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:37:30,580 INFO L175 Difference]: Start difference. First operand has 223 places, 256 transitions, 2464 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:37:30,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 290 transitions, 3318 flow [2024-06-27 21:37:30,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 290 transitions, 3221 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 21:37:30,991 INFO L231 Difference]: Finished difference. Result has 223 places, 260 transitions, 2546 flow [2024-06-27 21:37:30,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2546, PETRI_PLACES=223, PETRI_TRANSITIONS=260} [2024-06-27 21:37:30,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 21:37:30,992 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 260 transitions, 2546 flow [2024-06-27 21:37:30,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:30,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:30,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:30,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:37:30,992 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:30,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1180356958, now seen corresponding path program 5 times [2024-06-27 21:37:30,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:30,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323118168] [2024-06-27 21:37:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:30,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:34,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323118168] [2024-06-27 21:37:34,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323118168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:34,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:34,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:34,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715618288] [2024-06-27 21:37:34,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:34,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:34,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:34,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:34,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:34,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:34,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 260 transitions, 2546 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:34,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:34,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:34,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:35,897 INFO L124 PetriNetUnfolderBase]: 2442/3916 cut-off events. [2024-06-27 21:37:35,897 INFO L125 PetriNetUnfolderBase]: For 259180/259180 co-relation queries the response was YES. [2024-06-27 21:37:35,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24969 conditions, 3916 events. 2442/3916 cut-off events. For 259180/259180 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22542 event pairs, 566 based on Foata normal form. 2/3916 useless extension candidates. Maximal degree in co-relation 24866. Up to 3563 conditions per place. [2024-06-27 21:37:35,931 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 236 selfloop transitions, 46 changer transitions 0/287 dead transitions. [2024-06-27 21:37:35,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 287 transitions, 3208 flow [2024-06-27 21:37:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:37:35,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 21:37:35,933 INFO L175 Difference]: Start difference. First operand has 223 places, 260 transitions, 2546 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:37:35,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 287 transitions, 3208 flow [2024-06-27 21:37:36,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 287 transitions, 3084 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:36,277 INFO L231 Difference]: Finished difference. Result has 227 places, 262 transitions, 2563 flow [2024-06-27 21:37:36,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2563, PETRI_PLACES=227, PETRI_TRANSITIONS=262} [2024-06-27 21:37:36,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-27 21:37:36,277 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 262 transitions, 2563 flow [2024-06-27 21:37:36,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:36,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:36,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:36,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:37:36,278 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)] === [2024-06-27 21:37:36,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:36,278 INFO L85 PathProgramCache]: Analyzing trace with hash -557500106, now seen corresponding path program 6 times [2024-06-27 21:37:36,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:36,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962811889] [2024-06-27 21:37:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:36,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:39,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:39,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962811889] [2024-06-27 21:37:39,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962811889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:39,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:39,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:39,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796983428] [2024-06-27 21:37:39,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:39,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:39,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:39,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:39,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:39,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:39,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 262 transitions, 2563 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:39,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:39,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:39,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:40,323 INFO L124 PetriNetUnfolderBase]: 2450/3932 cut-off events. [2024-06-27 21:37:40,323 INFO L125 PetriNetUnfolderBase]: For 265148/265148 co-relation queries the response was YES. [2024-06-27 21:37:40,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25161 conditions, 3932 events. 2450/3932 cut-off events. For 265148/265148 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 22679 event pairs, 483 based on Foata normal form. 2/3932 useless extension candidates. Maximal degree in co-relation 25056. Up to 3386 conditions per place. [2024-06-27 21:37:40,361 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 229 selfloop transitions, 67 changer transitions 0/301 dead transitions. [2024-06-27 21:37:40,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 301 transitions, 3651 flow [2024-06-27 21:37:40,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:37:40,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 21:37:40,362 INFO L175 Difference]: Start difference. First operand has 227 places, 262 transitions, 2563 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:37:40,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 301 transitions, 3651 flow [2024-06-27 21:37:40,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 301 transitions, 3550 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:40,842 INFO L231 Difference]: Finished difference. Result has 230 places, 270 transitions, 2775 flow [2024-06-27 21:37:40,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2462, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2775, PETRI_PLACES=230, PETRI_TRANSITIONS=270} [2024-06-27 21:37:40,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-27 21:37:40,843 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 270 transitions, 2775 flow [2024-06-27 21:37:40,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:40,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:40,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:40,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:37:40,844 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)] === [2024-06-27 21:37:40,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1743953520, now seen corresponding path program 7 times [2024-06-27 21:37:40,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:40,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059084898] [2024-06-27 21:37:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:40,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:44,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:44,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059084898] [2024-06-27 21:37:44,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059084898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:44,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:44,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:44,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456967022] [2024-06-27 21:37:44,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:44,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:44,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:44,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:44,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:44,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 270 transitions, 2775 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:44,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:44,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:44,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:45,628 INFO L124 PetriNetUnfolderBase]: 2458/3948 cut-off events. [2024-06-27 21:37:45,628 INFO L125 PetriNetUnfolderBase]: For 273136/273136 co-relation queries the response was YES. [2024-06-27 21:37:45,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25735 conditions, 3948 events. 2458/3948 cut-off events. For 273136/273136 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 22829 event pairs, 486 based on Foata normal form. 2/3948 useless extension candidates. Maximal degree in co-relation 25628. Up to 3394 conditions per place. [2024-06-27 21:37:45,667 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 224 selfloop transitions, 70 changer transitions 0/299 dead transitions. [2024-06-27 21:37:45,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 299 transitions, 3640 flow [2024-06-27 21:37:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:37:45,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:37:45,669 INFO L175 Difference]: Start difference. First operand has 230 places, 270 transitions, 2775 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:37:45,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 299 transitions, 3640 flow [2024-06-27 21:37:46,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 299 transitions, 3478 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:46,239 INFO L231 Difference]: Finished difference. Result has 235 places, 273 transitions, 2827 flow [2024-06-27 21:37:46,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2827, PETRI_PLACES=235, PETRI_TRANSITIONS=273} [2024-06-27 21:37:46,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-27 21:37:46,240 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 273 transitions, 2827 flow [2024-06-27 21:37:46,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:46,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:46,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:46,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:37:46,241 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)] === [2024-06-27 21:37:46,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:46,241 INFO L85 PathProgramCache]: Analyzing trace with hash -554729636, now seen corresponding path program 8 times [2024-06-27 21:37:46,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:46,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385066067] [2024-06-27 21:37:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:46,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:49,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:49,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385066067] [2024-06-27 21:37:49,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385066067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:49,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:49,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:49,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76728484] [2024-06-27 21:37:49,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:49,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:49,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:49,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:49,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:49,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:49,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 273 transitions, 2827 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:49,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:49,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:49,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:50,879 INFO L124 PetriNetUnfolderBase]: 2466/3960 cut-off events. [2024-06-27 21:37:50,879 INFO L125 PetriNetUnfolderBase]: For 278695/278695 co-relation queries the response was YES. [2024-06-27 21:37:50,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25865 conditions, 3960 events. 2466/3960 cut-off events. For 278695/278695 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22991 event pairs, 574 based on Foata normal form. 2/3960 useless extension candidates. Maximal degree in co-relation 25756. Up to 3599 conditions per place. [2024-06-27 21:37:50,919 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 245 selfloop transitions, 46 changer transitions 0/296 dead transitions. [2024-06-27 21:37:50,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 296 transitions, 3491 flow [2024-06-27 21:37:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:37:50,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 21:37:50,921 INFO L175 Difference]: Start difference. First operand has 235 places, 273 transitions, 2827 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:37:50,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 296 transitions, 3491 flow [2024-06-27 21:37:51,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 296 transitions, 3375 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:51,439 INFO L231 Difference]: Finished difference. Result has 239 places, 275 transitions, 2846 flow [2024-06-27 21:37:51,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2846, PETRI_PLACES=239, PETRI_TRANSITIONS=275} [2024-06-27 21:37:51,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 21:37:51,440 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 275 transitions, 2846 flow [2024-06-27 21:37:51,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:51,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:51,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:51,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:37:51,440 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)] === [2024-06-27 21:37:51,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:51,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1685861070, now seen corresponding path program 9 times [2024-06-27 21:37:51,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:51,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401687274] [2024-06-27 21:37:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:51,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:54,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401687274] [2024-06-27 21:37:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401687274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:54,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:54,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:54,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217467746] [2024-06-27 21:37:54,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:54,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:54,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:54,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:54,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:55,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:55,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 275 transitions, 2846 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:55,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:55,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:55,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:56,445 INFO L124 PetriNetUnfolderBase]: 2474/3976 cut-off events. [2024-06-27 21:37:56,445 INFO L125 PetriNetUnfolderBase]: For 285084/285084 co-relation queries the response was YES. [2024-06-27 21:37:56,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25904 conditions, 3976 events. 2474/3976 cut-off events. For 285084/285084 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23117 event pairs, 574 based on Foata normal form. 2/3976 useless extension candidates. Maximal degree in co-relation 25794. Up to 3585 conditions per place. [2024-06-27 21:37:56,484 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 241 selfloop transitions, 53 changer transitions 0/299 dead transitions. [2024-06-27 21:37:56,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 299 transitions, 3520 flow [2024-06-27 21:37:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:37:56,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 21:37:56,486 INFO L175 Difference]: Start difference. First operand has 239 places, 275 transitions, 2846 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:37:56,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 299 transitions, 3520 flow [2024-06-27 21:37:56,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 299 transitions, 3415 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:56,975 INFO L231 Difference]: Finished difference. Result has 242 places, 278 transitions, 2908 flow [2024-06-27 21:37:56,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2741, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2908, PETRI_PLACES=242, PETRI_TRANSITIONS=278} [2024-06-27 21:37:56,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-27 21:37:56,976 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 278 transitions, 2908 flow [2024-06-27 21:37:56,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:56,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:56,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:37:56,984 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)] === [2024-06-27 21:37:56,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash 403611604, now seen corresponding path program 10 times [2024-06-27 21:37:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105488249] [2024-06-27 21:37:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:00,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:00,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105488249] [2024-06-27 21:38:00,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105488249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:00,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:00,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:00,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404110477] [2024-06-27 21:38:00,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:00,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:00,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:00,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:00,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:00,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:00,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 278 transitions, 2908 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:00,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:00,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:00,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:01,764 INFO L124 PetriNetUnfolderBase]: 2505/4012 cut-off events. [2024-06-27 21:38:01,765 INFO L125 PetriNetUnfolderBase]: For 317099/317099 co-relation queries the response was YES. [2024-06-27 21:38:01,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26245 conditions, 4012 events. 2505/4012 cut-off events. For 317099/317099 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 23377 event pairs, 677 based on Foata normal form. 12/4021 useless extension candidates. Maximal degree in co-relation 26133. Up to 3680 conditions per place. [2024-06-27 21:38:01,814 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 46 changer transitions 0/302 dead transitions. [2024-06-27 21:38:01,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 302 transitions, 3622 flow [2024-06-27 21:38:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:38:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:38:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 21:38:01,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-27 21:38:01,816 INFO L175 Difference]: Start difference. First operand has 242 places, 278 transitions, 2908 flow. Second operand 10 states and 158 transitions. [2024-06-27 21:38:01,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 302 transitions, 3622 flow [2024-06-27 21:38:02,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 302 transitions, 3497 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:02,197 INFO L231 Difference]: Finished difference. Result has 247 places, 279 transitions, 2907 flow [2024-06-27 21:38:02,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2907, PETRI_PLACES=247, PETRI_TRANSITIONS=279} [2024-06-27 21:38:02,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 21:38:02,198 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 279 transitions, 2907 flow [2024-06-27 21:38:02,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:02,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:02,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:02,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:38:02,198 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:02,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:02,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2011022910, now seen corresponding path program 11 times [2024-06-27 21:38:02,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:02,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054317630] [2024-06-27 21:38:02,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:02,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:05,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:05,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054317630] [2024-06-27 21:38:05,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054317630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:05,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:05,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:05,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280993542] [2024-06-27 21:38:05,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:05,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:05,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:05,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:05,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:05,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:05,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 279 transitions, 2907 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:05,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:05,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:05,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:07,051 INFO L124 PetriNetUnfolderBase]: 2500/4005 cut-off events. [2024-06-27 21:38:07,051 INFO L125 PetriNetUnfolderBase]: For 287864/287864 co-relation queries the response was YES. [2024-06-27 21:38:07,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26082 conditions, 4005 events. 2500/4005 cut-off events. For 287864/287864 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 23370 event pairs, 678 based on Foata normal form. 2/4004 useless extension candidates. Maximal degree in co-relation 25969. Up to 3715 conditions per place. [2024-06-27 21:38:07,097 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 44 changer transitions 0/295 dead transitions. [2024-06-27 21:38:07,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 295 transitions, 3523 flow [2024-06-27 21:38:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:38:07,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-27 21:38:07,099 INFO L175 Difference]: Start difference. First operand has 247 places, 279 transitions, 2907 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:38:07,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 295 transitions, 3523 flow [2024-06-27 21:38:07,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 295 transitions, 3405 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 21:38:07,672 INFO L231 Difference]: Finished difference. Result has 247 places, 279 transitions, 2882 flow [2024-06-27 21:38:07,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2882, PETRI_PLACES=247, PETRI_TRANSITIONS=279} [2024-06-27 21:38:07,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 21:38:07,673 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 279 transitions, 2882 flow [2024-06-27 21:38:07,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:07,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:07,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:07,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:38:07,673 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:07,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:07,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2019363150, now seen corresponding path program 12 times [2024-06-27 21:38:07,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:07,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799628079] [2024-06-27 21:38:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:07,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:10,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:10,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799628079] [2024-06-27 21:38:10,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799628079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:10,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:10,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:10,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248919758] [2024-06-27 21:38:10,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:10,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:10,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:10,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:10,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 279 transitions, 2882 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:10,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:10,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:10,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:12,152 INFO L124 PetriNetUnfolderBase]: 2495/3998 cut-off events. [2024-06-27 21:38:12,152 INFO L125 PetriNetUnfolderBase]: For 287506/287506 co-relation queries the response was YES. [2024-06-27 21:38:12,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25873 conditions, 3998 events. 2495/3998 cut-off events. For 287506/287506 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 23233 event pairs, 671 based on Foata normal form. 2/3997 useless extension candidates. Maximal degree in co-relation 25759. Up to 3598 conditions per place. [2024-06-27 21:38:12,196 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 53 changer transitions 0/299 dead transitions. [2024-06-27 21:38:12,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 299 transitions, 3562 flow [2024-06-27 21:38:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:38:12,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 21:38:12,198 INFO L175 Difference]: Start difference. First operand has 247 places, 279 transitions, 2882 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:38:12,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 299 transitions, 3562 flow [2024-06-27 21:38:12,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 299 transitions, 3445 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:12,857 INFO L231 Difference]: Finished difference. Result has 248 places, 279 transitions, 2876 flow [2024-06-27 21:38:12,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2765, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2876, PETRI_PLACES=248, PETRI_TRANSITIONS=279} [2024-06-27 21:38:12,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-27 21:38:12,858 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 279 transitions, 2876 flow [2024-06-27 21:38:12,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:12,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:12,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:12,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:38:12,858 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:12,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:12,859 INFO L85 PathProgramCache]: Analyzing trace with hash 717589169, now seen corresponding path program 1 times [2024-06-27 21:38:12,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:12,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739398261] [2024-06-27 21:38:12,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:12,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:15,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:15,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739398261] [2024-06-27 21:38:15,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739398261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:15,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:15,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:15,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305439712] [2024-06-27 21:38:15,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:15,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:15,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:15,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:15,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:15,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 279 transitions, 2876 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:15,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:15,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:15,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:17,395 INFO L124 PetriNetUnfolderBase]: 2707/4322 cut-off events. [2024-06-27 21:38:17,395 INFO L125 PetriNetUnfolderBase]: For 323564/323564 co-relation queries the response was YES. [2024-06-27 21:38:17,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28154 conditions, 4322 events. 