./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe018_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe018_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 04:15:55,781 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:15:55,842 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:15:55,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:15:55,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:15:55,869 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:15:55,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:15:55,870 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:15:55,870 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:15:55,874 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:15:55,874 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:15:55,874 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:15:55,875 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:15:55,876 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:15:55,876 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:15:55,876 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:15:55,876 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:15:55,876 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:15:55,876 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:15:55,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:15:55,877 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:15:55,877 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:15:55,877 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:15:55,877 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:15:55,877 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:15:55,878 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:15:55,878 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:15:55,878 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:15:55,878 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:15:55,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:15:55,879 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:15:55,879 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:15:55,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:15:55,879 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:15:55,880 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:15:55,880 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:15:55,880 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:15:55,880 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:15:55,880 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:15:55,880 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:15:55,880 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:15:55,880 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:15:55,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:15:55,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:15:56,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:15:56,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:15:56,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:15:56,116 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:15:56,116 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:15:56,117 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe018_power.opt.yml/witness.yml [2024-06-28 04:15:56,376 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:15:56,377 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:15:56,378 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i [2024-06-28 04:15:57,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:15:57,636 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:15:57,637 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i [2024-06-28 04:15:57,652 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1976cb1c1/923b76c7182a4cf6be9cd630fa036bb1/FLAG6a8885a25 [2024-06-28 04:15:57,665 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1976cb1c1/923b76c7182a4cf6be9cd630fa036bb1 [2024-06-28 04:15:57,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:15:57,667 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:15:57,669 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:15:57,669 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:15:57,673 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:15:57,673 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:15:56" (1/2) ... [2024-06-28 04:15:57,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4bdc02 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:15:57, skipping insertion in model container [2024-06-28 04:15:57,674 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:15:56" (1/2) ... [2024-06-28 04:15:57,675 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1739042a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:15:57, skipping insertion in model container [2024-06-28 04:15:57,675 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:15:57" (2/2) ... [2024-06-28 04:15:57,676 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4bdc02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:57, skipping insertion in model container [2024-06-28 04:15:57,676 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:15:57" (2/2) ... [2024-06-28 04:15:57,676 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:15:57,810 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:15:57,811 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$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_p0_EBX == 0 || __unbuffered_p0_EBX == 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)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) [2024-06-28 04:15:57,811 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_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$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$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$w_buff1 == 1)) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) [2024-06-28 04:15:57,811 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] ((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$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_p0_EBX == 0 || __unbuffered_p0_EBX == 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)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) [2024-06-28 04:15:57,811 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:15:57,812 INFO L106 edCorrectnessWitness]: ghost_update [L860-L860] multithreaded = 1; [2024-06-28 04:15:57,846 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:15:58,181 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:15:58,188 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:15:58,333 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:15:58,359 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:15:58,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58 WrapperNode [2024-06-28 04:15:58,359 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:15:58,360 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:15:58,360 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:15:58,360 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:15:58,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,380 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,408 INFO L138 Inliner]: procedures = 175, calls = 88, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 251 [2024-06-28 04:15:58,408 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:15:58,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:15:58,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:15:58,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:15:58,418 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,422 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,437 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 04:15:58,437 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,437 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,452 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,453 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,457 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:15:58,458 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:15:58,458 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:15:58,458 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:15:58,459 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (1/1) ... [2024-06-28 04:15:58,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:15:58,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:15:58,491 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 04:15:58,500 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 04:15:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 04:15:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 04:15:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 04:15:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 04:15:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:15:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:15:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:15:58,535 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:15:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:15:58,535 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:15:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:15:58,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:15:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:15:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 04:15:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:15:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:15:58,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:15:58,548 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 04:15:58,728 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:15:58,730 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:15:59,122 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:15:59,123 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:15:59,473 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:15:59,473 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:15:59,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:15:59 BoogieIcfgContainer [2024-06-28 04:15:59,473 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:15:59,476 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:15:59,476 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:15:59,478 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:15:59,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:15:56" (1/4) ... [2024-06-28 04:15:59,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd2d033 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:15:59, skipping insertion in model container [2024-06-28 04:15:59,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:15:57" (2/4) ... [2024-06-28 04:15:59,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd2d033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:15:59, skipping insertion in model container [2024-06-28 04:15:59,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:58" (3/4) ... [2024-06-28 04:15:59,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd2d033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:15:59, skipping insertion in model container [2024-06-28 04:15:59,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:15:59" (4/4) ... [2024-06-28 04:15:59,495 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_power.opt.i [2024-06-28 04:15:59,509 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:15:59,524 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 04:15:59,524 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:15:59,613 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:15:59,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 04:15:59,674 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-28 04:15:59,674 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:15:59,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 04:15:59,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 04:15:59,678 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-28 04:15:59,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:15:59,689 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;@15431da3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:15:59,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 04:15:59,692 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:15:59,692 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 04:15:59,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:15:59,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:59,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:15:59,693 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 04:15:59,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash 884603327, now seen corresponding path program 1 times [2024-06-28 04:15:59,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:59,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677518328] [2024-06-28 04:15:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:59,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:01,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:01,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677518328] [2024-06-28 04:16:01,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677518328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:01,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:01,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:16:01,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312545957] [2024-06-28 04:16:01,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:01,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:16:01,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:01,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:16:01,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:16:01,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 04:16:01,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 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 04:16:01,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:01,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 04:16:01,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:01,671 INFO L124 PetriNetUnfolderBase]: 897/1380 cut-off events. [2024-06-28 04:16:01,671 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-06-28 04:16:01,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2807 conditions, 1380 events. 897/1380 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6402 event pairs, 455 based on Foata normal form. 2/1357 useless extension candidates. Maximal degree in co-relation 2795. Up to 1343 conditions per place. [2024-06-28 04:16:01,683 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-28 04:16:01,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 183 flow [2024-06-28 04:16:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:16:01,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:16:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-28 04:16:01,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-28 04:16:01,694 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 69 transitions. [2024-06-28 04:16:01,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 183 flow [2024-06-28 04:16:01,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:16:01,700 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-28 04:16:01,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-28 04:16:01,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-28 04:16:01,704 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-28 04:16:01,704 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 04:16:01,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:01,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:01,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:16:01,705 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 04:16:01,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1890999986, now seen corresponding path program 1 times [2024-06-28 04:16:01,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:01,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152323352] [2024-06-28 04:16:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:01,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:04,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:04,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152323352] [2024-06-28 04:16:04,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152323352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:04,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:04,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:16:04,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810678752] [2024-06-28 04:16:04,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:04,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:16:04,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:04,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:16:04,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:16:04,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:04,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:04,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:04,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:04,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:04,631 INFO L124 PetriNetUnfolderBase]: 1139/1737 cut-off events. [2024-06-28 04:16:04,631 INFO L125 PetriNetUnfolderBase]: For 335/335 co-relation queries the response was YES. [2024-06-28 04:16:04,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4020 conditions, 1737 events. 