./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe020_power.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_power.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/safe020_power.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_power.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 04:21:01,831 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:21:01,897 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:21:01,902 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:21:01,903 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:21:01,929 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:21:01,929 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:21:01,929 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:21:01,930 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:21:01,936 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:21:01,936 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:21:01,936 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:21:01,937 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:21:01,937 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:21:01,937 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:21:01,937 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:21:01,937 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:21:01,937 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:21:01,938 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:21:01,938 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:21:01,938 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:21:01,938 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:21:01,938 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:21:01,939 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:21:01,939 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:21:01,939 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:21:01,939 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:21:01,939 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:21:01,940 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:21:01,940 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:21:01,940 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:21:01,941 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:21:01,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:21:01,941 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:21:01,941 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:21:01,941 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:21:01,941 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:21:01,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:21:01,941 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:21:01,941 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:21:01,942 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:21:01,942 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:21:01,942 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:21:01,942 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:21:02,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:21:02,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:21:02,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:21:02,161 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:21:02,162 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:21:02,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_power.yml/witness.yml [2024-06-28 04:21:02,359 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:21:02,359 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:21:02,360 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_power.i [2024-06-28 04:21:03,294 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:21:03,504 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:21:03,504 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_power.i [2024-06-28 04:21:03,516 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8508bd253/d073f12fe3a04327baec0f28a75aeb78/FLAG838f2dd2e [2024-06-28 04:21:03,530 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8508bd253/d073f12fe3a04327baec0f28a75aeb78 [2024-06-28 04:21:03,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:21:03,532 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:21:03,534 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:21:03,534 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:21:03,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:21:03,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:21:02" (1/2) ... [2024-06-28 04:21:03,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103128b8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:21:03, skipping insertion in model container [2024-06-28 04:21:03,539 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:21:02" (1/2) ... [2024-06-28 04:21:03,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3dc05b92 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:21:03, skipping insertion in model container [2024-06-28 04:21:03,541 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:21:03" (2/2) ... [2024-06-28 04:21:03,541 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103128b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:03, skipping insertion in model container [2024-06-28 04:21:03,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:21:03" (2/2) ... [2024-06-28 04:21:03,542 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:21:03,671 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:21:03,690 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] (((((((((((((((((((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-28 04:21:03,691 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] (((((((((((((((((((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__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)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! 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 || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-28 04:21:03,691 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-28 04:21:03,691 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:21:03,692 INFO L106 edCorrectnessWitness]: ghost_update [L860-L860] multithreaded = 1; [2024-06-28 04:21:03,737 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:21:04,135 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:21:04,147 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:21:04,291 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:21:04,321 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:21:04,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04 WrapperNode [2024-06-28 04:21:04,322 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:21:04,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:21:04,323 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:21:04,323 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:21:04,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,341 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,371 INFO L138 Inliner]: procedures = 175, calls = 90, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2024-06-28 04:21:04,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:21:04,372 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:21:04,372 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:21:04,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:21:04,381 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,392 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,409 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-28 04:21:04,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,409 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,421 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,423 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,425 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,426 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,430 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:21:04,432 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:21:04,432 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:21:04,433 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:21:04,433 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (1/1) ... [2024-06-28 04:21:04,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:21:04,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:21:04,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 04:21:04,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 04:21:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 04:21:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 04:21:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 04:21:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 04:21:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:21:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:21:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:21:04,508 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:21:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:21:04,508 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:21:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:21:04,508 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:21:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:21:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 04:21:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:21:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:21:04,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:21:04,510 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 04:21:04,622 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:21:04,625 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:21:05,117 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:21:05,117 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:21:05,508 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:21:05,508 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:21:05,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:21:05 BoogieIcfgContainer [2024-06-28 04:21:05,508 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:21:05,511 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:21:05,511 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:21:05,513 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:21:05,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:21:02" (1/4) ... [2024-06-28 04:21:05,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1842e0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:21:05, skipping insertion in model container [2024-06-28 04:21:05,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:21:03" (2/4) ... [2024-06-28 04:21:05,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1842e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:21:05, skipping insertion in model container [2024-06-28 04:21:05,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:21:04" (3/4) ... [2024-06-28 04:21:05,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1842e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:21:05, skipping insertion in model container [2024-06-28 04:21:05,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:21:05" (4/4) ... [2024-06-28 04:21:05,516 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_power.i [2024-06-28 04:21:05,529 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:21:05,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 04:21:05,530 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:21:05,588 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:21:05,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 04:21:05,647 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 04:21:05,647 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:21:05,649 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 58 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. [2024-06-28 04:21:05,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 04:21:05,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 04:21:05,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:21:05,671 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;@6f7f4be1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:21:05,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 04:21:05,676 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:21:05,676 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 04:21:05,676 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:21:05,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:05,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:21:05,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:05,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash 884604256, now seen corresponding path program 1 times [2024-06-28 04:21:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:05,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093646736] [2024-06-28 04:21:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:05,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:07,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:07,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093646736] [2024-06-28 04:21:07,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093646736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:07,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:07,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:21:07,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465657227] [2024-06-28 04:21:07,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:07,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:21:07,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:21:07,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:21:07,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:21:07,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:07,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:07,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:21:07,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:07,644 INFO L124 PetriNetUnfolderBase]: 1160/1782 cut-off events. [2024-06-28 04:21:07,644 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-28 04:21:07,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3607 conditions, 1782 events. 1160/1782 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8370 event pairs, 777 based on Foata normal form. 1/1752 useless extension candidates. Maximal degree in co-relation 3595. Up to 1748 conditions per place. [2024-06-28 04:21:07,656 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-28 04:21:07,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 183 flow [2024-06-28 04:21:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:21:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:21:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-28 04:21:07,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-28 04:21:07,668 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 69 transitions. [2024-06-28 04:21:07,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 183 flow [2024-06-28 04:21:07,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:21:07,675 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 04:21:07,677 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} [2024-06-28 04:21:07,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 04:21:07,680 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 04:21:07,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:07,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:07,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:07,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:21:07,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:07,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:07,682 INFO L85 PathProgramCache]: Analyzing trace with hash -298776865, now seen corresponding path program 1 times [2024-06-28 04:21:07,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:07,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710409247] [2024-06-28 04:21:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:07,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:08,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:08,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710409247] [2024-06-28 04:21:08,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710409247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:08,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:08,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 04:21:08,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948325365] [2024-06-28 04:21:08,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:08,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 04:21:08,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 04:21:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 04:21:08,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:21:08,944 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) [2024-06-28 04:21:08,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:08,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:21:08,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:09,340 INFO L124 PetriNetUnfolderBase]: 1148/1764 cut-off events. [2024-06-28 04:21:09,340 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-28 04:21:09,344 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 8281 event pairs, 521 based on Foata normal form. 6/1768 useless extension candidates. Maximal degree in co-relation 4046. Up to 1692 conditions per place. [2024-06-28 04:21:09,351 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-28 04:21:09,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-28 04:21:09,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:21:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:21:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-28 04:21:09,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 04:21:09,355 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-28 04:21:09,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-28 04:21:09,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:21:09,358 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 04:21:09,358 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} [2024-06-28 04:21:09,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 04:21:09,361 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 04:21:09,361 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) [2024-06-28 04:21:09,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:09,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:09,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:21:09,366 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:09,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:09,366 INFO L85 PathProgramCache]: Analyzing trace with hash -772733475, now seen corresponding path program 1 times [2024-06-28 04:21:09,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:09,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46468310] [2024-06-28 04:21:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:09,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:11,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:11,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46468310] [2024-06-28 04:21:11,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46468310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:11,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:11,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:21:11,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788074346] [2024-06-28 04:21:11,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:11,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:21:11,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:11,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:21:11,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:21:11,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:21:11,423 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) [2024-06-28 04:21:11,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:11,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:21:11,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:12,017 INFO L124 PetriNetUnfolderBase]: 1139/1749 cut-off events. [2024-06-28 04:21:12,017 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-28 04:21:12,021 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 84. Compared 8150 event pairs, 375 based on Foata normal form. 6/1753 useless extension candidates. Maximal degree in co-relation 4479. Up to 1639 conditions per place. [2024-06-28 04:21:12,027 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-28 04:21:12,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 380 flow [2024-06-28 04:21:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:21:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:21:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-28 04:21:12,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-28 04:21:12,030 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 127 transitions. [2024-06-28 04:21:12,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 380 flow [2024-06-28 04:21:12,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 04:21:12,032 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-28 04:21:12,033 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} [2024-06-28 04:21:12,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-28 04:21:12,033 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-28 04:21:12,034 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) [2024-06-28 04:21:12,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:12,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:12,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:21:12,034 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)] === [2024-06-28 04:21:12,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:12,035 INFO L85 PathProgramCache]: Analyzing trace with hash -952377265, now seen corresponding path program 1 times [2024-06-28 04:21:12,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:12,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170559586] [2024-06-28 04:21:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:12,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:13,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:13,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170559586] [2024-06-28 04:21:13,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170559586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:13,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:13,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:21:13,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963404949] [2024-06-28 04:21:13,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:13,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:21:13,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:13,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:21:13,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:21:13,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:13,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:13,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:13,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:13,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:13,815 INFO L124 PetriNetUnfolderBase]: 1134/1742 cut-off events. [2024-06-28 04:21:13,815 INFO L125 PetriNetUnfolderBase]: For 1858/1858 co-relation queries the response was YES. [2024-06-28 04:21:13,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4932 conditions, 1742 events. 1134/1742 cut-off events. For 1858/1858 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8098 event pairs, 464 based on Foata normal form. 2/1742 useless extension candidates. Maximal degree in co-relation 4915. Up to 1697 conditions per place. [2024-06-28 04:21:13,827 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-28 04:21:13,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 339 flow [2024-06-28 04:21:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:21:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:21:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-28 04:21:13,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-28 04:21:13,829 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 89 transitions. [2024-06-28 04:21:13,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 339 flow [2024-06-28 04:21:13,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 312 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:21:13,834 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-28 04:21:13,834 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} [2024-06-28 04:21:13,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-28 04:21:13,835 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-28 04:21:13,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:13,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:13,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:13,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:21:13,836 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:13,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:13,837 INFO L85 PathProgramCache]: Analyzing trace with hash 541077699, now seen corresponding path program 1 times [2024-06-28 04:21:13,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:13,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905657592] [2024-06-28 04:21:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:15,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:15,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905657592] [2024-06-28 04:21:15,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905657592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:15,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:15,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:21:15,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345177333] [2024-06-28 04:21:15,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:15,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:21:15,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:21:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:21:15,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:15,539 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) [2024-06-28 04:21:15,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:15,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:15,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:16,084 INFO L124 PetriNetUnfolderBase]: 1129/1735 cut-off events. [2024-06-28 04:21:16,084 INFO L125 PetriNetUnfolderBase]: For 2654/2654 co-relation queries the response was YES. [2024-06-28 04:21:16,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5294 conditions, 1735 events. 1129/1735 cut-off events. For 2654/2654 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8049 event pairs, 446 based on Foata normal form. 2/1735 useless extension candidates. Maximal degree in co-relation 5275. Up to 1679 conditions per place. [2024-06-28 04:21:16,094 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-28 04:21:16,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 388 flow [2024-06-28 04:21:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:21:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:21:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 04:21:16,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:21:16,095 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 105 transitions. [2024-06-28 04:21:16,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 388 flow [2024-06-28 04:21:16,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 368 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:21:16,098 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-28 04:21:16,098 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-28 04:21:16,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-28 04:21:16,099 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-28 04:21:16,099 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) [2024-06-28 04:21:16,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:16,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:16,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:21:16,100 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:16,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:16,100 INFO L85 PathProgramCache]: Analyzing trace with hash -413133810, now seen corresponding path program 1 times [2024-06-28 04:21:16,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:16,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944012617] [2024-06-28 04:21:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:16,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:17,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:17,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944012617] [2024-06-28 04:21:17,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944012617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:17,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:17,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:21:17,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888976688] [2024-06-28 04:21:17,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:17,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:21:17,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:17,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:21:17,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:21:17,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:17,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 232 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) [2024-06-28 04:21:17,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:17,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:17,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:18,278 INFO L124 PetriNetUnfolderBase]: 1155/1785 cut-off events. [2024-06-28 04:21:18,278 INFO L125 PetriNetUnfolderBase]: For 3767/3767 co-relation queries the response was YES. [2024-06-28 04:21:18,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5866 conditions, 1785 events. 1155/1785 cut-off events. For 3767/3767 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8335 event pairs, 428 based on Foata normal form. 4/1787 useless extension candidates. Maximal degree in co-relation 5846. Up to 1698 conditions per place. [2024-06-28 04:21:18,289 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-28 04:21:18,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 454 flow [2024-06-28 04:21:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:21:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:21:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 04:21:18,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 04:21:18,292 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 6 states and 110 transitions. [2024-06-28 04:21:18,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 454 flow [2024-06-28 04:21:18,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 424 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 04:21:18,297 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 258 flow [2024-06-28 04:21:18,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-28 04:21:18,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-28 04:21:18,300 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 258 flow [2024-06-28 04:21:18,300 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) [2024-06-28 04:21:18,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:18,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:18,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:21:18,300 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:18,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:18,301 INFO L85 PathProgramCache]: Analyzing trace with hash -412954320, now seen corresponding path program 2 times [2024-06-28 04:21:18,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:18,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727915536] [2024-06-28 04:21:18,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:18,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:19,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:19,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727915536] [2024-06-28 04:21:19,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727915536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:19,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:19,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:21:19,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893164167] [2024-06-28 04:21:19,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:19,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:21:19,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:19,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:21:19,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:21:19,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:19,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 258 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) [2024-06-28 04:21:19,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:19,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:19,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:20,302 INFO L124 PetriNetUnfolderBase]: 1163/1796 cut-off events. [2024-06-28 04:21:20,303 INFO L125 PetriNetUnfolderBase]: For 5165/5165 co-relation queries the response was YES. [2024-06-28 04:21:20,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6353 conditions, 1796 events. 1163/1796 cut-off events. For 5165/5165 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8460 event pairs, 437 based on Foata normal form. 4/1796 useless extension candidates. Maximal degree in co-relation 6332. Up to 1677 conditions per place. [2024-06-28 04:21:20,315 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-28 04:21:20,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 480 flow [2024-06-28 04:21:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:21:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:21:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-28 04:21:20,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-28 04:21:20,317 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 258 flow. Second operand 6 states and 109 transitions. [2024-06-28 04:21:20,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 480 flow [2024-06-28 04:21:20,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 448 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 04:21:20,321 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 298 flow [2024-06-28 04:21:20,322 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=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-28 04:21:20,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 04:21:20,322 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 298 flow [2024-06-28 04:21:20,323 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) [2024-06-28 04:21:20,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:20,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:20,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:21:20,323 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:20,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash -406458642, now seen corresponding path program 1 times [2024-06-28 04:21:20,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:20,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696096841] [2024-06-28 04:21:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:20,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:22,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:22,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696096841] [2024-06-28 04:21:22,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696096841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:22,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:22,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:21:22,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756765381] [2024-06-28 04:21:22,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:22,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:21:22,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:22,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:21:22,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:21:22,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:22,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 298 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) [2024-06-28 04:21:22,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:22,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:22,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:23,135 INFO L124 PetriNetUnfolderBase]: 1155/1791 cut-off events. [2024-06-28 04:21:23,136 INFO L125 PetriNetUnfolderBase]: For 6606/6606 co-relation queries the response was YES. [2024-06-28 04:21:23,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6715 conditions, 1791 events. 1155/1791 cut-off events. For 6606/6606 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8397 event pairs, 409 based on Foata normal form. 4/1793 useless extension candidates. Maximal degree in co-relation 6693. Up to 1695 conditions per place. [2024-06-28 04:21:23,145 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 64 selfloop transitions, 13 changer transitions 0/82 dead transitions. [2024-06-28 04:21:23,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 536 flow [2024-06-28 04:21:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:21:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:21:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:21:23,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 04:21:23,149 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 298 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:21:23,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 536 flow [2024-06-28 04:21:23,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 488 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 04:21:23,153 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 311 flow [2024-06-28 04:21:23,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-28 04:21:23,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-28 04:21:23,155 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 311 flow [2024-06-28 04:21:23,156 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) [2024-06-28 04:21:23,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:23,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:23,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:21:23,156 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:23,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:23,157 INFO L85 PathProgramCache]: Analyzing trace with hash 77755620, now seen corresponding path program 1 times [2024-06-28 04:21:23,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:23,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869519071] [2024-06-28 04:21:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:23,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:25,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:25,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869519071] [2024-06-28 04:21:25,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869519071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:25,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:25,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:21:25,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409292329] [2024-06-28 04:21:25,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:21:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:21:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:21:25,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:25,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 311 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) [2024-06-28 04:21:25,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:25,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:25,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:25,876 INFO L124 PetriNetUnfolderBase]: 1168/1810 cut-off events. [2024-06-28 04:21:25,876 INFO L125 PetriNetUnfolderBase]: For 7993/7993 co-relation queries the response was YES. [2024-06-28 04:21:25,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6999 conditions, 1810 events. 1168/1810 cut-off events. For 7993/7993 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8500 event pairs, 406 based on Foata normal form. 2/1810 useless extension candidates. Maximal degree in co-relation 6976. Up to 1717 conditions per place. [2024-06-28 04:21:25,889 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-06-28 04:21:25,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 561 flow [2024-06-28 04:21:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:21:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:21:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 04:21:25,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 04:21:25,891 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 311 flow. Second operand 6 states and 110 transitions. [2024-06-28 04:21:25,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 561 flow [2024-06-28 04:21:25,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 518 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 04:21:25,895 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 339 flow [2024-06-28 04:21:25,895 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-06-28 04:21:25,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-28 04:21:25,896 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 339 flow [2024-06-28 04:21:25,896 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) [2024-06-28 04:21:25,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:25,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:25,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:21:25,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:25,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash 284409060, now seen corresponding path program 2 times [2024-06-28 04:21:25,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:25,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470413244] [2024-06-28 04:21:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:25,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:27,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:27,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470413244] [2024-06-28 04:21:27,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470413244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:27,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:27,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:21:27,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591465168] [2024-06-28 04:21:27,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:27,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:21:27,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:27,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:21:27,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:21:27,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:27,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 339 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) [2024-06-28 04:21:27,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:27,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:27,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:28,246 INFO L124 PetriNetUnfolderBase]: 1194/1847 cut-off events. [2024-06-28 04:21:28,246 INFO L125 PetriNetUnfolderBase]: For 9893/9893 co-relation queries the response was YES. [2024-06-28 04:21:28,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7543 conditions, 1847 events. 