2707/4322 cut-off events. For 323564/323564 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25181 event pairs, 623 based on Foata normal form. 4/4325 useless extension candidates. Maximal degree in co-relation 28039. Up to 3786 conditions per place. [2024-06-27 21:38:17,439 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 303 selfloop transitions, 91 changer transitions 0/399 dead transitions. [2024-06-27 21:38:17,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 399 transitions, 4725 flow [2024-06-27 21:38:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:38:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:38:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 227 transitions. [2024-06-27 21:38:17,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503968253968254 [2024-06-27 21:38:17,441 INFO L175 Difference]: Start difference. First operand has 248 places, 279 transitions, 2876 flow. Second operand 12 states and 227 transitions. [2024-06-27 21:38:17,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 399 transitions, 4725 flow [2024-06-27 21:38:18,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 399 transitions, 4586 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:18,019 INFO L231 Difference]: Finished difference. Result has 257 places, 330 transitions, 3574 flow [2024-06-27 21:38:18,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3574, PETRI_PLACES=257, PETRI_TRANSITIONS=330} [2024-06-27 21:38:18,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-27 21:38:18,020 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 330 transitions, 3574 flow [2024-06-27 21:38:18,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:18,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:18,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:18,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:38:18,024 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:18,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:18,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1906129265, now seen corresponding path program 2 times [2024-06-27 21:38:18,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:18,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979451326] [2024-06-27 21:38:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:18,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:21,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:21,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979451326] [2024-06-27 21:38:21,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979451326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:21,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:21,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:21,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024697688] [2024-06-27 21:38:21,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:21,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:21,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:21,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:21,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:21,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:21,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 330 transitions, 3574 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:21,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:21,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:21,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:23,018 INFO L124 PetriNetUnfolderBase]: 2699/4312 cut-off events. [2024-06-27 21:38:23,018 INFO L125 PetriNetUnfolderBase]: For 328703/328703 co-relation queries the response was YES. [2024-06-27 21:38:23,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28951 conditions, 4312 events. 2699/4312 cut-off events. For 328703/328703 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 25146 event pairs, 630 based on Foata normal form. 8/4319 useless extension candidates. Maximal degree in co-relation 28832. Up to 3706 conditions per place. [2024-06-27 21:38:23,063 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 257 selfloop transitions, 115 changer transitions 0/377 dead transitions. [2024-06-27 21:38:23,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 377 transitions, 4686 flow [2024-06-27 21:38:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:38:23,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:38:23,065 INFO L175 Difference]: Start difference. First operand has 257 places, 330 transitions, 3574 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:38:23,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 377 transitions, 4686 flow [2024-06-27 21:38:23,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 377 transitions, 4411 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:23,649 INFO L231 Difference]: Finished difference. Result has 261 places, 333 transitions, 3622 flow [2024-06-27 21:38:23,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3622, PETRI_PLACES=261, PETRI_TRANSITIONS=333} [2024-06-27 21:38:23,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-27 21:38:23,650 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 333 transitions, 3622 flow [2024-06-27 21:38:23,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:23,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:23,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:23,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:38:23,650 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:23,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:23,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1446509589, now seen corresponding path program 1 times [2024-06-27 21:38:23,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:23,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700815304] [2024-06-27 21:38:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:23,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:26,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:26,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700815304] [2024-06-27 21:38:26,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700815304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:26,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:26,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:26,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612361289] [2024-06-27 21:38:26,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:26,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:26,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:26,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:26,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:26,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 333 transitions, 3622 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:26,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:26,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:26,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:28,792 INFO L124 PetriNetUnfolderBase]: 2787/4462 cut-off events. [2024-06-27 21:38:28,792 INFO L125 PetriNetUnfolderBase]: For 339469/339469 co-relation queries the response was YES. [2024-06-27 21:38:28,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30128 conditions, 4462 events. 2787/4462 cut-off events. For 339469/339469 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26167 event pairs, 602 based on Foata normal form. 8/4469 useless extension candidates. Maximal degree in co-relation 30009. Up to 3816 conditions per place. [2024-06-27 21:38:28,838 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 320 selfloop transitions, 59 changer transitions 0/384 dead transitions. [2024-06-27 21:38:28,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 384 transitions, 4792 flow [2024-06-27 21:38:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:38:28,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:38:28,841 INFO L175 Difference]: Start difference. First operand has 261 places, 333 transitions, 3622 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:38:28,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 384 transitions, 4792 flow [2024-06-27 21:38:29,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 384 transitions, 4503 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:29,358 INFO L231 Difference]: Finished difference. Result has 264 places, 337 transitions, 3548 flow [2024-06-27 21:38:29,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3548, PETRI_PLACES=264, PETRI_TRANSITIONS=337} [2024-06-27 21:38:29,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-27 21:38:29,359 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 337 transitions, 3548 flow [2024-06-27 21:38:29,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:29,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:29,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:29,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:38:29,360 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)] === [2024-06-27 21:38:29,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:29,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1682684949, now seen corresponding path program 2 times [2024-06-27 21:38:29,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:29,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465039560] [2024-06-27 21:38:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:29,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:32,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:32,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465039560] [2024-06-27 21:38:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465039560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:32,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:32,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36302826] [2024-06-27 21:38:32,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:32,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:32,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:32,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:32,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:32,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:32,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 337 transitions, 3548 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:32,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:32,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:32,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:34,611 INFO L124 PetriNetUnfolderBase]: 2861/4580 cut-off events. [2024-06-27 21:38:34,611 INFO L125 PetriNetUnfolderBase]: For 341381/341381 co-relation queries the response was YES. [2024-06-27 21:38:34,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30742 conditions, 4580 events. 2861/4580 cut-off events. For 341381/341381 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27056 event pairs, 697 based on Foata normal form. 8/4587 useless extension candidates. Maximal degree in co-relation 30622. Up to 4134 conditions per place. [2024-06-27 21:38:34,661 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 324 selfloop transitions, 55 changer transitions 0/384 dead transitions. [2024-06-27 21:38:34,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 384 transitions, 4563 flow [2024-06-27 21:38:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:38:34,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:38:34,663 INFO L175 Difference]: Start difference. First operand has 264 places, 337 transitions, 3548 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:38:34,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 384 transitions, 4563 flow [2024-06-27 21:38:35,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 384 transitions, 4444 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:35,270 INFO L231 Difference]: Finished difference. Result has 268 places, 342 transitions, 3643 flow [2024-06-27 21:38:35,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3435, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3643, PETRI_PLACES=268, PETRI_TRANSITIONS=342} [2024-06-27 21:38:35,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-27 21:38:35,270 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 342 transitions, 3643 flow [2024-06-27 21:38:35,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:35,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:35,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:35,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:38:35,271 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)] === [2024-06-27 21:38:35,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:35,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1480482993, now seen corresponding path program 3 times [2024-06-27 21:38:35,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:35,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120207623] [2024-06-27 21:38:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:35,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:38,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:38,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120207623] [2024-06-27 21:38:38,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120207623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:38,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:38,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:38,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854419469] [2024-06-27 21:38:38,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:38,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:38,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:38,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:38,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:38,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 342 transitions, 3643 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:38,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:38,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:38,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:40,834 INFO L124 PetriNetUnfolderBase]: 2913/4664 cut-off events. [2024-06-27 21:38:40,835 INFO L125 PetriNetUnfolderBase]: For 350153/350155 co-relation queries the response was YES. [2024-06-27 21:38:40,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31678 conditions, 4664 events. 2913/4664 cut-off events. For 350153/350155 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 27591 event pairs, 586 based on Foata normal form. 6/4669 useless extension candidates. Maximal degree in co-relation 31556. Up to 3342 conditions per place. [2024-06-27 21:38:40,883 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 196 selfloop transitions, 194 changer transitions 0/395 dead transitions. [2024-06-27 21:38:40,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 395 transitions, 5287 flow [2024-06-27 21:38:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:38:40,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 21:38:40,884 INFO L175 Difference]: Start difference. First operand has 268 places, 342 transitions, 3643 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:38:40,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 395 transitions, 5287 flow [2024-06-27 21:38:41,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 395 transitions, 5202 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:41,653 INFO L231 Difference]: Finished difference. Result has 273 places, 351 transitions, 4192 flow [2024-06-27 21:38:41,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3558, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4192, PETRI_PLACES=273, PETRI_TRANSITIONS=351} [2024-06-27 21:38:41,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 21:38:41,654 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 351 transitions, 4192 flow [2024-06-27 21:38:41,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:41,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:41,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:41,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:38:41,654 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)] === [2024-06-27 21:38:41,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:41,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1949647827, now seen corresponding path program 4 times [2024-06-27 21:38:41,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:41,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630104445] [2024-06-27 21:38:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:41,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:44,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:44,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630104445] [2024-06-27 21:38:44,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630104445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:44,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:44,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:44,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151693647] [2024-06-27 21:38:44,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:44,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:44,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:44,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:44,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:44,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:44,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 351 transitions, 4192 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:44,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:44,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:44,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:46,897 INFO L124 PetriNetUnfolderBase]: 2965/4732 cut-off events. [2024-06-27 21:38:46,897 INFO L125 PetriNetUnfolderBase]: For 379316/379318 co-relation queries the response was YES. [2024-06-27 21:38:46,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33625 conditions, 4732 events. 2965/4732 cut-off events. For 379316/379318 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27986 event pairs, 576 based on Foata normal form. 6/4737 useless extension candidates. Maximal degree in co-relation 33502. Up to 3382 conditions per place. [2024-06-27 21:38:46,954 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 196 selfloop transitions, 198 changer transitions 0/399 dead transitions. [2024-06-27 21:38:46,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 399 transitions, 5780 flow [2024-06-27 21:38:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:38:46,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 21:38:46,957 INFO L175 Difference]: Start difference. First operand has 273 places, 351 transitions, 4192 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:38:46,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 399 transitions, 5780 flow [2024-06-27 21:38:47,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 399 transitions, 5341 flow, removed 112 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:47,810 INFO L231 Difference]: Finished difference. Result has 277 places, 357 transitions, 4323 flow [2024-06-27 21:38:47,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3833, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4323, PETRI_PLACES=277, PETRI_TRANSITIONS=357} [2024-06-27 21:38:47,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-27 21:38:47,811 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 357 transitions, 4323 flow [2024-06-27 21:38:47,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:47,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:47,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:47,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:38:47,811 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)] === [2024-06-27 21:38:47,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:47,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1949291637, now seen corresponding path program 5 times [2024-06-27 21:38:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:47,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161486155] [2024-06-27 21:38:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:47,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:51,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:51,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161486155] [2024-06-27 21:38:51,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161486155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:51,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:51,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:51,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100676708] [2024-06-27 21:38:51,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:51,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:51,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:51,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:51,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:51,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:51,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 357 transitions, 4323 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:51,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:51,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:51,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:53,178 INFO L124 PetriNetUnfolderBase]: 2953/4720 cut-off events. [2024-06-27 21:38:53,178 INFO L125 PetriNetUnfolderBase]: For 358017/358019 co-relation queries the response was YES. [2024-06-27 21:38:53,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32094 conditions, 4720 events. 2953/4720 cut-off events. For 358017/358019 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27974 event pairs, 578 based on Foata normal form. 6/4725 useless extension candidates. Maximal degree in co-relation 31970. Up to 3374 conditions per place. [2024-06-27 21:38:53,233 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 195 changer transitions 0/398 dead transitions. [2024-06-27 21:38:53,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 398 transitions, 5572 flow [2024-06-27 21:38:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:38:53,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 21:38:53,235 INFO L175 Difference]: Start difference. First operand has 277 places, 357 transitions, 4323 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:38:53,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 398 transitions, 5572 flow [2024-06-27 21:38:54,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 398 transitions, 5310 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:54,382 INFO L231 Difference]: Finished difference. Result has 282 places, 357 transitions, 4457 flow [2024-06-27 21:38:54,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4457, PETRI_PLACES=282, PETRI_TRANSITIONS=357} [2024-06-27 21:38:54,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 21:38:54,383 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 357 transitions, 4457 flow [2024-06-27 21:38:54,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:54,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:54,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:54,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:38:54,384 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)] === [2024-06-27 21:38:54,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:54,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1585242957, now seen corresponding path program 6 times [2024-06-27 21:38:54,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:54,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450311316] [2024-06-27 21:38:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:54,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:57,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:57,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450311316] [2024-06-27 21:38:57,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450311316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:57,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:57,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:57,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373636596] [2024-06-27 21:38:57,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:57,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:57,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:57,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:57,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:57,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:57,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 357 transitions, 4457 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:57,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:57,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:57,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:59,202 INFO L124 PetriNetUnfolderBase]: 3037/4852 cut-off events. [2024-06-27 21:38:59,202 INFO L125 PetriNetUnfolderBase]: For 399375/399375 co-relation queries the response was YES. [2024-06-27 21:38:59,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33615 conditions, 4852 events. 3037/4852 cut-off events. For 399375/399375 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 28921 event pairs, 705 based on Foata normal form. 4/4855 useless extension candidates. Maximal degree in co-relation 33490. Up to 4266 conditions per place. [2024-06-27 21:38:59,252 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 88 changer transitions 0/402 dead transitions. [2024-06-27 21:38:59,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 402 transitions, 5869 flow [2024-06-27 21:38:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:38:59,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 21:38:59,253 INFO L175 Difference]: Start difference. First operand has 282 places, 357 transitions, 4457 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:38:59,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 402 transitions, 5869 flow [2024-06-27 21:39:00,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 402 transitions, 5434 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:39:00,285 INFO L231 Difference]: Finished difference. Result has 283 places, 366 transitions, 4369 flow [2024-06-27 21:39:00,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4369, PETRI_PLACES=283, PETRI_TRANSITIONS=366} [2024-06-27 21:39:00,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 21:39:00,286 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 366 transitions, 4369 flow [2024-06-27 21:39:00,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:00,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:00,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:00,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:39:00,286 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)] === [2024-06-27 21:39:00,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:00,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2027112847, now seen corresponding path program 7 times [2024-06-27 21:39:00,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:00,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644574150] [2024-06-27 21:39:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:00,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:03,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:03,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644574150] [2024-06-27 21:39:03,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644574150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:03,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:03,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:03,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445560583] [2024-06-27 21:39:03,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:03,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:03,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:03,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:03,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:03,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 366 transitions, 4369 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:03,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:03,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:03,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:04,908 INFO L124 PetriNetUnfolderBase]: 3025/4836 cut-off events. [2024-06-27 21:39:04,908 INFO L125 PetriNetUnfolderBase]: For 390569/390569 co-relation queries the response was YES. [2024-06-27 21:39:04,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32746 conditions, 4836 events. 3025/4836 cut-off events. For 390569/390569 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 28846 event pairs, 703 based on Foata normal form. 4/4839 useless extension candidates. Maximal degree in co-relation 32620. Up to 4258 conditions per place. [2024-06-27 21:39:04,971 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 91 changer transitions 0/405 dead transitions. [2024-06-27 21:39:04,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 405 transitions, 5469 flow [2024-06-27 21:39:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:39:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:39:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 21:39:04,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-27 21:39:04,973 INFO L175 Difference]: Start difference. First operand has 283 places, 366 transitions, 4369 flow. Second operand 11 states and 184 transitions. [2024-06-27 21:39:04,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 405 transitions, 5469 flow [2024-06-27 21:39:06,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 405 transitions, 5352 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 21:39:06,021 INFO L231 Difference]: Finished difference. Result has 290 places, 366 transitions, 4440 flow [2024-06-27 21:39:06,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4252, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4440, PETRI_PLACES=290, PETRI_TRANSITIONS=366} [2024-06-27 21:39:06,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-27 21:39:06,022 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 366 transitions, 4440 flow [2024-06-27 21:39:06,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:06,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:06,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:06,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:39:06,023 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)] === [2024-06-27 21:39:06,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:06,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1855809167, now seen corresponding path program 8 times [2024-06-27 21:39:06,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:06,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206572019] [2024-06-27 21:39:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:06,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:09,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:09,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206572019] [2024-06-27 21:39:09,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206572019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:09,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:09,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:09,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702719283] [2024-06-27 21:39:09,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:09,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:09,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:09,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:09,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 366 transitions, 4440 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:09,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:09,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:09,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:11,315 INFO L124 PetriNetUnfolderBase]: 3013/4818 cut-off events. [2024-06-27 21:39:11,316 INFO L125 PetriNetUnfolderBase]: For 382613/382613 co-relation queries the response was YES. [2024-06-27 21:39:11,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32538 conditions, 4818 events. 