1139/1737 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7808 event pairs, 393 based on Foata normal form. 6/1738 useless extension candidates. Maximal degree in co-relation 4008. Up to 1639 conditions per place. [2024-06-28 04:16:04,639 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 42 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2024-06-28 04:16:04,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 240 flow [2024-06-28 04:16:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:16:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:16:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-06-28 04:16:04,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-28 04:16:04,641 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 83 transitions. [2024-06-28 04:16:04,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 240 flow [2024-06-28 04:16:04,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:16:04,643 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-28 04:16:04,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-28 04:16:04,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-28 04:16:04,644 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-28 04:16:04,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:04,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:04,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:04,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:16:04,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:16:04,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:04,645 INFO L85 PathProgramCache]: Analyzing trace with hash -810500594, now seen corresponding path program 1 times [2024-06-28 04:16:04,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:04,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735768719] [2024-06-28 04:16:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:04,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:05,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:05,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735768719] [2024-06-28 04:16:05,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735768719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:05,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:05,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:16:05,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31849109] [2024-06-28 04:16:05,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:05,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:16:05,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:05,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:16:05,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:16:06,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:06,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 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 04:16:06,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:06,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:06,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:06,450 INFO L124 PetriNetUnfolderBase]: 896/1390 cut-off events. [2024-06-28 04:16:06,450 INFO L125 PetriNetUnfolderBase]: For 756/756 co-relation queries the response was YES. [2024-06-28 04:16:06,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 1390 events. 896/1390 cut-off events. For 756/756 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6422 event pairs, 389 based on Foata normal form. 4/1391 useless extension candidates. Maximal degree in co-relation 3495. Up to 1337 conditions per place. [2024-06-28 04:16:06,456 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 44 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-28 04:16:06,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 289 flow [2024-06-28 04:16:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:16:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:16:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-28 04:16:06,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-28 04:16:06,458 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 5 states and 89 transitions. [2024-06-28 04:16:06,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 289 flow [2024-06-28 04:16:06,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 272 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 04:16:06,460 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 172 flow [2024-06-28 04:16:06,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-28 04:16:06,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-28 04:16:06,461 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 172 flow [2024-06-28 04:16:06,461 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 04:16:06,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:06,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:06,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:16:06,462 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 04:16:06,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash 644287143, now seen corresponding path program 1 times [2024-06-28 04:16:06,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:06,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792808245] [2024-06-28 04:16:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:06,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:08,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:08,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792808245] [2024-06-28 04:16:08,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792808245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:08,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:08,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:16:08,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421513508] [2024-06-28 04:16:08,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:08,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:16:08,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:08,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:16:08,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:16:08,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:08,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 172 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 04:16:08,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:08,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:08,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:08,726 INFO L124 PetriNetUnfolderBase]: 891/1383 cut-off events. [2024-06-28 04:16:08,727 INFO L125 PetriNetUnfolderBase]: For 1419/1419 co-relation queries the response was YES. [2024-06-28 04:16:08,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3999 conditions, 1383 events. 891/1383 cut-off events. For 1419/1419 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6353 event pairs, 371 based on Foata normal form. 2/1382 useless extension candidates. Maximal degree in co-relation 3981. Up to 1330 conditions per place. [2024-06-28 04:16:08,733 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 51 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-28 04:16:08,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 374 flow [2024-06-28 04:16:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:16:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:16:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-28 04:16:08,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-28 04:16:08,735 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 172 flow. Second operand 6 states and 104 transitions. [2024-06-28 04:16:08,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 374 flow [2024-06-28 04:16:08,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 354 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-28 04:16:08,737 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 228 flow [2024-06-28 04:16:08,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-28 04:16:08,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-28 04:16:08,738 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 228 flow [2024-06-28 04:16:08,739 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 04:16:08,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:08,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:08,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:16:08,739 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 04:16:08,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:08,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1501933235, now seen corresponding path program 1 times [2024-06-28 04:16:08,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:08,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903663592] [2024-06-28 04:16:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:08,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:10,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:10,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903663592] [2024-06-28 04:16:10,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903663592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:10,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:10,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:10,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593921308] [2024-06-28 04:16:10,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:10,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:10,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:10,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:10,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:10,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:10,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 228 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 04:16:10,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:10,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:10,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:11,291 INFO L124 PetriNetUnfolderBase]: 883/1371 cut-off events. [2024-06-28 04:16:11,291 INFO L125 PetriNetUnfolderBase]: For 2136/2136 co-relation queries the response was YES. [2024-06-28 04:16:11,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4325 conditions, 1371 events. 883/1371 cut-off events. For 2136/2136 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6273 event pairs, 352 based on Foata normal form. 4/1372 useless extension candidates. Maximal degree in co-relation 4304. Up to 1296 conditions per place. [2024-06-28 04:16:11,300 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 57 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-28 04:16:11,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 75 transitions, 444 flow [2024-06-28 04:16:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:16:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:16:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:16:11,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-28 04:16:11,305 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 228 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:16:11,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 75 transitions, 444 flow [2024-06-28 04:16:11,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 75 transitions, 428 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-28 04:16:11,314 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 265 flow [2024-06-28 04:16:11,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=265, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-06-28 04:16:11,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-28 04:16:11,317 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 265 flow [2024-06-28 04:16:11,317 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 04:16:11,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:11,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:11,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:16:11,318 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 04:16:11,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:11,319 INFO L85 PathProgramCache]: Analyzing trace with hash 507214060, now seen corresponding path program 1 times [2024-06-28 04:16:11,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:11,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235826857] [2024-06-28 04:16:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:11,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:13,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:13,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235826857] [2024-06-28 04:16:13,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235826857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:13,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:13,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:13,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505611108] [2024-06-28 04:16:13,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:13,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:13,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:13,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:16:13,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 265 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:13,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:13,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:16:13,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:13,963 INFO L124 PetriNetUnfolderBase]: 1111/1703 cut-off events. [2024-06-28 04:16:13,964 INFO L125 PetriNetUnfolderBase]: For 3464/3464 co-relation queries the response was YES. [2024-06-28 04:16:13,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5583 conditions, 1703 events. 1111/1703 cut-off events. For 3464/3464 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7611 event pairs, 402 based on Foata normal form. 2/1700 useless extension candidates. Maximal degree in co-relation 5560. Up to 1587 conditions per place. [2024-06-28 04:16:13,974 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 50 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-28 04:16:13,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 455 flow [2024-06-28 04:16:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:16:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:16:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-28 04:16:13,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-28 04:16:13,976 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 265 flow. Second operand 5 states and 88 transitions. [2024-06-28 04:16:13,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 455 flow [2024-06-28 04:16:13,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 420 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 04:16:13,981 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 302 flow [2024-06-28 04:16:13,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-28 04:16:13,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-28 04:16:13,985 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 302 flow [2024-06-28 04:16:13,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:13,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:13,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:13,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:16:13,986 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 04:16:13,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:13,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1434453265, now seen corresponding path program 1 times [2024-06-28 04:16:13,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:13,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817404401] [2024-06-28 04:16:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:13,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:16,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:16,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817404401] [2024-06-28 04:16:16,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817404401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:16,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:16,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:16:16,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785578045] [2024-06-28 04:16:16,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:16,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:16:16,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:16,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:16:16,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:16:16,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:16:16,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 302 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 04:16:16,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:16,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:16:16,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:17,221 INFO L124 PetriNetUnfolderBase]: 1124/1728 cut-off events. [2024-06-28 04:16:17,221 INFO L125 PetriNetUnfolderBase]: For 4783/4783 co-relation queries the response was YES. [2024-06-28 04:16:17,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6024 conditions, 1728 events. 1124/1728 cut-off events. For 4783/4783 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7768 event pairs, 384 based on Foata normal form. 2/1725 useless extension candidates. Maximal degree in co-relation 6000. Up to 1561 conditions per place. [2024-06-28 04:16:17,230 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2024-06-28 04:16:17,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 528 flow [2024-06-28 04:16:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:16:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:16:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 04:16:17,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 04:16:17,233 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 302 flow. Second operand 6 states and 105 transitions. [2024-06-28 04:16:17,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 528 flow [2024-06-28 04:16:17,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 484 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 04:16:17,238 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 345 flow [2024-06-28 04:16:17,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-28 04:16:17,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-28 04:16:17,239 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 345 flow [2024-06-28 04:16:17,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 04:16:17,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:17,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:17,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:16:17,240 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 04:16:17,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash -586711659, now seen corresponding path program 2 times [2024-06-28 04:16:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:17,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203477111] [2024-06-28 04:16:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:17,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:19,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:19,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203477111] [2024-06-28 04:16:19,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203477111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:19,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:19,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:19,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051821281] [2024-06-28 04:16:19,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:19,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:19,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:19,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:19,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 345 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 04:16:19,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:19,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:19,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:20,351 INFO L124 PetriNetUnfolderBase]: 886/1375 cut-off events. [2024-06-28 04:16:20,351 INFO L125 PetriNetUnfolderBase]: For 4140/4140 co-relation queries the response was YES. [2024-06-28 04:16:20,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5008 conditions, 1375 events. 