1194/1847 cut-off events. For 9893/9893 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8688 event pairs, 415 based on Foata normal form. 4/1847 useless extension candidates. Maximal degree in co-relation 7519. Up to 1700 conditions per place. [2024-06-28 04:21:28,255 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 21 changer transitions 0/91 dead transitions. [2024-06-28 04:21:28,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 622 flow [2024-06-28 04:21:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:21:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:21:28,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 04:21:28,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:21:28,257 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 339 flow. Second operand 7 states and 126 transitions. [2024-06-28 04:21:28,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 622 flow [2024-06-28 04:21:28,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 582 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 04:21:28,263 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 401 flow [2024-06-28 04:21:28,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=401, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-28 04:21:28,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-28 04:21:28,265 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 401 flow [2024-06-28 04:21:28,265 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) [2024-06-28 04:21:28,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:28,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:28,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:21:28,265 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:28,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1141766562, now seen corresponding path program 3 times [2024-06-28 04:21:28,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:28,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793530281] [2024-06-28 04:21:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:30,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793530281] [2024-06-28 04:21:30,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793530281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:30,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:30,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:21:30,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316155265] [2024-06-28 04:21:30,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:30,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:21:30,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:30,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:21:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:21:30,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:30,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 401 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) [2024-06-28 04:21:30,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:30,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:30,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:30,877 INFO L124 PetriNetUnfolderBase]: 1207/1866 cut-off events. [2024-06-28 04:21:30,877 INFO L125 PetriNetUnfolderBase]: For 12289/12289 co-relation queries the response was YES. [2024-06-28 04:21:30,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8223 conditions, 1866 events. 1207/1866 cut-off events. For 12289/12289 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8789 event pairs, 415 based on Foata normal form. 2/1864 useless extension candidates. Maximal degree in co-relation 8198. Up to 1673 conditions per place. [2024-06-28 04:21:30,885 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 33 changer transitions 0/104 dead transitions. [2024-06-28 04:21:30,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 803 flow [2024-06-28 04:21:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:21:30,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 04:21:30,888 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 401 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:21:30,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 803 flow [2024-06-28 04:21:30,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 104 transitions, 734 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 04:21:30,895 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 514 flow [2024-06-28 04:21:30,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=514, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-28 04:21:30,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-28 04:21:30,896 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 514 flow [2024-06-28 04:21:30,896 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) [2024-06-28 04:21:30,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:30,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:30,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:21:30,897 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:30,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:30,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2007542959, now seen corresponding path program 1 times [2024-06-28 04:21:30,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:30,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173269334] [2024-06-28 04:21:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:30,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:32,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:32,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173269334] [2024-06-28 04:21:32,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173269334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:32,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:32,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:21:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143169295] [2024-06-28 04:21:32,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:32,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:21:32,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:32,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:21:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:21:32,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:32,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 514 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) [2024-06-28 04:21:32,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:32,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:32,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:33,418 INFO L124 PetriNetUnfolderBase]: 1265/1973 cut-off events. [2024-06-28 04:21:33,418 INFO L125 PetriNetUnfolderBase]: For 15246/15246 co-relation queries the response was YES. [2024-06-28 04:21:33,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9190 conditions, 1973 events. 1265/1973 cut-off events. For 15246/15246 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9427 event pairs, 406 based on Foata normal form. 2/1973 useless extension candidates. Maximal degree in co-relation 9163. Up to 1825 conditions per place. [2024-06-28 04:21:33,427 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 92 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2024-06-28 04:21:33,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 935 flow [2024-06-28 04:21:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:21:33,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 04:21:33,429 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 514 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:21:33,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 935 flow [2024-06-28 04:21:33,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 884 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 04:21:33,439 INFO L231 Difference]: Finished difference. Result has 76 places, 86 transitions, 648 flow [2024-06-28 04:21:33,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=648, PETRI_PLACES=76, PETRI_TRANSITIONS=86} [2024-06-28 04:21:33,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-28 04:21:33,440 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 86 transitions, 648 flow [2024-06-28 04:21:33,440 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) [2024-06-28 04:21:33,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:33,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:33,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:21:33,441 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)] === [2024-06-28 04:21:33,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash 798666993, now seen corresponding path program 2 times [2024-06-28 04:21:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:33,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349496598] [2024-06-28 04:21:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:35,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:35,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349496598] [2024-06-28 04:21:35,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349496598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:35,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:35,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:21:35,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175753987] [2024-06-28 04:21:35,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:35,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:21:35,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:35,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:21:35,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:21:35,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:35,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 86 transitions, 648 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) [2024-06-28 04:21:35,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:35,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:35,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:35,981 INFO L124 PetriNetUnfolderBase]: 1260/1966 cut-off events. [2024-06-28 04:21:35,981 INFO L125 PetriNetUnfolderBase]: For 17948/17948 co-relation queries the response was YES. [2024-06-28 04:21:35,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9694 conditions, 1966 events. 1260/1966 cut-off events. For 17948/17948 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9375 event pairs, 388 based on Foata normal form. 2/1966 useless extension candidates. Maximal degree in co-relation 9663. Up to 1801 conditions per place. [2024-06-28 04:21:35,991 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 90 selfloop transitions, 26 changer transitions 0/121 dead transitions. [2024-06-28 04:21:35,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 1026 flow [2024-06-28 04:21:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:21:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:21:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 04:21:35,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-28 04:21:35,995 INFO L175 Difference]: Start difference. First operand has 76 places, 86 transitions, 648 flow. Second operand 7 states and 129 transitions. [2024-06-28 04:21:35,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 1026 flow [2024-06-28 04:21:36,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 964 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 04:21:36,009 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 707 flow [2024-06-28 04:21:36,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=707, PETRI_PLACES=80, PETRI_TRANSITIONS=89} [2024-06-28 04:21:36,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-28 04:21:36,010 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 89 transitions, 707 flow [2024-06-28 04:21:36,011 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) [2024-06-28 04:21:36,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:36,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:36,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:21:36,011 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:36,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1884541203, now seen corresponding path program 1 times [2024-06-28 04:21:36,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:36,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066980817] [2024-06-28 04:21:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:36,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:37,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:37,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066980817] [2024-06-28 04:21:37,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066980817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:37,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:37,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:37,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820588520] [2024-06-28 04:21:37,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:37,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:37,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:37,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:37,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:37,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 89 transitions, 707 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) [2024-06-28 04:21:37,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:37,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:37,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:38,960 INFO L124 PetriNetUnfolderBase]: 1363/2139 cut-off events. [2024-06-28 04:21:38,960 INFO L125 PetriNetUnfolderBase]: For 24845/24845 co-relation queries the response was YES. [2024-06-28 04:21:38,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10957 conditions, 2139 events. 1363/2139 cut-off events. For 24845/24845 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10537 event pairs, 396 based on Foata normal form. 26/2163 useless extension candidates. Maximal degree in co-relation 10925. Up to 1825 conditions per place. [2024-06-28 04:21:38,971 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 102 selfloop transitions, 23 changer transitions 0/130 dead transitions. [2024-06-28 04:21:38,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 130 transitions, 1139 flow [2024-06-28 04:21:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:21:38,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 04:21:38,973 INFO L175 Difference]: Start difference. First operand has 80 places, 89 transitions, 707 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:21:38,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 130 transitions, 1139 flow [2024-06-28 04:21:38,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 130 transitions, 1014 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-28 04:21:38,992 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 695 flow [2024-06-28 04:21:38,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=695, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2024-06-28 04:21:38,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-28 04:21:38,993 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 695 flow [2024-06-28 04:21:38,993 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) [2024-06-28 04:21:38,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:38,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:38,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:21:38,994 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:38,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash 226748141, now seen corresponding path program 2 times [2024-06-28 04:21:38,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:38,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553024989] [2024-06-28 04:21:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:38,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:40,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:40,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553024989] [2024-06-28 04:21:40,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553024989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:40,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:40,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:40,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524300702] [2024-06-28 04:21:40,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:40,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:40,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:40,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:40,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 695 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) [2024-06-28 04:21:40,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:40,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:40,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:41,749 INFO L124 PetriNetUnfolderBase]: 1471/2314 cut-off events. [2024-06-28 04:21:41,750 INFO L125 PetriNetUnfolderBase]: For 28589/28589 co-relation queries the response was YES. [2024-06-28 04:21:41,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11872 conditions, 2314 events. 1471/2314 cut-off events. For 28589/28589 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11639 event pairs, 417 based on Foata normal form. 24/2332 useless extension candidates. Maximal degree in co-relation 11838. Up to 1972 conditions per place. [2024-06-28 04:21:41,760 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 99 selfloop transitions, 26 changer transitions 0/130 dead transitions. [2024-06-28 04:21:41,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 130 transitions, 1129 flow [2024-06-28 04:21:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:21:41,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 04:21:41,762 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 695 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:21:41,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 130 transitions, 1129 flow [2024-06-28 04:21:41,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 130 transitions, 1071 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:41,777 INFO L231 Difference]: Finished difference. Result has 86 places, 93 transitions, 742 flow [2024-06-28 04:21:41,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=742, PETRI_PLACES=86, PETRI_TRANSITIONS=93} [2024-06-28 04:21:41,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-28 04:21:41,778 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 742 flow [2024-06-28 04:21:41,778 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) [2024-06-28 04:21:41,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:41,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:41,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:21:41,779 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:41,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:41,779 INFO L85 PathProgramCache]: Analyzing trace with hash 235022351, now seen corresponding path program 3 times [2024-06-28 04:21:41,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:41,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535822070] [2024-06-28 04:21:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:41,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:43,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:43,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535822070] [2024-06-28 04:21:43,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535822070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:43,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:43,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:43,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264202749] [2024-06-28 04:21:43,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:43,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:43,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:43,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:43,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:43,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:43,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 93 transitions, 742 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) [2024-06-28 04:21:43,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:43,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:43,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:44,754 INFO L124 PetriNetUnfolderBase]: 1491/2352 cut-off events. [2024-06-28 04:21:44,755 INFO L125 PetriNetUnfolderBase]: For 29922/29922 co-relation queries the response was YES. [2024-06-28 04:21:44,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12340 conditions, 2352 events. 1491/2352 cut-off events. For 29922/29922 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11921 event pairs, 423 based on Foata normal form. 4/2350 useless extension candidates. Maximal degree in co-relation 12305. Up to 1938 conditions per place. [2024-06-28 04:21:44,765 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 40 changer transitions 0/137 dead transitions. [2024-06-28 04:21:44,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 1210 flow [2024-06-28 04:21:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:21:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:21:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 04:21:44,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 04:21:44,767 INFO L175 Difference]: Start difference. First operand has 86 places, 93 transitions, 742 flow. Second operand 9 states and 164 transitions. [2024-06-28 04:21:44,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 1210 flow [2024-06-28 04:21:44,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 137 transitions, 1149 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:44,786 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 821 flow [2024-06-28 04:21:44,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=821, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-28 04:21:44,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-28 04:21:44,786 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 821 flow [2024-06-28 04:21:44,787 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) [2024-06-28 04:21:44,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:44,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:44,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:21:44,787 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:44,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:44,787 INFO L85 PathProgramCache]: Analyzing trace with hash 235319021, now seen corresponding path program 4 times [2024-06-28 04:21:44,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:44,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730925266] [2024-06-28 04:21:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:44,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:46,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:46,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730925266] [2024-06-28 04:21:46,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730925266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:46,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:46,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:46,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143610071] [2024-06-28 04:21:46,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:46,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:46,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:46,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:46,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:46,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 821 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) [2024-06-28 04:21:46,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:46,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:46,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:47,486 INFO L124 PetriNetUnfolderBase]: 1483/2346 cut-off events. [2024-06-28 04:21:47,486 INFO L125 PetriNetUnfolderBase]: For 31946/31946 co-relation queries the response was YES. [2024-06-28 04:21:47,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12504 conditions, 2346 events. 1483/2346 cut-off events. For 31946/31946 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11915 event pairs, 385 based on Foata normal form. 4/2344 useless extension candidates. Maximal degree in co-relation 12468. Up to 1708 conditions per place. [2024-06-28 04:21:47,498 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 86 selfloop transitions, 44 changer transitions 0/135 dead transitions. [2024-06-28 04:21:47,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 135 transitions, 1279 flow [2024-06-28 04:21:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:47,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:21:47,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 04:21:47,501 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 821 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:21:47,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 135 transitions, 1279 flow [2024-06-28 04:21:47,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 135 transitions, 1179 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 04:21:47,522 INFO L231 Difference]: Finished difference. Result has 90 places, 97 transitions, 870 flow [2024-06-28 04:21:47,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=870, PETRI_PLACES=90, PETRI_TRANSITIONS=97} [2024-06-28 04:21:47,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-28 04:21:47,523 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 97 transitions, 870 flow [2024-06-28 04:21:47,523 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) [2024-06-28 04:21:47,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:47,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:47,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:21:47,524 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:47,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash 566421038, now seen corresponding path program 1 times [2024-06-28 04:21:47,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:47,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29372908] [2024-06-28 04:21:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:47,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:48,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:48,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29372908] [2024-06-28 04:21:48,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29372908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:48,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:48,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:21:48,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061852723] [2024-06-28 04:21:48,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:48,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:21:48,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:21:48,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:21:48,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:48,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 97 transitions, 870 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:48,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:48,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:48,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:49,636 INFO L124 PetriNetUnfolderBase]: 1480/2344 cut-off events. [2024-06-28 04:21:49,636 INFO L125 PetriNetUnfolderBase]: For 30600/30602 co-relation queries the response was YES. [2024-06-28 04:21:49,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12510 conditions, 2344 events. 1480/2344 cut-off events. For 30600/30602 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11895 event pairs, 423 based on Foata normal form. 1/2343 useless extension candidates. Maximal degree in co-relation 12473. Up to 2262 conditions per place. [2024-06-28 04:21:49,647 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 97 selfloop transitions, 8 changer transitions 0/110 dead transitions. [2024-06-28 04:21:49,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 110 transitions, 1128 flow [2024-06-28 04:21:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:21:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:21:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-28 04:21:49,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 04:21:49,648 INFO L175 Difference]: Start difference. First operand has 90 places, 97 transitions, 870 flow. Second operand 5 states and 84 transitions. [2024-06-28 04:21:49,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 110 transitions, 1128 flow [2024-06-28 04:21:49,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 110 transitions, 1003 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:49,674 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 793 flow [2024-06-28 04:21:49,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=793, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-28 04:21:49,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-28 04:21:49,675 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 793 flow [2024-06-28 04:21:49,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:49,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:49,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:49,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:21:49,675 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:49,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash 3459771, now seen corresponding path program 1 times [2024-06-28 04:21:49,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:49,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586241437] [2024-06-28 04:21:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:49,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:51,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:51,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586241437] [2024-06-28 04:21:51,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586241437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:51,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:51,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:51,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156225227] [2024-06-28 04:21:51,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:51,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:51,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:51,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:51,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:51,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:51,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 793 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) [2024-06-28 04:21:51,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:51,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:51,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:52,775 INFO L124 PetriNetUnfolderBase]: 1493/2372 cut-off events. [2024-06-28 04:21:52,775 INFO L125 PetriNetUnfolderBase]: For 31668/31668 co-relation queries the response was YES. [2024-06-28 04:21:52,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12624 conditions, 2372 events. 1493/2372 cut-off events. For 31668/31668 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12086 event pairs, 395 based on Foata normal form. 2/2372 useless extension candidates. Maximal degree in co-relation 12586. Up to 2172 conditions per place. [2024-06-28 04:21:52,787 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 106 selfloop transitions, 29 changer transitions 0/140 dead transitions. [2024-06-28 04:21:52,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 1229 flow [2024-06-28 04:21:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:21:52,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:21:52,789 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 793 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:21:52,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 1229 flow [2024-06-28 04:21:52,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 140 transitions, 1203 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 04:21:52,808 INFO L231 Difference]: Finished difference. Result has 94 places, 103 transitions, 896 flow [2024-06-28 04:21:52,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=896, PETRI_PLACES=94, PETRI_TRANSITIONS=103} [2024-06-28 04:21:52,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-28 04:21:52,809 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 103 transitions, 896 flow [2024-06-28 04:21:52,809 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) [2024-06-28 04:21:52,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:52,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:52,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:21:52,809 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:52,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:52,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1708758819, now seen corresponding path program 2 times [2024-06-28 04:21:52,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:52,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964949499] [2024-06-28 04:21:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:52,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:54,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:54,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964949499] [2024-06-28 04:21:54,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964949499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:54,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:54,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:54,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016697260] [2024-06-28 04:21:54,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:54,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:54,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:54,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:54,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 103 transitions, 896 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) [2024-06-28 04:21:54,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:54,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:54,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:55,733 INFO L124 PetriNetUnfolderBase]: 1506/2394 cut-off events. [2024-06-28 04:21:55,733 INFO L125 PetriNetUnfolderBase]: For 35934/35936 co-relation queries the response was YES. [2024-06-28 04:21:55,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13320 conditions, 2394 events. 1506/2394 cut-off events. For 35934/35936 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12223 event pairs, 401 based on Foata normal form. 2/2394 useless extension candidates. Maximal degree in co-relation 13281. Up to 2130 conditions per place. [2024-06-28 04:21:55,744 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 93 selfloop transitions, 40 changer transitions 0/138 dead transitions. [2024-06-28 04:21:55,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1314 flow [2024-06-28 04:21:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:21:55,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:21:55,745 INFO L175 Difference]: Start difference. First operand has 94 places, 103 transitions, 896 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:21:55,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1314 flow [2024-06-28 04:21:55,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1211 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:55,765 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 949 flow [2024-06-28 04:21:55,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=949, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2024-06-28 04:21:55,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-28 04:21:55,766 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 949 flow [2024-06-28 04:21:55,766 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) [2024-06-28 04:21:55,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:55,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:55,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:21:55,766 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)] === [2024-06-28 04:21:55,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:55,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1764557123, now seen corresponding path program 3 times [2024-06-28 04:21:55,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:55,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499834311] [2024-06-28 04:21:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:55,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:57,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:57,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499834311] [2024-06-28 04:21:57,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499834311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:57,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:57,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:57,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808829188] [2024-06-28 04:21:57,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:57,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:57,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:57,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:57,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:57,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:21:57,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 949 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) [2024-06-28 04:21:57,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:57,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:21:57,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:58,559 INFO L124 PetriNetUnfolderBase]: 1519/2409 cut-off events. [2024-06-28 04:21:58,559 INFO L125 PetriNetUnfolderBase]: For 40762/40762 co-relation queries the response was YES. [2024-06-28 04:21:58,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13883 conditions, 2409 events. 1519/2409 cut-off events. For 40762/40762 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12346 event pairs, 415 based on Foata normal form. 2/2400 useless extension candidates. Maximal degree in co-relation 13843. Up to 2133 conditions per place. [2024-06-28 04:21:58,571 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 40 changer transitions 0/139 dead transitions. [2024-06-28 04:21:58,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 139 transitions, 1383 flow [2024-06-28 04:21:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:21:58,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:21:58,574 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 949 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:21:58,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 139 transitions, 1383 flow [2024-06-28 04:21:58,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 139 transitions, 1251 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:58,596 INFO L231 Difference]: Finished difference. Result has 98 places, 109 transitions, 979 flow [2024-06-28 04:21:58,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=979, PETRI_PLACES=98, PETRI_TRANSITIONS=109} [2024-06-28 04:21:58,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-28 04:21:58,597 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 109 transitions, 979 flow [2024-06-28 04:21:58,597 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) [2024-06-28 04:21:58,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:58,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:58,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:21:58,597 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:21:58,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1304247743, now seen corresponding path program 4 times [2024-06-28 04:21:58,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:58,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326495037] [2024-06-28 04:21:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:58,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:00,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:00,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326495037] [2024-06-28 04:22:00,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326495037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:00,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:00,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:22:00,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472130530] [2024-06-28 04:22:00,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:00,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:22:00,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:00,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:22:00,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:22:00,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:00,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 109 transitions, 979 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) [2024-06-28 04:22:00,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:00,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:00,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:01,522 INFO L124 PetriNetUnfolderBase]: 1514/2402 cut-off events. [2024-06-28 04:22:01,522 INFO L125 PetriNetUnfolderBase]: For 44963/44963 co-relation queries the response was YES. [2024-06-28 04:22:01,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14134 conditions, 2402 events. 1514/2402 cut-off events. For 44963/44963 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12313 event pairs, 415 based on Foata normal form. 2/2393 useless extension candidates. Maximal degree in co-relation 14093. Up to 2043 conditions per place. [2024-06-28 04:22:01,562 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 79 selfloop transitions, 58 changer transitions 0/142 dead transitions. [2024-06-28 04:22:01,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 1425 flow [2024-06-28 04:22:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:22:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:22:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:22:01,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:22:01,564 INFO L175 Difference]: Start difference. First operand has 98 places, 109 transitions, 979 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:22:01,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 1425 flow [2024-06-28 04:22:01,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1287 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:01,586 INFO L231 Difference]: Finished difference. Result has 100 places, 112 transitions, 1045 flow [2024-06-28 04:22:01,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1045, PETRI_PLACES=100, PETRI_TRANSITIONS=112} [2024-06-28 04:22:01,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-28 04:22:01,587 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 112 transitions, 1045 flow [2024-06-28 04:22:01,587 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) [2024-06-28 04:22:01,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:01,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:01,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:22:01,587 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)] === [2024-06-28 04:22:01,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash 379185501, now seen corresponding path program 1 times [2024-06-28 04:22:01,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:01,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020561678] [2024-06-28 04:22:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:01,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:03,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:03,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020561678] [2024-06-28 04:22:03,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020561678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:03,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:03,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:22:03,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537776341] [2024-06-28 04:22:03,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:03,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:22:03,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:22:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:22:03,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:03,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 112 transitions, 1045 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) [2024-06-28 04:22:03,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:03,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:03,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:04,159 INFO L124 PetriNetUnfolderBase]: 1536/2442 cut-off events. [2024-06-28 04:22:04,159 INFO L125 PetriNetUnfolderBase]: For 49856/49856 co-relation queries the response was YES. [2024-06-28 04:22:04,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14683 conditions, 2442 events. 