3013/4818 cut-off events. For 382613/382613 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 28721 event pairs, 705 based on Foata normal form. 4/4821 useless extension candidates. Maximal degree in co-relation 32410. Up to 4250 conditions per place. [2024-06-27 21:39:11,375 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 306 selfloop transitions, 88 changer transitions 0/399 dead transitions. [2024-06-27 21:39:11,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 399 transitions, 5334 flow [2024-06-27 21:39:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:39:11,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 21:39:11,376 INFO L175 Difference]: Start difference. First operand has 290 places, 366 transitions, 4440 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:39:11,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 399 transitions, 5334 flow [2024-06-27 21:39:12,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 399 transitions, 5092 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 21:39:12,454 INFO L231 Difference]: Finished difference. Result has 289 places, 366 transitions, 4380 flow [2024-06-27 21:39:12,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4198, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4380, PETRI_PLACES=289, PETRI_TRANSITIONS=366} [2024-06-27 21:39:12,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 21:39:12,455 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 366 transitions, 4380 flow [2024-06-27 21:39:12,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:12,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:12,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:12,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:39:12,455 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)] === [2024-06-27 21:39:12,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:12,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2003511023, now seen corresponding path program 3 times [2024-06-27 21:39:12,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:12,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917582735] [2024-06-27 21:39:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:12,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:15,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:15,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917582735] [2024-06-27 21:39:15,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917582735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:15,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:15,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:15,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002951907] [2024-06-27 21:39:15,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:15,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:15,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:15,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:15,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:15,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:15,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 366 transitions, 4380 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:15,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:15,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:15,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:17,298 INFO L124 PetriNetUnfolderBase]: 3041/4862 cut-off events. [2024-06-27 21:39:17,299 INFO L125 PetriNetUnfolderBase]: For 407081/407081 co-relation queries the response was YES. [2024-06-27 21:39:17,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32861 conditions, 4862 events. 3041/4862 cut-off events. For 407081/407081 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 29014 event pairs, 723 based on Foata normal form. 8/4869 useless extension candidates. Maximal degree in co-relation 32732. Up to 4398 conditions per place. [2024-06-27 21:39:17,360 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 345 selfloop transitions, 53 changer transitions 0/403 dead transitions. [2024-06-27 21:39:17,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 403 transitions, 5355 flow [2024-06-27 21:39:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:39:17,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 21:39:17,362 INFO L175 Difference]: Start difference. First operand has 289 places, 366 transitions, 4380 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:39:17,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 403 transitions, 5355 flow [2024-06-27 21:39:18,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 403 transitions, 5166 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:39:18,523 INFO L231 Difference]: Finished difference. Result has 291 places, 368 transitions, 4365 flow [2024-06-27 21:39:18,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4191, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4365, PETRI_PLACES=291, PETRI_TRANSITIONS=368} [2024-06-27 21:39:18,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-27 21:39:18,524 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 368 transitions, 4365 flow [2024-06-27 21:39:18,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:18,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:18,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:18,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:39:18,524 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)] === [2024-06-27 21:39:18,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:18,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2063064495, now seen corresponding path program 1 times [2024-06-27 21:39:18,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:18,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923908893] [2024-06-27 21:39:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:18,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:21,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:21,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923908893] [2024-06-27 21:39:21,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923908893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:21,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:21,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:21,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680302692] [2024-06-27 21:39:21,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:21,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:21,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:21,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:21,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 368 transitions, 4365 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:21,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:21,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:21,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:23,532 INFO L124 PetriNetUnfolderBase]: 3141/5008 cut-off events. [2024-06-27 21:39:23,532 INFO L125 PetriNetUnfolderBase]: For 464697/464699 co-relation queries the response was YES. [2024-06-27 21:39:23,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34839 conditions, 5008 events. 3141/5008 cut-off events. For 464697/464699 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 29916 event pairs, 642 based on Foata normal form. 10/5017 useless extension candidates. Maximal degree in co-relation 34708. Up to 4114 conditions per place. [2024-06-27 21:39:23,590 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 97 changer transitions 0/418 dead transitions. [2024-06-27 21:39:23,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 418 transitions, 5593 flow [2024-06-27 21:39:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:39:23,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 21:39:23,592 INFO L175 Difference]: Start difference. First operand has 291 places, 368 transitions, 4365 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:39:23,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 418 transitions, 5593 flow [2024-06-27 21:39:24,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 418 transitions, 5482 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:24,802 INFO L231 Difference]: Finished difference. Result has 295 places, 370 transitions, 4490 flow [2024-06-27 21:39:24,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4490, PETRI_PLACES=295, PETRI_TRANSITIONS=370} [2024-06-27 21:39:24,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-27 21:39:24,802 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 370 transitions, 4490 flow [2024-06-27 21:39:24,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:24,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:24,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:24,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:39:24,803 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)] === [2024-06-27 21:39:24,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:24,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1970150945, now seen corresponding path program 2 times [2024-06-27 21:39:24,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:24,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012032996] [2024-06-27 21:39:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:24,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:28,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:28,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012032996] [2024-06-27 21:39:28,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012032996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:28,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:28,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:28,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625956168] [2024-06-27 21:39:28,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:28,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:28,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:28,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:28,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:28,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:28,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 370 transitions, 4490 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:28,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:28,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:28,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:30,153 INFO L124 PetriNetUnfolderBase]: 3185/5086 cut-off events. [2024-06-27 21:39:30,153 INFO L125 PetriNetUnfolderBase]: For 491418/491420 co-relation queries the response was YES. [2024-06-27 21:39:30,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35531 conditions, 5086 events. 3185/5086 cut-off events. For 491418/491420 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 30518 event pairs, 658 based on Foata normal form. 14/5099 useless extension candidates. Maximal degree in co-relation 35400. Up to 4342 conditions per place. [2024-06-27 21:39:30,208 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 91 changer transitions 0/412 dead transitions. [2024-06-27 21:39:30,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 412 transitions, 5482 flow [2024-06-27 21:39:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:39:30,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:39:30,210 INFO L175 Difference]: Start difference. First operand has 295 places, 370 transitions, 4490 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:39:30,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 412 transitions, 5482 flow [2024-06-27 21:39:31,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 412 transitions, 5361 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:31,670 INFO L231 Difference]: Finished difference. Result has 299 places, 371 transitions, 4578 flow [2024-06-27 21:39:31,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4369, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4578, PETRI_PLACES=299, PETRI_TRANSITIONS=371} [2024-06-27 21:39:31,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-27 21:39:31,671 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 371 transitions, 4578 flow [2024-06-27 21:39:31,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:31,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:31,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:31,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:39:31,672 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)] === [2024-06-27 21:39:31,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1978073655, now seen corresponding path program 3 times [2024-06-27 21:39:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:31,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748893547] [2024-06-27 21:39:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:31,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:35,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:35,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748893547] [2024-06-27 21:39:35,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748893547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:35,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:35,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:35,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269854104] [2024-06-27 21:39:35,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:35,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:35,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:35,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:35,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:35,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 371 transitions, 4578 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:35,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:35,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:35,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:37,116 INFO L124 PetriNetUnfolderBase]: 3213/5126 cut-off events. [2024-06-27 21:39:37,116 INFO L125 PetriNetUnfolderBase]: For 485098/485100 co-relation queries the response was YES. [2024-06-27 21:39:37,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36207 conditions, 5126 events. 3213/5126 cut-off events. For 485098/485100 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 30766 event pairs, 656 based on Foata normal form. 10/5135 useless extension candidates. Maximal degree in co-relation 36074. Up to 4348 conditions per place. [2024-06-27 21:39:37,188 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 93 changer transitions 0/416 dead transitions. [2024-06-27 21:39:37,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 416 transitions, 5596 flow [2024-06-27 21:39:37,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:39:37,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 21:39:37,190 INFO L175 Difference]: Start difference. First operand has 299 places, 371 transitions, 4578 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:39:37,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 416 transitions, 5596 flow [2024-06-27 21:39:38,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 416 transitions, 5407 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:39:38,420 INFO L231 Difference]: Finished difference. Result has 301 places, 372 transitions, 4603 flow [2024-06-27 21:39:38,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4389, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4603, PETRI_PLACES=301, PETRI_TRANSITIONS=372} [2024-06-27 21:39:38,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-27 21:39:38,421 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 372 transitions, 4603 flow [2024-06-27 21:39:38,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:38,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:38,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:38,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:39:38,422 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)] === [2024-06-27 21:39:38,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1656144243, now seen corresponding path program 4 times [2024-06-27 21:39:38,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:38,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065872679] [2024-06-27 21:39:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:38,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:41,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:41,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065872679] [2024-06-27 21:39:41,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065872679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:41,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:41,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:39:41,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158780879] [2024-06-27 21:39:41,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:41,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:39:41,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:41,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:39:41,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:39:41,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:41,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 372 transitions, 4603 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:41,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:41,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:41,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:43,830 INFO L124 PetriNetUnfolderBase]: 3397/5414 cut-off events. [2024-06-27 21:39:43,831 INFO L125 PetriNetUnfolderBase]: For 704064/704064 co-relation queries the response was YES. [2024-06-27 21:39:43,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37858 conditions, 5414 events. 3397/5414 cut-off events. For 704064/704064 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 32655 event pairs, 805 based on Foata normal form. 56/5469 useless extension candidates. Maximal degree in co-relation 37724. Up to 4606 conditions per place. [2024-06-27 21:39:43,907 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 71 changer transitions 14/416 dead transitions. [2024-06-27 21:39:43,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 416 transitions, 5632 flow [2024-06-27 21:39:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:39:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:39:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 21:39:43,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:39:43,909 INFO L175 Difference]: Start difference. First operand has 301 places, 372 transitions, 4603 flow. Second operand 11 states and 187 transitions. [2024-06-27 21:39:43,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 416 transitions, 5632 flow [2024-06-27 21:39:45,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 416 transitions, 5432 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:39:45,268 INFO L231 Difference]: Finished difference. Result has 305 places, 362 transitions, 4431 flow [2024-06-27 21:39:45,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4403, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4431, PETRI_PLACES=305, PETRI_TRANSITIONS=362} [2024-06-27 21:39:45,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-27 21:39:45,269 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 362 transitions, 4431 flow [2024-06-27 21:39:45,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:45,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:45,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:45,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:39:45,270 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)] === [2024-06-27 21:39:45,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:45,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1648519731, now seen corresponding path program 1 times [2024-06-27 21:39:45,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:45,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117589723] [2024-06-27 21:39:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:45,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:48,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:48,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117589723] [2024-06-27 21:39:48,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117589723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:48,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:48,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:39:48,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017890836] [2024-06-27 21:39:48,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:48,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:39:48,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:39:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:39:48,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:48,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 362 transitions, 4431 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:48,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:48,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:48,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:51,325 INFO L124 PetriNetUnfolderBase]: 3661/5834 cut-off events. [2024-06-27 21:39:51,325 INFO L125 PetriNetUnfolderBase]: For 931321/931321 co-relation queries the response was YES. [2024-06-27 21:39:51,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45163 conditions, 5834 events. 3661/5834 cut-off events. For 931321/931321 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 35292 event pairs, 881 based on Foata normal form. 48/5881 useless extension candidates. Maximal degree in co-relation 45028. Up to 4478 conditions per place. [2024-06-27 21:39:51,399 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 67 changer transitions 15/415 dead transitions. [2024-06-27 21:39:51,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 415 transitions, 5771 flow [2024-06-27 21:39:51,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:39:51,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:39:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-27 21:39:51,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-27 21:39:51,401 INFO L175 Difference]: Start difference. First operand has 305 places, 362 transitions, 4431 flow. Second operand 11 states and 192 transitions. [2024-06-27 21:39:51,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 415 transitions, 5771 flow [2024-06-27 21:39:54,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 415 transitions, 5618 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 21:39:54,124 INFO L231 Difference]: Finished difference. Result has 308 places, 355 transitions, 4335 flow [2024-06-27 21:39:54,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4335, PETRI_PLACES=308, PETRI_TRANSITIONS=355} [2024-06-27 21:39:54,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-27 21:39:54,124 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 355 transitions, 4335 flow [2024-06-27 21:39:54,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:54,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:54,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:54,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:39:54,125 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)] === [2024-06-27 21:39:54,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:54,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1855590183, now seen corresponding path program 5 times [2024-06-27 21:39:54,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:54,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530232931] [2024-06-27 21:39:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:54,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:57,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:57,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530232931] [2024-06-27 21:39:57,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530232931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:57,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:57,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:39:57,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871346089] [2024-06-27 21:39:57,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:57,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:39:57,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:57,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:39:57,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:39:57,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:57,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 355 transitions, 4335 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:57,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:57,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:57,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:59,812 INFO L124 PetriNetUnfolderBase]: 3317/5302 cut-off events. [2024-06-27 21:39:59,812 INFO L125 PetriNetUnfolderBase]: For 736001/736001 co-relation queries the response was YES. [2024-06-27 21:39:59,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37279 conditions, 5302 events. 3317/5302 cut-off events. For 736001/736001 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 31914 event pairs, 815 based on Foata normal form. 56/5357 useless extension candidates. Maximal degree in co-relation 37142. Up to 4556 conditions per place. [2024-06-27 21:39:59,873 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 53 changer transitions 12/394 dead transitions. [2024-06-27 21:39:59,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 394 transitions, 5283 flow [2024-06-27 21:39:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:39:59,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:39:59,874 INFO L175 Difference]: Start difference. First operand has 308 places, 355 transitions, 4335 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:39:59,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 394 transitions, 5283 flow [2024-06-27 21:40:01,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 394 transitions, 5138 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-06-27 21:40:01,667 INFO L231 Difference]: Finished difference. Result has 305 places, 346 transitions, 4183 flow [2024-06-27 21:40:01,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4183, PETRI_PLACES=305, PETRI_TRANSITIONS=346} [2024-06-27 21:40:01,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-27 21:40:01,668 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 346 transitions, 4183 flow [2024-06-27 21:40:01,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:01,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:01,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:01,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:40:01,668 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)] === [2024-06-27 21:40:01,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1855593903, now seen corresponding path program 6 times [2024-06-27 21:40:01,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:01,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421439515] [2024-06-27 21:40:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:05,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:05,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421439515] [2024-06-27 21:40:05,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421439515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:05,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:05,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:40:05,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848056503] [2024-06-27 21:40:05,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:05,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:40:05,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:05,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:40:05,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:40:05,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:05,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 346 transitions, 4183 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:05,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:05,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:05,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:07,332 INFO L124 PetriNetUnfolderBase]: 3281/5258 cut-off events. [2024-06-27 21:40:07,333 INFO L125 PetriNetUnfolderBase]: For 709105/709105 co-relation queries the response was YES. [2024-06-27 21:40:07,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36971 conditions, 5258 events. 3281/5258 cut-off events. For 709105/709105 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 31620 event pairs, 765 based on Foata normal form. 48/5305 useless extension candidates. Maximal degree in co-relation 36832. Up to 4442 conditions per place. [2024-06-27 21:40:07,391 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 48 changer transitions 16/391 dead transitions. [2024-06-27 21:40:07,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 391 transitions, 5220 flow [2024-06-27 21:40:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:40:07,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 21:40:07,393 INFO L175 Difference]: Start difference. First operand has 305 places, 346 transitions, 4183 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:40:07,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 391 transitions, 5220 flow [2024-06-27 21:40:08,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 391 transitions, 5111 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:08,839 INFO L231 Difference]: Finished difference. Result has 307 places, 338 transitions, 4031 flow [2024-06-27 21:40:08,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4074, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4031, PETRI_PLACES=307, PETRI_TRANSITIONS=338} [2024-06-27 21:40:08,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-27 21:40:08,840 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 338 transitions, 4031 flow [2024-06-27 21:40:08,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:08,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:08,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:08,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:40:08,841 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)] === [2024-06-27 21:40:08,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash -721130379, now seen corresponding path program 9 times [2024-06-27 21:40:08,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:08,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919083685] [2024-06-27 21:40:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:08,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:11,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:11,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919083685] [2024-06-27 21:40:11,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919083685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:11,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:11,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:11,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393272677] [2024-06-27 21:40:11,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:11,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:11,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:11,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:11,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 338 transitions, 4031 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:11,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:11,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:11,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:14,056 INFO L124 PetriNetUnfolderBase]: 3123/5001 cut-off events. [2024-06-27 21:40:14,056 INFO L125 PetriNetUnfolderBase]: For 517485/517485 co-relation queries the response was YES. [2024-06-27 21:40:14,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35813 conditions, 5001 events. 