886/1375 cut-off events. For 4140/4140 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6339 event pairs, 340 based on Foata normal form. 2/1372 useless extension candidates. Maximal degree in co-relation 4983. Up to 1254 conditions per place. [2024-06-28 04:16:20,359 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 24 changer transitions 0/83 dead transitions. [2024-06-28 04:16:20,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 587 flow [2024-06-28 04:16:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:16:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:16:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 04:16:20,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:16:20,362 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 345 flow. Second operand 7 states and 123 transitions. [2024-06-28 04:16:20,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 587 flow [2024-06-28 04:16:20,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 530 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:20,366 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 378 flow [2024-06-28 04:16:20,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=378, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-28 04:16:20,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-28 04:16:20,368 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 378 flow [2024-06-28 04:16:20,368 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 04:16:20,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:20,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:20,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:16:20,369 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:16:20,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:20,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1886334997, now seen corresponding path program 1 times [2024-06-28 04:16:20,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:20,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616328736] [2024-06-28 04:16:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:20,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:22,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:22,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616328736] [2024-06-28 04:16:22,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616328736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:22,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:22,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:16:22,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735215396] [2024-06-28 04:16:22,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:22,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:16:22,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:16:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:16:22,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:22,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 378 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 04:16:22,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:22,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:22,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:22,811 INFO L124 PetriNetUnfolderBase]: 880/1367 cut-off events. [2024-06-28 04:16:22,812 INFO L125 PetriNetUnfolderBase]: For 4334/4334 co-relation queries the response was YES. [2024-06-28 04:16:22,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5079 conditions, 1367 events. 880/1367 cut-off events. For 4334/4334 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6282 event pairs, 338 based on Foata normal form. 2/1364 useless extension candidates. Maximal degree in co-relation 5053. Up to 1310 conditions per place. [2024-06-28 04:16:22,823 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 58 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2024-06-28 04:16:22,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 73 transitions, 564 flow [2024-06-28 04:16:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:16:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:16:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-28 04:16:22,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:16:22,825 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 378 flow. Second operand 5 states and 85 transitions. [2024-06-28 04:16:22,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 73 transitions, 564 flow [2024-06-28 04:16:22,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 502 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 04:16:22,830 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 367 flow [2024-06-28 04:16:22,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=367, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-28 04:16:22,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-28 04:16:22,830 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 367 flow [2024-06-28 04:16:22,831 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 04:16:22,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:22,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:22,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:16:22,831 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 04:16:22,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:22,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1403844729, now seen corresponding path program 1 times [2024-06-28 04:16:22,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:22,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156320849] [2024-06-28 04:16:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:22,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:25,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:25,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156320849] [2024-06-28 04:16:25,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156320849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:25,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:25,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:16:25,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827700498] [2024-06-28 04:16:25,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:25,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:16:25,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:25,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:16:25,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:16:25,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:16:25,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 367 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 04:16:25,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:25,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:16:25,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:25,995 INFO L124 PetriNetUnfolderBase]: 1130/1741 cut-off events. [2024-06-28 04:16:25,996 INFO L125 PetriNetUnfolderBase]: For 6148/6148 co-relation queries the response was YES. [2024-06-28 04:16:26,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6483 conditions, 1741 events. 1130/1741 cut-off events. For 6148/6148 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7837 event pairs, 240 based on Foata normal form. 4/1740 useless extension candidates. Maximal degree in co-relation 6456. Up to 1603 conditions per place. [2024-06-28 04:16:26,005 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 71 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-06-28 04:16:26,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 601 flow [2024-06-28 04:16:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:16:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:16:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 04:16:26,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-28 04:16:26,007 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 367 flow. Second operand 6 states and 101 transitions. [2024-06-28 04:16:26,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 601 flow [2024-06-28 04:16:26,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 86 transitions, 574 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 04:16:26,014 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 391 flow [2024-06-28 04:16:26,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-28 04:16:26,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-28 04:16:26,014 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 391 flow [2024-06-28 04:16:26,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 04:16:26,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:26,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:26,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:16:26,015 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 04:16:26,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:26,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1518375107, now seen corresponding path program 2 times [2024-06-28 04:16:26,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:26,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659871203] [2024-06-28 04:16:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:26,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:28,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659871203] [2024-06-28 04:16:28,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659871203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:28,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:28,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:28,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113338888] [2024-06-28 04:16:28,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:28,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:28,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:28,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:28,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:28,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:28,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 391 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 04:16:28,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:28,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:28,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:28,933 INFO L124 PetriNetUnfolderBase]: 948/1481 cut-off events. [2024-06-28 04:16:28,933 INFO L125 PetriNetUnfolderBase]: For 6571/6571 co-relation queries the response was YES. [2024-06-28 04:16:28,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5961 conditions, 1481 events. 948/1481 cut-off events. For 6571/6571 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6880 event pairs, 294 based on Foata normal form. 4/1481 useless extension candidates. Maximal degree in co-relation 5933. Up to 1384 conditions per place. [2024-06-28 04:16:28,941 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 78 selfloop transitions, 18 changer transitions 0/101 dead transitions. [2024-06-28 04:16:28,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 732 flow [2024-06-28 04:16:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:16:28,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-28 04:16:28,943 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 391 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:16:28,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 732 flow [2024-06-28 04:16:28,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 691 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:28,948 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 506 flow [2024-06-28 04:16:28,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=506, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2024-06-28 04:16:28,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-28 04:16:28,949 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 506 flow [2024-06-28 04:16:28,949 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 04:16:28,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:28,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:28,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:16:28,950 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 04:16:28,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:28,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1246402559, now seen corresponding path program 1 times [2024-06-28 04:16:28,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:28,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136068201] [2024-06-28 04:16:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:31,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:31,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136068201] [2024-06-28 04:16:31,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136068201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:31,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:31,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:16:31,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115761676] [2024-06-28 04:16:31,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:31,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:16:31,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:31,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:16:31,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:16:31,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:16:31,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 506 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:31,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:31,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:16:31,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:32,342 INFO L124 PetriNetUnfolderBase]: 1259/1964 cut-off events. [2024-06-28 04:16:32,343 INFO L125 PetriNetUnfolderBase]: For 10251/10259 co-relation queries the response was YES. [2024-06-28 04:16:32,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 1964 events. 1259/1964 cut-off events. For 10251/10259 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9197 event pairs, 307 based on Foata normal form. 17/1977 useless extension candidates. Maximal degree in co-relation 7916. Up to 1608 conditions per place. [2024-06-28 04:16:32,357 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 77 selfloop transitions, 29 changer transitions 0/110 dead transitions. [2024-06-28 04:16:32,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 838 flow [2024-06-28 04:16:32,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:16:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:16:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 04:16:32,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-28 04:16:32,359 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 506 flow. Second operand 7 states and 124 transitions. [2024-06-28 04:16:32,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 838 flow [2024-06-28 04:16:32,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 110 transitions, 785 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 04:16:32,370 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 572 flow [2024-06-28 04:16:32,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=572, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-06-28 04:16:32,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-28 04:16:32,371 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 572 flow [2024-06-28 04:16:32,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:32,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:32,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:32,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:16:32,372 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 04:16:32,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:32,372 INFO L85 PathProgramCache]: Analyzing trace with hash 711554971, now seen corresponding path program 3 times [2024-06-28 04:16:32,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:32,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549670946] [2024-06-28 04:16:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:32,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:34,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:34,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549670946] [2024-06-28 04:16:34,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549670946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:34,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:34,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:16:34,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528516472] [2024-06-28 04:16:34,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:34,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:16:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:34,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:16:34,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:16:34,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:16:34,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 572 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 04:16:34,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:34,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:16:34,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:35,079 INFO L124 PetriNetUnfolderBase]: 1251/1952 cut-off events. [2024-06-28 04:16:35,079 INFO L125 PetriNetUnfolderBase]: For 11086/11094 co-relation queries the response was YES. [2024-06-28 04:16:35,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8146 conditions, 1952 events. 