1536/2442 cut-off events. For 49856/49856 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12512 event pairs, 407 based on Foata normal form. 6/2437 useless extension candidates. Maximal degree in co-relation 14641. Up to 2206 conditions per place. [2024-06-28 04:22:04,171 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 104 selfloop transitions, 27 changer transitions 0/136 dead transitions. [2024-06-28 04:22:04,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1501 flow [2024-06-28 04:22:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:22:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:22:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 04:22:04,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 04:22:04,172 INFO L175 Difference]: Start difference. First operand has 100 places, 112 transitions, 1045 flow. Second operand 6 states and 106 transitions. [2024-06-28 04:22:04,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1501 flow [2024-06-28 04:22:04,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1310 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:04,199 INFO L231 Difference]: Finished difference. Result has 101 places, 120 transitions, 1023 flow [2024-06-28 04:22:04,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1023, PETRI_PLACES=101, PETRI_TRANSITIONS=120} [2024-06-28 04:22:04,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-28 04:22:04,199 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 120 transitions, 1023 flow [2024-06-28 04:22:04,199 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) [2024-06-28 04:22:04,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:04,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:04,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:22:04,200 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:04,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:04,200 INFO L85 PathProgramCache]: Analyzing trace with hash 414393540, now seen corresponding path program 1 times [2024-06-28 04:22:04,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:04,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959444159] [2024-06-28 04:22:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:04,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:06,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:06,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959444159] [2024-06-28 04:22:06,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959444159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:06,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:06,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:22:06,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061790417] [2024-06-28 04:22:06,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:06,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:22:06,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:06,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:22:06,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:22:06,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:06,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 120 transitions, 1023 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) [2024-06-28 04:22:06,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:06,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:06,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:07,183 INFO L124 PetriNetUnfolderBase]: 1605/2560 cut-off events. [2024-06-28 04:22:07,183 INFO L125 PetriNetUnfolderBase]: For 54015/54015 co-relation queries the response was YES. [2024-06-28 04:22:07,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15476 conditions, 2560 events. 1605/2560 cut-off events. For 54015/54015 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13363 event pairs, 354 based on Foata normal form. 4/2557 useless extension candidates. Maximal degree in co-relation 15432. Up to 2310 conditions per place. [2024-06-28 04:22:07,197 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 132 selfloop transitions, 35 changer transitions 0/172 dead transitions. [2024-06-28 04:22:07,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 172 transitions, 1634 flow [2024-06-28 04:22:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 04:22:07,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 04:22:07,201 INFO L175 Difference]: Start difference. First operand has 101 places, 120 transitions, 1023 flow. Second operand 9 states and 156 transitions. [2024-06-28 04:22:07,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 172 transitions, 1634 flow [2024-06-28 04:22:07,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 172 transitions, 1569 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 04:22:07,237 INFO L231 Difference]: Finished difference. Result has 112 places, 137 transitions, 1259 flow [2024-06-28 04:22:07,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1259, PETRI_PLACES=112, PETRI_TRANSITIONS=137} [2024-06-28 04:22:07,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-28 04:22:07,237 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 137 transitions, 1259 flow [2024-06-28 04:22:07,237 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) [2024-06-28 04:22:07,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:07,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:07,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:22:07,238 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:07,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:07,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1285363248, now seen corresponding path program 2 times [2024-06-28 04:22:07,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:07,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47157408] [2024-06-28 04:22:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:07,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:09,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:09,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47157408] [2024-06-28 04:22:09,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47157408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:09,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:09,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:22:09,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247042146] [2024-06-28 04:22:09,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:09,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:22:09,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:09,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:22:09,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:22:09,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:09,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 1259 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) [2024-06-28 04:22:09,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:09,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:09,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:10,249 INFO L124 PetriNetUnfolderBase]: 1625/2598 cut-off events. [2024-06-28 04:22:10,249 INFO L125 PetriNetUnfolderBase]: For 57531/57531 co-relation queries the response was YES. [2024-06-28 04:22:10,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16142 conditions, 2598 events. 1625/2598 cut-off events. For 57531/57531 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13626 event pairs, 367 based on Foata normal form. 4/2600 useless extension candidates. Maximal degree in co-relation 16092. Up to 2344 conditions per place. [2024-06-28 04:22:10,265 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 40 changer transitions 0/176 dead transitions. [2024-06-28 04:22:10,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 176 transitions, 1767 flow [2024-06-28 04:22:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:22:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:22:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:22:10,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:22:10,267 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 1259 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:22:10,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 176 transitions, 1767 flow [2024-06-28 04:22:10,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 176 transitions, 1694 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-28 04:22:10,310 INFO L231 Difference]: Finished difference. Result has 118 places, 139 transitions, 1332 flow [2024-06-28 04:22:10,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1332, PETRI_PLACES=118, PETRI_TRANSITIONS=139} [2024-06-28 04:22:10,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-28 04:22:10,310 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 139 transitions, 1332 flow [2024-06-28 04:22:10,310 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) [2024-06-28 04:22:10,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:10,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:10,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:22:10,311 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:10,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:10,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1144558316, now seen corresponding path program 1 times [2024-06-28 04:22:10,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:10,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660056774] [2024-06-28 04:22:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:10,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:12,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660056774] [2024-06-28 04:22:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660056774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:12,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:12,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100074037] [2024-06-28 04:22:12,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:12,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:12,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:12,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:12,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 139 transitions, 1332 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) [2024-06-28 04:22:12,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:12,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:12,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:14,038 INFO L124 PetriNetUnfolderBase]: 1693/2714 cut-off events. [2024-06-28 04:22:14,038 INFO L125 PetriNetUnfolderBase]: For 69659/69659 co-relation queries the response was YES. [2024-06-28 04:22:14,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17215 conditions, 2714 events. 1693/2714 cut-off events. For 69659/69659 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14372 event pairs, 375 based on Foata normal form. 16/2728 useless extension candidates. Maximal degree in co-relation 17163. Up to 2319 conditions per place. [2024-06-28 04:22:14,055 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 137 selfloop transitions, 43 changer transitions 0/185 dead transitions. [2024-06-28 04:22:14,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 185 transitions, 1906 flow [2024-06-28 04:22:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 04:22:14,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 04:22:14,057 INFO L175 Difference]: Start difference. First operand has 118 places, 139 transitions, 1332 flow. Second operand 9 states and 164 transitions. [2024-06-28 04:22:14,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 185 transitions, 1906 flow [2024-06-28 04:22:14,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 185 transitions, 1780 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:14,099 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1348 flow [2024-06-28 04:22:14,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1348, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2024-06-28 04:22:14,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-28 04:22:14,100 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1348 flow [2024-06-28 04:22:14,100 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) [2024-06-28 04:22:14,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:14,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:14,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:22:14,100 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:14,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:14,100 INFO L85 PathProgramCache]: Analyzing trace with hash 222718924, now seen corresponding path program 2 times [2024-06-28 04:22:14,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:14,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378431076] [2024-06-28 04:22:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:14,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:16,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:16,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378431076] [2024-06-28 04:22:16,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378431076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:16,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:16,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:16,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023989195] [2024-06-28 04:22:16,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:16,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:16,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:16,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:16,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:16,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:16,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1348 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) [2024-06-28 04:22:16,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:16,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:16,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:17,525 INFO L124 PetriNetUnfolderBase]: 1761/2837 cut-off events. [2024-06-28 04:22:17,525 INFO L125 PetriNetUnfolderBase]: For 76588/76590 co-relation queries the response was YES. [2024-06-28 04:22:17,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18141 conditions, 2837 events. 1761/2837 cut-off events. For 76588/76590 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15257 event pairs, 405 based on Foata normal form. 16/2851 useless extension candidates. Maximal degree in co-relation 18088. Up to 2410 conditions per place. [2024-06-28 04:22:17,543 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 125 selfloop transitions, 51 changer transitions 0/181 dead transitions. [2024-06-28 04:22:17,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 181 transitions, 1892 flow [2024-06-28 04:22:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 04:22:17,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:22:17,544 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1348 flow. Second operand 9 states and 162 transitions. [2024-06-28 04:22:17,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 181 transitions, 1892 flow [2024-06-28 04:22:17,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1796 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 04:22:17,594 INFO L231 Difference]: Finished difference. Result has 123 places, 141 transitions, 1409 flow [2024-06-28 04:22:17,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1409, PETRI_PLACES=123, PETRI_TRANSITIONS=141} [2024-06-28 04:22:17,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-28 04:22:17,594 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 141 transitions, 1409 flow [2024-06-28 04:22:17,594 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) [2024-06-28 04:22:17,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:17,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:17,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:22:17,595 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:17,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash 394851318, now seen corresponding path program 3 times [2024-06-28 04:22:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:17,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322987510] [2024-06-28 04:22:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:17,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:19,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322987510] [2024-06-28 04:22:19,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322987510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:19,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:19,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:19,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648233749] [2024-06-28 04:22:19,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:19,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:19,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:19,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:19,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:19,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 141 transitions, 1409 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) [2024-06-28 04:22:19,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:19,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:19,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:20,946 INFO L124 PetriNetUnfolderBase]: 1905/3101 cut-off events. [2024-06-28 04:22:20,946 INFO L125 PetriNetUnfolderBase]: For 83366/83368 co-relation queries the response was YES. [2024-06-28 04:22:20,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19722 conditions, 3101 events. 1905/3101 cut-off events. For 83366/83368 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17179 event pairs, 437 based on Foata normal form. 12/3111 useless extension candidates. Maximal degree in co-relation 19668. Up to 2332 conditions per place. [2024-06-28 04:22:20,963 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 54 changer transitions 0/187 dead transitions. [2024-06-28 04:22:20,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 187 transitions, 2047 flow [2024-06-28 04:22:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 04:22:20,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 04:22:20,965 INFO L175 Difference]: Start difference. First operand has 123 places, 141 transitions, 1409 flow. Second operand 9 states and 164 transitions. [2024-06-28 04:22:20,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 187 transitions, 2047 flow [2024-06-28 04:22:21,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 187 transitions, 1928 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 04:22:21,014 INFO L231 Difference]: Finished difference. Result has 126 places, 144 transitions, 1521 flow [2024-06-28 04:22:21,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1521, PETRI_PLACES=126, PETRI_TRANSITIONS=144} [2024-06-28 04:22:21,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-28 04:22:21,014 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 144 transitions, 1521 flow [2024-06-28 04:22:21,015 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) [2024-06-28 04:22:21,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:21,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:21,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:22:21,015 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)] === [2024-06-28 04:22:21,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:21,015 INFO L85 PathProgramCache]: Analyzing trace with hash 557469015, now seen corresponding path program 1 times [2024-06-28 04:22:21,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:21,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592717867] [2024-06-28 04:22:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:21,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:22,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:22,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592717867] [2024-06-28 04:22:22,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592717867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:22,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:22,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:22:22,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682717516] [2024-06-28 04:22:22,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:22,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:22:22,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:22:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:22:22,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:22,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 144 transitions, 1521 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) [2024-06-28 04:22:22,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:22,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:22,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:23,610 INFO L124 PetriNetUnfolderBase]: 1915/3125 cut-off events. [2024-06-28 04:22:23,611 INFO L125 PetriNetUnfolderBase]: For 83541/83543 co-relation queries the response was YES. [2024-06-28 04:22:23,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20016 conditions, 3125 events. 1915/3125 cut-off events. For 83541/83543 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17474 event pairs, 460 based on Foata normal form. 2/3125 useless extension candidates. Maximal degree in co-relation 19960. Up to 2818 conditions per place. [2024-06-28 04:22:23,630 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 125 selfloop transitions, 40 changer transitions 0/170 dead transitions. [2024-06-28 04:22:23,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 170 transitions, 2049 flow [2024-06-28 04:22:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:22:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:22:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-28 04:22:23,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-28 04:22:23,631 INFO L175 Difference]: Start difference. First operand has 126 places, 144 transitions, 1521 flow. Second operand 6 states and 115 transitions. [2024-06-28 04:22:23,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 170 transitions, 2049 flow [2024-06-28 04:22:23,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 170 transitions, 1922 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:23,701 INFO L231 Difference]: Finished difference. Result has 126 places, 147 transitions, 1531 flow [2024-06-28 04:22:23,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1531, PETRI_PLACES=126, PETRI_TRANSITIONS=147} [2024-06-28 04:22:23,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-28 04:22:23,702 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 147 transitions, 1531 flow [2024-06-28 04:22:23,702 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) [2024-06-28 04:22:23,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:23,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:23,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:22:23,702 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:23,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash -308785394, now seen corresponding path program 4 times [2024-06-28 04:22:23,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:23,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724708854] [2024-06-28 04:22:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:23,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:26,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724708854] [2024-06-28 04:22:26,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724708854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:26,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:26,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:26,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732033131] [2024-06-28 04:22:26,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:26,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:26,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:26,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:26,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:26,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:26,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 147 transitions, 1531 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) [2024-06-28 04:22:26,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:26,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:26,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:27,283 INFO L124 PetriNetUnfolderBase]: 2107/3451 cut-off events. [2024-06-28 04:22:27,283 INFO L125 PetriNetUnfolderBase]: For 101250/101250 co-relation queries the response was YES. [2024-06-28 04:22:27,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22584 conditions, 3451 events. 2107/3451 cut-off events. For 101250/101250 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19836 event pairs, 520 based on Foata normal form. 12/3453 useless extension candidates. Maximal degree in co-relation 22527. Up to 2734 conditions per place. [2024-06-28 04:22:27,303 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 136 selfloop transitions, 52 changer transitions 0/193 dead transitions. [2024-06-28 04:22:27,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 193 transitions, 2323 flow [2024-06-28 04:22:27,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 04:22:27,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 04:22:27,305 INFO L175 Difference]: Start difference. First operand has 126 places, 147 transitions, 1531 flow. Second operand 9 states and 165 transitions. [2024-06-28 04:22:27,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 193 transitions, 2323 flow [2024-06-28 04:22:27,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 193 transitions, 2258 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 04:22:27,379 INFO L231 Difference]: Finished difference. Result has 133 places, 150 transitions, 1711 flow [2024-06-28 04:22:27,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1711, PETRI_PLACES=133, PETRI_TRANSITIONS=150} [2024-06-28 04:22:27,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-28 04:22:27,380 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 150 transitions, 1711 flow [2024-06-28 04:22:27,380 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) [2024-06-28 04:22:27,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:27,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:27,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:22:27,381 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:27,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:27,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1138553714, now seen corresponding path program 5 times [2024-06-28 04:22:27,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:27,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717447536] [2024-06-28 04:22:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:27,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:29,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717447536] [2024-06-28 04:22:29,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717447536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:29,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:29,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:29,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995917063] [2024-06-28 04:22:29,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:29,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:29,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:29,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:29,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:29,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 150 transitions, 1711 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) [2024-06-28 04:22:29,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:29,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:29,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:30,950 INFO L124 PetriNetUnfolderBase]: 2079/3407 cut-off events. [2024-06-28 04:22:30,950 INFO L125 PetriNetUnfolderBase]: For 103961/103961 co-relation queries the response was YES. [2024-06-28 04:22:30,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22137 conditions, 3407 events. 2079/3407 cut-off events. For 103961/103961 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19650 event pairs, 522 based on Foata normal form. 16/3413 useless extension candidates. Maximal degree in co-relation 22078. Up to 2944 conditions per place. [2024-06-28 04:22:30,973 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 133 selfloop transitions, 50 changer transitions 0/188 dead transitions. [2024-06-28 04:22:30,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 188 transitions, 2231 flow [2024-06-28 04:22:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 04:22:30,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 04:22:30,974 INFO L175 Difference]: Start difference. First operand has 133 places, 150 transitions, 1711 flow. Second operand 9 states and 161 transitions. [2024-06-28 04:22:30,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 188 transitions, 2231 flow [2024-06-28 04:22:31,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 188 transitions, 2117 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 04:22:31,069 INFO L231 Difference]: Finished difference. Result has 137 places, 150 transitions, 1704 flow [2024-06-28 04:22:31,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1704, PETRI_PLACES=137, PETRI_TRANSITIONS=150} [2024-06-28 04:22:31,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-28 04:22:31,069 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 150 transitions, 1704 flow [2024-06-28 04:22:31,069 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) [2024-06-28 04:22:31,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:31,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:31,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:22:31,070 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:31,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1771483794, now seen corresponding path program 6 times [2024-06-28 04:22:31,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:31,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399129883] [2024-06-28 04:22:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:31,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:33,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:33,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399129883] [2024-06-28 04:22:33,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399129883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:33,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:33,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508149376] [2024-06-28 04:22:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:33,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:33,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:33,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:33,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:33,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 150 transitions, 1704 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) [2024-06-28 04:22:33,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:33,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:33,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:34,469 INFO L124 PetriNetUnfolderBase]: 2223/3663 cut-off events. [2024-06-28 04:22:34,469 INFO L125 PetriNetUnfolderBase]: For 116309/116309 co-relation queries the response was YES. [2024-06-28 04:22:34,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24433 conditions, 3663 events. 2223/3663 cut-off events. For 116309/116309 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21655 event pairs, 550 based on Foata normal form. 12/3665 useless extension candidates. Maximal degree in co-relation 24372. Up to 2963 conditions per place. [2024-06-28 04:22:34,492 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 120 selfloop transitions, 70 changer transitions 0/195 dead transitions. [2024-06-28 04:22:34,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 195 transitions, 2488 flow [2024-06-28 04:22:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 04:22:34,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 04:22:34,494 INFO L175 Difference]: Start difference. First operand has 137 places, 150 transitions, 1704 flow. Second operand 9 states and 166 transitions. [2024-06-28 04:22:34,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 195 transitions, 2488 flow [2024-06-28 04:22:34,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 195 transitions, 2389 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 04:22:34,592 INFO L231 Difference]: Finished difference. Result has 139 places, 152 transitions, 1857 flow [2024-06-28 04:22:34,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1857, PETRI_PLACES=139, PETRI_TRANSITIONS=152} [2024-06-28 04:22:34,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-28 04:22:34,592 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 152 transitions, 1857 flow [2024-06-28 04:22:34,592 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) [2024-06-28 04:22:34,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:34,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:34,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:22:34,593 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:34,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1776972496, now seen corresponding path program 7 times [2024-06-28 04:22:34,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:34,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406037966] [2024-06-28 04:22:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:37,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:37,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406037966] [2024-06-28 04:22:37,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406037966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:37,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:37,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:37,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504555176] [2024-06-28 04:22:37,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:37,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:37,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:37,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:37,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:37,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:37,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 152 transitions, 1857 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) [2024-06-28 04:22:37,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:37,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:37,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:38,785 INFO L124 PetriNetUnfolderBase]: 2195/3628 cut-off events. [2024-06-28 04:22:38,785 INFO L125 PetriNetUnfolderBase]: For 117850/117850 co-relation queries the response was YES. [2024-06-28 04:22:38,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23905 conditions, 3628 events. 2195/3628 cut-off events. For 117850/117850 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21454 event pairs, 529 based on Foata normal form. 16/3639 useless extension candidates. Maximal degree in co-relation 23843. Up to 3031 conditions per place. [2024-06-28 04:22:38,810 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 146 selfloop transitions, 55 changer transitions 0/206 dead transitions. [2024-06-28 04:22:38,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 206 transitions, 2514 flow [2024-06-28 04:22:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:22:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:22:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-28 04:22:38,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-28 04:22:38,811 INFO L175 Difference]: Start difference. First operand has 139 places, 152 transitions, 1857 flow. Second operand 11 states and 194 transitions. [2024-06-28 04:22:38,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 206 transitions, 2514 flow [2024-06-28 04:22:38,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 206 transitions, 2360 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:38,900 INFO L231 Difference]: Finished difference. Result has 145 places, 157 transitions, 1909 flow [2024-06-28 04:22:38,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1909, PETRI_PLACES=145, PETRI_TRANSITIONS=157} [2024-06-28 04:22:38,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-28 04:22:38,901 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 157 transitions, 1909 flow [2024-06-28 04:22:38,901 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) [2024-06-28 04:22:38,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:38,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:38,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:22:38,901 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:38,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:38,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2086062246, now seen corresponding path program 8 times [2024-06-28 04:22:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:38,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192411141] [2024-06-28 04:22:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:38,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:41,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192411141] [2024-06-28 04:22:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192411141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:41,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:41,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:41,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909763316] [2024-06-28 04:22:41,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:41,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:41,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:41,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:41,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 157 transitions, 1909 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) [2024-06-28 04:22:41,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:41,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:41,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:42,589 INFO L124 PetriNetUnfolderBase]: 2215/3668 cut-off events. [2024-06-28 04:22:42,590 INFO L125 PetriNetUnfolderBase]: For 115749/115749 co-relation queries the response was YES. [2024-06-28 04:22:42,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24127 conditions, 3668 events. 2215/3668 cut-off events. For 115749/115749 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21645 event pairs, 491 based on Foata normal form. 12/3675 useless extension candidates. Maximal degree in co-relation 24063. Up to 2093 conditions per place. [2024-06-28 04:22:42,661 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 134 selfloop transitions, 63 changer transitions 0/202 dead transitions. [2024-06-28 04:22:42,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 202 transitions, 2557 flow [2024-06-28 04:22:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 04:22:42,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 04:22:42,662 INFO L175 Difference]: Start difference. First operand has 145 places, 157 transitions, 1909 flow. Second operand 9 states and 164 transitions. [2024-06-28 04:22:42,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 202 transitions, 2557 flow [2024-06-28 04:22:42,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 202 transitions, 2429 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-28 04:22:42,764 INFO L231 Difference]: Finished difference. Result has 145 places, 158 transitions, 1969 flow [2024-06-28 04:22:42,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1969, PETRI_PLACES=145, PETRI_TRANSITIONS=158} [2024-06-28 04:22:42,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-28 04:22:42,765 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 158 transitions, 1969 flow [2024-06-28 04:22:42,765 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) [2024-06-28 04:22:42,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:42,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:42,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:22:42,765 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)] === [2024-06-28 04:22:42,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:42,765 INFO L85 PathProgramCache]: Analyzing trace with hash -769989517, now seen corresponding path program 2 times [2024-06-28 04:22:42,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:42,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193090887] [2024-06-28 04:22:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:42,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:44,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:44,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193090887] [2024-06-28 04:22:44,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193090887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:44,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:44,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:22:44,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920854366] [2024-06-28 04:22:44,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:44,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:22:44,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:22:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:22:44,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:44,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 158 transitions, 1969 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) [2024-06-28 04:22:44,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:44,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:44,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:45,656 INFO L124 PetriNetUnfolderBase]: 2189/3627 cut-off events. [2024-06-28 04:22:45,657 INFO L125 PetriNetUnfolderBase]: For 113148/113148 co-relation queries the response was YES. [2024-06-28 04:22:45,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23821 conditions, 3627 events. 2189/3627 cut-off events. For 113148/113148 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21514 event pairs, 551 based on Foata normal form. 6/3623 useless extension candidates. Maximal degree in co-relation 23757. Up to 3323 conditions per place. [2024-06-28 04:22:45,678 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 129 selfloop transitions, 38 changer transitions 0/172 dead transitions. [2024-06-28 04:22:45,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 172 transitions, 2369 flow [2024-06-28 04:22:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:22:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:22:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 04:22:45,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:22:45,679 INFO L175 Difference]: Start difference. First operand has 145 places, 158 transitions, 1969 flow. Second operand 6 states and 105 transitions. [2024-06-28 04:22:45,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 172 transitions, 2369 flow [2024-06-28 04:22:45,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 2183 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-28 04:22:45,795 INFO L231 Difference]: Finished difference. Result has 144 places, 158 transitions, 1867 flow [2024-06-28 04:22:45,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1867, PETRI_PLACES=144, PETRI_TRANSITIONS=158} [2024-06-28 04:22:45,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-28 04:22:45,796 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 158 transitions, 1867 flow [2024-06-28 04:22:45,796 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) [2024-06-28 04:22:45,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:45,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:45,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:22:45,796 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:45,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:45,797 INFO L85 PathProgramCache]: Analyzing trace with hash 499695058, now seen corresponding path program 3 times [2024-06-28 04:22:45,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:45,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90900143] [2024-06-28 04:22:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:45,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:47,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:47,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90900143] [2024-06-28 04:22:47,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90900143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:47,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:47,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:22:47,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310491098] [2024-06-28 04:22:47,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:47,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:22:47,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:22:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:22:47,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:47,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 158 transitions, 1867 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) [2024-06-28 04:22:47,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:47,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:47,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:48,602 INFO L124 PetriNetUnfolderBase]: 2268/3764 cut-off events. [2024-06-28 04:22:48,602 INFO L125 PetriNetUnfolderBase]: For 112321/112321 co-relation queries the response was YES. [2024-06-28 04:22:48,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24044 conditions, 3764 events. 