3123/5001 cut-off events. For 517485/517485 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 29985 event pairs, 685 based on Foata normal form. 4/5001 useless extension candidates. Maximal degree in co-relation 35673. Up to 3708 conditions per place. [2024-06-27 21:40:14,127 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 179 changer transitions 0/379 dead transitions. [2024-06-27 21:40:14,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 379 transitions, 5354 flow [2024-06-27 21:40:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:40:14,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 21:40:14,128 INFO L175 Difference]: Start difference. First operand has 307 places, 338 transitions, 4031 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:40:14,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 379 transitions, 5354 flow [2024-06-27 21:40:15,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 379 transitions, 5230 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:15,604 INFO L231 Difference]: Finished difference. Result has 309 places, 341 transitions, 4344 flow [2024-06-27 21:40:15,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3907, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4344, PETRI_PLACES=309, PETRI_TRANSITIONS=341} [2024-06-27 21:40:15,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-27 21:40:15,605 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 341 transitions, 4344 flow [2024-06-27 21:40:15,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:15,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:15,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:15,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:40:15,606 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)] === [2024-06-27 21:40:15,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:15,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1304014107, now seen corresponding path program 10 times [2024-06-27 21:40:15,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:15,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813898117] [2024-06-27 21:40:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:18,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:18,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813898117] [2024-06-27 21:40:18,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813898117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:18,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:18,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:18,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144748695] [2024-06-27 21:40:18,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:18,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:18,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:18,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:18,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 341 transitions, 4344 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:18,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:18,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:18,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:20,804 INFO L124 PetriNetUnfolderBase]: 3175/5093 cut-off events. [2024-06-27 21:40:20,805 INFO L125 PetriNetUnfolderBase]: For 548509/548509 co-relation queries the response was YES. [2024-06-27 21:40:20,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37234 conditions, 5093 events. 3175/5093 cut-off events. For 548509/548509 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 30765 event pairs, 689 based on Foata normal form. 4/5093 useless extension candidates. Maximal degree in co-relation 37093. Up to 3748 conditions per place. [2024-06-27 21:40:20,871 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 200 selfloop transitions, 178 changer transitions 0/383 dead transitions. [2024-06-27 21:40:20,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 383 transitions, 5950 flow [2024-06-27 21:40:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:40:20,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 21:40:20,872 INFO L175 Difference]: Start difference. First operand has 309 places, 341 transitions, 4344 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:40:20,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 383 transitions, 5950 flow [2024-06-27 21:40:22,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 383 transitions, 5299 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-27 21:40:22,811 INFO L231 Difference]: Finished difference. Result has 309 places, 347 transitions, 4213 flow [2024-06-27 21:40:22,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3763, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4213, PETRI_PLACES=309, PETRI_TRANSITIONS=347} [2024-06-27 21:40:22,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-27 21:40:22,812 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 347 transitions, 4213 flow [2024-06-27 21:40:22,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:22,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:22,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:22,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:40:22,813 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)] === [2024-06-27 21:40:22,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:22,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1226671719, now seen corresponding path program 11 times [2024-06-27 21:40:22,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:22,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217794985] [2024-06-27 21:40:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:22,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:25,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:25,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217794985] [2024-06-27 21:40:25,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217794985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:25,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:25,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:25,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704327224] [2024-06-27 21:40:25,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:25,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:25,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:25,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:25,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:25,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 347 transitions, 4213 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:25,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:25,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:25,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:27,898 INFO L124 PetriNetUnfolderBase]: 3163/5077 cut-off events. [2024-06-27 21:40:27,899 INFO L125 PetriNetUnfolderBase]: For 533194/533194 co-relation queries the response was YES. [2024-06-27 21:40:27,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36194 conditions, 5077 events. 3163/5077 cut-off events. For 533194/533194 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 30691 event pairs, 683 based on Foata normal form. 4/5077 useless extension candidates. Maximal degree in co-relation 36053. Up to 3740 conditions per place. [2024-06-27 21:40:27,957 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 179 changer transitions 0/381 dead transitions. [2024-06-27 21:40:27,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 381 transitions, 5461 flow [2024-06-27 21:40:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:40:27,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:40:27,959 INFO L175 Difference]: Start difference. First operand has 309 places, 347 transitions, 4213 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:40:27,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 381 transitions, 5461 flow [2024-06-27 21:40:29,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 381 transitions, 5087 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:29,434 INFO L231 Difference]: Finished difference. Result has 313 places, 347 transitions, 4203 flow [2024-06-27 21:40:29,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3839, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4203, PETRI_PLACES=313, PETRI_TRANSITIONS=347} [2024-06-27 21:40:29,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-27 21:40:29,434 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 347 transitions, 4203 flow [2024-06-27 21:40:29,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:29,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:29,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:29,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:40:29,435 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)] === [2024-06-27 21:40:29,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:29,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1524433211, now seen corresponding path program 12 times [2024-06-27 21:40:29,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:29,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724688124] [2024-06-27 21:40:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:29,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:32,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:32,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724688124] [2024-06-27 21:40:32,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724688124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:32,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:32,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:32,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448855168] [2024-06-27 21:40:32,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:32,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:32,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:32,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:32,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:32,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:32,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 347 transitions, 4203 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:32,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:32,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:32,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:34,720 INFO L124 PetriNetUnfolderBase]: 3183/5120 cut-off events. [2024-06-27 21:40:34,721 INFO L125 PetriNetUnfolderBase]: For 543784/543784 co-relation queries the response was YES. [2024-06-27 21:40:34,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36400 conditions, 5120 events. 3183/5120 cut-off events. For 543784/543784 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 31036 event pairs, 742 based on Foata normal form. 4/5123 useless extension candidates. Maximal degree in co-relation 36258. Up to 4711 conditions per place. [2024-06-27 21:40:34,780 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 32 changer transitions 0/378 dead transitions. [2024-06-27 21:40:34,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 378 transitions, 5084 flow [2024-06-27 21:40:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:40:34,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 21:40:34,784 INFO L175 Difference]: Start difference. First operand has 313 places, 347 transitions, 4203 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:40:34,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 378 transitions, 5084 flow [2024-06-27 21:40:36,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 378 transitions, 4712 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:40:36,322 INFO L231 Difference]: Finished difference. Result has 314 places, 350 transitions, 3960 flow [2024-06-27 21:40:36,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3960, PETRI_PLACES=314, PETRI_TRANSITIONS=350} [2024-06-27 21:40:36,323 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-27 21:40:36,323 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 350 transitions, 3960 flow [2024-06-27 21:40:36,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:36,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:36,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:36,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:40:36,323 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)] === [2024-06-27 21:40:36,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash 718810067, now seen corresponding path program 13 times [2024-06-27 21:40:36,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:36,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672237298] [2024-06-27 21:40:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:39,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:39,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672237298] [2024-06-27 21:40:39,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672237298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:39,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:39,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745033641] [2024-06-27 21:40:39,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:39,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:39,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:39,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:39,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:39,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 350 transitions, 3960 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:39,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:39,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:39,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:41,231 INFO L124 PetriNetUnfolderBase]: 3235/5193 cut-off events. [2024-06-27 21:40:41,231 INFO L125 PetriNetUnfolderBase]: For 573196/573196 co-relation queries the response was YES. [2024-06-27 21:40:41,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36744 conditions, 5193 events. 3235/5193 cut-off events. For 573196/573196 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31507 event pairs, 675 based on Foata normal form. 4/5193 useless extension candidates. Maximal degree in co-relation 36601. Up to 3796 conditions per place. [2024-06-27 21:40:41,294 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 188 changer transitions 0/388 dead transitions. [2024-06-27 21:40:41,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 388 transitions, 5329 flow [2024-06-27 21:40:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:40:41,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:40:41,295 INFO L175 Difference]: Start difference. First operand has 314 places, 350 transitions, 3960 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:40:41,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 388 transitions, 5329 flow [2024-06-27 21:40:43,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 388 transitions, 5237 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:43,198 INFO L231 Difference]: Finished difference. Result has 316 places, 356 transitions, 4356 flow [2024-06-27 21:40:43,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3868, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4356, PETRI_PLACES=316, PETRI_TRANSITIONS=356} [2024-06-27 21:40:43,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-27 21:40:43,199 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 356 transitions, 4356 flow [2024-06-27 21:40:43,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:43,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:43,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:43,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:40:43,199 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)] === [2024-06-27 21:40:43,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:43,200 INFO L85 PathProgramCache]: Analyzing trace with hash 718453877, now seen corresponding path program 14 times [2024-06-27 21:40:43,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:43,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509757099] [2024-06-27 21:40:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:43,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:46,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:46,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509757099] [2024-06-27 21:40:46,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509757099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:46,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:46,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:46,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198782932] [2024-06-27 21:40:46,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:46,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:46,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:46,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:46,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:46,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:46,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 356 transitions, 4356 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:46,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:46,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:46,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:48,500 INFO L124 PetriNetUnfolderBase]: 3223/5177 cut-off events. [2024-06-27 21:40:48,501 INFO L125 PetriNetUnfolderBase]: For 565198/565198 co-relation queries the response was YES. [2024-06-27 21:40:48,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36943 conditions, 5177 events. 3223/5177 cut-off events. For 565198/565198 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31441 event pairs, 673 based on Foata normal form. 4/5177 useless extension candidates. Maximal degree in co-relation 36799. Up to 3788 conditions per place. [2024-06-27 21:40:48,555 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 193 selfloop transitions, 189 changer transitions 0/387 dead transitions. [2024-06-27 21:40:48,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 387 transitions, 5415 flow [2024-06-27 21:40:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:40:48,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 21:40:48,556 INFO L175 Difference]: Start difference. First operand has 316 places, 356 transitions, 4356 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:40:48,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 387 transitions, 5415 flow [2024-06-27 21:40:50,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 387 transitions, 5073 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:50,235 INFO L231 Difference]: Finished difference. Result has 320 places, 356 transitions, 4398 flow [2024-06-27 21:40:50,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4398, PETRI_PLACES=320, PETRI_TRANSITIONS=356} [2024-06-27 21:40:50,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 21:40:50,235 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 356 transitions, 4398 flow [2024-06-27 21:40:50,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:50,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:50,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:50,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:40:50,236 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)] === [2024-06-27 21:40:50,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:50,236 INFO L85 PathProgramCache]: Analyzing trace with hash -197181139, now seen corresponding path program 15 times [2024-06-27 21:40:50,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:50,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573212592] [2024-06-27 21:40:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:50,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:53,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:53,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573212592] [2024-06-27 21:40:53,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573212592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:53,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:53,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:53,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277364614] [2024-06-27 21:40:53,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:53,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:53,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:53,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:53,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 356 transitions, 4398 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:53,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:53,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:53,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:55,186 INFO L124 PetriNetUnfolderBase]: 3307/5316 cut-off events. [2024-06-27 21:40:55,186 INFO L125 PetriNetUnfolderBase]: For 622521/622521 co-relation queries the response was YES. [2024-06-27 21:40:55,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38577 conditions, 5316 events. 3307/5316 cut-off events. For 622521/622521 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 32509 event pairs, 871 based on Foata normal form. 4/5319 useless extension candidates. Maximal degree in co-relation 38432. Up to 4797 conditions per place. [2024-06-27 21:40:55,253 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 46 changer transitions 0/400 dead transitions. [2024-06-27 21:40:55,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 400 transitions, 5883 flow [2024-06-27 21:40:55,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:40:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:40:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 198 transitions. [2024-06-27 21:40:55,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3626373626373626 [2024-06-27 21:40:55,255 INFO L175 Difference]: Start difference. First operand has 320 places, 356 transitions, 4398 flow. Second operand 13 states and 198 transitions. [2024-06-27 21:40:55,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 400 transitions, 5883 flow [2024-06-27 21:40:57,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 400 transitions, 5483 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:40:57,451 INFO L231 Difference]: Finished difference. Result has 326 places, 365 transitions, 4306 flow [2024-06-27 21:40:57,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4016, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4306, PETRI_PLACES=326, PETRI_TRANSITIONS=365} [2024-06-27 21:40:57,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-27 21:40:57,452 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 365 transitions, 4306 flow [2024-06-27 21:40:57,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:57,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:57,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:57,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:40:57,452 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)] === [2024-06-27 21:40:57,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:57,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2066321489, now seen corresponding path program 16 times [2024-06-27 21:40:57,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:57,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726125413] [2024-06-27 21:40:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:57,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:00,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:00,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726125413] [2024-06-27 21:41:00,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726125413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:00,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:00,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:00,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306178454] [2024-06-27 21:41:00,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:00,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:00,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:00,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:00,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:00,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:00,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 365 transitions, 4306 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:00,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:00,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:00,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:02,652 INFO L124 PetriNetUnfolderBase]: 3295/5300 cut-off events. [2024-06-27 21:41:02,652 INFO L125 PetriNetUnfolderBase]: For 609873/609873 co-relation queries the response was YES. [2024-06-27 21:41:02,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37597 conditions, 5300 events. 3295/5300 cut-off events. For 609873/609873 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 32411 event pairs, 865 based on Foata normal form. 4/5303 useless extension candidates. Maximal degree in co-relation 37450. Up to 4789 conditions per place. [2024-06-27 21:41:02,709 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 46 changer transitions 0/394 dead transitions. [2024-06-27 21:41:02,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 394 transitions, 5581 flow [2024-06-27 21:41:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:41:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:41:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-27 21:41:02,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36796536796536794 [2024-06-27 21:41:02,711 INFO L175 Difference]: Start difference. First operand has 326 places, 365 transitions, 4306 flow. Second operand 11 states and 170 transitions. [2024-06-27 21:41:02,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 394 transitions, 5581 flow [2024-06-27 21:41:04,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 394 transitions, 5485 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 21:41:04,757 INFO L231 Difference]: Finished difference. Result has 329 places, 365 transitions, 4308 flow [2024-06-27 21:41:04,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4210, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4308, PETRI_PLACES=329, PETRI_TRANSITIONS=365} [2024-06-27 21:41:04,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 21:41:04,757 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 365 transitions, 4308 flow [2024-06-27 21:41:04,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:04,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:04,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:04,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:41:04,758 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)] === [2024-06-27 21:41:04,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:04,758 INFO L85 PathProgramCache]: Analyzing trace with hash -473628059, now seen corresponding path program 17 times [2024-06-27 21:41:04,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:04,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711284602] [2024-06-27 21:41:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:04,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:08,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:08,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711284602] [2024-06-27 21:41:08,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711284602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:08,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:08,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:08,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912020446] [2024-06-27 21:41:08,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:08,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:08,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:08,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:08,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:08,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:08,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 365 transitions, 4308 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:08,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:08,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:08,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:09,952 INFO L124 PetriNetUnfolderBase]: 3283/5296 cut-off events. [2024-06-27 21:41:09,952 INFO L125 PetriNetUnfolderBase]: For 597074/597074 co-relation queries the response was YES. [2024-06-27 21:41:09,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37192 conditions, 5296 events. 3283/5296 cut-off events. For 597074/597074 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 32451 event pairs, 899 based on Foata normal form. 4/5299 useless extension candidates. Maximal degree in co-relation 37043. Up to 4943 conditions per place. [2024-06-27 21:41:10,014 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 357 selfloop transitions, 22 changer transitions 0/384 dead transitions. [2024-06-27 21:41:10,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 384 transitions, 5117 flow [2024-06-27 21:41:10,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:10,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 21:41:10,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-27 21:41:10,015 INFO L175 Difference]: Start difference. First operand has 329 places, 365 transitions, 4308 flow. Second operand 9 states and 136 transitions. [2024-06-27 21:41:10,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 384 transitions, 5117 flow [2024-06-27 21:41:11,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 384 transitions, 4896 flow, removed 27 selfloop flow, removed 12 redundant places. [2024-06-27 21:41:11,591 INFO L231 Difference]: Finished difference. Result has 326 places, 365 transitions, 4139 flow [2024-06-27 21:41:11,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4087, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4139, PETRI_PLACES=326, PETRI_TRANSITIONS=365} [2024-06-27 21:41:11,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-27 21:41:11,591 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 365 transitions, 4139 flow [2024-06-27 21:41:11,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:11,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:11,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:11,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:41:11,592 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)] === [2024-06-27 21:41:11,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:11,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1046780779, now seen corresponding path program 18 times [2024-06-27 21:41:11,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:11,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311774222] [2024-06-27 21:41:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:11,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:14,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:14,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311774222] [2024-06-27 21:41:14,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311774222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:14,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:14,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:14,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624572146] [2024-06-27 21:41:14,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:14,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:14,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:14,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:14,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:14,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 365 transitions, 4139 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:14,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:14,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:14,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:16,718 INFO L124 PetriNetUnfolderBase]: 3335/5357 cut-off events. [2024-06-27 21:41:16,719 INFO L125 PetriNetUnfolderBase]: For 627773/627773 co-relation queries the response was YES. [2024-06-27 21:41:16,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37585 conditions, 5357 events. 