1251/1952 cut-off events. For 11086/11094 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9171 event pairs, 358 based on Foata normal form. 5/1953 useless extension candidates. Maximal degree in co-relation 8112. Up to 1748 conditions per place. [2024-06-28 04:16:35,090 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 72 selfloop transitions, 26 changer transitions 0/102 dead transitions. [2024-06-28 04:16:35,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 102 transitions, 846 flow [2024-06-28 04:16:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:16:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:16:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-28 04:16:35,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-28 04:16:35,091 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 572 flow. Second operand 6 states and 103 transitions. [2024-06-28 04:16:35,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 102 transitions, 846 flow [2024-06-28 04:16:35,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 102 transitions, 791 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:35,106 INFO L231 Difference]: Finished difference. Result has 81 places, 81 transitions, 612 flow [2024-06-28 04:16:35,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=612, PETRI_PLACES=81, PETRI_TRANSITIONS=81} [2024-06-28 04:16:35,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-28 04:16:35,106 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 81 transitions, 612 flow [2024-06-28 04:16:35,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 04:16:35,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:35,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:35,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:16:35,107 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 04:16:35,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1008183923, now seen corresponding path program 2 times [2024-06-28 04:16:35,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:35,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347305588] [2024-06-28 04:16:35,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:35,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:37,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:37,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347305588] [2024-06-28 04:16:37,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347305588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:37,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:37,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:16:37,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235411614] [2024-06-28 04:16:37,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:37,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:16:37,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:37,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:16:37,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:16:37,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:37,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 81 transitions, 612 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 04:16:37,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:37,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:37,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:38,465 INFO L124 PetriNetUnfolderBase]: 1137/1812 cut-off events. [2024-06-28 04:16:38,466 INFO L125 PetriNetUnfolderBase]: For 12990/12993 co-relation queries the response was YES. [2024-06-28 04:16:38,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8062 conditions, 1812 events. 1137/1812 cut-off events. For 12990/12993 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8949 event pairs, 305 based on Foata normal form. 12/1818 useless extension candidates. Maximal degree in co-relation 8027. Up to 1268 conditions per place. [2024-06-28 04:16:38,476 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 77 selfloop transitions, 38 changer transitions 0/120 dead transitions. [2024-06-28 04:16:38,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 120 transitions, 1038 flow [2024-06-28 04:16:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:38,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:38,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:16:38,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-28 04:16:38,477 INFO L175 Difference]: Start difference. First operand has 81 places, 81 transitions, 612 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:16:38,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 120 transitions, 1038 flow [2024-06-28 04:16:38,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 120 transitions, 957 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:38,490 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 663 flow [2024-06-28 04:16:38,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=663, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2024-06-28 04:16:38,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-28 04:16:38,491 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 663 flow [2024-06-28 04:16:38,491 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 04:16:38,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:38,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:38,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:16:38,491 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 04:16:38,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1072910133, now seen corresponding path program 3 times [2024-06-28 04:16:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:38,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016524145] [2024-06-28 04:16:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:38,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:40,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:40,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016524145] [2024-06-28 04:16:40,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016524145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:40,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:40,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:16:40,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117433758] [2024-06-28 04:16:40,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:40,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:16:40,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:40,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:16:40,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:16:40,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:16:40,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 663 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:40,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:40,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:16:40,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:42,014 INFO L124 PetriNetUnfolderBase]: 1474/2336 cut-off events. [2024-06-28 04:16:42,014 INFO L125 PetriNetUnfolderBase]: For 16030/16040 co-relation queries the response was YES. [2024-06-28 04:16:42,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10071 conditions, 2336 events. 1474/2336 cut-off events. For 16030/16040 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11773 event pairs, 405 based on Foata normal form. 24/2357 useless extension candidates. Maximal degree in co-relation 10035. Up to 2080 conditions per place. [2024-06-28 04:16:42,025 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 107 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-28 04:16:42,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 133 transitions, 1141 flow [2024-06-28 04:16:42,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:16:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:16:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 04:16:42,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-28 04:16:42,026 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 663 flow. Second operand 9 states and 149 transitions. [2024-06-28 04:16:42,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 133 transitions, 1141 flow [2024-06-28 04:16:42,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 1080 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:42,042 INFO L231 Difference]: Finished difference. Result has 93 places, 94 transitions, 790 flow [2024-06-28 04:16:42,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=790, PETRI_PLACES=93, PETRI_TRANSITIONS=94} [2024-06-28 04:16:42,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-28 04:16:42,043 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 94 transitions, 790 flow [2024-06-28 04:16:42,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:42,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:42,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:42,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:16:42,043 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 04:16:42,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:42,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1009974371, now seen corresponding path program 4 times [2024-06-28 04:16:42,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:42,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373016375] [2024-06-28 04:16:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:42,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:44,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:44,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373016375] [2024-06-28 04:16:44,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373016375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:44,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:44,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:16:44,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404180179] [2024-06-28 04:16:44,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:44,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:16:44,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:44,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:16:44,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:16:44,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:16:44,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 790 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:44,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:44,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:16:44,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:45,289 INFO L124 PetriNetUnfolderBase]: 1542/2447 cut-off events. [2024-06-28 04:16:45,289 INFO L125 PetriNetUnfolderBase]: For 18763/18771 co-relation queries the response was YES. [2024-06-28 04:16:45,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10949 conditions, 2447 events. 1542/2447 cut-off events. For 18763/18771 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12432 event pairs, 420 based on Foata normal form. 17/2460 useless extension candidates. Maximal degree in co-relation 10908. Up to 2075 conditions per place. [2024-06-28 04:16:45,307 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 43 changer transitions 0/129 dead transitions. [2024-06-28 04:16:45,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 129 transitions, 1162 flow [2024-06-28 04:16:45,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:16:45,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-28 04:16:45,309 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 790 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:16:45,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 129 transitions, 1162 flow [2024-06-28 04:16:45,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 129 transitions, 1109 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:45,332 INFO L231 Difference]: Finished difference. Result has 97 places, 95 transitions, 856 flow [2024-06-28 04:16:45,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=856, PETRI_PLACES=97, PETRI_TRANSITIONS=95} [2024-06-28 04:16:45,332 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-28 04:16:45,332 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 95 transitions, 856 flow [2024-06-28 04:16:45,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:45,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:45,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:45,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:16:45,333 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 04:16:45,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:45,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1008363413, now seen corresponding path program 5 times [2024-06-28 04:16:45,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:45,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667802858] [2024-06-28 04:16:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:45,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:47,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:47,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667802858] [2024-06-28 04:16:47,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667802858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:47,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:47,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:16:47,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572934914] [2024-06-28 04:16:47,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:47,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:16:47,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:47,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:16:47,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:16:47,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:47,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 856 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 04:16:47,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:47,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:47,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:48,455 INFO L124 PetriNetUnfolderBase]: 1298/2097 cut-off events. [2024-06-28 04:16:48,456 INFO L125 PetriNetUnfolderBase]: For 17489/17519 co-relation queries the response was YES. [2024-06-28 04:16:48,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9498 conditions, 2097 events. 1298/2097 cut-off events. For 17489/17519 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10942 event pairs, 366 based on Foata normal form. 22/2108 useless extension candidates. Maximal degree in co-relation 9456. Up to 1735 conditions per place. [2024-06-28 04:16:48,467 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 26 changer transitions 0/128 dead transitions. [2024-06-28 04:16:48,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 128 transitions, 1196 flow [2024-06-28 04:16:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:16:48,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 04:16:48,477 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 856 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:16:48,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 128 transitions, 1196 flow [2024-06-28 04:16:48,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 128 transitions, 1095 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 04:16:48,499 INFO L231 Difference]: Finished difference. Result has 99 places, 95 transitions, 817 flow [2024-06-28 04:16:48,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=817, PETRI_PLACES=99, PETRI_TRANSITIONS=95} [2024-06-28 04:16:48,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-28 04:16:48,499 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 95 transitions, 817 flow [2024-06-28 04:16:48,500 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 04:16:48,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:48,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:48,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:16:48,500 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 04:16:48,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:48,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1653154791, now seen corresponding path program 1 times [2024-06-28 04:16:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:48,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012840647] [2024-06-28 04:16:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:48,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:50,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:50,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012840647] [2024-06-28 04:16:50,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012840647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:50,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:50,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:16:50,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719452255] [2024-06-28 04:16:50,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:50,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:16:50,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:50,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:16:50,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:16:50,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:16:50,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 95 transitions, 817 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:50,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:50,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:16:50,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:51,247 INFO L124 PetriNetUnfolderBase]: 1508/2398 cut-off events. [2024-06-28 04:16:51,247 INFO L125 PetriNetUnfolderBase]: For 18800/18802 co-relation queries the response was YES. [2024-06-28 04:16:51,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10672 conditions, 2398 events. 