2268/3764 cut-off events. For 112321/112321 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22519 event pairs, 531 based on Foata normal form. 4/3766 useless extension candidates. Maximal degree in co-relation 23979. Up to 3424 conditions per place. [2024-06-28 04:22:48,626 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 165 selfloop transitions, 46 changer transitions 0/216 dead transitions. [2024-06-28 04:22:48,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 216 transitions, 2581 flow [2024-06-28 04:22:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 04:22:48,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 04:22:48,627 INFO L175 Difference]: Start difference. First operand has 144 places, 158 transitions, 1867 flow. Second operand 9 states and 165 transitions. [2024-06-28 04:22:48,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 216 transitions, 2581 flow [2024-06-28 04:22:48,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 216 transitions, 2452 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:48,725 INFO L231 Difference]: Finished difference. Result has 149 places, 172 transitions, 2058 flow [2024-06-28 04:22:48,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2058, PETRI_PLACES=149, PETRI_TRANSITIONS=172} [2024-06-28 04:22:48,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-28 04:22:48,725 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 172 transitions, 2058 flow [2024-06-28 04:22:48,726 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) [2024-06-28 04:22:48,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:48,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:48,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:22:48,726 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:48,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:48,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1965761036, now seen corresponding path program 4 times [2024-06-28 04:22:48,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:48,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243574113] [2024-06-28 04:22:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:48,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:50,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:50,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243574113] [2024-06-28 04:22:50,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243574113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:50,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:50,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:22:50,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562691253] [2024-06-28 04:22:50,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:50,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:22:50,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:50,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:22:50,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:22:50,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:50,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 172 transitions, 2058 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) [2024-06-28 04:22:50,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:50,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:50,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:51,678 INFO L124 PetriNetUnfolderBase]: 2366/3934 cut-off events. [2024-06-28 04:22:51,678 INFO L125 PetriNetUnfolderBase]: For 121559/121559 co-relation queries the response was YES. [2024-06-28 04:22:51,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25522 conditions, 3934 events. 2366/3934 cut-off events. For 121559/121559 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 23877 event pairs, 595 based on Foata normal form. 4/3936 useless extension candidates. Maximal degree in co-relation 25454. Up to 3583 conditions per place. [2024-06-28 04:22:51,704 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 39 changer transitions 0/226 dead transitions. [2024-06-28 04:22:51,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 226 transitions, 2841 flow [2024-06-28 04:22:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 04:22:51,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 04:22:51,706 INFO L175 Difference]: Start difference. First operand has 149 places, 172 transitions, 2058 flow. Second operand 9 states and 163 transitions. [2024-06-28 04:22:51,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 226 transitions, 2841 flow [2024-06-28 04:22:51,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 226 transitions, 2637 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-28 04:22:51,858 INFO L231 Difference]: Finished difference. Result has 154 places, 184 transitions, 2197 flow [2024-06-28 04:22:51,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2197, PETRI_PLACES=154, PETRI_TRANSITIONS=184} [2024-06-28 04:22:51,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-28 04:22:51,859 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 184 transitions, 2197 flow [2024-06-28 04:22:51,859 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) [2024-06-28 04:22:51,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:51,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:51,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:22:51,859 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:22:51,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:51,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1702829742, now seen corresponding path program 5 times [2024-06-28 04:22:51,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:51,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408867096] [2024-06-28 04:22:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:51,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:53,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:53,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408867096] [2024-06-28 04:22:53,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408867096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:53,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:53,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:22:53,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134139699] [2024-06-28 04:22:53,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:53,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:22:53,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:22:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:22:53,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:53,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 184 transitions, 2197 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) [2024-06-28 04:22:53,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:53,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:53,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:54,454 INFO L124 PetriNetUnfolderBase]: 2442/4058 cut-off events. [2024-06-28 04:22:54,454 INFO L125 PetriNetUnfolderBase]: For 123513/123513 co-relation queries the response was YES. [2024-06-28 04:22:54,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26103 conditions, 4058 events. 2442/4058 cut-off events. For 123513/123513 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24637 event pairs, 418 based on Foata normal form. 4/4060 useless extension candidates. Maximal degree in co-relation 26033. Up to 3522 conditions per place. [2024-06-28 04:22:54,481 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 172 selfloop transitions, 65 changer transitions 0/242 dead transitions. [2024-06-28 04:22:54,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 242 transitions, 3064 flow [2024-06-28 04:22:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 04:22:54,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 04:22:54,482 INFO L175 Difference]: Start difference. First operand has 154 places, 184 transitions, 2197 flow. Second operand 9 states and 163 transitions. [2024-06-28 04:22:54,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 242 transitions, 3064 flow [2024-06-28 04:22:54,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 242 transitions, 2853 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:54,643 INFO L231 Difference]: Finished difference. Result has 158 places, 199 transitions, 2438 flow [2024-06-28 04:22:54,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2438, PETRI_PLACES=158, PETRI_TRANSITIONS=199} [2024-06-28 04:22:54,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-28 04:22:54,643 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 199 transitions, 2438 flow [2024-06-28 04:22:54,643 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) [2024-06-28 04:22:54,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:54,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:54,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:22:54,644 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)] === [2024-06-28 04:22:54,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:54,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1832953293, now seen corresponding path program 1 times [2024-06-28 04:22:54,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:54,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279842448] [2024-06-28 04:22:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:54,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:56,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:56,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279842448] [2024-06-28 04:22:56,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279842448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:56,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:56,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:22:56,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434416899] [2024-06-28 04:22:56,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:56,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:22:56,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:56,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:22:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:22:56,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:56,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 199 transitions, 2438 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) [2024-06-28 04:22:56,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:56,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:56,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:57,510 INFO L124 PetriNetUnfolderBase]: 2447/4068 cut-off events. [2024-06-28 04:22:57,511 INFO L125 PetriNetUnfolderBase]: For 126113/126113 co-relation queries the response was YES. [2024-06-28 04:22:57,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26520 conditions, 4068 events. 2447/4068 cut-off events. For 126113/126113 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24934 event pairs, 705 based on Foata normal form. 1/4067 useless extension candidates. Maximal degree in co-relation 26449. Up to 3872 conditions per place. [2024-06-28 04:22:57,540 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 199 selfloop transitions, 12 changer transitions 0/216 dead transitions. [2024-06-28 04:22:57,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 216 transitions, 2948 flow [2024-06-28 04:22:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:22:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:22:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-28 04:22:57,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 04:22:57,541 INFO L175 Difference]: Start difference. First operand has 158 places, 199 transitions, 2438 flow. Second operand 6 states and 100 transitions. [2024-06-28 04:22:57,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 216 transitions, 2948 flow [2024-06-28 04:22:57,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 216 transitions, 2757 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-28 04:22:57,694 INFO L231 Difference]: Finished difference. Result has 157 places, 202 transitions, 2325 flow [2024-06-28 04:22:57,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2247, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2325, PETRI_PLACES=157, PETRI_TRANSITIONS=202} [2024-06-28 04:22:57,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-28 04:22:57,696 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 202 transitions, 2325 flow [2024-06-28 04:22:57,696 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) [2024-06-28 04:22:57,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:57,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:57,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:22:57,696 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)] === [2024-06-28 04:22:57,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1833073263, now seen corresponding path program 2 times [2024-06-28 04:22:57,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:57,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775081286] [2024-06-28 04:22:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:57,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:59,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:59,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775081286] [2024-06-28 04:22:59,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775081286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:59,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:59,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:22:59,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919089998] [2024-06-28 04:22:59,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:59,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:22:59,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:59,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:22:59,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:22:59,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:22:59,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 202 transitions, 2325 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) [2024-06-28 04:22:59,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:59,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:22:59,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:00,315 INFO L124 PetriNetUnfolderBase]: 2444/4064 cut-off events. [2024-06-28 04:23:00,315 INFO L125 PetriNetUnfolderBase]: For 126185/126185 co-relation queries the response was YES. [2024-06-28 04:23:00,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26348 conditions, 4064 events. 2444/4064 cut-off events. For 126185/126185 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24972 event pairs, 705 based on Foata normal form. 1/4063 useless extension candidates. Maximal degree in co-relation 26277. Up to 3876 conditions per place. [2024-06-28 04:23:00,344 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 198 selfloop transitions, 12 changer transitions 0/215 dead transitions. [2024-06-28 04:23:00,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 215 transitions, 2823 flow [2024-06-28 04:23:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:23:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:23:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-28 04:23:00,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:23:00,346 INFO L175 Difference]: Start difference. First operand has 157 places, 202 transitions, 2325 flow. Second operand 6 states and 96 transitions. [2024-06-28 04:23:00,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 215 transitions, 2823 flow [2024-06-28 04:23:00,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 215 transitions, 2767 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 04:23:00,471 INFO L231 Difference]: Finished difference. Result has 159 places, 205 transitions, 2353 flow [2024-06-28 04:23:00,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2353, PETRI_PLACES=159, PETRI_TRANSITIONS=205} [2024-06-28 04:23:00,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-28 04:23:00,472 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 205 transitions, 2353 flow [2024-06-28 04:23:00,472 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) [2024-06-28 04:23:00,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:00,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:00,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:23:00,472 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:00,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:00,472 INFO L85 PathProgramCache]: Analyzing trace with hash 239852898, now seen corresponding path program 1 times [2024-06-28 04:23:00,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:00,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814062550] [2024-06-28 04:23:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:00,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:02,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:02,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814062550] [2024-06-28 04:23:02,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814062550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:02,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:02,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:02,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648671040] [2024-06-28 04:23:02,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:02,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:02,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:02,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:02,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:02,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:02,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 205 transitions, 2353 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) [2024-06-28 04:23:02,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:02,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:02,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:04,290 INFO L124 PetriNetUnfolderBase]: 2424/4023 cut-off events. [2024-06-28 04:23:04,290 INFO L125 PetriNetUnfolderBase]: For 130890/130890 co-relation queries the response was YES. [2024-06-28 04:23:04,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25939 conditions, 4023 events. 2424/4023 cut-off events. For 130890/130890 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24266 event pairs, 389 based on Foata normal form. 12/4033 useless extension candidates. Maximal degree in co-relation 25867. Up to 3187 conditions per place. [2024-06-28 04:23:04,321 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 167 selfloop transitions, 76 changer transitions 0/248 dead transitions. [2024-06-28 04:23:04,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 248 transitions, 2931 flow [2024-06-28 04:23:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 04:23:04,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 04:23:04,322 INFO L175 Difference]: Start difference. First operand has 159 places, 205 transitions, 2353 flow. Second operand 9 states and 161 transitions. [2024-06-28 04:23:04,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 248 transitions, 2931 flow [2024-06-28 04:23:04,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 248 transitions, 2869 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 04:23:04,437 INFO L231 Difference]: Finished difference. Result has 163 places, 204 transitions, 2390 flow [2024-06-28 04:23:04,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2390, PETRI_PLACES=163, PETRI_TRANSITIONS=204} [2024-06-28 04:23:04,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-28 04:23:04,438 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 204 transitions, 2390 flow [2024-06-28 04:23:04,438 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) [2024-06-28 04:23:04,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:04,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:04,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:23:04,438 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:04,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:04,439 INFO L85 PathProgramCache]: Analyzing trace with hash -822787743, now seen corresponding path program 1 times [2024-06-28 04:23:04,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:04,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466813086] [2024-06-28 04:23:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:04,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:06,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:06,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466813086] [2024-06-28 04:23:06,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466813086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:06,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:06,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:06,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120979065] [2024-06-28 04:23:06,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:06,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:06,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:06,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:06,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:06,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 204 transitions, 2390 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) [2024-06-28 04:23:06,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:06,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:06,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:07,623 INFO L124 PetriNetUnfolderBase]: 2437/4050 cut-off events. [2024-06-28 04:23:07,623 INFO L125 PetriNetUnfolderBase]: For 131525/131525 co-relation queries the response was YES. [2024-06-28 04:23:07,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26607 conditions, 4050 events. 2437/4050 cut-off events. For 131525/131525 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24783 event pairs, 685 based on Foata normal form. 1/4049 useless extension candidates. Maximal degree in co-relation 26534. Up to 3833 conditions per place. [2024-06-28 04:23:07,654 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 202 selfloop transitions, 23 changer transitions 0/230 dead transitions. [2024-06-28 04:23:07,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 230 transitions, 3076 flow [2024-06-28 04:23:07,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:23:07,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:23:07,656 INFO L175 Difference]: Start difference. First operand has 163 places, 204 transitions, 2390 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:23:07,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 230 transitions, 3076 flow [2024-06-28 04:23:07,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 230 transitions, 2800 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-28 04:23:07,895 INFO L231 Difference]: Finished difference. Result has 161 places, 210 transitions, 2264 flow [2024-06-28 04:23:07,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2264, PETRI_PLACES=161, PETRI_TRANSITIONS=210} [2024-06-28 04:23:07,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-28 04:23:07,895 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 210 transitions, 2264 flow [2024-06-28 04:23:07,895 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) [2024-06-28 04:23:07,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:07,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:07,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:23:07,896 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:07,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash -822697533, now seen corresponding path program 2 times [2024-06-28 04:23:07,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:07,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892641096] [2024-06-28 04:23:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:07,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:11,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:11,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892641096] [2024-06-28 04:23:11,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892641096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:11,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:11,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:11,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434676977] [2024-06-28 04:23:11,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:11,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:11,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:11,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:11,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:11,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:11,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 210 transitions, 2264 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) [2024-06-28 04:23:11,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:11,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:11,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:12,027 INFO L124 PetriNetUnfolderBase]: 2434/4046 cut-off events. [2024-06-28 04:23:12,027 INFO L125 PetriNetUnfolderBase]: For 134145/134145 co-relation queries the response was YES. [2024-06-28 04:23:12,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26049 conditions, 4046 events. 2434/4046 cut-off events. For 134145/134145 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24804 event pairs, 684 based on Foata normal form. 1/4045 useless extension candidates. Maximal degree in co-relation 25977. Up to 3847 conditions per place. [2024-06-28 04:23:12,053 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 15 changer transitions 0/228 dead transitions. [2024-06-28 04:23:12,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 228 transitions, 2810 flow [2024-06-28 04:23:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 04:23:12,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-28 04:23:12,055 INFO L175 Difference]: Start difference. First operand has 161 places, 210 transitions, 2264 flow. Second operand 7 states and 111 transitions. [2024-06-28 04:23:12,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 228 transitions, 2810 flow [2024-06-28 04:23:12,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 228 transitions, 2751 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 04:23:12,213 INFO L231 Difference]: Finished difference. Result has 165 places, 213 transitions, 2299 flow [2024-06-28 04:23:12,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2299, PETRI_PLACES=165, PETRI_TRANSITIONS=213} [2024-06-28 04:23:12,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-28 04:23:12,214 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 213 transitions, 2299 flow [2024-06-28 04:23:12,214 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) [2024-06-28 04:23:12,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:12,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:12,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:23:12,214 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)] === [2024-06-28 04:23:12,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash 986979742, now seen corresponding path program 1 times [2024-06-28 04:23:12,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:12,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578414793] [2024-06-28 04:23:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:12,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:14,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:14,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578414793] [2024-06-28 04:23:14,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578414793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:14,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:14,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:14,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281253526] [2024-06-28 04:23:14,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:14,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:14,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:14,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:14,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:14,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:14,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 213 transitions, 2299 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) [2024-06-28 04:23:14,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:14,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:14,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:15,683 INFO L124 PetriNetUnfolderBase]: 2504/4147 cut-off events. [2024-06-28 04:23:15,683 INFO L125 PetriNetUnfolderBase]: For 149063/149063 co-relation queries the response was YES. [2024-06-28 04:23:15,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27482 conditions, 4147 events. 2504/4147 cut-off events. For 149063/149063 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 25340 event pairs, 643 based on Foata normal form. 6/4148 useless extension candidates. Maximal degree in co-relation 27408. Up to 3818 conditions per place. [2024-06-28 04:23:15,713 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 199 selfloop transitions, 37 changer transitions 0/241 dead transitions. [2024-06-28 04:23:15,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 241 transitions, 3087 flow [2024-06-28 04:23:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 04:23:15,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-28 04:23:15,716 INFO L175 Difference]: Start difference. First operand has 165 places, 213 transitions, 2299 flow. Second operand 7 states and 122 transitions. [2024-06-28 04:23:15,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 241 transitions, 3087 flow [2024-06-28 04:23:15,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 241 transitions, 3015 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 04:23:15,873 INFO L231 Difference]: Finished difference. Result has 168 places, 223 transitions, 2515 flow [2024-06-28 04:23:15,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2515, PETRI_PLACES=168, PETRI_TRANSITIONS=223} [2024-06-28 04:23:15,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-28 04:23:15,873 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 223 transitions, 2515 flow [2024-06-28 04:23:15,873 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) [2024-06-28 04:23:15,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:15,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:15,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:23:15,874 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:15,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:15,874 INFO L85 PathProgramCache]: Analyzing trace with hash -675087778, now seen corresponding path program 2 times [2024-06-28 04:23:15,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:15,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558823408] [2024-06-28 04:23:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:15,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:17,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:17,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558823408] [2024-06-28 04:23:17,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558823408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:17,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:17,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:17,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743708300] [2024-06-28 04:23:17,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:17,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:17,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:17,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:17,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:17,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:17,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 223 transitions, 2515 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) [2024-06-28 04:23:17,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:17,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:17,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:18,759 INFO L124 PetriNetUnfolderBase]: 2566/4216 cut-off events. [2024-06-28 04:23:18,759 INFO L125 PetriNetUnfolderBase]: For 163672/163672 co-relation queries the response was YES. [2024-06-28 04:23:18,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29235 conditions, 4216 events. 2566/4216 cut-off events. For 163672/163672 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25565 event pairs, 613 based on Foata normal form. 6/4212 useless extension candidates. Maximal degree in co-relation 29159. Up to 3788 conditions per place. [2024-06-28 04:23:18,791 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 197 selfloop transitions, 48 changer transitions 0/250 dead transitions. [2024-06-28 04:23:18,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 250 transitions, 3373 flow [2024-06-28 04:23:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:23:18,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 04:23:18,794 INFO L175 Difference]: Start difference. First operand has 168 places, 223 transitions, 2515 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:23:18,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 250 transitions, 3373 flow [2024-06-28 04:23:18,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 250 transitions, 3213 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-28 04:23:19,000 INFO L231 Difference]: Finished difference. Result has 171 places, 231 transitions, 2652 flow [2024-06-28 04:23:19,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2652, PETRI_PLACES=171, PETRI_TRANSITIONS=231} [2024-06-28 04:23:19,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-28 04:23:19,001 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 231 transitions, 2652 flow [2024-06-28 04:23:19,001 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) [2024-06-28 04:23:19,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:19,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:19,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:23:19,002 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:19,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1900346365, now seen corresponding path program 3 times [2024-06-28 04:23:19,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:19,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2347322] [2024-06-28 04:23:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:19,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:20,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:20,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2347322] [2024-06-28 04:23:20,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2347322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:20,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:20,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:20,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773086803] [2024-06-28 04:23:20,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:20,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:20,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:20,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:20,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:20,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:20,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 231 transitions, 2652 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) [2024-06-28 04:23:20,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:20,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:20,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:22,064 INFO L124 PetriNetUnfolderBase]: 2563/4231 cut-off events. [2024-06-28 04:23:22,064 INFO L125 PetriNetUnfolderBase]: For 165946/165946 co-relation queries the response was YES. [2024-06-28 04:23:22,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29429 conditions, 4231 events. 2563/4231 cut-off events. For 165946/165946 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25881 event pairs, 692 based on Foata normal form. 1/4230 useless extension candidates. Maximal degree in co-relation 29352. Up to 4036 conditions per place. [2024-06-28 04:23:22,096 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 222 selfloop transitions, 15 changer transitions 0/242 dead transitions. [2024-06-28 04:23:22,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 242 transitions, 3158 flow [2024-06-28 04:23:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 04:23:22,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-28 04:23:22,097 INFO L175 Difference]: Start difference. First operand has 171 places, 231 transitions, 2652 flow. Second operand 7 states and 107 transitions. [2024-06-28 04:23:22,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 242 transitions, 3158 flow [2024-06-28 04:23:22,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 242 transitions, 2999 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-28 04:23:22,294 INFO L231 Difference]: Finished difference. Result has 175 places, 231 transitions, 2529 flow [2024-06-28 04:23:22,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2529, PETRI_PLACES=175, PETRI_TRANSITIONS=231} [2024-06-28 04:23:22,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-28 04:23:22,294 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 231 transitions, 2529 flow [2024-06-28 04:23:22,294 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) [2024-06-28 04:23:22,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:22,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:22,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:23:22,295 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:22,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:22,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1900553910, now seen corresponding path program 3 times [2024-06-28 04:23:22,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:22,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86885812] [2024-06-28 04:23:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:22,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:24,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:24,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86885812] [2024-06-28 04:23:24,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86885812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:24,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:24,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:24,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025187474] [2024-06-28 04:23:24,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:24,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:24,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:24,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:24,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 231 transitions, 2529 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) [2024-06-28 04:23:24,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:24,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:24,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:25,302 INFO L124 PetriNetUnfolderBase]: 2585/4245 cut-off events. [2024-06-28 04:23:25,303 INFO L125 PetriNetUnfolderBase]: For 172751/172751 co-relation queries the response was YES. [2024-06-28 04:23:25,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29441 conditions, 4245 events. 2585/4245 cut-off events. For 172751/172751 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25727 event pairs, 610 based on Foata normal form. 6/4241 useless extension candidates. Maximal degree in co-relation 29362. Up to 3919 conditions per place. [2024-06-28 04:23:25,337 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 206 selfloop transitions, 46 changer transitions 0/257 dead transitions. [2024-06-28 04:23:25,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 257 transitions, 3247 flow [2024-06-28 04:23:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 04:23:25,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-28 04:23:25,338 INFO L175 Difference]: Start difference. First operand has 175 places, 231 transitions, 2529 flow. Second operand 7 states and 117 transitions. [2024-06-28 04:23:25,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 257 transitions, 3247 flow [2024-06-28 04:23:25,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 257 transitions, 3207 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 04:23:25,529 INFO L231 Difference]: Finished difference. Result has 178 places, 242 transitions, 2769 flow [2024-06-28 04:23:25,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2769, PETRI_PLACES=178, PETRI_TRANSITIONS=242} [2024-06-28 04:23:25,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-28 04:23:25,530 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 242 transitions, 2769 flow [2024-06-28 04:23:25,530 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) [2024-06-28 04:23:25,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:25,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:25,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:23:25,530 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:25,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:25,531 INFO L85 PathProgramCache]: Analyzing trace with hash -674872452, now seen corresponding path program 1 times [2024-06-28 04:23:25,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:25,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264646702] [2024-06-28 04:23:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:25,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:28,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:28,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264646702] [2024-06-28 04:23:28,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264646702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:28,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:28,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:28,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471444109] [2024-06-28 04:23:28,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:28,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:28,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:28,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:28,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:28,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:28,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 242 transitions, 2769 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:28,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:28,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:28,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:29,471 INFO L124 PetriNetUnfolderBase]: 2624/4304 cut-off events. [2024-06-28 04:23:29,471 INFO L125 PetriNetUnfolderBase]: For 186605/186605 co-relation queries the response was YES. [2024-06-28 04:23:29,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30286 conditions, 4304 events. 