3335/5357 cut-off events. For 627773/627773 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 32794 event pairs, 806 based on Foata normal form. 4/5357 useless extension candidates. Maximal degree in co-relation 37436. Up to 4446 conditions per place. [2024-06-27 21:41:16,782 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 279 selfloop transitions, 120 changer transitions 0/404 dead transitions. [2024-06-27 21:41:16,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 404 transitions, 5789 flow [2024-06-27 21:41:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:41:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:41:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 21:41:16,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-27 21:41:16,784 INFO L175 Difference]: Start difference. First operand has 326 places, 365 transitions, 4139 flow. Second operand 11 states and 185 transitions. [2024-06-27 21:41:16,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 404 transitions, 5789 flow [2024-06-27 21:41:18,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 404 transitions, 5735 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:41:18,596 INFO L231 Difference]: Finished difference. Result has 329 places, 371 transitions, 4455 flow [2024-06-27 21:41:18,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4455, PETRI_PLACES=329, PETRI_TRANSITIONS=371} [2024-06-27 21:41:18,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 21:41:18,597 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 371 transitions, 4455 flow [2024-06-27 21:41:18,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:18,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:18,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:18,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:41:18,597 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)] === [2024-06-27 21:41:18,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1179343991, now seen corresponding path program 19 times [2024-06-27 21:41:18,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:18,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604780506] [2024-06-27 21:41:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:18,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:21,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:21,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604780506] [2024-06-27 21:41:21,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604780506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:21,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:21,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:21,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147275348] [2024-06-27 21:41:21,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:21,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:21,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:21,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:21,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:21,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:21,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 371 transitions, 4455 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:21,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:21,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:21,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:23,810 INFO L124 PetriNetUnfolderBase]: 3323/5341 cut-off events. [2024-06-27 21:41:23,811 INFO L125 PetriNetUnfolderBase]: For 618150/618150 co-relation queries the response was YES. [2024-06-27 21:41:23,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37590 conditions, 5341 events. 3323/5341 cut-off events. For 618150/618150 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 32724 event pairs, 800 based on Foata normal form. 4/5341 useless extension candidates. Maximal degree in co-relation 37440. Up to 4438 conditions per place. [2024-06-27 21:41:23,874 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 276 selfloop transitions, 121 changer transitions 0/402 dead transitions. [2024-06-27 21:41:23,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 402 transitions, 5762 flow [2024-06-27 21:41:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:41:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:41:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 21:41:23,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-27 21:41:23,875 INFO L175 Difference]: Start difference. First operand has 329 places, 371 transitions, 4455 flow. Second operand 11 states and 184 transitions. [2024-06-27 21:41:23,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 402 transitions, 5762 flow [2024-06-27 21:41:25,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 402 transitions, 5213 flow, removed 51 selfloop flow, removed 10 redundant places. [2024-06-27 21:41:25,874 INFO L231 Difference]: Finished difference. Result has 330 places, 371 transitions, 4154 flow [2024-06-27 21:41:25,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4154, PETRI_PLACES=330, PETRI_TRANSITIONS=371} [2024-06-27 21:41:25,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-27 21:41:25,874 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 371 transitions, 4154 flow [2024-06-27 21:41:25,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:25,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:25,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:25,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:41:25,875 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:25,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1379001971, now seen corresponding path program 20 times [2024-06-27 21:41:25,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:25,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640405625] [2024-06-27 21:41:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:25,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:28,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:28,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640405625] [2024-06-27 21:41:28,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640405625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:28,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:28,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:28,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603960340] [2024-06-27 21:41:28,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:28,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:28,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:28,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:28,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:28,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:28,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 371 transitions, 4154 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:28,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:28,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:28,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:30,878 INFO L124 PetriNetUnfolderBase]: 3311/5325 cut-off events. [2024-06-27 21:41:30,879 INFO L125 PetriNetUnfolderBase]: For 600086/600086 co-relation queries the response was YES. [2024-06-27 21:41:30,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36626 conditions, 5325 events. 3311/5325 cut-off events. For 600086/600086 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 32628 event pairs, 804 based on Foata normal form. 4/5325 useless extension candidates. Maximal degree in co-relation 36476. Up to 4430 conditions per place. [2024-06-27 21:41:30,939 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 124 changer transitions 0/406 dead transitions. [2024-06-27 21:41:30,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 406 transitions, 5487 flow [2024-06-27 21:41:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:41:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:41:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-27 21:41:30,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39087301587301587 [2024-06-27 21:41:30,940 INFO L175 Difference]: Start difference. First operand has 330 places, 371 transitions, 4154 flow. Second operand 12 states and 197 transitions. [2024-06-27 21:41:30,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 406 transitions, 5487 flow [2024-06-27 21:41:32,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 406 transitions, 5181 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 21:41:32,557 INFO L231 Difference]: Finished difference. Result has 332 places, 371 transitions, 4102 flow [2024-06-27 21:41:32,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3848, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4102, PETRI_PLACES=332, PETRI_TRANSITIONS=371} [2024-06-27 21:41:32,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-27 21:41:32,557 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 371 transitions, 4102 flow [2024-06-27 21:41:32,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:32,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:32,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:32,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:41:32,558 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)] === [2024-06-27 21:41:32,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:32,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2089806891, now seen corresponding path program 21 times [2024-06-27 21:41:32,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:32,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670555582] [2024-06-27 21:41:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:32,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:35,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:35,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670555582] [2024-06-27 21:41:35,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670555582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:35,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:35,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:35,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148705020] [2024-06-27 21:41:35,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:35,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:35,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:35,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:35,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:35,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 371 transitions, 4102 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:35,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:35,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:35,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:37,434 INFO L124 PetriNetUnfolderBase]: 3331/5353 cut-off events. [2024-06-27 21:41:37,434 INFO L125 PetriNetUnfolderBase]: For 610852/610852 co-relation queries the response was YES. [2024-06-27 21:41:37,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36821 conditions, 5353 events. 3331/5353 cut-off events. For 610852/610852 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 32819 event pairs, 824 based on Foata normal form. 4/5353 useless extension candidates. Maximal degree in co-relation 36670. Up to 4446 conditions per place. [2024-06-27 21:41:37,495 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 275 selfloop transitions, 120 changer transitions 0/400 dead transitions. [2024-06-27 21:41:37,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 400 transitions, 5462 flow [2024-06-27 21:41:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:41:37,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:41:37,497 INFO L175 Difference]: Start difference. First operand has 332 places, 371 transitions, 4102 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:41:37,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 400 transitions, 5462 flow [2024-06-27 21:41:39,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 400 transitions, 5152 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-06-27 21:41:39,387 INFO L231 Difference]: Finished difference. Result has 329 places, 374 transitions, 4099 flow [2024-06-27 21:41:39,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3805, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4099, PETRI_PLACES=329, PETRI_TRANSITIONS=374} [2024-06-27 21:41:39,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 21:41:39,388 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 374 transitions, 4099 flow [2024-06-27 21:41:39,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:39,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:39,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:39,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:41:39,388 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)] === [2024-06-27 21:41:39,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:39,389 INFO L85 PathProgramCache]: Analyzing trace with hash -578266063, now seen corresponding path program 22 times [2024-06-27 21:41:39,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:39,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679295670] [2024-06-27 21:41:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:39,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:42,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:42,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679295670] [2024-06-27 21:41:42,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679295670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:42,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:42,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:42,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019450668] [2024-06-27 21:41:42,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:42,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:42,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:42,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:42,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:42,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:42,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 374 transitions, 4099 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:42,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:42,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:42,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:44,392 INFO L124 PetriNetUnfolderBase]: 3319/5344 cut-off events. [2024-06-27 21:41:44,393 INFO L125 PetriNetUnfolderBase]: For 596945/596945 co-relation queries the response was YES. [2024-06-27 21:41:44,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36111 conditions, 5344 events. 3319/5344 cut-off events. For 596945/596945 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32848 event pairs, 881 based on Foata normal form. 4/5347 useless extension candidates. Maximal degree in co-relation 35961. Up to 4949 conditions per place. [2024-06-27 21:41:44,453 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 25 changer transitions 0/397 dead transitions. [2024-06-27 21:41:44,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 397 transitions, 4947 flow [2024-06-27 21:41:44,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:41:44,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 21:41:44,455 INFO L175 Difference]: Start difference. First operand has 329 places, 374 transitions, 4099 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:41:44,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 397 transitions, 4947 flow [2024-06-27 21:41:46,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 397 transitions, 4586 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 21:41:46,516 INFO L231 Difference]: Finished difference. Result has 330 places, 374 transitions, 3794 flow [2024-06-27 21:41:46,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3738, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3794, PETRI_PLACES=330, PETRI_TRANSITIONS=374} [2024-06-27 21:41:46,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-27 21:41:46,516 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 374 transitions, 3794 flow [2024-06-27 21:41:46,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:46,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:46,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:46,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:41:46,517 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)] === [2024-06-27 21:41:46,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2090163081, now seen corresponding path program 23 times [2024-06-27 21:41:46,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:46,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134566734] [2024-06-27 21:41:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:46,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:49,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:49,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134566734] [2024-06-27 21:41:49,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134566734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:49,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:49,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:49,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304786336] [2024-06-27 21:41:49,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:49,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:49,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:49,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:49,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:49,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:49,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 374 transitions, 3794 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:49,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:49,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:49,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:51,478 INFO L124 PetriNetUnfolderBase]: 3307/5321 cut-off events. [2024-06-27 21:41:51,478 INFO L125 PetriNetUnfolderBase]: For 580155/580155 co-relation queries the response was YES. [2024-06-27 21:41:51,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35095 conditions, 5321 events. 3307/5321 cut-off events. For 580155/580155 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 32678 event pairs, 820 based on Foata normal form. 4/5321 useless extension candidates. Maximal degree in co-relation 34944. Up to 4430 conditions per place. [2024-06-27 21:41:51,536 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 122 changer transitions 0/398 dead transitions. [2024-06-27 21:41:51,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 398 transitions, 4649 flow [2024-06-27 21:41:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:41:51,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:41:51,538 INFO L175 Difference]: Start difference. First operand has 330 places, 374 transitions, 3794 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:41:51,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 398 transitions, 4649 flow [2024-06-27 21:41:53,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 398 transitions, 4543 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 21:41:53,959 INFO L231 Difference]: Finished difference. Result has 330 places, 374 transitions, 3938 flow [2024-06-27 21:41:53,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3688, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3938, PETRI_PLACES=330, PETRI_TRANSITIONS=374} [2024-06-27 21:41:53,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-27 21:41:53,960 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 374 transitions, 3938 flow [2024-06-27 21:41:53,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:53,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:53,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:53,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:41:53,960 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)] === [2024-06-27 21:41:53,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:53,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1031642135, now seen corresponding path program 4 times [2024-06-27 21:41:53,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:53,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880995241] [2024-06-27 21:41:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:53,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:57,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880995241] [2024-06-27 21:41:57,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880995241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:57,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:57,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867034450] [2024-06-27 21:41:57,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:57,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:57,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:57,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 374 transitions, 3938 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:57,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:57,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:57,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:59,223 INFO L124 PetriNetUnfolderBase]: 3289/5295 cut-off events. [2024-06-27 21:41:59,224 INFO L125 PetriNetUnfolderBase]: For 564930/564930 co-relation queries the response was YES. [2024-06-27 21:41:59,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34402 conditions, 5295 events. 3289/5295 cut-off events. For 564930/564930 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32578 event pairs, 850 based on Foata normal form. 8/5299 useless extension candidates. Maximal degree in co-relation 34250. Up to 4762 conditions per place. [2024-06-27 21:41:59,289 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 352 selfloop transitions, 43 changer transitions 0/400 dead transitions. [2024-06-27 21:41:59,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 400 transitions, 4834 flow [2024-06-27 21:41:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:41:59,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 21:41:59,290 INFO L175 Difference]: Start difference. First operand has 330 places, 374 transitions, 3938 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:41:59,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 400 transitions, 4834 flow [2024-06-27 21:42:01,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 400 transitions, 4532 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 21:42:01,737 INFO L231 Difference]: Finished difference. Result has 330 places, 374 transitions, 3726 flow [2024-06-27 21:42:01,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3636, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3726, PETRI_PLACES=330, PETRI_TRANSITIONS=374} [2024-06-27 21:42:01,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-27 21:42:01,737 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 374 transitions, 3726 flow [2024-06-27 21:42:01,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:01,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:01,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:01,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:42:01,738 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)] === [2024-06-27 21:42:01,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1473148025, now seen corresponding path program 7 times [2024-06-27 21:42:01,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:01,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328599864] [2024-06-27 21:42:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:01,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:05,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:05,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328599864] [2024-06-27 21:42:05,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328599864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:05,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:05,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:05,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618611194] [2024-06-27 21:42:05,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:05,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:05,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:05,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:05,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:05,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:05,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 374 transitions, 3726 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:05,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:05,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:05,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:07,465 INFO L124 PetriNetUnfolderBase]: 3389/5451 cut-off events. [2024-06-27 21:42:07,465 INFO L125 PetriNetUnfolderBase]: For 650521/650521 co-relation queries the response was YES. [2024-06-27 21:42:07,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36319 conditions, 5451 events. 3389/5451 cut-off events. For 650521/650521 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33558 event pairs, 625 based on Foata normal form. 8/5457 useless extension candidates. Maximal degree in co-relation 36166. Up to 4498 conditions per place. [2024-06-27 21:42:07,535 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 96 changer transitions 0/419 dead transitions. [2024-06-27 21:42:07,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 419 transitions, 4988 flow [2024-06-27 21:42:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:42:07,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:42:07,537 INFO L175 Difference]: Start difference. First operand has 330 places, 374 transitions, 3726 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:42:07,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 419 transitions, 4988 flow [2024-06-27 21:42:09,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 419 transitions, 4850 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 21:42:09,798 INFO L231 Difference]: Finished difference. Result has 331 places, 376 transitions, 3826 flow [2024-06-27 21:42:09,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3826, PETRI_PLACES=331, PETRI_TRANSITIONS=376} [2024-06-27 21:42:09,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-27 21:42:09,798 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 376 transitions, 3826 flow [2024-06-27 21:42:09,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:09,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:09,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:09,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:42:09,799 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)] === [2024-06-27 21:42:09,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:09,799 INFO L85 PathProgramCache]: Analyzing trace with hash 662239389, now seen corresponding path program 8 times [2024-06-27 21:42:09,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:09,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345666890] [2024-06-27 21:42:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:09,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:12,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:12,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345666890] [2024-06-27 21:42:12,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345666890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:12,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:12,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:42:12,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597579625] [2024-06-27 21:42:12,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:12,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:42:12,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:42:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:42:12,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:12,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 376 transitions, 3826 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:12,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:12,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:12,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:14,928 INFO L124 PetriNetUnfolderBase]: 3433/5525 cut-off events. [2024-06-27 21:42:14,929 INFO L125 PetriNetUnfolderBase]: For 688668/688668 co-relation queries the response was YES. [2024-06-27 21:42:14,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37043 conditions, 5525 events. 3433/5525 cut-off events. For 688668/688668 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34109 event pairs, 651 based on Foata normal form. 12/5535 useless extension candidates. Maximal degree in co-relation 36890. Up to 4726 conditions per place. [2024-06-27 21:42:14,996 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 90 changer transitions 0/413 dead transitions. [2024-06-27 21:42:14,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 413 transitions, 4804 flow [2024-06-27 21:42:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:42:14,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:42:14,998 INFO L175 Difference]: Start difference. First operand has 331 places, 376 transitions, 3826 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:42:14,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 413 transitions, 4804 flow [2024-06-27 21:42:16,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 413 transitions, 4674 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:42:16,910 INFO L231 Difference]: Finished difference. Result has 335 places, 377 transitions, 3905 flow [2024-06-27 21:42:16,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3905, PETRI_PLACES=335, PETRI_TRANSITIONS=377} [2024-06-27 21:42:16,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-27 21:42:16,910 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 377 transitions, 3905 flow [2024-06-27 21:42:16,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:16,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:16,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:16,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:42:16,911 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)] === [2024-06-27 21:42:16,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:16,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1171466513, now seen corresponding path program 9 times [2024-06-27 21:42:16,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:16,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915760663] [2024-06-27 21:42:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:16,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:20,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:20,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915760663] [2024-06-27 21:42:20,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915760663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:20,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:20,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:20,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971309367] [2024-06-27 21:42:20,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:20,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:20,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:20,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:20,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:20,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:20,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 377 transitions, 3905 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:20,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:20,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:20,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:22,574 INFO L124 PetriNetUnfolderBase]: 3461/5569 cut-off events. [2024-06-27 21:42:22,574 INFO L125 PetriNetUnfolderBase]: For 673070/673070 co-relation queries the response was YES. [2024-06-27 21:42:22,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37559 conditions, 5569 events. 