1508/2398 cut-off events. For 18800/18802 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12219 event pairs, 390 based on Foata normal form. 2/2398 useless extension candidates. Maximal degree in co-relation 10629. Up to 2332 conditions per place. [2024-06-28 04:16:51,258 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 101 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2024-06-28 04:16:51,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 116 transitions, 1132 flow [2024-06-28 04:16:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:16:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:16:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-28 04:16:51,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-06-28 04:16:51,259 INFO L175 Difference]: Start difference. First operand has 99 places, 95 transitions, 817 flow. Second operand 6 states and 91 transitions. [2024-06-28 04:16:51,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 116 transitions, 1132 flow [2024-06-28 04:16:51,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 116 transitions, 1027 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-28 04:16:51,281 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 821 flow [2024-06-28 04:16:51,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=821, PETRI_PLACES=99, PETRI_TRANSITIONS=104} [2024-06-28 04:16:51,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-28 04:16:51,281 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 821 flow [2024-06-28 04:16:51,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:51,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:51,282 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 04:16:51,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:16:51,282 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 04:16:51,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:51,282 INFO L85 PathProgramCache]: Analyzing trace with hash 632164106, now seen corresponding path program 1 times [2024-06-28 04:16:51,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:51,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523749856] [2024-06-28 04:16:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:51,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:53,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:53,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523749856] [2024-06-28 04:16:53,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523749856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:53,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:53,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:16:53,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896393063] [2024-06-28 04:16:53,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:53,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:16:53,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:53,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:16:53,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:16:53,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:16:53,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 104 transitions, 821 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:53,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:53,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:16:53,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:54,464 INFO L124 PetriNetUnfolderBase]: 1556/2479 cut-off events. [2024-06-28 04:16:54,464 INFO L125 PetriNetUnfolderBase]: For 19344/19352 co-relation queries the response was YES. [2024-06-28 04:16:54,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10942 conditions, 2479 events. 1556/2479 cut-off events. For 19344/19352 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12593 event pairs, 281 based on Foata normal form. 13/2488 useless extension candidates. Maximal degree in co-relation 10898. Up to 2222 conditions per place. [2024-06-28 04:16:54,477 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2024-06-28 04:16:54,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 133 transitions, 1171 flow [2024-06-28 04:16:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:16:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:16:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 04:16:54,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-28 04:16:54,479 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 821 flow. Second operand 7 states and 117 transitions. [2024-06-28 04:16:54,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 133 transitions, 1171 flow [2024-06-28 04:16:54,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 133 transitions, 1157 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-28 04:16:54,497 INFO L231 Difference]: Finished difference. Result has 105 places, 105 transitions, 873 flow [2024-06-28 04:16:54,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=873, PETRI_PLACES=105, PETRI_TRANSITIONS=105} [2024-06-28 04:16:54,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-28 04:16:54,498 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 105 transitions, 873 flow [2024-06-28 04:16:54,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:54,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:54,499 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 04:16:54,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:16:54,499 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 04:16:54,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 670061212, now seen corresponding path program 2 times [2024-06-28 04:16:54,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:54,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065397423] [2024-06-28 04:16:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:54,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:56,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:56,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065397423] [2024-06-28 04:16:56,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065397423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:56,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:56,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:16:56,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200633710] [2024-06-28 04:16:56,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:56,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:16:56,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:56,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:16:56,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:16:56,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:16:56,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 105 transitions, 873 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:56,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:56,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:16:56,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:57,517 INFO L124 PetriNetUnfolderBase]: 1624/2595 cut-off events. [2024-06-28 04:16:57,517 INFO L125 PetriNetUnfolderBase]: For 22149/22157 co-relation queries the response was YES. [2024-06-28 04:16:57,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11609 conditions, 2595 events. 1624/2595 cut-off events. For 22149/22157 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13498 event pairs, 414 based on Foata normal form. 13/2604 useless extension candidates. Maximal degree in co-relation 11562. Up to 2301 conditions per place. [2024-06-28 04:16:57,530 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 101 selfloop transitions, 30 changer transitions 0/135 dead transitions. [2024-06-28 04:16:57,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 135 transitions, 1239 flow [2024-06-28 04:16:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:16:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:16:57,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:16:57,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:16:57,532 INFO L175 Difference]: Start difference. First operand has 105 places, 105 transitions, 873 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:16:57,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 135 transitions, 1239 flow [2024-06-28 04:16:57,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 1189 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:16:57,554 INFO L231 Difference]: Finished difference. Result has 108 places, 108 transitions, 938 flow [2024-06-28 04:16:57,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=938, PETRI_PLACES=108, PETRI_TRANSITIONS=108} [2024-06-28 04:16:57,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-28 04:16:57,555 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 108 transitions, 938 flow [2024-06-28 04:16:57,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:57,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:57,555 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 04:16:57,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:16:57,556 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 04:16:57,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:57,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1194646710, now seen corresponding path program 3 times [2024-06-28 04:16:57,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:57,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771221063] [2024-06-28 04:16:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:57,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:59,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:59,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771221063] [2024-06-28 04:16:59,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771221063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:59,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:59,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:16:59,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494870578] [2024-06-28 04:16:59,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:59,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:16:59,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:59,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:16:59,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:16:59,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:59,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 108 transitions, 938 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 04:16:59,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:59,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:59,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:00,952 INFO L124 PetriNetUnfolderBase]: 1514/2469 cut-off events. [2024-06-28 04:17:00,952 INFO L125 PetriNetUnfolderBase]: For 23205/23208 co-relation queries the response was YES. [2024-06-28 04:17:00,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11085 conditions, 2469 events. 1514/2469 cut-off events. For 23205/23208 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13021 event pairs, 398 based on Foata normal form. 12/2478 useless extension candidates. Maximal degree in co-relation 11036. Up to 2233 conditions per place. [2024-06-28 04:17:00,965 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 108 selfloop transitions, 23 changer transitions 0/140 dead transitions. [2024-06-28 04:17:00,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 1256 flow [2024-06-28 04:17:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:17:00,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:17:00,967 INFO L175 Difference]: Start difference. First operand has 108 places, 108 transitions, 938 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:17:00,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 1256 flow [2024-06-28 04:17:00,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 140 transitions, 1183 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 04:17:00,993 INFO L231 Difference]: Finished difference. Result has 111 places, 107 transitions, 885 flow [2024-06-28 04:17:00,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=885, PETRI_PLACES=111, PETRI_TRANSITIONS=107} [2024-06-28 04:17:00,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-28 04:17:00,994 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 107 transitions, 885 flow [2024-06-28 04:17:00,994 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 04:17:00,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:00,994 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 04:17:00,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:17:00,995 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:17:00,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1060912178, now seen corresponding path program 1 times [2024-06-28 04:17:00,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:00,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489999080] [2024-06-28 04:17:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:00,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:03,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:03,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489999080] [2024-06-28 04:17:03,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489999080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:03,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:03,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:17:03,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306142301] [2024-06-28 04:17:03,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:03,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:17:03,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:17:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:17:03,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:03,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 107 transitions, 885 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 04:17:03,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:03,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:03,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:03,700 INFO L124 PetriNetUnfolderBase]: 1529/2490 cut-off events. [2024-06-28 04:17:03,700 INFO L125 PetriNetUnfolderBase]: For 23652/23655 co-relation queries the response was YES. [2024-06-28 04:17:03,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11174 conditions, 2490 events. 1529/2490 cut-off events. For 23652/23655 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13162 event pairs, 414 based on Foata normal form. 3/2490 useless extension candidates. Maximal degree in co-relation 11124. Up to 2351 conditions per place. [2024-06-28 04:17:03,717 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 95 selfloop transitions, 22 changer transitions 0/126 dead transitions. [2024-06-28 04:17:03,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 126 transitions, 1191 flow [2024-06-28 04:17:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:17:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:17:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-28 04:17:03,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-28 04:17:03,718 INFO L175 Difference]: Start difference. First operand has 111 places, 107 transitions, 885 flow. Second operand 6 states and 100 transitions. [2024-06-28 04:17:03,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 126 transitions, 1191 flow [2024-06-28 04:17:03,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 126 transitions, 1082 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 04:17:03,744 INFO L231 Difference]: Finished difference. Result has 109 places, 111 transitions, 870 flow [2024-06-28 04:17:03,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=870, PETRI_PLACES=109, PETRI_TRANSITIONS=111} [2024-06-28 04:17:03,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-28 04:17:03,744 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 111 transitions, 870 flow [2024-06-28 04:17:03,744 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 04:17:03,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:03,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:03,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:17:03,745 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 04:17:03,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:03,745 INFO L85 PathProgramCache]: Analyzing trace with hash -40662996, now seen corresponding path program 2 times [2024-06-28 04:17:03,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:03,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928525106] [2024-06-28 04:17:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:03,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:05,725 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 04:17:05,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:05,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928525106] [2024-06-28 04:17:05,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928525106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:05,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:05,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:17:05,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346929618] [2024-06-28 04:17:05,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:05,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:17:05,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:05,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:17:05,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:17:05,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:05,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 111 transitions, 870 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 04:17:05,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:05,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:05,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:06,703 INFO L124 PetriNetUnfolderBase]: 1667/2686 cut-off events. [2024-06-28 04:17:06,704 INFO L125 PetriNetUnfolderBase]: For 28163/28166 co-relation queries the response was YES. [2024-06-28 04:17:06,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12487 conditions, 2686 events. 