2624/4304 cut-off events. For 186605/186605 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26094 event pairs, 615 based on Foata normal form. 14/4307 useless extension candidates. Maximal degree in co-relation 30204. Up to 3923 conditions per place. [2024-06-28 04:23:29,504 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 209 selfloop transitions, 49 changer transitions 0/263 dead transitions. [2024-06-28 04:23:29,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 263 transitions, 3451 flow [2024-06-28 04:23:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:23:29,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 04:23:29,505 INFO L175 Difference]: Start difference. First operand has 178 places, 242 transitions, 2769 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:23:29,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 263 transitions, 3451 flow [2024-06-28 04:23:29,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 263 transitions, 3327 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 04:23:29,731 INFO L231 Difference]: Finished difference. Result has 182 places, 244 transitions, 2794 flow [2024-06-28 04:23:29,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2794, PETRI_PLACES=182, PETRI_TRANSITIONS=244} [2024-06-28 04:23:29,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-28 04:23:29,732 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 244 transitions, 2794 flow [2024-06-28 04:23:29,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:29,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:29,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:29,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:23:29,732 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:29,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:29,733 INFO L85 PathProgramCache]: Analyzing trace with hash 434643118, now seen corresponding path program 1 times [2024-06-28 04:23:29,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:29,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734711122] [2024-06-28 04:23:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:29,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:32,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734711122] [2024-06-28 04:23:32,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734711122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:32,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:32,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:32,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389927105] [2024-06-28 04:23:32,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:32,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:32,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:32,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:32,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 244 transitions, 2794 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) [2024-06-28 04:23:32,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:32,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:32,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:33,332 INFO L124 PetriNetUnfolderBase]: 2634/4338 cut-off events. [2024-06-28 04:23:33,332 INFO L125 PetriNetUnfolderBase]: For 179628/179628 co-relation queries the response was YES. [2024-06-28 04:23:33,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30532 conditions, 4338 events. 2634/4338 cut-off events. For 179628/179628 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 26455 event pairs, 643 based on Foata normal form. 2/4338 useless extension candidates. Maximal degree in co-relation 30449. Up to 4084 conditions per place. [2024-06-28 04:23:33,360 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 24 changer transitions 0/270 dead transitions. [2024-06-28 04:23:33,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 270 transitions, 3479 flow [2024-06-28 04:23:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:33,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:23:33,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 04:23:33,361 INFO L175 Difference]: Start difference. First operand has 182 places, 244 transitions, 2794 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:23:33,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 270 transitions, 3479 flow [2024-06-28 04:23:33,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 270 transitions, 3354 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 04:23:33,581 INFO L231 Difference]: Finished difference. Result has 184 places, 248 transitions, 2816 flow [2024-06-28 04:23:33,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2816, PETRI_PLACES=184, PETRI_TRANSITIONS=248} [2024-06-28 04:23:33,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-28 04:23:33,581 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 248 transitions, 2816 flow [2024-06-28 04:23:33,582 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) [2024-06-28 04:23:33,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:33,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:33,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:23:33,582 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:33,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1851781876, now seen corresponding path program 2 times [2024-06-28 04:23:33,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:33,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886914144] [2024-06-28 04:23:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:35,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:35,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886914144] [2024-06-28 04:23:35,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886914144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:35,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:35,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:35,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841665212] [2024-06-28 04:23:35,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:35,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:35,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:35,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:35,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:35,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 248 transitions, 2816 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) [2024-06-28 04:23:35,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:35,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:35,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:36,622 INFO L124 PetriNetUnfolderBase]: 2644/4354 cut-off events. [2024-06-28 04:23:36,622 INFO L125 PetriNetUnfolderBase]: For 184530/184530 co-relation queries the response was YES. [2024-06-28 04:23:36,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30617 conditions, 4354 events. 2644/4354 cut-off events. For 184530/184530 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26568 event pairs, 611 based on Foata normal form. 2/4354 useless extension candidates. Maximal degree in co-relation 30533. Up to 4022 conditions per place. [2024-06-28 04:23:36,654 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 222 selfloop transitions, 46 changer transitions 0/273 dead transitions. [2024-06-28 04:23:36,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 273 transitions, 3548 flow [2024-06-28 04:23:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 04:23:36,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-28 04:23:36,655 INFO L175 Difference]: Start difference. First operand has 184 places, 248 transitions, 2816 flow. Second operand 7 states and 124 transitions. [2024-06-28 04:23:36,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 273 transitions, 3548 flow [2024-06-28 04:23:36,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 273 transitions, 3444 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 04:23:36,877 INFO L231 Difference]: Finished difference. Result has 186 places, 251 transitions, 2892 flow [2024-06-28 04:23:36,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2712, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2892, PETRI_PLACES=186, PETRI_TRANSITIONS=251} [2024-06-28 04:23:36,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-28 04:23:36,877 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 251 transitions, 2892 flow [2024-06-28 04:23:36,877 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) [2024-06-28 04:23:36,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:36,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:36,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:23:36,878 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:36,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash -732114474, now seen corresponding path program 3 times [2024-06-28 04:23:36,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:36,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481498278] [2024-06-28 04:23:36,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:36,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:39,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481498278] [2024-06-28 04:23:39,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481498278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:39,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:39,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092082476] [2024-06-28 04:23:39,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:39,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:39,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:39,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:39,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:39,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:39,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 251 transitions, 2892 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) [2024-06-28 04:23:39,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:39,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:39,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:40,457 INFO L124 PetriNetUnfolderBase]: 2642/4359 cut-off events. [2024-06-28 04:23:40,458 INFO L125 PetriNetUnfolderBase]: For 189892/189892 co-relation queries the response was YES. [2024-06-28 04:23:40,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30744 conditions, 4359 events. 2642/4359 cut-off events. For 189892/189892 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26719 event pairs, 653 based on Foata normal form. 2/4356 useless extension candidates. Maximal degree in co-relation 30659. Up to 4062 conditions per place. [2024-06-28 04:23:40,493 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 30 changer transitions 0/273 dead transitions. [2024-06-28 04:23:40,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 273 transitions, 3558 flow [2024-06-28 04:23:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:23:40,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 04:23:40,494 INFO L175 Difference]: Start difference. First operand has 186 places, 251 transitions, 2892 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:23:40,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 273 transitions, 3558 flow [2024-06-28 04:23:40,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 273 transitions, 3449 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 04:23:40,733 INFO L231 Difference]: Finished difference. Result has 189 places, 254 transitions, 2923 flow [2024-06-28 04:23:40,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2923, PETRI_PLACES=189, PETRI_TRANSITIONS=254} [2024-06-28 04:23:40,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-28 04:23:40,733 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 254 transitions, 2923 flow [2024-06-28 04:23:40,733 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) [2024-06-28 04:23:40,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:40,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:40,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:23:40,734 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:40,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:40,734 INFO L85 PathProgramCache]: Analyzing trace with hash 520490030, now seen corresponding path program 4 times [2024-06-28 04:23:40,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:40,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645517901] [2024-06-28 04:23:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:40,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:43,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:43,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645517901] [2024-06-28 04:23:43,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645517901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:43,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:43,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:43,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197084193] [2024-06-28 04:23:43,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:43,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:43,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:43,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:43,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:43,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:43,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 254 transitions, 2923 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) [2024-06-28 04:23:43,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:43,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:43,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:44,236 INFO L124 PetriNetUnfolderBase]: 2629/4346 cut-off events. [2024-06-28 04:23:44,236 INFO L125 PetriNetUnfolderBase]: For 192800/192800 co-relation queries the response was YES. [2024-06-28 04:23:44,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30487 conditions, 4346 events. 2629/4346 cut-off events. For 192800/192800 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26743 event pairs, 648 based on Foata normal form. 3/4343 useless extension candidates. Maximal degree in co-relation 30401. Up to 4000 conditions per place. [2024-06-28 04:23:44,267 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 224 selfloop transitions, 42 changer transitions 0/271 dead transitions. [2024-06-28 04:23:44,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 271 transitions, 3515 flow [2024-06-28 04:23:44,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:23:44,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 04:23:44,268 INFO L175 Difference]: Start difference. First operand has 189 places, 254 transitions, 2923 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:23:44,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 271 transitions, 3515 flow [2024-06-28 04:23:44,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 271 transitions, 3351 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-28 04:23:44,537 INFO L231 Difference]: Finished difference. Result has 191 places, 254 transitions, 2851 flow [2024-06-28 04:23:44,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2851, PETRI_PLACES=191, PETRI_TRANSITIONS=254} [2024-06-28 04:23:44,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-28 04:23:44,538 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 254 transitions, 2851 flow [2024-06-28 04:23:44,538 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) [2024-06-28 04:23:44,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:44,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:44,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:23:44,539 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:44,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:44,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1218811374, now seen corresponding path program 5 times [2024-06-28 04:23:44,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:44,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919317818] [2024-06-28 04:23:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:44,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:46,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:46,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919317818] [2024-06-28 04:23:46,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919317818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:46,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:46,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:46,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140303465] [2024-06-28 04:23:46,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:46,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:46,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:46,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:46,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 254 transitions, 2851 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) [2024-06-28 04:23:46,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:46,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:46,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:48,087 INFO L124 PetriNetUnfolderBase]: 2761/4531 cut-off events. [2024-06-28 04:23:48,087 INFO L125 PetriNetUnfolderBase]: For 226164/226164 co-relation queries the response was YES. [2024-06-28 04:23:48,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33038 conditions, 4531 events. 2761/4531 cut-off events. For 226164/226164 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27708 event pairs, 539 based on Foata normal form. 6/4526 useless extension candidates. Maximal degree in co-relation 32951. Up to 3532 conditions per place. [2024-06-28 04:23:48,124 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 174 selfloop transitions, 113 changer transitions 0/292 dead transitions. [2024-06-28 04:23:48,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 292 transitions, 4010 flow [2024-06-28 04:23:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:23:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:23:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:23:48,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:23:48,126 INFO L175 Difference]: Start difference. First operand has 191 places, 254 transitions, 2851 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:23:48,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 292 transitions, 4010 flow [2024-06-28 04:23:48,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 292 transitions, 3894 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 04:23:48,418 INFO L231 Difference]: Finished difference. Result has 195 places, 265 transitions, 3299 flow [2024-06-28 04:23:48,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3299, PETRI_PLACES=195, PETRI_TRANSITIONS=265} [2024-06-28 04:23:48,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-28 04:23:48,419 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 265 transitions, 3299 flow [2024-06-28 04:23:48,419 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) [2024-06-28 04:23:48,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:48,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:48,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:23:48,419 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)] === [2024-06-28 04:23:48,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1225477614, now seen corresponding path program 6 times [2024-06-28 04:23:48,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:48,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931236193] [2024-06-28 04:23:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:48,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:50,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:50,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931236193] [2024-06-28 04:23:50,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931236193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:50,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:50,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:50,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310610641] [2024-06-28 04:23:50,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:50,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:50,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:50,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:50,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:50,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:50,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 265 transitions, 3299 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) [2024-06-28 04:23:50,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:50,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:50,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:51,580 INFO L124 PetriNetUnfolderBase]: 2751/4513 cut-off events. [2024-06-28 04:23:51,580 INFO L125 PetriNetUnfolderBase]: For 235886/235886 co-relation queries the response was YES. [2024-06-28 04:23:51,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34401 conditions, 4513 events. 2751/4513 cut-off events. For 235886/235886 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27535 event pairs, 660 based on Foata normal form. 6/4508 useless extension candidates. Maximal degree in co-relation 34311. Up to 4165 conditions per place. [2024-06-28 04:23:51,614 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 233 selfloop transitions, 45 changer transitions 0/283 dead transitions. [2024-06-28 04:23:51,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 283 transitions, 4033 flow [2024-06-28 04:23:51,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 04:23:51,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-28 04:23:51,615 INFO L175 Difference]: Start difference. First operand has 195 places, 265 transitions, 3299 flow. Second operand 7 states and 117 transitions. [2024-06-28 04:23:51,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 283 transitions, 4033 flow [2024-06-28 04:23:51,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 283 transitions, 3900 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-28 04:23:51,946 INFO L231 Difference]: Finished difference. Result has 199 places, 268 transitions, 3353 flow [2024-06-28 04:23:51,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3353, PETRI_PLACES=199, PETRI_TRANSITIONS=268} [2024-06-28 04:23:51,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-28 04:23:51,947 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 268 transitions, 3353 flow [2024-06-28 04:23:51,947 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) [2024-06-28 04:23:51,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:51,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:51,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:23:51,947 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)] === [2024-06-28 04:23:51,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:51,947 INFO L85 PathProgramCache]: Analyzing trace with hash 263325676, now seen corresponding path program 1 times [2024-06-28 04:23:51,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:51,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37068288] [2024-06-28 04:23:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:51,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:54,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:54,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37068288] [2024-06-28 04:23:54,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37068288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:54,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:54,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:23:54,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009712848] [2024-06-28 04:23:54,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:54,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:23:54,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:23:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:23:54,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:54,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 268 transitions, 3353 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) [2024-06-28 04:23:54,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:54,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:54,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:55,566 INFO L124 PetriNetUnfolderBase]: 2772/4551 cut-off events. [2024-06-28 04:23:55,566 INFO L125 PetriNetUnfolderBase]: For 238848/238848 co-relation queries the response was YES. [2024-06-28 04:23:55,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34749 conditions, 4551 events. 2772/4551 cut-off events. For 238848/238848 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27923 event pairs, 700 based on Foata normal form. 2/4551 useless extension candidates. Maximal degree in co-relation 34657. Up to 4280 conditions per place. [2024-06-28 04:23:55,601 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 28 changer transitions 0/299 dead transitions. [2024-06-28 04:23:55,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 299 transitions, 4233 flow [2024-06-28 04:23:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:23:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:23:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:23:55,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:23:55,602 INFO L175 Difference]: Start difference. First operand has 199 places, 268 transitions, 3353 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:23:55,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 299 transitions, 4233 flow [2024-06-28 04:23:55,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 299 transitions, 4037 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 04:23:55,959 INFO L231 Difference]: Finished difference. Result has 201 places, 272 transitions, 3322 flow [2024-06-28 04:23:55,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3322, PETRI_PLACES=201, PETRI_TRANSITIONS=272} [2024-06-28 04:23:55,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-28 04:23:55,960 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 272 transitions, 3322 flow [2024-06-28 04:23:55,960 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) [2024-06-28 04:23:55,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:55,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:55,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:23:55,961 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)] === [2024-06-28 04:23:55,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:55,961 INFO L85 PathProgramCache]: Analyzing trace with hash 528801998, now seen corresponding path program 2 times [2024-06-28 04:23:55,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:55,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900039163] [2024-06-28 04:23:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:55,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:58,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:58,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900039163] [2024-06-28 04:23:58,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900039163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:58,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:58,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:23:58,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199222182] [2024-06-28 04:23:58,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:58,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:23:58,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:58,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:23:58,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:23:58,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:23:58,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 272 transitions, 3322 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) [2024-06-28 04:23:58,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:58,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:23:58,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:59,614 INFO L124 PetriNetUnfolderBase]: 2780/4577 cut-off events. [2024-06-28 04:23:59,614 INFO L125 PetriNetUnfolderBase]: For 243144/243144 co-relation queries the response was YES. [2024-06-28 04:23:59,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34777 conditions, 4577 events. 2780/4577 cut-off events. For 243144/243144 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28127 event pairs, 738 based on Foata normal form. 2/4577 useless extension candidates. Maximal degree in co-relation 34684. Up to 4327 conditions per place. [2024-06-28 04:23:59,650 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 25 changer transitions 0/295 dead transitions. [2024-06-28 04:23:59,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 295 transitions, 4024 flow [2024-06-28 04:23:59,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:23:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:23:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 04:23:59,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 04:23:59,652 INFO L175 Difference]: Start difference. First operand has 201 places, 272 transitions, 3322 flow. Second operand 8 states and 130 transitions. [2024-06-28 04:23:59,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 295 transitions, 4024 flow [2024-06-28 04:23:59,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 295 transitions, 3927 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-28 04:23:59,981 INFO L231 Difference]: Finished difference. Result has 205 places, 274 transitions, 3338 flow [2024-06-28 04:23:59,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3338, PETRI_PLACES=205, PETRI_TRANSITIONS=274} [2024-06-28 04:23:59,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-28 04:23:59,981 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 274 transitions, 3338 flow [2024-06-28 04:23:59,981 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) [2024-06-28 04:23:59,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:59,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:59,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:23:59,982 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)] === [2024-06-28 04:23:59,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash 528802122, now seen corresponding path program 1 times [2024-06-28 04:23:59,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:59,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793631439] [2024-06-28 04:23:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:59,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:02,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:02,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793631439] [2024-06-28 04:24:02,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793631439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:02,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:02,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:02,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359054127] [2024-06-28 04:24:02,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:02,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:02,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:02,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:02,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:02,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:02,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 274 transitions, 3338 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) [2024-06-28 04:24:02,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:02,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:02,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:04,458 INFO L124 PetriNetUnfolderBase]: 2914/4766 cut-off events. [2024-06-28 04:24:04,458 INFO L125 PetriNetUnfolderBase]: For 274284/274284 co-relation queries the response was YES. [2024-06-28 04:24:04,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37230 conditions, 4766 events. 2914/4766 cut-off events. For 274284/274284 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29198 event pairs, 692 based on Foata normal form. 6/4767 useless extension candidates. Maximal degree in co-relation 37135. Up to 4221 conditions per place. [2024-06-28 04:24:04,502 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 77 changer transitions 0/315 dead transitions. [2024-06-28 04:24:04,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 315 transitions, 4616 flow [2024-06-28 04:24:04,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:24:04,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 04:24:04,504 INFO L175 Difference]: Start difference. First operand has 205 places, 274 transitions, 3338 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:24:04,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 315 transitions, 4616 flow [2024-06-28 04:24:04,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 315 transitions, 4535 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:04,928 INFO L231 Difference]: Finished difference. Result has 208 places, 288 transitions, 3768 flow [2024-06-28 04:24:04,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3257, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3768, PETRI_PLACES=208, PETRI_TRANSITIONS=288} [2024-06-28 04:24:04,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-28 04:24:04,928 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 288 transitions, 3768 flow [2024-06-28 04:24:04,928 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) [2024-06-28 04:24:04,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:04,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:04,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 04:24:04,929 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:04,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:04,929 INFO L85 PathProgramCache]: Analyzing trace with hash 266187410, now seen corresponding path program 2 times [2024-06-28 04:24:04,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:04,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469389380] [2024-06-28 04:24:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:04,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:07,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:07,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469389380] [2024-06-28 04:24:07,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469389380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:07,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:07,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:07,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106622664] [2024-06-28 04:24:07,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:07,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:07,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:07,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:07,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:07,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:07,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 288 transitions, 3768 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) [2024-06-28 04:24:07,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:07,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:07,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:09,157 INFO L124 PetriNetUnfolderBase]: 2944/4807 cut-off events. [2024-06-28 04:24:09,157 INFO L125 PetriNetUnfolderBase]: For 289623/289623 co-relation queries the response was YES. [2024-06-28 04:24:09,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38868 conditions, 4807 events. 2944/4807 cut-off events. For 289623/289623 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29442 event pairs, 701 based on Foata normal form. 6/4807 useless extension candidates. Maximal degree in co-relation 38771. Up to 4427 conditions per place. [2024-06-28 04:24:09,202 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 257 selfloop transitions, 50 changer transitions 0/312 dead transitions. [2024-06-28 04:24:09,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 312 transitions, 4580 flow [2024-06-28 04:24:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:24:09,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:24:09,203 INFO L175 Difference]: Start difference. First operand has 208 places, 288 transitions, 3768 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:24:09,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 312 transitions, 4580 flow [2024-06-28 04:24:09,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 312 transitions, 4411 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:09,717 INFO L231 Difference]: Finished difference. Result has 213 places, 293 transitions, 3841 flow [2024-06-28 04:24:09,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3613, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3841, PETRI_PLACES=213, PETRI_TRANSITIONS=293} [2024-06-28 04:24:09,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-28 04:24:09,718 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 293 transitions, 3841 flow [2024-06-28 04:24:09,718 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) [2024-06-28 04:24:09,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:09,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:09,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 04:24:09,718 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)] === [2024-06-28 04:24:09,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:09,719 INFO L85 PathProgramCache]: Analyzing trace with hash 266182636, now seen corresponding path program 3 times [2024-06-28 04:24:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:09,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227706727] [2024-06-28 04:24:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:09,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:12,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:12,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227706727] [2024-06-28 04:24:12,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227706727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:12,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:12,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:12,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161688061] [2024-06-28 04:24:12,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:12,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:12,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:12,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:12,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:12,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:12,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 293 transitions, 3841 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) [2024-06-28 04:24:12,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:12,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:12,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:14,078 INFO L124 PetriNetUnfolderBase]: 2939/4800 cut-off events. [2024-06-28 04:24:14,078 INFO L125 PetriNetUnfolderBase]: For 285311/285311 co-relation queries the response was YES. [2024-06-28 04:24:14,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38418 conditions, 4800 events. 2939/4800 cut-off events. For 285311/285311 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29425 event pairs, 748 based on Foata normal form. 2/4800 useless extension candidates. Maximal degree in co-relation 38319. Up to 4565 conditions per place. [2024-06-28 04:24:14,122 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 290 selfloop transitions, 16 changer transitions 0/311 dead transitions. [2024-06-28 04:24:14,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 311 transitions, 4561 flow [2024-06-28 04:24:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 04:24:14,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:24:14,123 INFO L175 Difference]: Start difference. First operand has 213 places, 293 transitions, 3841 flow. Second operand 7 states and 112 transitions. [2024-06-28 04:24:14,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 311 transitions, 4561 flow [2024-06-28 04:24:14,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 311 transitions, 4381 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:14,566 INFO L231 Difference]: Finished difference. Result has 214 places, 295 transitions, 3760 flow [2024-06-28 04:24:14,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3760, PETRI_PLACES=214, PETRI_TRANSITIONS=295} [2024-06-28 04:24:14,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-28 04:24:14,566 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 295 transitions, 3760 flow [2024-06-28 04:24:14,567 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) [2024-06-28 04:24:14,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:14,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:14,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 04:24:14,567 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)] === [2024-06-28 04:24:14,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash 266182760, now seen corresponding path program 3 times [2024-06-28 04:24:14,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:14,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721311143] [2024-06-28 04:24:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:14,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:17,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:17,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721311143] [2024-06-28 04:24:17,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721311143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:17,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:17,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:17,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998273800] [2024-06-28 04:24:17,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:17,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:17,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:17,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:17,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:17,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:17,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 295 transitions, 3760 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) [2024-06-28 04:24:17,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:17,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:17,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:19,243 INFO L124 PetriNetUnfolderBase]: 3017/4905 cut-off events. [2024-06-28 04:24:19,243 INFO L125 PetriNetUnfolderBase]: For 304011/304011 co-relation queries the response was YES. [2024-06-28 04:24:19,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39527 conditions, 4905 events. 