3461/5569 cut-off events. For 673070/673070 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34368 event pairs, 645 based on Foata normal form. 8/5575 useless extension candidates. Maximal degree in co-relation 37404. Up to 4732 conditions per place. [2024-06-27 21:42:22,647 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 320 selfloop transitions, 92 changer transitions 0/417 dead transitions. [2024-06-27 21:42:22,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 417 transitions, 4905 flow [2024-06-27 21:42:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:42:22,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:42:22,649 INFO L175 Difference]: Start difference. First operand has 335 places, 377 transitions, 3905 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:42:22,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 417 transitions, 4905 flow [2024-06-27 21:42:24,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 417 transitions, 4720 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:42:24,713 INFO L231 Difference]: Finished difference. Result has 337 places, 378 transitions, 3930 flow [2024-06-27 21:42:24,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3720, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3930, PETRI_PLACES=337, PETRI_TRANSITIONS=378} [2024-06-27 21:42:24,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 21:42:24,714 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 378 transitions, 3930 flow [2024-06-27 21:42:24,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:24,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:24,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:24,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:42:24,714 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)] === [2024-06-27 21:42:24,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:24,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1224986647, now seen corresponding path program 10 times [2024-06-27 21:42:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:24,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323394416] [2024-06-27 21:42:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:24,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:28,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:28,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323394416] [2024-06-27 21:42:28,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323394416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:28,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:28,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:28,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271109152] [2024-06-27 21:42:28,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:28,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:28,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:28,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:28,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:28,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 378 transitions, 3930 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:28,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:28,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:28,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:30,283 INFO L124 PetriNetUnfolderBase]: 3535/5711 cut-off events. [2024-06-27 21:42:30,283 INFO L125 PetriNetUnfolderBase]: For 737934/737934 co-relation queries the response was YES. [2024-06-27 21:42:30,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39320 conditions, 5711 events. 3535/5711 cut-off events. For 737934/737934 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35543 event pairs, 623 based on Foata normal form. 8/5717 useless extension candidates. Maximal degree in co-relation 39164. Up to 3774 conditions per place. [2024-06-27 21:42:30,355 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 119 changer transitions 0/428 dead transitions. [2024-06-27 21:42:30,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 428 transitions, 5498 flow [2024-06-27 21:42:30,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:42:30,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 21:42:30,357 INFO L175 Difference]: Start difference. First operand has 337 places, 378 transitions, 3930 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:42:30,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 428 transitions, 5498 flow [2024-06-27 21:42:33,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 428 transitions, 5302 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:42:33,066 INFO L231 Difference]: Finished difference. Result has 339 places, 380 transitions, 4022 flow [2024-06-27 21:42:33,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4022, PETRI_PLACES=339, PETRI_TRANSITIONS=380} [2024-06-27 21:42:33,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-27 21:42:33,066 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 380 transitions, 4022 flow [2024-06-27 21:42:33,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:33,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:33,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:33,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:42:33,067 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)] === [2024-06-27 21:42:33,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:33,067 INFO L85 PathProgramCache]: Analyzing trace with hash -870307897, now seen corresponding path program 11 times [2024-06-27 21:42:33,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:33,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921117333] [2024-06-27 21:42:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:33,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:36,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:36,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921117333] [2024-06-27 21:42:36,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921117333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:36,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:36,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:36,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613336915] [2024-06-27 21:42:36,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:36,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:36,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:36,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:36,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:36,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:36,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 380 transitions, 4022 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:36,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:36,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:36,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:38,554 INFO L124 PetriNetUnfolderBase]: 3563/5740 cut-off events. [2024-06-27 21:42:38,567 INFO L125 PetriNetUnfolderBase]: For 753617/753617 co-relation queries the response was YES. [2024-06-27 21:42:38,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40036 conditions, 5740 events. 3563/5740 cut-off events. For 753617/753617 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 35717 event pairs, 776 based on Foata normal form. 8/5747 useless extension candidates. Maximal degree in co-relation 39879. Up to 5057 conditions per place. [2024-06-27 21:42:38,661 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 35 changer transitions 0/421 dead transitions. [2024-06-27 21:42:38,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 421 transitions, 5044 flow [2024-06-27 21:42:38,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:42:38,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 21:42:38,662 INFO L175 Difference]: Start difference. First operand has 339 places, 380 transitions, 4022 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:42:38,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 421 transitions, 5044 flow [2024-06-27 21:42:41,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 421 transitions, 4784 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:42:41,804 INFO L231 Difference]: Finished difference. Result has 342 places, 381 transitions, 3862 flow [2024-06-27 21:42:41,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3862, PETRI_PLACES=342, PETRI_TRANSITIONS=381} [2024-06-27 21:42:41,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-27 21:42:41,804 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 381 transitions, 3862 flow [2024-06-27 21:42:41,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:41,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:41,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:41,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:42:41,805 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)] === [2024-06-27 21:42:41,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:41,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1202711917, now seen corresponding path program 12 times [2024-06-27 21:42:41,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:41,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611035442] [2024-06-27 21:42:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:41,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:45,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:45,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611035442] [2024-06-27 21:42:45,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611035442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:45,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:45,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:45,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830948839] [2024-06-27 21:42:45,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:45,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:45,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:45,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:45,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:45,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:45,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 381 transitions, 3862 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:45,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:45,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:45,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:47,506 INFO L124 PetriNetUnfolderBase]: 3591/5803 cut-off events. [2024-06-27 21:42:47,507 INFO L125 PetriNetUnfolderBase]: For 762563/762563 co-relation queries the response was YES. [2024-06-27 21:42:47,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39782 conditions, 5803 events. 3591/5803 cut-off events. For 762563/762563 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 36310 event pairs, 633 based on Foata normal form. 8/5809 useless extension candidates. Maximal degree in co-relation 39624. Up to 3806 conditions per place. [2024-06-27 21:42:47,574 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 303 selfloop transitions, 118 changer transitions 0/426 dead transitions. [2024-06-27 21:42:47,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 426 transitions, 5146 flow [2024-06-27 21:42:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:42:47,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:42:47,576 INFO L175 Difference]: Start difference. First operand has 342 places, 381 transitions, 3862 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:42:47,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 426 transitions, 5146 flow [2024-06-27 21:42:50,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 426 transitions, 5050 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 21:42:50,619 INFO L231 Difference]: Finished difference. Result has 344 places, 382 transitions, 4026 flow [2024-06-27 21:42:50,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4026, PETRI_PLACES=344, PETRI_TRANSITIONS=382} [2024-06-27 21:42:50,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 21:42:50,619 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 382 transitions, 4026 flow [2024-06-27 21:42:50,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:50,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:50,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:50,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:42:50,620 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)] === [2024-06-27 21:42:50,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash -176632663, now seen corresponding path program 13 times [2024-06-27 21:42:50,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:50,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220100555] [2024-06-27 21:42:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:50,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:54,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:54,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220100555] [2024-06-27 21:42:54,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220100555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:54,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:54,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:42:54,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963297101] [2024-06-27 21:42:54,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:54,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:42:54,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:54,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:42:54,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:42:54,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:54,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 382 transitions, 4026 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:54,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:54,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:54,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:56,144 INFO L124 PetriNetUnfolderBase]: 3635/5868 cut-off events. [2024-06-27 21:42:56,144 INFO L125 PetriNetUnfolderBase]: For 804931/804931 co-relation queries the response was YES. [2024-06-27 21:42:56,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40836 conditions, 5868 events. 3635/5868 cut-off events. For 804931/804931 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36721 event pairs, 880 based on Foata normal form. 12/5879 useless extension candidates. Maximal degree in co-relation 40677. Up to 5363 conditions per place. [2024-06-27 21:42:56,219 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 30 changer transitions 0/415 dead transitions. [2024-06-27 21:42:56,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 415 transitions, 4996 flow [2024-06-27 21:42:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:42:56,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 21:42:56,220 INFO L175 Difference]: Start difference. First operand has 344 places, 382 transitions, 4026 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:42:56,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 415 transitions, 4996 flow [2024-06-27 21:42:59,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 415 transitions, 4813 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:42:59,137 INFO L231 Difference]: Finished difference. Result has 347 places, 383 transitions, 3934 flow [2024-06-27 21:42:59,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3934, PETRI_PLACES=347, PETRI_TRANSITIONS=383} [2024-06-27 21:42:59,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-27 21:42:59,138 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 383 transitions, 3934 flow [2024-06-27 21:42:59,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:59,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:59,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:59,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:42:59,138 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)] === [2024-06-27 21:42:59,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:59,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1598828353, now seen corresponding path program 14 times [2024-06-27 21:42:59,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:59,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829669389] [2024-06-27 21:42:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:59,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:02,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:02,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829669389] [2024-06-27 21:43:02,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829669389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:02,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:02,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:02,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425344121] [2024-06-27 21:43:02,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:02,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:02,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:02,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:02,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:02,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:02,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 383 transitions, 3934 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:02,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:02,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:02,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:04,887 INFO L124 PetriNetUnfolderBase]: 3707/5988 cut-off events. [2024-06-27 21:43:04,887 INFO L125 PetriNetUnfolderBase]: For 817292/817292 co-relation queries the response was YES. [2024-06-27 21:43:04,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40999 conditions, 5988 events. 3707/5988 cut-off events. For 817292/817292 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 37757 event pairs, 872 based on Foata normal form. 12/5999 useless extension candidates. Maximal degree in co-relation 40839. Up to 5355 conditions per place. [2024-06-27 21:43:04,956 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 387 selfloop transitions, 32 changer transitions 0/424 dead transitions. [2024-06-27 21:43:04,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 424 transitions, 4984 flow [2024-06-27 21:43:04,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:43:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:43:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-27 21:43:04,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:43:04,957 INFO L175 Difference]: Start difference. First operand has 347 places, 383 transitions, 3934 flow. Second operand 10 states and 168 transitions. [2024-06-27 21:43:04,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 424 transitions, 4984 flow [2024-06-27 21:43:07,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 424 transitions, 4915 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:43:07,807 INFO L231 Difference]: Finished difference. Result has 351 places, 385 transitions, 3977 flow [2024-06-27 21:43:07,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3865, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3977, PETRI_PLACES=351, PETRI_TRANSITIONS=385} [2024-06-27 21:43:07,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-27 21:43:07,807 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 385 transitions, 3977 flow [2024-06-27 21:43:07,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:07,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:07,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:07,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:43:07,808 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)] === [2024-06-27 21:43:07,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash -433916251, now seen corresponding path program 15 times [2024-06-27 21:43:07,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:07,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174879345] [2024-06-27 21:43:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:07,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:11,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:11,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174879345] [2024-06-27 21:43:11,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174879345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:11,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:11,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:11,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990704840] [2024-06-27 21:43:11,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:11,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:11,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:11,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:11,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:11,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:11,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 385 transitions, 3977 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:11,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:11,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:11,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:13,706 INFO L124 PetriNetUnfolderBase]: 3751/6059 cut-off events. [2024-06-27 21:43:13,706 INFO L125 PetriNetUnfolderBase]: For 835582/835582 co-relation queries the response was YES. [2024-06-27 21:43:13,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41614 conditions, 6059 events. 3751/6059 cut-off events. For 835582/835582 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 38349 event pairs, 761 based on Foata normal form. 12/6069 useless extension candidates. Maximal degree in co-relation 41452. Up to 5220 conditions per place. [2024-06-27 21:43:13,790 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 326 selfloop transitions, 88 changer transitions 0/419 dead transitions. [2024-06-27 21:43:13,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 419 transitions, 4958 flow [2024-06-27 21:43:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:13,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:43:13,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 21:43:13,792 INFO L175 Difference]: Start difference. First operand has 351 places, 385 transitions, 3977 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:43:13,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 419 transitions, 4958 flow [2024-06-27 21:43:17,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 419 transitions, 4890 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:43:17,232 INFO L231 Difference]: Finished difference. Result has 353 places, 386 transitions, 4117 flow [2024-06-27 21:43:17,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3909, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4117, PETRI_PLACES=353, PETRI_TRANSITIONS=386} [2024-06-27 21:43:17,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-27 21:43:17,233 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 386 transitions, 4117 flow [2024-06-27 21:43:17,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:17,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:17,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:17,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:43:17,233 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)] === [2024-06-27 21:43:17,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash 977408357, now seen corresponding path program 16 times [2024-06-27 21:43:17,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:17,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303303215] [2024-06-27 21:43:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:17,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:20,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:20,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303303215] [2024-06-27 21:43:20,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303303215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:20,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:20,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:20,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119140943] [2024-06-27 21:43:20,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:20,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:20,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:20,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:20,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:20,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 386 transitions, 4117 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:20,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:20,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:20,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:22,210 INFO L124 PetriNetUnfolderBase]: 3779/6099 cut-off events. [2024-06-27 21:43:22,210 INFO L125 PetriNetUnfolderBase]: For 820248/820248 co-relation queries the response was YES. [2024-06-27 21:43:22,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42179 conditions, 6099 events. 3779/6099 cut-off events. For 820248/820248 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38557 event pairs, 755 based on Foata normal form. 8/6105 useless extension candidates. Maximal degree in co-relation 42016. Up to 5174 conditions per place. [2024-06-27 21:43:22,290 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 326 selfloop transitions, 91 changer transitions 0/422 dead transitions. [2024-06-27 21:43:22,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 422 transitions, 5120 flow [2024-06-27 21:43:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:22,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:43:22,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 21:43:22,292 INFO L175 Difference]: Start difference. First operand has 353 places, 386 transitions, 4117 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:43:22,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 422 transitions, 5120 flow [2024-06-27 21:43:25,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 422 transitions, 4933 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:43:25,812 INFO L231 Difference]: Finished difference. Result has 355 places, 387 transitions, 4145 flow [2024-06-27 21:43:25,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3930, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4145, PETRI_PLACES=355, PETRI_TRANSITIONS=387} [2024-06-27 21:43:25,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-27 21:43:25,813 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 387 transitions, 4145 flow [2024-06-27 21:43:25,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:25,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:25,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:25,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:43:25,813 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)] === [2024-06-27 21:43:25,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:25,814 INFO L85 PathProgramCache]: Analyzing trace with hash -722084365, now seen corresponding path program 17 times [2024-06-27 21:43:25,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:25,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145100642] [2024-06-27 21:43:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:25,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:29,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:29,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145100642] [2024-06-27 21:43:29,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145100642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:29,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:29,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:29,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005799508] [2024-06-27 21:43:29,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:29,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:29,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:29,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:29,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:29,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 387 transitions, 4145 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:29,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:29,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:29,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:30,909 INFO L124 PetriNetUnfolderBase]: 3853/6249 cut-off events. [2024-06-27 21:43:30,910 INFO L125 PetriNetUnfolderBase]: For 890736/890736 co-relation queries the response was YES. [2024-06-27 21:43:30,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43922 conditions, 6249 events. 3853/6249 cut-off events. For 890736/890736 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 39883 event pairs, 751 based on Foata normal form. 8/6255 useless extension candidates. Maximal degree in co-relation 43758. Up to 4848 conditions per place. [2024-06-27 21:43:30,994 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 322 selfloop transitions, 102 changer transitions 0/429 dead transitions. [2024-06-27 21:43:30,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 429 transitions, 5473 flow [2024-06-27 21:43:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:43:30,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:43:30,996 INFO L175 Difference]: Start difference. First operand has 355 places, 387 transitions, 4145 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:43:30,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 429 transitions, 5473 flow [2024-06-27 21:43:34,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 429 transitions, 5273 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:43:34,815 INFO L231 Difference]: Finished difference. Result has 357 places, 389 transitions, 4201 flow [2024-06-27 21:43:34,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3945, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4201, PETRI_PLACES=357, PETRI_TRANSITIONS=389} [2024-06-27 21:43:34,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-27 21:43:34,816 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 389 transitions, 4201 flow [2024-06-27 21:43:34,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:34,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:34,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:34,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:43:34,816 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)] === [2024-06-27 21:43:34,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash -7539419, now seen corresponding path program 18 times [2024-06-27 21:43:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:34,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939025162] [2024-06-27 21:43:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:34,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:38,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:38,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939025162] [2024-06-27 21:43:38,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939025162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:38,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:38,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:38,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874377620] [2024-06-27 21:43:38,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:38,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:38,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:38,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 389 transitions, 4201 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:38,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:38,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:38,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:40,478 INFO L124 PetriNetUnfolderBase]: 3835/6196 cut-off events. [2024-06-27 21:43:40,479 INFO L125 PetriNetUnfolderBase]: For 843541/843541 co-relation queries the response was YES. [2024-06-27 21:43:40,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42942 conditions, 6196 events. 