1667/2686 cut-off events. For 28163/28166 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14076 event pairs, 401 based on Foata normal form. 3/2682 useless extension candidates. Maximal degree in co-relation 12438. Up to 2340 conditions per place. [2024-06-28 04:17:06,721 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 87 selfloop transitions, 44 changer transitions 0/140 dead transitions. [2024-06-28 04:17:06,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 140 transitions, 1306 flow [2024-06-28 04:17:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:17:06,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-28 04:17:06,723 INFO L175 Difference]: Start difference. First operand has 109 places, 111 transitions, 870 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:17:06,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 140 transitions, 1306 flow [2024-06-28 04:17:06,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 140 transitions, 1246 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 04:17:06,760 INFO L231 Difference]: Finished difference. Result has 113 places, 120 transitions, 1022 flow [2024-06-28 04:17:06,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1022, PETRI_PLACES=113, PETRI_TRANSITIONS=120} [2024-06-28 04:17:06,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-28 04:17:06,761 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 120 transitions, 1022 flow [2024-06-28 04:17:06,761 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 04:17:06,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:06,761 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 04:17:06,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:17:06,762 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:17:06,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1585476062, now seen corresponding path program 1 times [2024-06-28 04:17:06,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:06,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171453496] [2024-06-28 04:17:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:06,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:08,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:08,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171453496] [2024-06-28 04:17:08,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171453496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:08,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:08,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:08,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711518748] [2024-06-28 04:17:08,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:08,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:08,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:17:08,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 120 transitions, 1022 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:08,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:08,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:17:08,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:09,870 INFO L124 PetriNetUnfolderBase]: 1784/2827 cut-off events. [2024-06-28 04:17:09,872 INFO L125 PetriNetUnfolderBase]: For 33471/33479 co-relation queries the response was YES. [2024-06-28 04:17:09,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14159 conditions, 2827 events. 1784/2827 cut-off events. For 33471/33479 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14747 event pairs, 460 based on Foata normal form. 5/2828 useless extension candidates. Maximal degree in co-relation 14108. Up to 2687 conditions per place. [2024-06-28 04:17:09,887 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 108 selfloop transitions, 24 changer transitions 0/136 dead transitions. [2024-06-28 04:17:09,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 136 transitions, 1373 flow [2024-06-28 04:17:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:17:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:17:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-28 04:17:09,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:17:09,889 INFO L175 Difference]: Start difference. First operand has 113 places, 120 transitions, 1022 flow. Second operand 6 states and 96 transitions. [2024-06-28 04:17:09,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 136 transitions, 1373 flow [2024-06-28 04:17:09,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 136 transitions, 1330 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 04:17:09,926 INFO L231 Difference]: Finished difference. Result has 116 places, 123 transitions, 1078 flow [2024-06-28 04:17:09,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1078, PETRI_PLACES=116, PETRI_TRANSITIONS=123} [2024-06-28 04:17:09,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-28 04:17:09,926 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 123 transitions, 1078 flow [2024-06-28 04:17:09,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:09,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:09,927 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 04:17:09,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:17:09,927 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:17:09,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash -743059084, now seen corresponding path program 2 times [2024-06-28 04:17:09,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:09,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569496258] [2024-06-28 04:17:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:09,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:11,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:11,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569496258] [2024-06-28 04:17:11,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569496258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:11,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:11,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:11,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760317330] [2024-06-28 04:17:11,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:11,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:11,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:11,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:12,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:17:12,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 123 transitions, 1078 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:12,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:12,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:17:12,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:13,184 INFO L124 PetriNetUnfolderBase]: 1772/2811 cut-off events. [2024-06-28 04:17:13,185 INFO L125 PetriNetUnfolderBase]: For 34941/34949 co-relation queries the response was YES. [2024-06-28 04:17:13,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14457 conditions, 2811 events. 1772/2811 cut-off events. For 34941/34949 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14630 event pairs, 458 based on Foata normal form. 5/2812 useless extension candidates. Maximal degree in co-relation 14404. Up to 2655 conditions per place. [2024-06-28 04:17:13,200 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 111 selfloop transitions, 27 changer transitions 0/142 dead transitions. [2024-06-28 04:17:13,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 142 transitions, 1465 flow [2024-06-28 04:17:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 04:17:13,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-28 04:17:13,202 INFO L175 Difference]: Start difference. First operand has 116 places, 123 transitions, 1078 flow. Second operand 7 states and 109 transitions. [2024-06-28 04:17:13,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 142 transitions, 1465 flow [2024-06-28 04:17:13,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 142 transitions, 1407 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 04:17:13,248 INFO L231 Difference]: Finished difference. Result has 119 places, 126 transitions, 1127 flow [2024-06-28 04:17:13,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1127, PETRI_PLACES=119, PETRI_TRANSITIONS=126} [2024-06-28 04:17:13,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-28 04:17:13,249 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 126 transitions, 1127 flow [2024-06-28 04:17:13,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:13,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:13,250 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 04:17:13,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:17:13,250 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:17:13,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1408250395, now seen corresponding path program 1 times [2024-06-28 04:17:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174382522] [2024-06-28 04:17:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:15,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174382522] [2024-06-28 04:17:15,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174382522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:15,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:15,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:15,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937408277] [2024-06-28 04:17:15,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:15,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:15,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:15,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:15,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:15,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:15,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 126 transitions, 1127 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 04:17:15,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:15,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:15,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:16,285 INFO L124 PetriNetUnfolderBase]: 1693/2734 cut-off events. [2024-06-28 04:17:16,285 INFO L125 PetriNetUnfolderBase]: For 38237/38252 co-relation queries the response was YES. [2024-06-28 04:17:16,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14558 conditions, 2734 events. 1693/2734 cut-off events. For 38237/38252 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14449 event pairs, 458 based on Foata normal form. 2/2729 useless extension candidates. Maximal degree in co-relation 14504. Up to 2571 conditions per place. [2024-06-28 04:17:16,305 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 121 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2024-06-28 04:17:16,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 159 transitions, 1635 flow [2024-06-28 04:17:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:16,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 04:17:16,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-28 04:17:16,308 INFO L175 Difference]: Start difference. First operand has 119 places, 126 transitions, 1127 flow. Second operand 7 states and 118 transitions. [2024-06-28 04:17:16,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 159 transitions, 1635 flow [2024-06-28 04:17:16,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 159 transitions, 1553 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 04:17:16,356 INFO L231 Difference]: Finished difference. Result has 123 places, 138 transitions, 1258 flow [2024-06-28 04:17:16,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1049, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1258, PETRI_PLACES=123, PETRI_TRANSITIONS=138} [2024-06-28 04:17:16,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-28 04:17:16,357 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 138 transitions, 1258 flow [2024-06-28 04:17:16,358 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 04:17:16,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:16,358 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 04:17:16,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:17:16,358 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:17:16,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:16,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1471463296, now seen corresponding path program 1 times [2024-06-28 04:17:16,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:16,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360647307] [2024-06-28 04:17:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:16,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:18,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:18,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360647307] [2024-06-28 04:17:18,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360647307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:18,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:18,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:18,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459848141] [2024-06-28 04:17:18,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:18,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:18,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:18,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:17:18,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 138 transitions, 1258 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:18,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:18,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:17:18,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:19,259 INFO L124 PetriNetUnfolderBase]: 1800/2853 cut-off events. [2024-06-28 04:17:19,259 INFO L125 PetriNetUnfolderBase]: For 41415/41417 co-relation queries the response was YES. [2024-06-28 04:17:19,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15498 conditions, 2853 events. 1800/2853 cut-off events. For 41415/41417 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14916 event pairs, 457 based on Foata normal form. 2/2853 useless extension candidates. Maximal degree in co-relation 15441. Up to 2772 conditions per place. [2024-06-28 04:17:19,280 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 14 changer transitions 0/163 dead transitions. [2024-06-28 04:17:19,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 163 transitions, 1699 flow [2024-06-28 04:17:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-28 04:17:19,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-28 04:17:19,282 INFO L175 Difference]: Start difference. First operand has 123 places, 138 transitions, 1258 flow. Second operand 7 states and 105 transitions. [2024-06-28 04:17:19,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 163 transitions, 1699 flow [2024-06-28 04:17:19,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 163 transitions, 1651 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-28 04:17:19,334 INFO L231 Difference]: Finished difference. Result has 131 places, 146 transitions, 1343 flow [2024-06-28 04:17:19,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1343, PETRI_PLACES=131, PETRI_TRANSITIONS=146} [2024-06-28 04:17:19,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-28 04:17:19,335 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 146 transitions, 1343 flow [2024-06-28 04:17:19,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:19,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:19,336 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 04:17:19,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:17:19,336 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:17:19,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:19,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1471463141, now seen corresponding path program 2 times [2024-06-28 04:17:19,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:19,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290092728] [2024-06-28 04:17:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:19,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:22,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:22,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290092728] [2024-06-28 04:17:22,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290092728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:22,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:22,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:22,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442470804] [2024-06-28 04:17:22,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:22,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:22,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:22,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:22,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:22,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:22,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 146 transitions, 1343 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 04:17:22,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:22,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:22,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:22,823 INFO L124 PetriNetUnfolderBase]: 1699/2741 cut-off events. [2024-06-28 04:17:22,823 INFO L125 PetriNetUnfolderBase]: For 44224/44239 co-relation queries the response was YES. [2024-06-28 04:17:22,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15312 conditions, 2741 events. 1699/2741 cut-off events. For 44224/44239 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14521 event pairs, 455 based on Foata normal form. 3/2737 useless extension candidates. Maximal degree in co-relation 15250. Up to 2583 conditions per place. [2024-06-28 04:17:22,842 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 125 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2024-06-28 04:17:22,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 166 transitions, 1747 flow [2024-06-28 04:17:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 04:17:22,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-28 04:17:22,843 INFO L175 Difference]: Start difference. First operand has 131 places, 146 transitions, 1343 flow. Second operand 7 states and 113 transitions. [2024-06-28 04:17:22,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 166 transitions, 1747 flow [2024-06-28 04:17:22,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 166 transitions, 1711 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 04:17:22,903 INFO L231 Difference]: Finished difference. Result has 136 places, 150 transitions, 1435 flow [2024-06-28 04:17:22,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1435, PETRI_PLACES=136, PETRI_TRANSITIONS=150} [2024-06-28 04:17:22,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-28 04:17:22,903 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 150 transitions, 1435 flow [2024-06-28 04:17:22,903 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 04:17:22,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:22,904 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 04:17:22,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:17:22,904 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 04:17:22,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:22,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1260550585, now seen corresponding path program 3 times [2024-06-28 04:17:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:22,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106607096] [2024-06-28 04:17:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:22,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:25,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:25,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106607096] [2024-06-28 04:17:25,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106607096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:25,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:25,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:25,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379079569] [2024-06-28 04:17:25,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:25,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:25,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:25,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:25,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:25,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:25,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 1435 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 04:17:25,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:25,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:25,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:25,926 INFO L124 PetriNetUnfolderBase]: 1704/2742 cut-off events. [2024-06-28 04:17:25,926 INFO L125 PetriNetUnfolderBase]: For 48516/48531 co-relation queries the response was YES. [2024-06-28 04:17:25,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15934 conditions, 2742 events. 