3017/4905 cut-off events. For 304011/304011 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29923 event pairs, 674 based on Foata normal form. 8/4903 useless extension candidates. Maximal degree in co-relation 39427. Up to 4169 conditions per place. [2024-06-28 04:24:19,288 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 233 selfloop transitions, 100 changer transitions 0/338 dead transitions. [2024-06-28 04:24:19,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 338 transitions, 5186 flow [2024-06-28 04:24:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:24:19,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:24:19,289 INFO L175 Difference]: Start difference. First operand has 214 places, 295 transitions, 3760 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:24:19,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 338 transitions, 5186 flow [2024-06-28 04:24:19,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 338 transitions, 5103 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 04:24:19,876 INFO L231 Difference]: Finished difference. Result has 220 places, 313 transitions, 4383 flow [2024-06-28 04:24:19,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4383, PETRI_PLACES=220, PETRI_TRANSITIONS=313} [2024-06-28 04:24:19,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-28 04:24:19,876 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 313 transitions, 4383 flow [2024-06-28 04:24:19,876 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) [2024-06-28 04:24:19,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:19,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:19,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 04:24:19,877 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)] === [2024-06-28 04:24:19,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:19,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2072789714, now seen corresponding path program 1 times [2024-06-28 04:24:19,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:19,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269013744] [2024-06-28 04:24:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:19,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:22,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:22,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269013744] [2024-06-28 04:24:22,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269013744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:22,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:22,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:22,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580779255] [2024-06-28 04:24:22,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:22,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:22,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:22,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:22,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:22,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:22,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 313 transitions, 4383 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) [2024-06-28 04:24:22,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:22,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:22,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:23,764 INFO L124 PetriNetUnfolderBase]: 3020/4899 cut-off events. [2024-06-28 04:24:23,764 INFO L125 PetriNetUnfolderBase]: For 312123/312123 co-relation queries the response was YES. [2024-06-28 04:24:23,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41092 conditions, 4899 events. 3020/4899 cut-off events. For 312123/312123 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 29790 event pairs, 675 based on Foata normal form. 3/4891 useless extension candidates. Maximal degree in co-relation 40988. Up to 4513 conditions per place. [2024-06-28 04:24:23,804 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 55 changer transitions 0/331 dead transitions. [2024-06-28 04:24:23,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 331 transitions, 5225 flow [2024-06-28 04:24:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:24:23,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:24:23,805 INFO L175 Difference]: Start difference. First operand has 220 places, 313 transitions, 4383 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:24:23,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 331 transitions, 5225 flow [2024-06-28 04:24:24,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 331 transitions, 4994 flow, removed 95 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:24,287 INFO L231 Difference]: Finished difference. Result has 224 places, 316 transitions, 4370 flow [2024-06-28 04:24:24,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4370, PETRI_PLACES=224, PETRI_TRANSITIONS=316} [2024-06-28 04:24:24,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-28 04:24:24,288 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 316 transitions, 4370 flow [2024-06-28 04:24:24,288 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) [2024-06-28 04:24:24,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:24,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:24,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 04:24:24,288 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)] === [2024-06-28 04:24:24,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash 553546804, now seen corresponding path program 4 times [2024-06-28 04:24:24,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:24,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841901250] [2024-06-28 04:24:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:27,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:27,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841901250] [2024-06-28 04:24:27,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841901250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:27,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:27,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:27,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967365988] [2024-06-28 04:24:27,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:27,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:27,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:27,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:27,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 316 transitions, 4370 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) [2024-06-28 04:24:27,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:27,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:27,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:28,849 INFO L124 PetriNetUnfolderBase]: 3184/5158 cut-off events. [2024-06-28 04:24:28,849 INFO L125 PetriNetUnfolderBase]: For 355347/355347 co-relation queries the response was YES. [2024-06-28 04:24:28,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44057 conditions, 5158 events. 3184/5158 cut-off events. For 355347/355347 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31744 event pairs, 559 based on Foata normal form. 6/5153 useless extension candidates. Maximal degree in co-relation 43952. Up to 4224 conditions per place. [2024-06-28 04:24:28,895 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 248 selfloop transitions, 134 changer transitions 0/387 dead transitions. [2024-06-28 04:24:28,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 387 transitions, 6310 flow [2024-06-28 04:24:28,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:24:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:24:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 04:24:28,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 04:24:28,896 INFO L175 Difference]: Start difference. First operand has 224 places, 316 transitions, 4370 flow. Second operand 10 states and 177 transitions. [2024-06-28 04:24:28,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 387 transitions, 6310 flow [2024-06-28 04:24:29,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 387 transitions, 6081 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-28 04:24:29,407 INFO L231 Difference]: Finished difference. Result has 231 places, 352 transitions, 5330 flow [2024-06-28 04:24:29,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4194, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5330, PETRI_PLACES=231, PETRI_TRANSITIONS=352} [2024-06-28 04:24:29,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-28 04:24:29,408 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 352 transitions, 5330 flow [2024-06-28 04:24:29,408 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) [2024-06-28 04:24:29,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:29,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:29,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 04:24:29,408 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)] === [2024-06-28 04:24:29,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:29,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1218797672, now seen corresponding path program 5 times [2024-06-28 04:24:29,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:29,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601771294] [2024-06-28 04:24:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:29,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:31,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:31,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601771294] [2024-06-28 04:24:31,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601771294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:31,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:31,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:31,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787653445] [2024-06-28 04:24:31,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:31,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:31,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:31,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:31,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:31,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:31,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 352 transitions, 5330 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) [2024-06-28 04:24:31,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:31,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:31,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:33,227 INFO L124 PetriNetUnfolderBase]: 3234/5224 cut-off events. [2024-06-28 04:24:33,227 INFO L125 PetriNetUnfolderBase]: For 377812/377812 co-relation queries the response was YES. [2024-06-28 04:24:33,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46960 conditions, 5224 events. 3234/5224 cut-off events. For 377812/377812 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32001 event pairs, 686 based on Foata normal form. 6/5219 useless extension candidates. Maximal degree in co-relation 46852. Up to 4719 conditions per place. [2024-06-28 04:24:33,273 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 298 selfloop transitions, 87 changer transitions 0/390 dead transitions. [2024-06-28 04:24:33,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 390 transitions, 6751 flow [2024-06-28 04:24:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:24:33,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:24:33,274 INFO L175 Difference]: Start difference. First operand has 231 places, 352 transitions, 5330 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:24:33,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 390 transitions, 6751 flow [2024-06-28 04:24:33,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 390 transitions, 6556 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-28 04:24:33,921 INFO L231 Difference]: Finished difference. Result has 236 places, 374 transitions, 5872 flow [2024-06-28 04:24:33,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5142, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5872, PETRI_PLACES=236, PETRI_TRANSITIONS=374} [2024-06-28 04:24:33,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-28 04:24:33,922 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 374 transitions, 5872 flow [2024-06-28 04:24:33,922 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) [2024-06-28 04:24:33,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:33,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:33,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 04:24:33,923 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)] === [2024-06-28 04:24:33,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:33,923 INFO L85 PathProgramCache]: Analyzing trace with hash 547113064, now seen corresponding path program 6 times [2024-06-28 04:24:33,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:33,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645016640] [2024-06-28 04:24:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:33,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:36,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:36,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645016640] [2024-06-28 04:24:36,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645016640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:36,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:36,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:36,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372061517] [2024-06-28 04:24:36,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:36,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:36,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:36,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:36,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 374 transitions, 5872 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) [2024-06-28 04:24:36,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:36,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:36,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:38,547 INFO L124 PetriNetUnfolderBase]: 3348/5401 cut-off events. [2024-06-28 04:24:38,547 INFO L125 PetriNetUnfolderBase]: For 422337/422337 co-relation queries the response was YES. [2024-06-28 04:24:38,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50503 conditions, 5401 events. 3348/5401 cut-off events. For 422337/422337 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 33291 event pairs, 577 based on Foata normal form. 6/5396 useless extension candidates. Maximal degree in co-relation 50391. Up to 4149 conditions per place. [2024-06-28 04:24:38,602 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 242 selfloop transitions, 173 changer transitions 0/420 dead transitions. [2024-06-28 04:24:38,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 420 transitions, 7597 flow [2024-06-28 04:24:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:24:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:24:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-28 04:24:38,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:24:38,607 INFO L175 Difference]: Start difference. First operand has 236 places, 374 transitions, 5872 flow. Second operand 10 states and 175 transitions. [2024-06-28 04:24:38,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 420 transitions, 7597 flow [2024-06-28 04:24:39,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 420 transitions, 7265 flow, removed 151 selfloop flow, removed 2 redundant places. [2024-06-28 04:24:39,346 INFO L231 Difference]: Finished difference. Result has 246 places, 390 transitions, 6512 flow [2024-06-28 04:24:39,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6512, PETRI_PLACES=246, PETRI_TRANSITIONS=390} [2024-06-28 04:24:39,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-28 04:24:39,347 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 390 transitions, 6512 flow [2024-06-28 04:24:39,347 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) [2024-06-28 04:24:39,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:39,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:39,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 04:24:39,347 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:39,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:39,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1218802446, now seen corresponding path program 4 times [2024-06-28 04:24:39,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:39,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782664643] [2024-06-28 04:24:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:39,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:41,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:41,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782664643] [2024-06-28 04:24:41,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782664643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:41,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:41,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:41,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897616262] [2024-06-28 04:24:41,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:41,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:41,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:41,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:41,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:41,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:41,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 390 transitions, 6512 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) [2024-06-28 04:24:41,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:41,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:41,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:43,591 INFO L124 PetriNetUnfolderBase]: 3408/5490 cut-off events. [2024-06-28 04:24:43,591 INFO L125 PetriNetUnfolderBase]: For 448015/448015 co-relation queries the response was YES. [2024-06-28 04:24:43,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53724 conditions, 5490 events. 3408/5490 cut-off events. For 448015/448015 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33625 event pairs, 606 based on Foata normal form. 2/5490 useless extension candidates. Maximal degree in co-relation 53608. Up to 4769 conditions per place. [2024-06-28 04:24:43,652 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 315 selfloop transitions, 108 changer transitions 0/428 dead transitions. [2024-06-28 04:24:43,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 428 transitions, 7925 flow [2024-06-28 04:24:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:24:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:24:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 04:24:43,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-28 04:24:43,655 INFO L175 Difference]: Start difference. First operand has 246 places, 390 transitions, 6512 flow. Second operand 9 states and 143 transitions. [2024-06-28 04:24:43,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 428 transitions, 7925 flow [2024-06-28 04:24:44,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 428 transitions, 7539 flow, removed 124 selfloop flow, removed 5 redundant places. [2024-06-28 04:24:44,683 INFO L231 Difference]: Finished difference. Result has 251 places, 407 transitions, 6858 flow [2024-06-28 04:24:44,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6131, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6858, PETRI_PLACES=251, PETRI_TRANSITIONS=407} [2024-06-28 04:24:44,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-28 04:24:44,684 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 407 transitions, 6858 flow [2024-06-28 04:24:44,684 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) [2024-06-28 04:24:44,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:44,684 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] [2024-06-28 04:24:44,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 04:24:44,684 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:44,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:44,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1298549740, now seen corresponding path program 1 times [2024-06-28 04:24:44,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:44,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451328996] [2024-06-28 04:24:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:44,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:46,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:46,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451328996] [2024-06-28 04:24:46,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451328996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:46,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:46,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:46,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350408545] [2024-06-28 04:24:46,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:46,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:46,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:46,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:46,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:46,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 407 transitions, 6858 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) [2024-06-28 04:24:46,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:46,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:46,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:48,697 INFO L124 PetriNetUnfolderBase]: 3445/5550 cut-off events. [2024-06-28 04:24:48,697 INFO L125 PetriNetUnfolderBase]: For 462905/462905 co-relation queries the response was YES. [2024-06-28 04:24:48,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55143 conditions, 5550 events. 3445/5550 cut-off events. For 462905/462905 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 34050 event pairs, 730 based on Foata normal form. 1/5549 useless extension candidates. Maximal degree in co-relation 55024. Up to 5172 conditions per place. [2024-06-28 04:24:48,756 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 54 changer transitions 0/470 dead transitions. [2024-06-28 04:24:48,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 470 transitions, 8819 flow [2024-06-28 04:24:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 04:24:48,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 04:24:48,758 INFO L175 Difference]: Start difference. First operand has 251 places, 407 transitions, 6858 flow. Second operand 8 states and 150 transitions. [2024-06-28 04:24:48,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 470 transitions, 8819 flow [2024-06-28 04:24:49,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 470 transitions, 8761 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:49,637 INFO L231 Difference]: Finished difference. Result has 257 places, 437 transitions, 7691 flow [2024-06-28 04:24:49,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6804, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7691, PETRI_PLACES=257, PETRI_TRANSITIONS=437} [2024-06-28 04:24:49,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-28 04:24:49,638 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 437 transitions, 7691 flow [2024-06-28 04:24:49,638 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) [2024-06-28 04:24:49,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:49,638 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] [2024-06-28 04:24:49,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 04:24:49,638 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:49,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:49,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1224442374, now seen corresponding path program 2 times [2024-06-28 04:24:49,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:49,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501555276] [2024-06-28 04:24:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:49,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:52,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:52,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501555276] [2024-06-28 04:24:52,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501555276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:52,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:52,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:52,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178220842] [2024-06-28 04:24:52,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:52,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:52,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:52,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:52,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:52,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:52,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 437 transitions, 7691 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) [2024-06-28 04:24:52,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:52,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:52,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:54,809 INFO L124 PetriNetUnfolderBase]: 3445/5539 cut-off events. [2024-06-28 04:24:54,809 INFO L125 PetriNetUnfolderBase]: For 469984/469984 co-relation queries the response was YES. [2024-06-28 04:24:54,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55723 conditions, 5539 events. 3445/5539 cut-off events. For 469984/469984 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33922 event pairs, 686 based on Foata normal form. 4/5541 useless extension candidates. Maximal degree in co-relation 55598. Up to 5044 conditions per place. [2024-06-28 04:24:54,865 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 383 selfloop transitions, 85 changer transitions 0/473 dead transitions. [2024-06-28 04:24:54,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 473 transitions, 8973 flow [2024-06-28 04:24:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:24:54,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:24:54,866 INFO L175 Difference]: Start difference. First operand has 257 places, 437 transitions, 7691 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:24:54,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 473 transitions, 8973 flow [2024-06-28 04:24:55,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 473 transitions, 8863 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-28 04:24:55,696 INFO L231 Difference]: Finished difference. Result has 264 places, 446 transitions, 8028 flow [2024-06-28 04:24:55,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7583, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8028, PETRI_PLACES=264, PETRI_TRANSITIONS=446} [2024-06-28 04:24:55,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-28 04:24:55,697 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 446 transitions, 8028 flow [2024-06-28 04:24:55,698 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) [2024-06-28 04:24:55,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:55,698 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] [2024-06-28 04:24:55,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 04:24:55,698 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:55,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:55,698 INFO L85 PathProgramCache]: Analyzing trace with hash 473865120, now seen corresponding path program 3 times [2024-06-28 04:24:55,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:55,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080607943] [2024-06-28 04:24:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:55,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:58,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:58,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080607943] [2024-06-28 04:24:58,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080607943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:58,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:58,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147226025] [2024-06-28 04:24:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:58,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:58,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:58,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:58,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:24:58,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 446 transitions, 8028 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) [2024-06-28 04:24:58,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:58,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:24:58,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:00,157 INFO L124 PetriNetUnfolderBase]: 3491/5606 cut-off events. [2024-06-28 04:25:00,158 INFO L125 PetriNetUnfolderBase]: For 499151/499151 co-relation queries the response was YES. [2024-06-28 04:25:00,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57307 conditions, 5606 events. 3491/5606 cut-off events. For 499151/499151 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 34377 event pairs, 572 based on Foata normal form. 2/5606 useless extension candidates. Maximal degree in co-relation 57179. Up to 4691 conditions per place. [2024-06-28 04:25:00,217 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 324 selfloop transitions, 163 changer transitions 0/492 dead transitions. [2024-06-28 04:25:00,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 492 transitions, 9643 flow [2024-06-28 04:25:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 04:25:00,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 04:25:00,218 INFO L175 Difference]: Start difference. First operand has 264 places, 446 transitions, 8028 flow. Second operand 9 states and 163 transitions. [2024-06-28 04:25:00,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 492 transitions, 9643 flow [2024-06-28 04:25:01,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 492 transitions, 9310 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:01,178 INFO L231 Difference]: Finished difference. Result has 268 places, 464 transitions, 8607 flow [2024-06-28 04:25:01,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7697, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8607, PETRI_PLACES=268, PETRI_TRANSITIONS=464} [2024-06-28 04:25:01,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-28 04:25:01,179 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 464 transitions, 8607 flow [2024-06-28 04:25:01,179 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) [2024-06-28 04:25:01,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:01,179 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] [2024-06-28 04:25:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 04:25:01,179 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:01,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:01,179 INFO L85 PathProgramCache]: Analyzing trace with hash -692900542, now seen corresponding path program 4 times [2024-06-28 04:25:01,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:01,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096642093] [2024-06-28 04:25:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:01,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:04,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096642093] [2024-06-28 04:25:04,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096642093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:04,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:04,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:04,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550457667] [2024-06-28 04:25:04,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:04,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:04,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:04,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:04,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:04,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:25:04,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 464 transitions, 8607 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) [2024-06-28 04:25:04,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:04,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:25:04,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:06,624 INFO L124 PetriNetUnfolderBase]: 3509/5648 cut-off events. [2024-06-28 04:25:06,624 INFO L125 PetriNetUnfolderBase]: For 508993/508993 co-relation queries the response was YES. [2024-06-28 04:25:06,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58565 conditions, 5648 events. 3509/5648 cut-off events. For 508993/508993 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34782 event pairs, 730 based on Foata normal form. 2/5645 useless extension candidates. Maximal degree in co-relation 58436. Up to 5264 conditions per place. [2024-06-28 04:25:06,681 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 446 selfloop transitions, 45 changer transitions 0/496 dead transitions. [2024-06-28 04:25:06,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 496 transitions, 9970 flow [2024-06-28 04:25:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 04:25:06,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 04:25:06,682 INFO L175 Difference]: Start difference. First operand has 268 places, 464 transitions, 8607 flow. Second operand 9 states and 150 transitions. [2024-06-28 04:25:06,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 496 transitions, 9970 flow [2024-06-28 04:25:07,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 496 transitions, 9758 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-28 04:25:07,869 INFO L231 Difference]: Finished difference. Result has 274 places, 471 transitions, 8690 flow [2024-06-28 04:25:07,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8395, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8690, PETRI_PLACES=274, PETRI_TRANSITIONS=471} [2024-06-28 04:25:07,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-28 04:25:07,869 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 471 transitions, 8690 flow [2024-06-28 04:25:07,869 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) [2024-06-28 04:25:07,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:07,869 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] [2024-06-28 04:25:07,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 04:25:07,870 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)] === [2024-06-28 04:25:07,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash -137217062, now seen corresponding path program 5 times [2024-06-28 04:25:07,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:07,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141553580] [2024-06-28 04:25:07,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:07,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:11,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:11,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141553580] [2024-06-28 04:25:11,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141553580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:11,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:11,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:11,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835665746] [2024-06-28 04:25:11,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:11,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:11,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:11,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:11,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:11,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:25:11,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 471 transitions, 8690 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) [2024-06-28 04:25:11,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:11,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:25:11,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:12,998 INFO L124 PetriNetUnfolderBase]: 3499/5636 cut-off events. [2024-06-28 04:25:12,998 INFO L125 PetriNetUnfolderBase]: For 514536/514536 co-relation queries the response was YES. [2024-06-28 04:25:13,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58594 conditions, 5636 events. 3499/5636 cut-off events. For 514536/514536 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34768 event pairs, 736 based on Foata normal form. 2/5633 useless extension candidates. Maximal degree in co-relation 58462. Up to 5280 conditions per place. [2024-06-28 04:25:13,070 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 451 selfloop transitions, 35 changer transitions 0/491 dead transitions. [2024-06-28 04:25:13,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 491 transitions, 9728 flow [2024-06-28 04:25:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:25:13,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 04:25:13,071 INFO L175 Difference]: Start difference. First operand has 274 places, 471 transitions, 8690 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:25:13,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 491 transitions, 9728 flow [2024-06-28 04:25:14,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 491 transitions, 9529 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:14,263 INFO L231 Difference]: Finished difference. Result has 277 places, 471 transitions, 8568 flow [2024-06-28 04:25:14,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8491, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8568, PETRI_PLACES=277, PETRI_TRANSITIONS=471} [2024-06-28 04:25:14,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-28 04:25:14,264 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 471 transitions, 8568 flow [2024-06-28 04:25:14,264 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) [2024-06-28 04:25:14,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:14,264 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] [2024-06-28 04:25:14,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 04:25:14,264 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)] === [2024-06-28 04:25:14,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash -342241252, now seen corresponding path program 6 times [2024-06-28 04:25:14,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:14,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535390615] [2024-06-28 04:25:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:14,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:16,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:16,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535390615] [2024-06-28 04:25:16,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535390615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:16,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:16,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:16,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538790416] [2024-06-28 04:25:16,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:16,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:16,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:16,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:16,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:16,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:25:16,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 471 transitions, 8568 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) [2024-06-28 04:25:16,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:16,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:25:16,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:18,604 INFO L124 PetriNetUnfolderBase]: 3536/5692 cut-off events. [2024-06-28 04:25:18,604 INFO L125 PetriNetUnfolderBase]: For 524557/524557 co-relation queries the response was YES. [2024-06-28 04:25:18,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59262 conditions, 5692 events. 3536/5692 cut-off events. For 524557/524557 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 35165 event pairs, 740 based on Foata normal form. 1/5688 useless extension candidates. Maximal degree in co-relation 59129. Up to 5022 conditions per place. [2024-06-28 04:25:18,677 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 131 changer transitions 0/546 dead transitions. [2024-06-28 04:25:18,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 546 transitions, 11060 flow [2024-06-28 04:25:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:25:18,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 04:25:18,679 INFO L175 Difference]: Start difference. First operand has 277 places, 471 transitions, 8568 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:25:18,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 546 transitions, 11060 flow [2024-06-28 04:25:19,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 546 transitions, 10974 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 04:25:19,905 INFO L231 Difference]: Finished difference. Result has 281 places, 508 transitions, 9744 flow [2024-06-28 04:25:19,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8484, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9744, PETRI_PLACES=281, PETRI_TRANSITIONS=508} [2024-06-28 04:25:19,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-28 04:25:19,907 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 508 transitions, 9744 flow [2024-06-28 04:25:19,907 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) [2024-06-28 04:25:19,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:19,907 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] [2024-06-28 04:25:19,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 04:25:19,907 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)] === [2024-06-28 04:25:19,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:19,908 INFO L85 PathProgramCache]: Analyzing trace with hash -787014752, now seen corresponding path program 7 times [2024-06-28 04:25:19,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:19,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709990397] [2024-06-28 04:25:19,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:19,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:22,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:22,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709990397] [2024-06-28 04:25:22,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709990397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:22,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:22,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:22,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298657955] [2024-06-28 04:25:22,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:22,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:22,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:22,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:22,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:22,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:25:22,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 508 transitions, 9744 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) [2024-06-28 04:25:22,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:22,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:25:22,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:24,283 INFO L124 PetriNetUnfolderBase]: 3523/5672 cut-off events. [2024-06-28 04:25:24,283 INFO L125 PetriNetUnfolderBase]: For 541293/541293 co-relation queries the response was YES. [2024-06-28 04:25:24,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60270 conditions, 5672 events. 