3835/6196 cut-off events. For 843541/843541 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 39397 event pairs, 900 based on Foata normal form. 8/6203 useless extension candidates. Maximal degree in co-relation 42777. Up to 5613 conditions per place. [2024-06-27 21:43:40,551 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 391 selfloop transitions, 30 changer transitions 0/426 dead transitions. [2024-06-27 21:43:40,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 426 transitions, 5199 flow [2024-06-27 21:43:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:43:40,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 21:43:40,553 INFO L175 Difference]: Start difference. First operand has 357 places, 389 transitions, 4201 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:43:40,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 426 transitions, 5199 flow [2024-06-27 21:43:44,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 426 transitions, 5051 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:43:44,011 INFO L231 Difference]: Finished difference. Result has 361 places, 389 transitions, 4117 flow [2024-06-27 21:43:44,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4117, PETRI_PLACES=361, PETRI_TRANSITIONS=389} [2024-06-27 21:43:44,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-27 21:43:44,012 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 389 transitions, 4117 flow [2024-06-27 21:43:44,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:44,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:44,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:44,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:43:44,012 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)] === [2024-06-27 21:43:44,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:44,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1720303719, now seen corresponding path program 19 times [2024-06-27 21:43:44,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:44,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568532824] [2024-06-27 21:43:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:44,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:47,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:47,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568532824] [2024-06-27 21:43:47,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568532824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:47,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:47,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:47,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788550432] [2024-06-27 21:43:47,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:47,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:47,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:47,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:47,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:47,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:47,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 389 transitions, 4117 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:47,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:47,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:47,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:50,226 INFO L124 PetriNetUnfolderBase]: 3879/6270 cut-off events. [2024-06-27 21:43:50,226 INFO L125 PetriNetUnfolderBase]: For 889507/889507 co-relation queries the response was YES. [2024-06-27 21:43:50,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43478 conditions, 6270 events. 3879/6270 cut-off events. For 889507/889507 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 39929 event pairs, 1081 based on Foata normal form. 12/6281 useless extension candidates. Maximal degree in co-relation 43311. Up to 5745 conditions per place. [2024-06-27 21:43:50,307 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 388 selfloop transitions, 33 changer transitions 0/426 dead transitions. [2024-06-27 21:43:50,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 426 transitions, 5120 flow [2024-06-27 21:43:50,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:43:50,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:43:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 196 transitions. [2024-06-27 21:43:50,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-06-27 21:43:50,309 INFO L175 Difference]: Start difference. First operand has 361 places, 389 transitions, 4117 flow. Second operand 13 states and 196 transitions. [2024-06-27 21:43:50,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 426 transitions, 5120 flow [2024-06-27 21:43:54,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 426 transitions, 5033 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 21:43:54,321 INFO L231 Difference]: Finished difference. Result has 366 places, 390 transitions, 4132 flow [2024-06-27 21:43:54,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4030, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4132, PETRI_PLACES=366, PETRI_TRANSITIONS=390} [2024-06-27 21:43:54,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-27 21:43:54,322 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 390 transitions, 4132 flow [2024-06-27 21:43:54,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:54,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:54,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:54,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:43:54,322 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)] === [2024-06-27 21:43:54,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:54,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2089944097, now seen corresponding path program 20 times [2024-06-27 21:43:54,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:54,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192763355] [2024-06-27 21:43:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:54,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:57,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:57,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192763355] [2024-06-27 21:43:57,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192763355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:57,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:57,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:57,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369691504] [2024-06-27 21:43:57,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:57,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:57,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:57,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:57,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:57,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:57,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 390 transitions, 4132 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:57,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:57,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:57,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:59,767 INFO L124 PetriNetUnfolderBase]: 3923/6295 cut-off events. [2024-06-27 21:43:59,768 INFO L125 PetriNetUnfolderBase]: For 906552/906552 co-relation queries the response was YES. [2024-06-27 21:43:59,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43931 conditions, 6295 events. 3923/6295 cut-off events. For 906552/906552 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 39787 event pairs, 1012 based on Foata normal form. 12/6303 useless extension candidates. Maximal degree in co-relation 43764. Up to 5566 conditions per place. [2024-06-27 21:43:59,854 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 323 selfloop transitions, 91 changer transitions 0/419 dead transitions. [2024-06-27 21:43:59,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 419 transitions, 5104 flow [2024-06-27 21:43:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:43:59,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 21:43:59,856 INFO L175 Difference]: Start difference. First operand has 366 places, 390 transitions, 4132 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:43:59,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 419 transitions, 5104 flow [2024-06-27 21:44:03,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 419 transitions, 5023 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-27 21:44:03,135 INFO L231 Difference]: Finished difference. Result has 364 places, 391 transitions, 4271 flow [2024-06-27 21:44:03,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4051, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4271, PETRI_PLACES=364, PETRI_TRANSITIONS=391} [2024-06-27 21:44:03,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-27 21:44:03,135 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 391 transitions, 4271 flow [2024-06-27 21:44:03,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:03,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:03,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:03,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:44:03,136 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)] === [2024-06-27 21:44:03,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash 254363187, now seen corresponding path program 2 times [2024-06-27 21:44:03,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:03,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253086243] [2024-06-27 21:44:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:03,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:06,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:06,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253086243] [2024-06-27 21:44:06,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253086243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:06,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:06,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:44:06,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193684343] [2024-06-27 21:44:06,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:06,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:44:06,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:06,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:44:06,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:44:06,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:44:06,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 391 transitions, 4271 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:06,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:06,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:44:06,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:09,379 INFO L124 PetriNetUnfolderBase]: 3967/6406 cut-off events. [2024-06-27 21:44:09,379 INFO L125 PetriNetUnfolderBase]: For 920964/920964 co-relation queries the response was YES. [2024-06-27 21:44:09,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44691 conditions, 6406 events. 3967/6406 cut-off events. For 920964/920964 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40880 event pairs, 1101 based on Foata normal form. 12/6417 useless extension candidates. Maximal degree in co-relation 44523. Up to 5881 conditions per place. [2024-06-27 21:44:09,456 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 384 selfloop transitions, 33 changer transitions 0/422 dead transitions. [2024-06-27 21:44:09,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 422 transitions, 5251 flow [2024-06-27 21:44:09,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:44:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:44:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-27 21:44:09,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-27 21:44:09,458 INFO L175 Difference]: Start difference. First operand has 364 places, 391 transitions, 4271 flow. Second operand 11 states and 168 transitions. [2024-06-27 21:44:09,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 422 transitions, 5251 flow [2024-06-27 21:44:13,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 422 transitions, 5052 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:44:13,743 INFO L231 Difference]: Finished difference. Result has 368 places, 392 transitions, 4175 flow [2024-06-27 21:44:13,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4175, PETRI_PLACES=368, PETRI_TRANSITIONS=392} [2024-06-27 21:44:13,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 21:44:13,744 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 392 transitions, 4175 flow [2024-06-27 21:44:13,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:13,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:13,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:13,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:44:13,744 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)] === [2024-06-27 21:44:13,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:13,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2089947817, now seen corresponding path program 21 times [2024-06-27 21:44:13,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:13,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412875563] [2024-06-27 21:44:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:17,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:17,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412875563] [2024-06-27 21:44:17,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412875563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:17,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:17,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:44:17,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965501057] [2024-06-27 21:44:17,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:17,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:44:17,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:17,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:44:17,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:44:17,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:44:17,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 392 transitions, 4175 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:17,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:17,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:44:17,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:19,192 INFO L124 PetriNetUnfolderBase]: 3995/6407 cut-off events. [2024-06-27 21:44:19,192 INFO L125 PetriNetUnfolderBase]: For 903042/903042 co-relation queries the response was YES. [2024-06-27 21:44:19,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44709 conditions, 6407 events. 3995/6407 cut-off events. For 903042/903042 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 40502 event pairs, 1006 based on Foata normal form. 8/6411 useless extension candidates. Maximal degree in co-relation 44540. Up to 5508 conditions per place. [2024-06-27 21:44:19,279 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 95 changer transitions 0/424 dead transitions. [2024-06-27 21:44:19,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 424 transitions, 5431 flow [2024-06-27 21:44:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:44:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:44:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:44:19,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:44:19,281 INFO L175 Difference]: Start difference. First operand has 368 places, 392 transitions, 4175 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:44:19,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 424 transitions, 5431 flow [2024-06-27 21:44:22,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 424 transitions, 5350 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 21:44:22,477 INFO L231 Difference]: Finished difference. Result has 368 places, 393 transitions, 4321 flow [2024-06-27 21:44:22,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4094, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4321, PETRI_PLACES=368, PETRI_TRANSITIONS=393} [2024-06-27 21:44:22,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 21:44:22,478 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 393 transitions, 4321 flow [2024-06-27 21:44:22,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:22,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:22,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:22,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:44:22,478 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)] === [2024-06-27 21:44:22,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:22,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1379216677, now seen corresponding path program 3 times [2024-06-27 21:44:22,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:22,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902315007] [2024-06-27 21:44:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:22,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:26,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:26,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902315007] [2024-06-27 21:44:26,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902315007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:26,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:26,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:44:26,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211036960] [2024-06-27 21:44:26,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:26,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:44:26,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:26,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:44:26,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:44:26,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:44:26,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 393 transitions, 4321 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:26,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:26,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:44:26,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:28,997 INFO L124 PetriNetUnfolderBase]: 4179/6703 cut-off events. [2024-06-27 21:44:28,997 INFO L125 PetriNetUnfolderBase]: For 1316237/1316237 co-relation queries the response was YES. [2024-06-27 21:44:29,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46562 conditions, 6703 events. 4179/6703 cut-off events. For 1316237/1316237 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 42606 event pairs, 1068 based on Foata normal form. 56/6755 useless extension candidates. Maximal degree in co-relation 46392. Up to 5730 conditions per place. [2024-06-27 21:44:29,075 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 91 changer transitions 9/433 dead transitions. [2024-06-27 21:44:29,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 433 transitions, 5372 flow [2024-06-27 21:44:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:44:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:44:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 198 transitions. [2024-06-27 21:44:29,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:44:29,076 INFO L175 Difference]: Start difference. First operand has 368 places, 393 transitions, 4321 flow. Second operand 12 states and 198 transitions. [2024-06-27 21:44:29,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 433 transitions, 5372 flow [2024-06-27 21:44:32,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 433 transitions, 5140 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:44:32,712 INFO L231 Difference]: Finished difference. Result has 373 places, 388 transitions, 4256 flow [2024-06-27 21:44:32,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4089, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4256, PETRI_PLACES=373, PETRI_TRANSITIONS=388} [2024-06-27 21:44:32,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-27 21:44:32,713 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 388 transitions, 4256 flow [2024-06-27 21:44:32,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:32,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:32,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:32,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:44:32,713 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)] === [2024-06-27 21:44:32,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1179562975, now seen corresponding path program 22 times [2024-06-27 21:44:32,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:32,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171718684] [2024-06-27 21:44:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:32,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:36,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:36,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171718684] [2024-06-27 21:44:36,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171718684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:36,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:36,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:44:36,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623230786] [2024-06-27 21:44:36,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:36,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:44:36,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:36,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:44:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:44:36,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:44:36,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 388 transitions, 4256 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:36,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:36,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:44:36,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:38,539 INFO L124 PetriNetUnfolderBase]: 4173/6701 cut-off events. [2024-06-27 21:44:38,539 INFO L125 PetriNetUnfolderBase]: For 1302025/1302025 co-relation queries the response was YES. [2024-06-27 21:44:38,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45981 conditions, 6701 events. 4173/6701 cut-off events. For 1302025/1302025 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42641 event pairs, 1070 based on Foata normal form. 56/6753 useless extension candidates. Maximal degree in co-relation 45810. Up to 5744 conditions per place. [2024-06-27 21:44:38,625 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 82 changer transitions 9/425 dead transitions. [2024-06-27 21:44:38,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 425 transitions, 5284 flow [2024-06-27 21:44:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:44:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:44:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 21:44:38,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-27 21:44:38,627 INFO L175 Difference]: Start difference. First operand has 373 places, 388 transitions, 4256 flow. Second operand 11 states and 184 transitions. [2024-06-27 21:44:38,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 425 transitions, 5284 flow [2024-06-27 21:44:42,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 425 transitions, 5085 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 21:44:42,806 INFO L231 Difference]: Finished difference. Result has 374 places, 383 transitions, 4214 flow [2024-06-27 21:44:42,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4214, PETRI_PLACES=374, PETRI_TRANSITIONS=383} [2024-06-27 21:44:42,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-27 21:44:42,806 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 383 transitions, 4214 flow [2024-06-27 21:44:42,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:42,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:42,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:42,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:44:42,807 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:42,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:42,807 INFO L85 PathProgramCache]: Analyzing trace with hash -855629483, now seen corresponding path program 4 times [2024-06-27 21:44:42,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:42,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187584945] [2024-06-27 21:44:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:42,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:46,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187584945] [2024-06-27 21:44:46,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187584945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:46,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:46,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:44:46,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578342081] [2024-06-27 21:44:46,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:46,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:44:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:44:46,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:44:46,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:44:46,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 383 transitions, 4214 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:46,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:46,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:44:46,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:48,710 INFO L124 PetriNetUnfolderBase]: 4037/6526 cut-off events. [2024-06-27 21:44:48,711 INFO L125 PetriNetUnfolderBase]: For 908666/908666 co-relation queries the response was YES. [2024-06-27 21:44:48,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44995 conditions, 6526 events. 4037/6526 cut-off events. For 908666/908666 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 41849 event pairs, 1095 based on Foata normal form. 8/6533 useless extension candidates. Maximal degree in co-relation 44823. Up to 5833 conditions per place. [2024-06-27 21:44:48,799 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 377 selfloop transitions, 37 changer transitions 0/419 dead transitions. [2024-06-27 21:44:48,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 419 transitions, 5508 flow [2024-06-27 21:44:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:44:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:44:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-27 21:44:48,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36796536796536794 [2024-06-27 21:44:48,800 INFO L175 Difference]: Start difference. First operand has 374 places, 383 transitions, 4214 flow. Second operand 11 states and 170 transitions. [2024-06-27 21:44:48,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 419 transitions, 5508 flow [2024-06-27 21:44:52,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 419 transitions, 5276 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-27 21:44:52,890 INFO L231 Difference]: Finished difference. Result has 375 places, 386 transitions, 4134 flow [2024-06-27 21:44:52,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3982, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4134, PETRI_PLACES=375, PETRI_TRANSITIONS=386} [2024-06-27 21:44:52,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-27 21:44:52,891 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 386 transitions, 4134 flow [2024-06-27 21:44:52,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:52,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:52,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:52,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:44:52,891 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:52,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1179559255, now seen corresponding path program 23 times [2024-06-27 21:44:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:52,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987005258] [2024-06-27 21:44:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:52,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:56,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:56,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987005258] [2024-06-27 21:44:56,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987005258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:56,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:56,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:44:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128620633] [2024-06-27 21:44:56,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:56,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:44:56,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:56,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:44:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:44:56,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:44:56,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 386 transitions, 4134 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:56,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:56,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:44:56,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:59,019 INFO L124 PetriNetUnfolderBase]: 4375/7027 cut-off events. [2024-06-27 21:44:59,020 INFO L125 PetriNetUnfolderBase]: For 1580828/1580828 co-relation queries the response was YES. [2024-06-27 21:44:59,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51904 conditions, 7027 events. 