1704/2742 cut-off events. For 48516/48531 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14458 event pairs, 448 based on Foata normal form. 3/2734 useless extension candidates. Maximal degree in co-relation 15870. Up to 2599 conditions per place. [2024-06-28 04:17:25,945 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 124 selfloop transitions, 32 changer transitions 0/167 dead transitions. [2024-06-28 04:17:25,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 167 transitions, 1838 flow [2024-06-28 04:17:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 04:17:25,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-28 04:17:25,947 INFO L175 Difference]: Start difference. First operand has 136 places, 150 transitions, 1435 flow. Second operand 7 states and 110 transitions. [2024-06-28 04:17:25,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 167 transitions, 1838 flow [2024-06-28 04:17:26,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 167 transitions, 1730 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 04:17:26,010 INFO L231 Difference]: Finished difference. Result has 139 places, 156 transitions, 1487 flow [2024-06-28 04:17:26,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1487, PETRI_PLACES=139, PETRI_TRANSITIONS=156} [2024-06-28 04:17:26,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-28 04:17:26,011 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 156 transitions, 1487 flow [2024-06-28 04:17:26,012 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 04:17:26,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:26,012 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 04:17:26,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:17:26,012 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:17:26,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:26,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1260550430, now seen corresponding path program 2 times [2024-06-28 04:17:26,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:26,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807361372] [2024-06-28 04:17:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:26,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:27,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807361372] [2024-06-28 04:17:27,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807361372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:27,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:27,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:27,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707496513] [2024-06-28 04:17:27,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:27,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:27,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:27,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:27,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:27,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:17:27,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 156 transitions, 1487 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:27,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:27,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:17:27,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:28,799 INFO L124 PetriNetUnfolderBase]: 1813/2874 cut-off events. [2024-06-28 04:17:28,799 INFO L125 PetriNetUnfolderBase]: For 52983/52985 co-relation queries the response was YES. [2024-06-28 04:17:28,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16967 conditions, 2874 events. 1813/2874 cut-off events. For 52983/52985 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15031 event pairs, 453 based on Foata normal form. 2/2874 useless extension candidates. Maximal degree in co-relation 16901. Up to 2780 conditions per place. [2024-06-28 04:17:28,819 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 158 selfloop transitions, 21 changer transitions 0/183 dead transitions. [2024-06-28 04:17:28,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 183 transitions, 2068 flow [2024-06-28 04:17:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-28 04:17:28,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-28 04:17:28,821 INFO L175 Difference]: Start difference. First operand has 139 places, 156 transitions, 1487 flow. Second operand 7 states and 106 transitions. [2024-06-28 04:17:28,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 183 transitions, 2068 flow [2024-06-28 04:17:28,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 183 transitions, 1978 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 04:17:28,889 INFO L231 Difference]: Finished difference. Result has 143 places, 167 transitions, 1594 flow [2024-06-28 04:17:28,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1594, PETRI_PLACES=143, PETRI_TRANSITIONS=167} [2024-06-28 04:17:28,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-28 04:17:28,890 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 167 transitions, 1594 flow [2024-06-28 04:17:28,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:28,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:28,891 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 04:17:28,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:17:28,891 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:17:28,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:28,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1260343040, now seen corresponding path program 3 times [2024-06-28 04:17:28,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:28,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878307527] [2024-06-28 04:17:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:28,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:30,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:30,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878307527] [2024-06-28 04:17:30,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878307527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:30,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:30,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:30,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641566042] [2024-06-28 04:17:30,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:30,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:30,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:30,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:30,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:30,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:17:30,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 167 transitions, 1594 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:30,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:30,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:17:30,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:31,852 INFO L124 PetriNetUnfolderBase]: 1804/2862 cut-off events. [2024-06-28 04:17:31,852 INFO L125 PetriNetUnfolderBase]: For 56275/56277 co-relation queries the response was YES. [2024-06-28 04:17:31,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17217 conditions, 2862 events. 1804/2862 cut-off events. For 56275/56277 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14949 event pairs, 452 based on Foata normal form. 3/2863 useless extension candidates. Maximal degree in co-relation 17149. Up to 2781 conditions per place. [2024-06-28 04:17:31,873 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 16 changer transitions 0/182 dead transitions. [2024-06-28 04:17:31,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 182 transitions, 2002 flow [2024-06-28 04:17:31,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-28 04:17:31,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554006968641115 [2024-06-28 04:17:31,875 INFO L175 Difference]: Start difference. First operand has 143 places, 167 transitions, 1594 flow. Second operand 7 states and 102 transitions. [2024-06-28 04:17:31,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 182 transitions, 2002 flow [2024-06-28 04:17:31,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 182 transitions, 1908 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 04:17:31,947 INFO L231 Difference]: Finished difference. Result has 146 places, 168 transitions, 1553 flow [2024-06-28 04:17:31,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1553, PETRI_PLACES=146, PETRI_TRANSITIONS=168} [2024-06-28 04:17:31,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-28 04:17:31,947 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 168 transitions, 1553 flow [2024-06-28 04:17:31,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:31,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:31,948 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 04:17:31,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:17:31,948 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:17:31,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1260335104, now seen corresponding path program 1 times [2024-06-28 04:17:31,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:31,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068975212] [2024-06-28 04:17:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:31,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:35,092 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 04:17:35,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:35,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068975212] [2024-06-28 04:17:35,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068975212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:35,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:35,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:35,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010026632] [2024-06-28 04:17:35,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:35,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:35,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:35,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:17:35,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 168 transitions, 1553 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:17:35,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:35,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:17:35,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:36,201 INFO L124 PetriNetUnfolderBase]: 1799/2855 cut-off events. [2024-06-28 04:17:36,201 INFO L125 PetriNetUnfolderBase]: For 58734/58736 co-relation queries the response was YES. [2024-06-28 04:17:36,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17114 conditions, 2855 events. 1799/2855 cut-off events. For 58734/58736 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14900 event pairs, 446 based on Foata normal form. 2/2855 useless extension candidates. Maximal degree in co-relation 17045. Up to 2777 conditions per place. [2024-06-28 04:17:36,220 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 167 selfloop transitions, 13 changer transitions 0/184 dead transitions. [2024-06-28 04:17:36,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 184 transitions, 1976 flow [2024-06-28 04:17:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-28 04:17:36,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-28 04:17:36,222 INFO L175 Difference]: Start difference. First operand has 146 places, 168 transitions, 1553 flow. Second operand 7 states and 101 transitions. [2024-06-28 04:17:36,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 184 transitions, 1976 flow [2024-06-28 04:17:36,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 184 transitions, 1950 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 04:17:36,292 INFO L231 Difference]: Finished difference. Result has 148 places, 170 transitions, 1587 flow [2024-06-28 04:17:36,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1587, PETRI_PLACES=148, PETRI_TRANSITIONS=170} [2024-06-28 04:17:36,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-28 04:17:36,294 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 170 transitions, 1587 flow [2024-06-28 04:17:36,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:17:36,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:36,295 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 04:17:36,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:17:36,295 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:17:36,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:36,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1632137523, now seen corresponding path program 1 times [2024-06-28 04:17:36,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:36,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965394686] [2024-06-28 04:17:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:36,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:38,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:38,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965394686] [2024-06-28 04:17:38,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965394686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:38,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:38,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:38,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404384928] [2024-06-28 04:17:38,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:38,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:38,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:38,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 170 transitions, 1587 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 04:17:38,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:38,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:38,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:39,691 INFO L124 PetriNetUnfolderBase]: 1765/2830 cut-off events. [2024-06-28 04:17:39,692 INFO L125 PetriNetUnfolderBase]: For 64246/64261 co-relation queries the response was YES. [2024-06-28 04:17:39,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17317 conditions, 2830 events. 1765/2830 cut-off events. For 64246/64261 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15003 event pairs, 405 based on Foata normal form. 4/2827 useless extension candidates. Maximal degree in co-relation 17247. Up to 2548 conditions per place. [2024-06-28 04:17:39,711 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 149 selfloop transitions, 38 changer transitions 0/202 dead transitions. [2024-06-28 04:17:39,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 202 transitions, 2147 flow [2024-06-28 04:17:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:17:39,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-28 04:17:39,713 INFO L175 Difference]: Start difference. First operand has 148 places, 170 transitions, 1587 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:17:39,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 202 transitions, 2147 flow [2024-06-28 04:17:39,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 202 transitions, 2106 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 04:17:39,786 INFO L231 Difference]: Finished difference. Result has 151 places, 174 transitions, 1691 flow [2024-06-28 04:17:39,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1691, PETRI_PLACES=151, PETRI_TRANSITIONS=174} [2024-06-28 04:17:39,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-28 04:17:39,787 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 174 transitions, 1691 flow [2024-06-28 04:17:39,787 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 04:17:39,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:39,787 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 04:17:39,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:17:39,787 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:17:39,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1632076949, now seen corresponding path program 1 times [2024-06-28 04:17:39,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:39,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274764559] [2024-06-28 04:17:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:43,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:43,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274764559] [2024-06-28 04:17:43,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274764559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:43,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:43,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:43,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253631672] [2024-06-28 04:17:43,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:43,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:43,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:43,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:43,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:43,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:17:43,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 174 transitions, 1691 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:17:43,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:43,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:17:43,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:44,587 INFO L124 PetriNetUnfolderBase]: 1867/2953 cut-off events. [2024-06-28 04:17:44,587 INFO L125 PetriNetUnfolderBase]: For 69411/69413 co-relation queries the response was YES. [2024-06-28 04:17:44,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18445 conditions, 2953 events. 