3523/5672 cut-off events. For 541293/541293 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 34963 event pairs, 744 based on Foata normal form. 3/5670 useless extension candidates. Maximal degree in co-relation 60133. Up to 5010 conditions per place. [2024-06-28 04:25:24,351 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 126 changer transitions 0/542 dead transitions. [2024-06-28 04:25:24,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 542 transitions, 11310 flow [2024-06-28 04:25:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:25:24,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 04:25:24,353 INFO L175 Difference]: Start difference. First operand has 281 places, 508 transitions, 9744 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:25:24,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 542 transitions, 11310 flow [2024-06-28 04:25:25,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 542 transitions, 11150 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-28 04:25:25,545 INFO L231 Difference]: Finished difference. Result has 287 places, 509 transitions, 9920 flow [2024-06-28 04:25:25,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9920, PETRI_PLACES=287, PETRI_TRANSITIONS=509} [2024-06-28 04:25:25,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-28 04:25:25,546 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 509 transitions, 9920 flow [2024-06-28 04:25:25,546 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) [2024-06-28 04:25:25,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:25,546 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] [2024-06-28 04:25:25,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 04:25:25,546 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)] === [2024-06-28 04:25:25,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash -338280382, now seen corresponding path program 8 times [2024-06-28 04:25:25,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:25,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308512331] [2024-06-28 04:25:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:25,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:28,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:28,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308512331] [2024-06-28 04:25:28,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308512331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:28,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:28,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:28,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111063495] [2024-06-28 04:25:28,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:28,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:28,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:28,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:28,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:28,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:25:28,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 509 transitions, 9920 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) [2024-06-28 04:25:28,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:28,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:25:28,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:30,700 INFO L124 PetriNetUnfolderBase]: 3538/5694 cut-off events. [2024-06-28 04:25:30,700 INFO L125 PetriNetUnfolderBase]: For 554366/554366 co-relation queries the response was YES. [2024-06-28 04:25:30,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61165 conditions, 5694 events. 3538/5694 cut-off events. For 554366/554366 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 35126 event pairs, 724 based on Foata normal form. 3/5692 useless extension candidates. Maximal degree in co-relation 61026. Up to 5199 conditions per place. [2024-06-28 04:25:30,772 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 464 selfloop transitions, 65 changer transitions 0/534 dead transitions. [2024-06-28 04:25:30,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 534 transitions, 11303 flow [2024-06-28 04:25:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:25:30,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 04:25:30,773 INFO L175 Difference]: Start difference. First operand has 287 places, 509 transitions, 9920 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:25:30,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 534 transitions, 11303 flow [2024-06-28 04:25:31,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 534 transitions, 11147 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-28 04:25:31,992 INFO L231 Difference]: Finished difference. Result has 292 places, 513 transitions, 9992 flow [2024-06-28 04:25:31,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9764, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9992, PETRI_PLACES=292, PETRI_TRANSITIONS=513} [2024-06-28 04:25:31,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-28 04:25:31,993 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 513 transitions, 9992 flow [2024-06-28 04:25:31,993 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) [2024-06-28 04:25:31,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:31,993 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] [2024-06-28 04:25:31,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 04:25:31,994 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:31,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:31,994 INFO L85 PathProgramCache]: Analyzing trace with hash -338547292, now seen corresponding path program 9 times [2024-06-28 04:25:31,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:31,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738470639] [2024-06-28 04:25:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:31,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:35,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:35,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738470639] [2024-06-28 04:25:35,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738470639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:35,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:35,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:35,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712801345] [2024-06-28 04:25:35,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:35,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:35,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:35,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:35,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:25:35,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 513 transitions, 9992 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) [2024-06-28 04:25:35,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:35,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:25:35,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:37,131 INFO L124 PetriNetUnfolderBase]: 3525/5678 cut-off events. [2024-06-28 04:25:37,131 INFO L125 PetriNetUnfolderBase]: For 558572/558572 co-relation queries the response was YES. [2024-06-28 04:25:37,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60792 conditions, 5678 events. 3525/5678 cut-off events. For 558572/558572 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 35064 event pairs, 726 based on Foata normal form. 3/5676 useless extension candidates. Maximal degree in co-relation 60652. Up to 5267 conditions per place. [2024-06-28 04:25:37,205 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 480 selfloop transitions, 47 changer transitions 0/532 dead transitions. [2024-06-28 04:25:37,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 532 transitions, 11138 flow [2024-06-28 04:25:37,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:37,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:25:37,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 04:25:37,206 INFO L175 Difference]: Start difference. First operand has 292 places, 513 transitions, 9992 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:25:37,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 532 transitions, 11138 flow [2024-06-28 04:25:38,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 532 transitions, 10912 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:38,442 INFO L231 Difference]: Finished difference. Result has 294 places, 513 transitions, 9867 flow [2024-06-28 04:25:38,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9766, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9867, PETRI_PLACES=294, PETRI_TRANSITIONS=513} [2024-06-28 04:25:38,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-28 04:25:38,443 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 513 transitions, 9867 flow [2024-06-28 04:25:38,443 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) [2024-06-28 04:25:38,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:38,443 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] [2024-06-28 04:25:38,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 04:25:38,444 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:38,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1107521032, now seen corresponding path program 10 times [2024-06-28 04:25:38,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:38,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730905952] [2024-06-28 04:25:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:38,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:41,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730905952] [2024-06-28 04:25:41,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730905952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:41,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:41,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:41,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807601248] [2024-06-28 04:25:41,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:41,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:41,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:41,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:25:41,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 513 transitions, 9867 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) [2024-06-28 04:25:41,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:41,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:25:41,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:42,963 INFO L124 PetriNetUnfolderBase]: 3541/5684 cut-off events. [2024-06-28 04:25:42,964 INFO L125 PetriNetUnfolderBase]: For 574539/574539 co-relation queries the response was YES. [2024-06-28 04:25:43,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60773 conditions, 5684 events. 3541/5684 cut-off events. For 574539/574539 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 34987 event pairs, 703 based on Foata normal form. 8/5682 useless extension candidates. Maximal degree in co-relation 60632. Up to 5079 conditions per place. [2024-06-28 04:25:43,038 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 392 selfloop transitions, 144 changer transitions 0/541 dead transitions. [2024-06-28 04:25:43,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 541 transitions, 11496 flow [2024-06-28 04:25:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:25:43,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:25:43,039 INFO L175 Difference]: Start difference. First operand has 294 places, 513 transitions, 9867 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:25:43,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 541 transitions, 11496 flow [2024-06-28 04:25:44,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 541 transitions, 11362 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 04:25:44,348 INFO L231 Difference]: Finished difference. Result has 295 places, 523 transitions, 10358 flow [2024-06-28 04:25:44,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9733, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10358, PETRI_PLACES=295, PETRI_TRANSITIONS=523} [2024-06-28 04:25:44,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-28 04:25:44,349 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 523 transitions, 10358 flow [2024-06-28 04:25:44,349 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) [2024-06-28 04:25:44,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:44,349 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] [2024-06-28 04:25:44,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 04:25:44,349 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:44,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:44,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1421263968, now seen corresponding path program 11 times [2024-06-28 04:25:44,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:44,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980917741] [2024-06-28 04:25:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:44,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:46,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:46,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980917741] [2024-06-28 04:25:46,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980917741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:46,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:46,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:46,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262272807] [2024-06-28 04:25:46,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:46,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:46,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:46,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:46,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:46,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:25:46,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 523 transitions, 10358 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) [2024-06-28 04:25:46,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:46,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:25:46,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:48,569 INFO L124 PetriNetUnfolderBase]: 3610/5780 cut-off events. [2024-06-28 04:25:48,569 INFO L125 PetriNetUnfolderBase]: For 590314/590314 co-relation queries the response was YES. [2024-06-28 04:25:48,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62882 conditions, 5780 events. 3610/5780 cut-off events. For 590314/590314 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35533 event pairs, 707 based on Foata normal form. 4/5774 useless extension candidates. Maximal degree in co-relation 62741. Up to 5094 conditions per place. [2024-06-28 04:25:48,634 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 388 selfloop transitions, 175 changer transitions 0/568 dead transitions. [2024-06-28 04:25:48,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 568 transitions, 12520 flow [2024-06-28 04:25:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:48,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 04:25:48,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 04:25:48,635 INFO L175 Difference]: Start difference. First operand has 295 places, 523 transitions, 10358 flow. Second operand 9 states and 150 transitions. [2024-06-28 04:25:48,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 568 transitions, 12520 flow [2024-06-28 04:25:49,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 568 transitions, 11950 flow, removed 182 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:49,914 INFO L231 Difference]: Finished difference. Result has 302 places, 549 transitions, 11021 flow [2024-06-28 04:25:49,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9825, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11021, PETRI_PLACES=302, PETRI_TRANSITIONS=549} [2024-06-28 04:25:49,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-28 04:25:49,914 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 549 transitions, 11021 flow [2024-06-28 04:25:49,914 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) [2024-06-28 04:25:49,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:49,914 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] [2024-06-28 04:25:49,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 04:25:49,914 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:49,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:49,915 INFO L85 PathProgramCache]: Analyzing trace with hash -426295900, now seen corresponding path program 12 times [2024-06-28 04:25:49,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:49,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020553122] [2024-06-28 04:25:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:49,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:52,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:52,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020553122] [2024-06-28 04:25:52,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020553122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:52,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:52,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:52,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170216548] [2024-06-28 04:25:52,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:52,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:52,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:52,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:52,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:52,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:25:52,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 549 transitions, 11021 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) [2024-06-28 04:25:52,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:52,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:25:52,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:54,581 INFO L124 PetriNetUnfolderBase]: 3583/5743 cut-off events. [2024-06-28 04:25:54,581 INFO L125 PetriNetUnfolderBase]: For 601147/601147 co-relation queries the response was YES. [2024-06-28 04:25:54,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62530 conditions, 5743 events. 3583/5743 cut-off events. For 601147/601147 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35302 event pairs, 706 based on Foata normal form. 9/5742 useless extension candidates. Maximal degree in co-relation 62385. Up to 5308 conditions per place. [2024-06-28 04:25:54,644 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 489 selfloop transitions, 73 changer transitions 0/567 dead transitions. [2024-06-28 04:25:54,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 567 transitions, 12316 flow [2024-06-28 04:25:54,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 04:25:54,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-28 04:25:54,645 INFO L175 Difference]: Start difference. First operand has 302 places, 549 transitions, 11021 flow. Second operand 9 states and 143 transitions. [2024-06-28 04:25:54,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 567 transitions, 12316 flow [2024-06-28 04:25:56,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 567 transitions, 12061 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:56,077 INFO L231 Difference]: Finished difference. Result has 306 places, 552 transitions, 11036 flow [2024-06-28 04:25:56,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10766, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11036, PETRI_PLACES=306, PETRI_TRANSITIONS=552} [2024-06-28 04:25:56,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-28 04:25:56,077 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 552 transitions, 11036 flow [2024-06-28 04:25:56,078 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) [2024-06-28 04:25:56,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:56,078 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] [2024-06-28 04:25:56,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 04:25:56,078 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:56,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:56,078 INFO L85 PathProgramCache]: Analyzing trace with hash -12298309, now seen corresponding path program 1 times [2024-06-28 04:25:56,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:56,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433192751] [2024-06-28 04:25:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:56,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:58,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:58,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433192751] [2024-06-28 04:25:58,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433192751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:58,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:58,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:25:58,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087586658] [2024-06-28 04:25:58,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:58,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:25:58,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:58,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:25:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:25:58,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:25:58,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 552 transitions, 11036 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:58,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:58,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:25:58,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:00,405 INFO L124 PetriNetUnfolderBase]: 3670/5878 cut-off events. [2024-06-28 04:26:00,406 INFO L125 PetriNetUnfolderBase]: For 641525/641525 co-relation queries the response was YES. [2024-06-28 04:26:00,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64303 conditions, 5878 events. 3670/5878 cut-off events. For 641525/641525 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 36210 event pairs, 711 based on Foata normal form. 8/5876 useless extension candidates. Maximal degree in co-relation 64157. Up to 5285 conditions per place. [2024-06-28 04:26:00,476 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 510 selfloop transitions, 62 changer transitions 0/577 dead transitions. [2024-06-28 04:26:00,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 577 transitions, 12652 flow [2024-06-28 04:26:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:26:00,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 04:26:00,478 INFO L175 Difference]: Start difference. First operand has 306 places, 552 transitions, 11036 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:26:00,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 577 transitions, 12652 flow [2024-06-28 04:26:02,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 577 transitions, 12356 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-06-28 04:26:02,284 INFO L231 Difference]: Finished difference. Result has 309 places, 554 transitions, 10928 flow [2024-06-28 04:26:02,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10740, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10928, PETRI_PLACES=309, PETRI_TRANSITIONS=554} [2024-06-28 04:26:02,284 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-28 04:26:02,284 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 554 transitions, 10928 flow [2024-06-28 04:26:02,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:02,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:02,285 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] [2024-06-28 04:26:02,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 04:26:02,285 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)] === [2024-06-28 04:26:02,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash -26583109, now seen corresponding path program 2 times [2024-06-28 04:26:02,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:02,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320964115] [2024-06-28 04:26:02,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:02,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:04,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:04,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320964115] [2024-06-28 04:26:04,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320964115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:04,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:04,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:26:04,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240101248] [2024-06-28 04:26:04,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:04,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:26:04,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:04,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:26:04,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:26:04,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:26:04,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 554 transitions, 10928 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) [2024-06-28 04:26:04,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:04,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:26:04,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:07,163 INFO L124 PetriNetUnfolderBase]: 3696/5922 cut-off events. [2024-06-28 04:26:07,163 INFO L125 PetriNetUnfolderBase]: For 660416/660416 co-relation queries the response was YES. [2024-06-28 04:26:07,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64126 conditions, 5922 events. 3696/5922 cut-off events. For 660416/660416 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36492 event pairs, 735 based on Foata normal form. 14/5926 useless extension candidates. Maximal degree in co-relation 63979. Up to 5460 conditions per place. [2024-06-28 04:26:07,238 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 507 selfloop transitions, 62 changer transitions 0/574 dead transitions. [2024-06-28 04:26:07,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 574 transitions, 12292 flow [2024-06-28 04:26:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:26:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:26:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:26:07,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 04:26:07,240 INFO L175 Difference]: Start difference. First operand has 309 places, 554 transitions, 10928 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:26:07,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 574 transitions, 12292 flow [2024-06-28 04:26:09,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 574 transitions, 12212 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 04:26:09,047 INFO L231 Difference]: Finished difference. Result has 312 places, 556 transitions, 11049 flow [2024-06-28 04:26:09,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10848, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11049, PETRI_PLACES=312, PETRI_TRANSITIONS=556} [2024-06-28 04:26:09,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-28 04:26:09,047 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 556 transitions, 11049 flow [2024-06-28 04:26:09,048 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) [2024-06-28 04:26:09,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:09,048 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] [2024-06-28 04:26:09,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 04:26:09,048 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)] === [2024-06-28 04:26:09,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:09,048 INFO L85 PathProgramCache]: Analyzing trace with hash -788878689, now seen corresponding path program 1 times [2024-06-28 04:26:09,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:09,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726321097] [2024-06-28 04:26:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:09,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:11,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:11,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726321097] [2024-06-28 04:26:11,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726321097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:11,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:11,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:11,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439807010] [2024-06-28 04:26:11,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:11,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:11,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:11,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:11,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:11,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:26:11,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 556 transitions, 11049 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) [2024-06-28 04:26:11,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:11,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:26:11,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:14,203 INFO L124 PetriNetUnfolderBase]: 3952/6340 cut-off events. [2024-06-28 04:26:14,203 INFO L125 PetriNetUnfolderBase]: For 784244/784244 co-relation queries the response was YES. [2024-06-28 04:26:14,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71211 conditions, 6340 events. 3952/6340 cut-off events. For 784244/784244 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 39749 event pairs, 737 based on Foata normal form. 16/6351 useless extension candidates. Maximal degree in co-relation 71062. Up to 5085 conditions per place. [2024-06-28 04:26:14,285 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 472 selfloop transitions, 139 changer transitions 0/616 dead transitions. [2024-06-28 04:26:14,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 616 transitions, 13553 flow [2024-06-28 04:26:14,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:14,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:14,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 04:26:14,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 04:26:14,286 INFO L175 Difference]: Start difference. First operand has 312 places, 556 transitions, 11049 flow. Second operand 9 states and 172 transitions. [2024-06-28 04:26:14,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 616 transitions, 13553 flow [2024-06-28 04:26:16,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 616 transitions, 13417 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 04:26:16,045 INFO L231 Difference]: Finished difference. Result has 319 places, 563 transitions, 11489 flow [2024-06-28 04:26:16,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10913, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11489, PETRI_PLACES=319, PETRI_TRANSITIONS=563} [2024-06-28 04:26:16,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-28 04:26:16,046 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 563 transitions, 11489 flow [2024-06-28 04:26:16,046 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) [2024-06-28 04:26:16,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:16,047 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] [2024-06-28 04:26:16,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 04:26:16,047 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)] === [2024-06-28 04:26:16,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:16,047 INFO L85 PathProgramCache]: Analyzing trace with hash -787004739, now seen corresponding path program 2 times [2024-06-28 04:26:16,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:16,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811453066] [2024-06-28 04:26:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:16,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:18,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:18,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811453066] [2024-06-28 04:26:18,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811453066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:18,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:18,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:18,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060240125] [2024-06-28 04:26:18,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:18,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:18,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:18,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:18,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:18,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:26:18,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 563 transitions, 11489 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) [2024-06-28 04:26:18,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:18,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:26:18,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:20,992 INFO L124 PetriNetUnfolderBase]: 4149/6639 cut-off events. [2024-06-28 04:26:20,992 INFO L125 PetriNetUnfolderBase]: For 889835/889835 co-relation queries the response was YES. [2024-06-28 04:26:21,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77300 conditions, 6639 events. 4149/6639 cut-off events. For 889835/889835 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41927 event pairs, 893 based on Foata normal form. 16/6650 useless extension candidates. Maximal degree in co-relation 77148. Up to 5699 conditions per place. [2024-06-28 04:26:21,080 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 473 selfloop transitions, 133 changer transitions 0/611 dead transitions. [2024-06-28 04:26:21,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 611 transitions, 13688 flow [2024-06-28 04:26:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:21,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 04:26:21,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 04:26:21,081 INFO L175 Difference]: Start difference. First operand has 319 places, 563 transitions, 11489 flow. Second operand 9 states and 165 transitions. [2024-06-28 04:26:21,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 611 transitions, 13688 flow [2024-06-28 04:26:23,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 611 transitions, 13452 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-28 04:26:23,076 INFO L231 Difference]: Finished difference. Result has 325 places, 567 transitions, 11703 flow [2024-06-28 04:26:23,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11257, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11703, PETRI_PLACES=325, PETRI_TRANSITIONS=567} [2024-06-28 04:26:23,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-28 04:26:23,077 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 567 transitions, 11703 flow [2024-06-28 04:26:23,077 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) [2024-06-28 04:26:23,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:23,077 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] [2024-06-28 04:26:23,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 04:26:23,077 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)] === [2024-06-28 04:26:23,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:23,077 INFO L85 PathProgramCache]: Analyzing trace with hash -787001019, now seen corresponding path program 3 times [2024-06-28 04:26:23,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:23,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018615588] [2024-06-28 04:26:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:23,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:25,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:25,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018615588] [2024-06-28 04:26:25,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018615588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:25,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:25,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:25,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417414147] [2024-06-28 04:26:25,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:25,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:25,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:25,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:25,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:25,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:26:25,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 567 transitions, 11703 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) [2024-06-28 04:26:25,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:25,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:26:25,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:28,107 INFO L124 PetriNetUnfolderBase]: 4162/6672 cut-off events. [2024-06-28 04:26:28,107 INFO L125 PetriNetUnfolderBase]: For 884954/884954 co-relation queries the response was YES. [2024-06-28 04:26:28,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77060 conditions, 6672 events. 4162/6672 cut-off events. For 884954/884954 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 42149 event pairs, 912 based on Foata normal form. 20/6687 useless extension candidates. Maximal degree in co-relation 76905. Up to 5921 conditions per place. [2024-06-28 04:26:28,196 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 467 selfloop transitions, 136 changer transitions 0/608 dead transitions. [2024-06-28 04:26:28,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 608 transitions, 13594 flow [2024-06-28 04:26:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 04:26:28,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:26:28,197 INFO L175 Difference]: Start difference. First operand has 325 places, 567 transitions, 11703 flow. Second operand 9 states and 162 transitions. [2024-06-28 04:26:28,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 608 transitions, 13594 flow [2024-06-28 04:26:30,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 608 transitions, 13423 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-28 04:26:30,604 INFO L231 Difference]: Finished difference. Result has 331 places, 570 transitions, 11936 flow [2024-06-28 04:26:30,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11532, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11936, PETRI_PLACES=331, PETRI_TRANSITIONS=570} [2024-06-28 04:26:30,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-28 04:26:30,605 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 570 transitions, 11936 flow [2024-06-28 04:26:30,605 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) [2024-06-28 04:26:30,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:30,605 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] [2024-06-28 04:26:30,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 04:26:30,605 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)] === [2024-06-28 04:26:30,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:30,605 INFO L85 PathProgramCache]: Analyzing trace with hash -700165059, now seen corresponding path program 4 times [2024-06-28 04:26:30,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:30,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237743281] [2024-06-28 04:26:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:30,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:33,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:33,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237743281] [2024-06-28 04:26:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237743281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:33,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:33,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:33,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766986899] [2024-06-28 04:26:33,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:33,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:33,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:33,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:33,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:33,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:26:33,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 570 transitions, 11936 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) [2024-06-28 04:26:33,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:33,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:26:33,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:35,904 INFO L124 PetriNetUnfolderBase]: 4377/7023 cut-off events. [2024-06-28 04:26:35,904 INFO L125 PetriNetUnfolderBase]: For 1057816/1057816 co-relation queries the response was YES. [2024-06-28 04:26:35,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80687 conditions, 7023 events. 4377/7023 cut-off events. For 1057816/1057816 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 44588 event pairs, 941 based on Foata normal form. 68/7086 useless extension candidates. Maximal degree in co-relation 80529. Up to 6227 conditions per place. [2024-06-28 04:26:35,999 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 541 selfloop transitions, 50 changer transitions 4/600 dead transitions. [2024-06-28 04:26:35,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 600 transitions, 13474 flow [2024-06-28 04:26:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 04:26:36,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 04:26:36,000 INFO L175 Difference]: Start difference. First operand has 331 places, 570 transitions, 11936 flow. Second operand 9 states and 155 transitions. [2024-06-28 04:26:36,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 600 transitions, 13474 flow [2024-06-28 04:26:38,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 600 transitions, 13183 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 04:26:38,241 INFO L231 Difference]: Finished difference. Result has 335 places, 570 transitions, 11825 flow [2024-06-28 04:26:38,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11645, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11825, PETRI_PLACES=335, PETRI_TRANSITIONS=570} [2024-06-28 04:26:38,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-28 04:26:38,241 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 570 transitions, 11825 flow [2024-06-28 04:26:38,242 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) [2024-06-28 04:26:38,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:38,242 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] [2024-06-28 04:26:38,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 04:26:38,242 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:38,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:38,242 INFO L85 PathProgramCache]: Analyzing trace with hash -124971969, now seen corresponding path program 5 times [2024-06-28 04:26:38,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:38,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686114627] [2024-06-28 04:26:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:38,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:43,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:43,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686114627] [2024-06-28 04:26:43,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686114627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:43,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:43,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:43,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109281746] [2024-06-28 04:26:43,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:43,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:43,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:43,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:43,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:26:43,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 570 transitions, 11825 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) [2024-06-28 04:26:43,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:43,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:26:43,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:46,577 INFO L124 PetriNetUnfolderBase]: 4537/7279 cut-off events. [2024-06-28 04:26:46,577 INFO L125 PetriNetUnfolderBase]: For 1077414/1077414 co-relation queries the response was YES. [2024-06-28 04:26:46,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82715 conditions, 7279 events. 