4375/7027 cut-off events. For 1580828/1580828 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 44755 event pairs, 1116 based on Foata normal form. 48/7071 useless extension candidates. Maximal degree in co-relation 51730. Up to 5542 conditions per place. [2024-06-27 21:44:59,110 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 82 changer transitions 9/428 dead transitions. [2024-06-27 21:44:59,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 428 transitions, 5463 flow [2024-06-27 21:44:59,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:44:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:44:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 21:44:59,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 21:44:59,112 INFO L175 Difference]: Start difference. First operand has 375 places, 386 transitions, 4134 flow. Second operand 11 states and 189 transitions. [2024-06-27 21:44:59,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 428 transitions, 5463 flow [2024-06-27 21:45:03,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 428 transitions, 5395 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 21:45:03,730 INFO L231 Difference]: Finished difference. Result has 379 places, 381 transitions, 4166 flow [2024-06-27 21:45:03,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4166, PETRI_PLACES=379, PETRI_TRANSITIONS=381} [2024-06-27 21:45:03,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-27 21:45:03,731 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 381 transitions, 4166 flow [2024-06-27 21:45:03,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:03,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:03,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:03,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:45:03,731 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:45:03,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:03,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1699324537, now seen corresponding path program 5 times [2024-06-27 21:45:03,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:03,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025155489] [2024-06-27 21:45:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:03,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:07,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:07,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025155489] [2024-06-27 21:45:07,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025155489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:07,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:07,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:45:07,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391485473] [2024-06-27 21:45:07,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:07,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:45:07,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:45:07,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:45:07,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:45:07,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 381 transitions, 4166 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:07,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:07,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:45:07,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:09,757 INFO L124 PetriNetUnfolderBase]: 4295/6958 cut-off events. [2024-06-27 21:45:09,757 INFO L125 PetriNetUnfolderBase]: For 1284648/1284648 co-relation queries the response was YES. [2024-06-27 21:45:09,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51805 conditions, 6958 events. 4295/6958 cut-off events. For 1284648/1284648 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 44974 event pairs, 1235 based on Foata normal form. 12/6969 useless extension candidates. Maximal degree in co-relation 51629. Up to 6237 conditions per place. [2024-06-27 21:45:10,016 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 382 selfloop transitions, 36 changer transitions 0/423 dead transitions. [2024-06-27 21:45:10,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 423 transitions, 5216 flow [2024-06-27 21:45:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:45:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:45:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 199 transitions. [2024-06-27 21:45:10,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36446886446886445 [2024-06-27 21:45:10,017 INFO L175 Difference]: Start difference. First operand has 379 places, 381 transitions, 4166 flow. Second operand 13 states and 199 transitions. [2024-06-27 21:45:10,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 423 transitions, 5216 flow [2024-06-27 21:45:16,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 423 transitions, 4893 flow, removed 12 selfloop flow, removed 15 redundant places. [2024-06-27 21:45:16,129 INFO L231 Difference]: Finished difference. Result has 378 places, 383 transitions, 3970 flow [2024-06-27 21:45:16,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3843, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3970, PETRI_PLACES=378, PETRI_TRANSITIONS=383} [2024-06-27 21:45:16,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-27 21:45:16,129 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 383 transitions, 3970 flow [2024-06-27 21:45:16,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:16,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:16,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:16,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:45:16,130 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:45:16,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash -400717391, now seen corresponding path program 6 times [2024-06-27 21:45:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:16,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405808282] [2024-06-27 21:45:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:16,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:19,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:19,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405808282] [2024-06-27 21:45:19,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405808282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:19,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:19,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:45:19,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279758025] [2024-06-27 21:45:19,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:19,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:45:19,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:45:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:45:19,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:45:19,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 383 transitions, 3970 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:19,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:19,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:45:19,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:21,779 INFO L124 PetriNetUnfolderBase]: 4183/6806 cut-off events. [2024-06-27 21:45:21,780 INFO L125 PetriNetUnfolderBase]: For 1016294/1016294 co-relation queries the response was YES. [2024-06-27 21:45:21,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47447 conditions, 6806 events. 4183/6806 cut-off events. For 1016294/1016294 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 44279 event pairs, 1071 based on Foata normal form. 8/6813 useless extension candidates. Maximal degree in co-relation 47269. Up to 5651 conditions per place. [2024-06-27 21:45:21,869 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 45 changer transitions 0/428 dead transitions. [2024-06-27 21:45:21,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 428 transitions, 5637 flow [2024-06-27 21:45:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:45:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:45:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-27 21:45:21,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:45:21,873 INFO L175 Difference]: Start difference. First operand has 378 places, 383 transitions, 3970 flow. Second operand 12 states and 189 transitions. [2024-06-27 21:45:21,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 428 transitions, 5637 flow [2024-06-27 21:45:26,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 428 transitions, 5562 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 21:45:26,640 INFO L231 Difference]: Finished difference. Result has 381 places, 387 transitions, 4088 flow [2024-06-27 21:45:26,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4088, PETRI_PLACES=381, PETRI_TRANSITIONS=387} [2024-06-27 21:45:26,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 21:45:26,640 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 387 transitions, 4088 flow [2024-06-27 21:45:26,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:26,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:26,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:26,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:45:26,641 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)] === [2024-06-27 21:45:26,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1386633427, now seen corresponding path program 7 times [2024-06-27 21:45:26,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:26,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673129592] [2024-06-27 21:45:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:26,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:30,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673129592] [2024-06-27 21:45:30,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673129592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:30,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:30,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:45:30,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213848230] [2024-06-27 21:45:30,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:30,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:45:30,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:30,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:45:30,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:45:30,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:45:30,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 387 transitions, 4088 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:30,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:30,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:45:30,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:32,996 INFO L124 PetriNetUnfolderBase]: 4289/6935 cut-off events. [2024-06-27 21:45:32,997 INFO L125 PetriNetUnfolderBase]: For 1320301/1320301 co-relation queries the response was YES. [2024-06-27 21:45:33,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47404 conditions, 6935 events. 4289/6935 cut-off events. For 1320301/1320301 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 44880 event pairs, 1098 based on Foata normal form. 48/6979 useless extension candidates. Maximal degree in co-relation 47224. Up to 5790 conditions per place. [2024-06-27 21:45:33,082 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 83 changer transitions 11/432 dead transitions. [2024-06-27 21:45:33,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 432 transitions, 5203 flow [2024-06-27 21:45:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:45:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:45:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-27 21:45:33,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:45:33,084 INFO L175 Difference]: Start difference. First operand has 381 places, 387 transitions, 4088 flow. Second operand 12 states and 201 transitions. [2024-06-27 21:45:33,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 432 transitions, 5203 flow [2024-06-27 21:45:37,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 432 transitions, 5088 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 21:45:37,946 INFO L231 Difference]: Finished difference. Result has 385 places, 384 transitions, 4130 flow [2024-06-27 21:45:37,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4130, PETRI_PLACES=385, PETRI_TRANSITIONS=384} [2024-06-27 21:45:37,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-27 21:45:37,947 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 384 transitions, 4130 flow [2024-06-27 21:45:37,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:37,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:37,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:37,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:45:37,947 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)] === [2024-06-27 21:45:37,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash -394051151, now seen corresponding path program 8 times [2024-06-27 21:45:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:37,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022204901] [2024-06-27 21:45:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:37,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:41,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:41,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022204901] [2024-06-27 21:45:41,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022204901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:41,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:41,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:45:41,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936575266] [2024-06-27 21:45:41,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:41,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:45:41,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:45:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:45:41,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:45:41,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 384 transitions, 4130 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:41,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:41,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:45:41,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:44,146 INFO L124 PetriNetUnfolderBase]: 4099/6658 cut-off events. [2024-06-27 21:45:44,146 INFO L125 PetriNetUnfolderBase]: For 898709/898709 co-relation queries the response was YES. [2024-06-27 21:45:44,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44875 conditions, 6658 events. 4099/6658 cut-off events. For 898709/898709 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 43240 event pairs, 1087 based on Foata normal form. 8/6665 useless extension candidates. Maximal degree in co-relation 44693. Up to 5545 conditions per place. [2024-06-27 21:45:44,239 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 373 selfloop transitions, 45 changer transitions 0/423 dead transitions. [2024-06-27 21:45:44,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 423 transitions, 5439 flow [2024-06-27 21:45:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:45:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:45:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-27 21:45:44,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 21:45:44,240 INFO L175 Difference]: Start difference. First operand has 385 places, 384 transitions, 4130 flow. Second operand 12 states and 186 transitions. [2024-06-27 21:45:44,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 423 transitions, 5439 flow [2024-06-27 21:45:47,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 423 transitions, 5174 flow, removed 20 selfloop flow, removed 14 redundant places. [2024-06-27 21:45:47,978 INFO L231 Difference]: Finished difference. Result has 383 places, 385 transitions, 3978 flow [2024-06-27 21:45:47,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3866, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3978, PETRI_PLACES=383, PETRI_TRANSITIONS=385} [2024-06-27 21:45:47,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-27 21:45:47,979 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 385 transitions, 3978 flow [2024-06-27 21:45:47,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:47,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:47,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:47,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:45:47,979 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)] === [2024-06-27 21:45:47,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:47,980 INFO L85 PathProgramCache]: Analyzing trace with hash -721025279, now seen corresponding path program 24 times [2024-06-27 21:45:47,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:47,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892349779] [2024-06-27 21:45:47,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:47,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:51,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:51,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892349779] [2024-06-27 21:45:51,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892349779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:51,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:51,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:45:51,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938742549] [2024-06-27 21:45:51,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:51,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:45:51,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:51,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:45:51,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:45:51,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:45:51,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 385 transitions, 3978 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:51,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:51,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:45:51,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:53,655 INFO L124 PetriNetUnfolderBase]: 4071/6642 cut-off events. [2024-06-27 21:45:53,656 INFO L125 PetriNetUnfolderBase]: For 836778/836778 co-relation queries the response was YES. [2024-06-27 21:45:53,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42369 conditions, 6642 events. 4071/6642 cut-off events. For 836778/836778 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 43387 event pairs, 1171 based on Foata normal form. 12/6653 useless extension candidates. Maximal degree in co-relation 42189. Up to 6109 conditions per place. [2024-06-27 21:45:53,739 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 384 selfloop transitions, 23 changer transitions 0/412 dead transitions. [2024-06-27 21:45:53,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 412 transitions, 4900 flow [2024-06-27 21:45:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:45:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:45:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:45:53,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:45:53,740 INFO L175 Difference]: Start difference. First operand has 383 places, 385 transitions, 3978 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:45:53,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 412 transitions, 4900 flow [2024-06-27 21:45:58,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 412 transitions, 4800 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 21:45:58,091 INFO L231 Difference]: Finished difference. Result has 383 places, 385 transitions, 3929 flow [2024-06-27 21:45:58,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3929, PETRI_PLACES=383, PETRI_TRANSITIONS=385} [2024-06-27 21:45:58,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-27 21:45:58,091 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 385 transitions, 3929 flow [2024-06-27 21:45:58,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:58,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:58,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:58,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 21:45:58,092 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)] === [2024-06-27 21:45:58,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:58,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1820259907, now seen corresponding path program 25 times [2024-06-27 21:45:58,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:58,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511955780] [2024-06-27 21:45:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:58,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:01,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:01,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511955780] [2024-06-27 21:46:01,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511955780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:01,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:01,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:46:01,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800638810] [2024-06-27 21:46:01,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:01,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:46:01,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:46:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:46:01,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:46:01,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 385 transitions, 3929 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:01,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:01,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:46:01,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:03,935 INFO L124 PetriNetUnfolderBase]: 4043/6602 cut-off events. [2024-06-27 21:46:03,936 INFO L125 PetriNetUnfolderBase]: For 730824/730824 co-relation queries the response was YES. [2024-06-27 21:46:04,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40094 conditions, 6602 events. 4043/6602 cut-off events. For 730824/730824 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 43125 event pairs, 1125 based on Foata normal form. 12/6613 useless extension candidates. Maximal degree in co-relation 39913. Up to 5949 conditions per place. [2024-06-27 21:46:04,025 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 389 selfloop transitions, 25 changer transitions 0/419 dead transitions. [2024-06-27 21:46:04,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 419 transitions, 4917 flow [2024-06-27 21:46:04,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:46:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:46:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:46:04,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 21:46:04,026 INFO L175 Difference]: Start difference. First operand has 383 places, 385 transitions, 3929 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:46:04,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 419 transitions, 4917 flow [2024-06-27 21:46:08,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 419 transitions, 4842 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 21:46:08,407 INFO L231 Difference]: Finished difference. Result has 385 places, 385 transitions, 3908 flow [2024-06-27 21:46:08,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3908, PETRI_PLACES=385, PETRI_TRANSITIONS=385} [2024-06-27 21:46:08,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-27 21:46:08,407 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 385 transitions, 3908 flow [2024-06-27 21:46:08,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:08,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:08,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:46:08,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 21:46:08,408 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)] === [2024-06-27 21:46:08,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1823834827, now seen corresponding path program 26 times [2024-06-27 21:46:08,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:08,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792262264] [2024-06-27 21:46:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:08,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:12,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:12,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792262264] [2024-06-27 21:46:12,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792262264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:12,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:12,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:46:12,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099174957] [2024-06-27 21:46:12,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:12,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:46:12,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:12,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:46:12,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:46:12,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:46:12,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 385 transitions, 3908 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:12,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:12,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:46:12,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:14,308 INFO L124 PetriNetUnfolderBase]: 4071/6608 cut-off events. [2024-06-27 21:46:14,308 INFO L125 PetriNetUnfolderBase]: For 705406/705406 co-relation queries the response was YES. [2024-06-27 21:46:14,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40333 conditions, 6608 events. 4071/6608 cut-off events. For 705406/705406 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 42988 event pairs, 1111 based on Foata normal form. 8/6615 useless extension candidates. Maximal degree in co-relation 40151. Up to 5999 conditions per place. [2024-06-27 21:46:14,385 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 388 selfloop transitions, 24 changer transitions 0/417 dead transitions. [2024-06-27 21:46:14,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 417 transitions, 4897 flow [2024-06-27 21:46:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:46:14,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:46:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 21:46:14,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-27 21:46:14,386 INFO L175 Difference]: Start difference. First operand has 385 places, 385 transitions, 3908 flow. Second operand 9 states and 145 transitions. [2024-06-27 21:46:14,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 417 transitions, 4897 flow [2024-06-27 21:46:18,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 417 transitions, 4842 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:46:18,827 INFO L231 Difference]: Finished difference. Result has 386 places, 386 transitions, 3936 flow [2024-06-27 21:46:18,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3853, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3936, PETRI_PLACES=386, PETRI_TRANSITIONS=386} [2024-06-27 21:46:18,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-27 21:46:18,828 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 386 transitions, 3936 flow [2024-06-27 21:46:18,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:18,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:18,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:46:18,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 21:46:18,828 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)] === [2024-06-27 21:46:18,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1302001799, now seen corresponding path program 27 times [2024-06-27 21:46:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:18,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135249536] [2024-06-27 21:46:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:18,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:22,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:22,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135249536] [2024-06-27 21:46:22,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135249536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:22,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:22,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:46:22,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214038724] [2024-06-27 21:46:22,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:22,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:46:22,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:22,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:46:22,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:46:22,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:46:22,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 386 transitions, 3936 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:22,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:22,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:46:22,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:24,335 INFO L124 PetriNetUnfolderBase]: 4285/6945 cut-off events. [2024-06-27 21:46:24,335 INFO L125 PetriNetUnfolderBase]: For 1072532/1072532 co-relation queries the response was YES. [2024-06-27 21:46:24,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46872 conditions, 6945 events. 4285/6945 cut-off events. For 1072532/1072532 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 44866 event pairs, 1112 based on Foata normal form. 8/6949 useless extension candidates. Maximal degree in co-relation 46690. Up to 4988 conditions per place. [2024-06-27 21:46:24,424 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 325 selfloop transitions, 93 changer transitions 0/423 dead transitions. [2024-06-27 21:46:24,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 423 transitions, 5249 flow [2024-06-27 21:46:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:46:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:46:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:46:24,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 21:46:24,426 INFO L175 Difference]: Start difference. First operand has 386 places, 386 transitions, 3936 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:46:24,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 423 transitions, 5249 flow [2024-06-27 21:46:30,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 423 transitions, 5042 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-27 21:46:30,581 INFO L231 Difference]: Finished difference. Result has 385 places, 386 transitions, 3919 flow [2024-06-27 21:46:30,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3729, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3919, PETRI_PLACES=385, PETRI_TRANSITIONS=386} [2024-06-27 21:46:30,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-27 21:46:30,581 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 386 transitions, 3919 flow [2024-06-27 21:46:30,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:30,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:30,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:46:30,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 21:46:30,582 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)] === [2024-06-27 21:46:30,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:30,582 INFO L85 PathProgramCache]: Analyzing trace with hash -632610891, now seen corresponding path program 1 times [2024-06-27 21:46:30,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:30,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336972833] [2024-06-27 21:46:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:30,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:33,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:33,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336972833] [2024-06-27 21:46:33,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336972833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:33,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:33,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:46:33,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577418042] [2024-06-27 21:46:33,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:33,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:46:33,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:33,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:46:33,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:46:33,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:46:33,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 386 transitions, 3919 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:33,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:33,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:46:33,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15