4537/7279 cut-off events. For 1077414/1077414 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 46398 event pairs, 990 based on Foata normal form. 68/7337 useless extension candidates. Maximal degree in co-relation 82556. Up to 5815 conditions per place. [2024-06-28 04:26:46,666 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 431 selfloop transitions, 154 changer transitions 13/603 dead transitions. [2024-06-28 04:26:46,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 603 transitions, 13403 flow [2024-06-28 04:26:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:26:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:26:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 04:26:46,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-28 04:26:46,667 INFO L175 Difference]: Start difference. First operand has 335 places, 570 transitions, 11825 flow. Second operand 10 states and 179 transitions. [2024-06-28 04:26:46,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 603 transitions, 13403 flow [2024-06-28 04:26:48,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 603 transitions, 13186 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-28 04:26:48,971 INFO L231 Difference]: Finished difference. Result has 340 places, 561 transitions, 11942 flow [2024-06-28 04:26:48,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11608, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11942, PETRI_PLACES=340, PETRI_TRANSITIONS=561} [2024-06-28 04:26:48,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-28 04:26:48,972 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 561 transitions, 11942 flow [2024-06-28 04:26:48,972 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) [2024-06-28 04:26:48,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:48,972 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] [2024-06-28 04:26:48,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 04:26:48,972 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:48,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash -124975689, now seen corresponding path program 6 times [2024-06-28 04:26:48,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:48,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413275205] [2024-06-28 04:26:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:48,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:53,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:53,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413275205] [2024-06-28 04:26:53,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413275205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:53,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:53,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:53,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271822312] [2024-06-28 04:26:53,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:53,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:53,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:53,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:53,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:53,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:26:53,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 561 transitions, 11942 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) [2024-06-28 04:26:53,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:53,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:26:53,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:55,888 INFO L124 PetriNetUnfolderBase]: 4747/7671 cut-off events. [2024-06-28 04:26:55,888 INFO L125 PetriNetUnfolderBase]: For 1151194/1151194 co-relation queries the response was YES. [2024-06-28 04:26:55,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88022 conditions, 7671 events. 4747/7671 cut-off events. For 1151194/1151194 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 49569 event pairs, 1006 based on Foata normal form. 56/7722 useless extension candidates. Maximal degree in co-relation 87860. Up to 5982 conditions per place. [2024-06-28 04:26:55,988 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 531 selfloop transitions, 65 changer transitions 1/602 dead transitions. [2024-06-28 04:26:55,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 602 transitions, 13897 flow [2024-06-28 04:26:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 04:26:55,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:26:55,989 INFO L175 Difference]: Start difference. First operand has 340 places, 561 transitions, 11942 flow. Second operand 9 states and 162 transitions. [2024-06-28 04:26:55,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 602 transitions, 13897 flow [2024-06-28 04:26:58,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 602 transitions, 13467 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-06-28 04:26:58,591 INFO L231 Difference]: Finished difference. Result has 339 places, 565 transitions, 11860 flow [2024-06-28 04:26:58,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11525, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11860, PETRI_PLACES=339, PETRI_TRANSITIONS=565} [2024-06-28 04:26:58,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-28 04:26:58,591 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 565 transitions, 11860 flow [2024-06-28 04:26:58,592 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) [2024-06-28 04:26:58,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:58,592 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] [2024-06-28 04:26:58,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 04:26:58,592 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:58,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:58,592 INFO L85 PathProgramCache]: Analyzing trace with hash -12558492, now seen corresponding path program 1 times [2024-06-28 04:26:58,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:58,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623151149] [2024-06-28 04:26:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:58,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:01,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:01,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623151149] [2024-06-28 04:27:01,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623151149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:01,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:01,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:01,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002408705] [2024-06-28 04:27:01,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:01,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:01,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:01,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:01,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:01,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:27:01,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 565 transitions, 11860 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) [2024-06-28 04:27:01,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:01,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:27:01,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:03,992 INFO L124 PetriNetUnfolderBase]: 4744/7632 cut-off events. [2024-06-28 04:27:03,992 INFO L125 PetriNetUnfolderBase]: For 955668/955668 co-relation queries the response was YES. [2024-06-28 04:27:04,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86933 conditions, 7632 events. 4744/7632 cut-off events. For 955668/955668 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 49099 event pairs, 1209 based on Foata normal form. 3/7625 useless extension candidates. Maximal degree in co-relation 86770. Up to 7165 conditions per place. [2024-06-28 04:27:04,090 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 486 selfloop transitions, 93 changer transitions 0/584 dead transitions. [2024-06-28 04:27:04,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 584 transitions, 13191 flow [2024-06-28 04:27:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:27:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:27:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-28 04:27:04,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-28 04:27:04,092 INFO L175 Difference]: Start difference. First operand has 339 places, 565 transitions, 11860 flow. Second operand 10 states and 159 transitions. [2024-06-28 04:27:04,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 584 transitions, 13191 flow [2024-06-28 04:27:06,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 584 transitions, 13042 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:06,351 INFO L231 Difference]: Finished difference. Result has 345 places, 569 transitions, 12071 flow [2024-06-28 04:27:06,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11711, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12071, PETRI_PLACES=345, PETRI_TRANSITIONS=569} [2024-06-28 04:27:06,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 04:27:06,351 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 569 transitions, 12071 flow [2024-06-28 04:27:06,351 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) [2024-06-28 04:27:06,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:06,352 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] [2024-06-28 04:27:06,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 04:27:06,352 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:06,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:06,352 INFO L85 PathProgramCache]: Analyzing trace with hash -19915877, now seen corresponding path program 7 times [2024-06-28 04:27:06,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:06,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245898380] [2024-06-28 04:27:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:06,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:08,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:08,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245898380] [2024-06-28 04:27:08,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245898380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:08,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:08,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:08,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929129513] [2024-06-28 04:27:08,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:08,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:08,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:08,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:08,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:08,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:27:08,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 569 transitions, 12071 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) [2024-06-28 04:27:08,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:08,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:27:08,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:11,630 INFO L124 PetriNetUnfolderBase]: 4920/7910 cut-off events. [2024-06-28 04:27:11,630 INFO L125 PetriNetUnfolderBase]: For 1144840/1144840 co-relation queries the response was YES. [2024-06-28 04:27:11,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89463 conditions, 7910 events. 4920/7910 cut-off events. For 1144840/1144840 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 51134 event pairs, 1259 based on Foata normal form. 54/7954 useless extension candidates. Maximal degree in co-relation 89297. Up to 7169 conditions per place. [2024-06-28 04:27:11,731 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 492 selfloop transitions, 86 changer transitions 11/594 dead transitions. [2024-06-28 04:27:11,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 594 transitions, 13528 flow [2024-06-28 04:27:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:27:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:27:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-28 04:27:11,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-28 04:27:11,732 INFO L175 Difference]: Start difference. First operand has 345 places, 569 transitions, 12071 flow. Second operand 11 states and 177 transitions. [2024-06-28 04:27:11,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 594 transitions, 13528 flow [2024-06-28 04:27:14,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 594 transitions, 13189 flow, removed 99 selfloop flow, removed 6 redundant places. [2024-06-28 04:27:14,380 INFO L231 Difference]: Finished difference. Result has 350 places, 562 transitions, 11817 flow [2024-06-28 04:27:14,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11732, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11817, PETRI_PLACES=350, PETRI_TRANSITIONS=562} [2024-06-28 04:27:14,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-28 04:27:14,381 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 562 transitions, 11817 flow [2024-06-28 04:27:14,381 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) [2024-06-28 04:27:14,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:14,382 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] [2024-06-28 04:27:14,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 04:27:14,382 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:14,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1415737753, now seen corresponding path program 1 times [2024-06-28 04:27:14,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:14,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589570930] [2024-06-28 04:27:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:14,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:17,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:17,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589570930] [2024-06-28 04:27:17,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589570930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:17,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:17,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:17,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123668059] [2024-06-28 04:27:17,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:17,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:17,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:17,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:17,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:27:17,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 562 transitions, 11817 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) [2024-06-28 04:27:17,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:17,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:27:17,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:20,418 INFO L124 PetriNetUnfolderBase]: 4811/7753 cut-off events. [2024-06-28 04:27:20,418 INFO L125 PetriNetUnfolderBase]: For 1017418/1017418 co-relation queries the response was YES. [2024-06-28 04:27:20,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87542 conditions, 7753 events. 4811/7753 cut-off events. For 1017418/1017418 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 50159 event pairs, 1205 based on Foata normal form. 18/7769 useless extension candidates. Maximal degree in co-relation 87375. Up to 7249 conditions per place. [2024-06-28 04:27:20,510 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 524 selfloop transitions, 67 changer transitions 0/596 dead transitions. [2024-06-28 04:27:20,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 596 transitions, 13350 flow [2024-06-28 04:27:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:27:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:27:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-28 04:27:20,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:27:20,511 INFO L175 Difference]: Start difference. First operand has 350 places, 562 transitions, 11817 flow. Second operand 11 states and 176 transitions. [2024-06-28 04:27:20,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 596 transitions, 13350 flow [2024-06-28 04:27:23,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 596 transitions, 13057 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-28 04:27:23,051 INFO L231 Difference]: Finished difference. Result has 352 places, 567 transitions, 11848 flow [2024-06-28 04:27:23,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11530, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11848, PETRI_PLACES=352, PETRI_TRANSITIONS=567} [2024-06-28 04:27:23,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-28 04:27:23,052 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 567 transitions, 11848 flow [2024-06-28 04:27:23,052 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) [2024-06-28 04:27:23,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:23,052 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] [2024-06-28 04:27:23,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 04:27:23,052 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:23,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1421253955, now seen corresponding path program 8 times [2024-06-28 04:27:23,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:23,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746352961] [2024-06-28 04:27:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:23,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:25,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:25,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746352961] [2024-06-28 04:27:25,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746352961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:25,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:25,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:25,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292042763] [2024-06-28 04:27:25,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:25,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:25,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:25,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:25,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:25,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:27:25,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 567 transitions, 11848 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) [2024-06-28 04:27:25,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:25,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:27:25,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:28,893 INFO L124 PetriNetUnfolderBase]: 5354/8619 cut-off events. [2024-06-28 04:27:28,893 INFO L125 PetriNetUnfolderBase]: For 1375899/1375899 co-relation queries the response was YES. [2024-06-28 04:27:28,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100227 conditions, 8619 events. 5354/8619 cut-off events. For 1375899/1375899 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 56472 event pairs, 1161 based on Foata normal form. 48/8657 useless extension candidates. Maximal degree in co-relation 100059. Up to 6075 conditions per place. [2024-06-28 04:27:29,007 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 354 selfloop transitions, 282 changer transitions 0/641 dead transitions. [2024-06-28 04:27:29,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 641 transitions, 15088 flow [2024-06-28 04:27:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:27:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:27:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-28 04:27:29,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 04:27:29,008 INFO L175 Difference]: Start difference. First operand has 352 places, 567 transitions, 11848 flow. Second operand 10 states and 185 transitions. [2024-06-28 04:27:29,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 641 transitions, 15088 flow [2024-06-28 04:27:31,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 641 transitions, 14889 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-28 04:27:31,888 INFO L231 Difference]: Finished difference. Result has 358 places, 597 transitions, 13327 flow [2024-06-28 04:27:31,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11672, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13327, PETRI_PLACES=358, PETRI_TRANSITIONS=597} [2024-06-28 04:27:31,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-28 04:27:31,889 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 597 transitions, 13327 flow [2024-06-28 04:27:31,889 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) [2024-06-28 04:27:31,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:31,889 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] [2024-06-28 04:27:31,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 04:27:31,889 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:31,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:31,890 INFO L85 PathProgramCache]: Analyzing trace with hash -12558275, now seen corresponding path program 2 times [2024-06-28 04:27:31,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:31,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178561828] [2024-06-28 04:27:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:31,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:34,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:34,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178561828] [2024-06-28 04:27:34,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178561828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:34,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:34,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24972082] [2024-06-28 04:27:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:34,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:34,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:34,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:34,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:27:34,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 597 transitions, 13327 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) [2024-06-28 04:27:34,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:34,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:27:34,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:38,136 INFO L124 PetriNetUnfolderBase]: 5409/8704 cut-off events. [2024-06-28 04:27:38,136 INFO L125 PetriNetUnfolderBase]: For 1311392/1311392 co-relation queries the response was YES. [2024-06-28 04:27:38,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104312 conditions, 8704 events. 5409/8704 cut-off events. For 1311392/1311392 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 56954 event pairs, 1474 based on Foata normal form. 18/8712 useless extension candidates. Maximal degree in co-relation 104140. Up to 8051 conditions per place. [2024-06-28 04:27:38,257 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 521 selfloop transitions, 98 changer transitions 0/624 dead transitions. [2024-06-28 04:27:38,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 624 transitions, 14999 flow [2024-06-28 04:27:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:27:38,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:27:38,258 INFO L175 Difference]: Start difference. First operand has 358 places, 597 transitions, 13327 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:27:38,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 624 transitions, 14999 flow [2024-06-28 04:27:41,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 624 transitions, 14374 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-28 04:27:41,985 INFO L231 Difference]: Finished difference. Result has 359 places, 601 transitions, 13108 flow [2024-06-28 04:27:41,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12706, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13108, PETRI_PLACES=359, PETRI_TRANSITIONS=601} [2024-06-28 04:27:41,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-28 04:27:41,986 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 601 transitions, 13108 flow [2024-06-28 04:27:41,986 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) [2024-06-28 04:27:41,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:41,986 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] [2024-06-28 04:27:41,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 04:27:41,986 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:41,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:41,987 INFO L85 PathProgramCache]: Analyzing trace with hash -12291365, now seen corresponding path program 3 times [2024-06-28 04:27:41,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:41,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463757389] [2024-06-28 04:27:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:41,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:44,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:44,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463757389] [2024-06-28 04:27:44,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463757389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:44,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:44,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:44,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509467823] [2024-06-28 04:27:44,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:44,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:44,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:44,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:44,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:44,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:27:44,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 601 transitions, 13108 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) [2024-06-28 04:27:44,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:44,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:27:44,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:47,949 INFO L124 PetriNetUnfolderBase]: 5504/8869 cut-off events. [2024-06-28 04:27:47,949 INFO L125 PetriNetUnfolderBase]: For 1327754/1327754 co-relation queries the response was YES. [2024-06-28 04:27:48,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104501 conditions, 8869 events. 5504/8869 cut-off events. For 1327754/1327754 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 58428 event pairs, 1463 based on Foata normal form. 22/8881 useless extension candidates. Maximal degree in co-relation 104330. Up to 8272 conditions per place. [2024-06-28 04:27:48,077 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 553 selfloop transitions, 72 changer transitions 0/630 dead transitions. [2024-06-28 04:27:48,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 630 transitions, 14820 flow [2024-06-28 04:27:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:27:48,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 04:27:48,078 INFO L175 Difference]: Start difference. First operand has 359 places, 601 transitions, 13108 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:27:48,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 630 transitions, 14820 flow [2024-06-28 04:27:51,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 630 transitions, 14535 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-28 04:27:51,259 INFO L231 Difference]: Finished difference. Result has 362 places, 606 transitions, 13157 flow [2024-06-28 04:27:51,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12823, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13157, PETRI_PLACES=362, PETRI_TRANSITIONS=606} [2024-06-28 04:27:51,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-28 04:27:51,260 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 606 transitions, 13157 flow [2024-06-28 04:27:51,260 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) [2024-06-28 04:27:51,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:51,261 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] [2024-06-28 04:27:51,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:27:51,261 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:51,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:51,261 INFO L85 PathProgramCache]: Analyzing trace with hash -219361817, now seen corresponding path program 9 times [2024-06-28 04:27:51,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:51,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336335176] [2024-06-28 04:27:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:51,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:53,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:53,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336335176] [2024-06-28 04:27:53,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336335176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:53,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:53,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:53,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490100581] [2024-06-28 04:27:53,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:53,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:53,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:53,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:53,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:27:53,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 606 transitions, 13157 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) [2024-06-28 04:27:53,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:53,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:27:53,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:57,205 INFO L124 PetriNetUnfolderBase]: 5680/9151 cut-off events. [2024-06-28 04:27:57,205 INFO L125 PetriNetUnfolderBase]: For 1494592/1494592 co-relation queries the response was YES. [2024-06-28 04:27:57,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107989 conditions, 9151 events. 5680/9151 cut-off events. For 1494592/1494592 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 60531 event pairs, 1531 based on Foata normal form. 54/9195 useless extension candidates. Maximal degree in co-relation 107816. Up to 8183 conditions per place. [2024-06-28 04:27:57,339 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 451 selfloop transitions, 172 changer transitions 7/635 dead transitions. [2024-06-28 04:27:57,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 635 transitions, 15105 flow [2024-06-28 04:27:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:27:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:27:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 04:27:57,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-28 04:27:57,340 INFO L175 Difference]: Start difference. First operand has 362 places, 606 transitions, 13157 flow. Second operand 10 states and 169 transitions. [2024-06-28 04:27:57,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 635 transitions, 15105 flow [2024-06-28 04:28:00,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 635 transitions, 14861 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-28 04:28:00,842 INFO L231 Difference]: Finished difference. Result has 368 places, 605 transitions, 13398 flow [2024-06-28 04:28:00,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12913, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13398, PETRI_PLACES=368, PETRI_TRANSITIONS=605} [2024-06-28 04:28:00,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-28 04:28:00,843 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 605 transitions, 13398 flow [2024-06-28 04:28:00,843 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) [2024-06-28 04:28:00,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:00,843 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] [2024-06-28 04:28:00,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:28:00,843 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:00,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1421106085, now seen corresponding path program 10 times [2024-06-28 04:28:00,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:00,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080906544] [2024-06-28 04:28:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:00,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:03,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:03,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080906544] [2024-06-28 04:28:03,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080906544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:03,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:03,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:03,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94558697] [2024-06-28 04:28:03,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:03,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:03,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:03,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:03,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:03,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:28:03,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 605 transitions, 13398 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) [2024-06-28 04:28:03,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:03,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:28:03,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:06,998 INFO L124 PetriNetUnfolderBase]: 5679/9162 cut-off events. [2024-06-28 04:28:06,998 INFO L125 PetriNetUnfolderBase]: For 1489029/1489029 co-relation queries the response was YES. [2024-06-28 04:28:07,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107490 conditions, 9162 events. 5679/9162 cut-off events. For 1489029/1489029 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 60762 event pairs, 1513 based on Foata normal form. 54/9206 useless extension candidates. Maximal degree in co-relation 107315. Up to 8304 conditions per place. [2024-06-28 04:28:07,121 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 478 selfloop transitions, 139 changer transitions 8/630 dead transitions. [2024-06-28 04:28:07,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 630 transitions, 15139 flow [2024-06-28 04:28:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 04:28:07,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 04:28:07,122 INFO L175 Difference]: Start difference. First operand has 368 places, 605 transitions, 13398 flow. Second operand 9 states and 154 transitions. [2024-06-28 04:28:07,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 630 transitions, 15139 flow [2024-06-28 04:28:10,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 630 transitions, 14808 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 04:28:10,609 INFO L231 Difference]: Finished difference. Result has 371 places, 601 transitions, 13310 flow [2024-06-28 04:28:10,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13067, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13310, PETRI_PLACES=371, PETRI_TRANSITIONS=601} [2024-06-28 04:28:10,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-28 04:28:10,610 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 601 transitions, 13310 flow [2024-06-28 04:28:10,610 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) [2024-06-28 04:28:10,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:10,610 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] [2024-06-28 04:28:10,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:28:10,610 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:10,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:10,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1107951777, now seen corresponding path program 4 times [2024-06-28 04:28:10,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:10,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826956842] [2024-06-28 04:28:10,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:10,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:13,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:13,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826956842] [2024-06-28 04:28:13,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826956842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:13,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:13,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:13,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129609740] [2024-06-28 04:28:13,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:13,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:13,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:13,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:13,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:13,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:28:13,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 601 transitions, 13310 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) [2024-06-28 04:28:13,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:13,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:28:13,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:16,499 INFO L124 PetriNetUnfolderBase]: 5638/9103 cut-off events. [2024-06-28 04:28:16,499 INFO L125 PetriNetUnfolderBase]: For 1378571/1378571 co-relation queries the response was YES. [2024-06-28 04:28:16,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106661 conditions, 9103 events. 5638/9103 cut-off events. For 1378571/1378571 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 60434 event pairs, 1511 based on Foata normal form. 24/9117 useless extension candidates. Maximal degree in co-relation 106485. Up to 8349 conditions per place. [2024-06-28 04:28:16,618 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 467 selfloop transitions, 159 changer transitions 0/631 dead transitions. [2024-06-28 04:28:16,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 631 transitions, 15213 flow [2024-06-28 04:28:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:28:16,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 04:28:16,619 INFO L175 Difference]: Start difference. First operand has 371 places, 601 transitions, 13310 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:28:16,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 631 transitions, 15213 flow [2024-06-28 04:28:20,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 631 transitions, 14899 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 04:28:20,266 INFO L231 Difference]: Finished difference. Result has 374 places, 605 transitions, 13526 flow [2024-06-28 04:28:20,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12996, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13526, PETRI_PLACES=374, PETRI_TRANSITIONS=605} [2024-06-28 04:28:20,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-28 04:28:20,267 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 605 transitions, 13526 flow [2024-06-28 04:28:20,267 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) [2024-06-28 04:28:20,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:20,267 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] [2024-06-28 04:28:20,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:28:20,268 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:20,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:20,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1986567219, now seen corresponding path program 1 times [2024-06-28 04:28:20,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:20,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734251885] [2024-06-28 04:28:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:20,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:23,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734251885] [2024-06-28 04:28:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734251885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:23,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:23,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:23,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665621910] [2024-06-28 04:28:23,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:23,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:23,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:23,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:23,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:23,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:28:23,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 605 transitions, 13526 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) [2024-06-28 04:28:23,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:23,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:28:23,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:26,673 INFO L124 PetriNetUnfolderBase]: 5643/9122 cut-off events. [2024-06-28 04:28:26,674 INFO L125 PetriNetUnfolderBase]: For 1307720/1307720 co-relation queries the response was YES. [2024-06-28 04:28:26,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106712 conditions, 9122 events. 5643/9122 cut-off events. For 1307720/1307720 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 60587 event pairs, 1536 based on Foata normal form. 1/9121 useless extension candidates. Maximal degree in co-relation 106535. Up to 8743 conditions per place. [2024-06-28 04:28:26,791 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 598 selfloop transitions, 28 changer transitions 0/631 dead transitions. [2024-06-28 04:28:26,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 631 transitions, 14980 flow [2024-06-28 04:28:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:28:26,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 04:28:26,793 INFO L175 Difference]: Start difference. First operand has 374 places, 605 transitions, 13526 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:28:26,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 631 transitions, 14980 flow [2024-06-28 04:28:30,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 631 transitions, 14644 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-28 04:28:30,507 INFO L231 Difference]: Finished difference. Result has 377 places, 608 transitions, 13386 flow [2024-06-28 04:28:30,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13190, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13386, PETRI_PLACES=377, PETRI_TRANSITIONS=608} [2024-06-28 04:28:30,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-28 04:28:30,508 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 608 transitions, 13386 flow [2024-06-28 04:28:30,508 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) [2024-06-28 04:28:30,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:30,508 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] [2024-06-28 04:28:30,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:28:30,509 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:30,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:30,509 INFO L85 PathProgramCache]: Analyzing trace with hash -599650671, now seen corresponding path program 1 times [2024-06-28 04:28:30,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:30,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033390387] [2024-06-28 04:28:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:30,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:33,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:33,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033390387] [2024-06-28 04:28:33,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033390387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:33,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:33,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:33,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231401591] [2024-06-28 04:28:33,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:33,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:33,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:33,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:33,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:33,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:28:33,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 608 transitions, 13386 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) [2024-06-28 04:28:33,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:33,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:28:33,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:37,323 INFO L124 PetriNetUnfolderBase]: 5658/9153 cut-off events. [2024-06-28 04:28:37,323 INFO L125 PetriNetUnfolderBase]: For 1326306/1326306 co-relation queries the response was YES. [2024-06-28 04:28:37,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106538 conditions, 9153 events. 5658/9153 cut-off events. For 1326306/1326306 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 60795 event pairs, 1291 based on Foata normal form. 2/9153 useless extension candidates. Maximal degree in co-relation 106360. Up to 8383 conditions per place. [2024-06-28 04:28:37,433 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 557 selfloop transitions, 89 changer transitions 0/651 dead transitions. [2024-06-28 04:28:37,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 651 transitions, 15252 flow [2024-06-28 04:28:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 04:28:37,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 04:28:37,435 INFO L175 Difference]: Start difference. First operand has 377 places, 608 transitions, 13386 flow. Second operand 8 states and 156 transitions. [2024-06-28 04:28:37,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 651 transitions, 15252 flow