1867/2953 cut-off events. For 69411/69413 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15508 event pairs, 452 based on Foata normal form. 2/2953 useless extension candidates. Maximal degree in co-relation 18374. Up to 2834 conditions per place. [2024-06-28 04:17:44,610 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 181 selfloop transitions, 26 changer transitions 0/211 dead transitions. [2024-06-28 04:17:44,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 211 transitions, 2356 flow [2024-06-28 04:17:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:17:44,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-28 04:17:44,614 INFO L175 Difference]: Start difference. First operand has 151 places, 174 transitions, 1691 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:17:44,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 211 transitions, 2356 flow [2024-06-28 04:17:44,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 211 transitions, 2273 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 04:17:44,700 INFO L231 Difference]: Finished difference. Result has 157 places, 186 transitions, 1828 flow [2024-06-28 04:17:44,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1828, PETRI_PLACES=157, PETRI_TRANSITIONS=186} [2024-06-28 04:17:44,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-28 04:17:44,701 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 186 transitions, 1828 flow [2024-06-28 04:17:44,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:17:44,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:44,701 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 04:17:44,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:17:44,701 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 04:17:44,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:44,702 INFO L85 PathProgramCache]: Analyzing trace with hash -706086963, now seen corresponding path program 2 times [2024-06-28 04:17:44,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:44,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938207420] [2024-06-28 04:17:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:44,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:59,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:59,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938207420] [2024-06-28 04:17:59,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938207420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:59,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:59,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:59,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866376280] [2024-06-28 04:17:59,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:59,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:59,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:59,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:59,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:59,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:59,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 186 transitions, 1828 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 04:17:59,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:59,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:59,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:00,668 INFO L124 PetriNetUnfolderBase]: 1854/2959 cut-off events. [2024-06-28 04:18:00,669 INFO L125 PetriNetUnfolderBase]: For 80420/80435 co-relation queries the response was YES. [2024-06-28 04:18:00,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18882 conditions, 2959 events. 1854/2959 cut-off events. For 80420/80435 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15836 event pairs, 455 based on Foata normal form. 15/2967 useless extension candidates. Maximal degree in co-relation 18807. Up to 2636 conditions per place. [2024-06-28 04:18:00,689 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 146 selfloop transitions, 54 changer transitions 0/218 dead transitions. [2024-06-28 04:18:00,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 218 transitions, 2432 flow [2024-06-28 04:18:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:00,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:18:00,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:18:00,691 INFO L175 Difference]: Start difference. First operand has 157 places, 186 transitions, 1828 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:18:00,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 218 transitions, 2432 flow [2024-06-28 04:18:00,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 218 transitions, 2382 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 04:18:00,796 INFO L231 Difference]: Finished difference. Result has 163 places, 193 transitions, 2042 flow [2024-06-28 04:18:00,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2042, PETRI_PLACES=163, PETRI_TRANSITIONS=193} [2024-06-28 04:18:00,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-28 04:18:00,796 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 193 transitions, 2042 flow [2024-06-28 04:18:00,796 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 04:18:00,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:00,797 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 04:18:00,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:18:00,797 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:18:00,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:00,797 INFO L85 PathProgramCache]: Analyzing trace with hash -703290453, now seen corresponding path program 3 times [2024-06-28 04:18:00,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:00,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063070028] [2024-06-28 04:18:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:00,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:04,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:04,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063070028] [2024-06-28 04:18:04,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063070028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:04,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:04,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:04,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016697464] [2024-06-28 04:18:04,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:04,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:04,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:04,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:04,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 193 transitions, 2042 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 04:18:04,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:04,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:04,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:05,348 INFO L124 PetriNetUnfolderBase]: 1872/2989 cut-off events. [2024-06-28 04:18:05,348 INFO L125 PetriNetUnfolderBase]: For 89262/89277 co-relation queries the response was YES. [2024-06-28 04:18:05,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19814 conditions, 2989 events. 1872/2989 cut-off events. For 89262/89277 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16039 event pairs, 457 based on Foata normal form. 12/2994 useless extension candidates. Maximal degree in co-relation 19736. Up to 2735 conditions per place. [2024-06-28 04:18:05,371 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 33 changer transitions 0/216 dead transitions. [2024-06-28 04:18:05,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 216 transitions, 2564 flow [2024-06-28 04:18:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 04:18:05,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:18:05,373 INFO L175 Difference]: Start difference. First operand has 163 places, 193 transitions, 2042 flow. Second operand 8 states and 128 transitions. [2024-06-28 04:18:05,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 216 transitions, 2564 flow [2024-06-28 04:18:05,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 216 transitions, 2465 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 04:18:05,481 INFO L231 Difference]: Finished difference. Result has 166 places, 195 transitions, 2056 flow [2024-06-28 04:18:05,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2056, PETRI_PLACES=166, PETRI_TRANSITIONS=195} [2024-06-28 04:18:05,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-28 04:18:05,482 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 195 transitions, 2056 flow [2024-06-28 04:18:05,482 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 04:18:05,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:05,482 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 04:18:05,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:18:05,483 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:18:05,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:05,483 INFO L85 PathProgramCache]: Analyzing trace with hash -703290329, now seen corresponding path program 2 times [2024-06-28 04:18:05,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:05,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212376328] [2024-06-28 04:18:05,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:05,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:08,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:08,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212376328] [2024-06-28 04:18:08,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212376328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:08,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:08,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:08,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449153776] [2024-06-28 04:18:08,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:08,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:08,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:08,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:08,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:08,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:08,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 195 transitions, 2056 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:08,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:08,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:08,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:09,765 INFO L124 PetriNetUnfolderBase]: 1936/3062 cut-off events. [2024-06-28 04:18:09,766 INFO L125 PetriNetUnfolderBase]: For 84125/84127 co-relation queries the response was YES. [2024-06-28 04:18:09,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20354 conditions, 3062 events. 1936/3062 cut-off events. For 84125/84127 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16205 event pairs, 458 based on Foata normal form. 2/3062 useless extension candidates. Maximal degree in co-relation 20275. Up to 2966 conditions per place. [2024-06-28 04:18:09,787 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 194 selfloop transitions, 20 changer transitions 0/218 dead transitions. [2024-06-28 04:18:09,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 218 transitions, 2559 flow [2024-06-28 04:18:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:18:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:18:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-28 04:18:09,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34688346883468835 [2024-06-28 04:18:09,788 INFO L175 Difference]: Start difference. First operand has 166 places, 195 transitions, 2056 flow. Second operand 9 states and 128 transitions. [2024-06-28 04:18:09,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 218 transitions, 2559 flow [2024-06-28 04:18:09,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 218 transitions, 2464 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 04:18:09,893 INFO L231 Difference]: Finished difference. Result has 170 places, 198 transitions, 2037 flow [2024-06-28 04:18:09,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1967, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2037, PETRI_PLACES=170, PETRI_TRANSITIONS=198} [2024-06-28 04:18:09,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-28 04:18:09,894 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 198 transitions, 2037 flow [2024-06-28 04:18:09,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:09,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:09,894 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 04:18:09,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:18:09,894 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:18:09,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:09,894 INFO L85 PathProgramCache]: Analyzing trace with hash -415926285, now seen corresponding path program 3 times [2024-06-28 04:18:09,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:09,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297799398] [2024-06-28 04:18:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:09,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:12,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:12,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297799398] [2024-06-28 04:18:12,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297799398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:12,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:12,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:12,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786644533] [2024-06-28 04:18:12,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:12,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:12,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:12,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:12,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:12,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 198 transitions, 2037 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:12,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:12,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:12,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:14,042 INFO L124 PetriNetUnfolderBase]: 2035/3204 cut-off events. [2024-06-28 04:18:14,042 INFO L125 PetriNetUnfolderBase]: For 94849/94851 co-relation queries the response was YES. [2024-06-28 04:18:14,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21600 conditions, 3204 events. 2035/3204 cut-off events. For 94849/94851 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17016 event pairs, 403 based on Foata normal form. 2/3204 useless extension candidates. Maximal degree in co-relation 21519. Up to 2869 conditions per place. [2024-06-28 04:18:14,072 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 175 selfloop transitions, 63 changer transitions 0/242 dead transitions. [2024-06-28 04:18:14,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 242 transitions, 2894 flow [2024-06-28 04:18:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:18:14,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-28 04:18:14,077 INFO L175 Difference]: Start difference. First operand has 170 places, 198 transitions, 2037 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:18:14,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 242 transitions, 2894 flow [2024-06-28 04:18:14,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 242 transitions, 2870 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 04:18:14,210 INFO L231 Difference]: Finished difference. Result has 174 places, 218 transitions, 2462 flow [2024-06-28 04:18:14,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2462, PETRI_PLACES=174, PETRI_TRANSITIONS=218} [2024-06-28 04:18:14,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-28 04:18:14,210 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 218 transitions, 2462 flow [2024-06-28 04:18:14,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:14,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:14,211 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 04:18:14,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:18:14,211 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 04:18:14,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1251389881, now seen corresponding path program 4 times [2024-06-28 04:18:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:14,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203554595] [2024-06-28 04:18:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:14,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:16,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:16,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203554595] [2024-06-28 04:18:16,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203554595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:16,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:16,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:16,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819459355] [2024-06-28 04:18:16,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:16,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:16,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:16,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:16,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 218 transitions, 2462 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:16,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:16,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:16,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:17,470 INFO L124 PetriNetUnfolderBase]: 2045/3217 cut-off events. [2024-06-28 04:18:17,470 INFO L125 PetriNetUnfolderBase]: For 103381/103383 co-relation queries the response was YES. [2024-06-28 04:18:17,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23027 conditions, 3217 events. 2045/3217 cut-off events. For 103381/103383 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17085 event pairs, 463 based on Foata normal form. 2/3217 useless extension candidates. Maximal degree in co-relation 22943. Up to 3119 conditions per place. [2024-06-28 04:18:17,501 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 204 selfloop transitions, 30 changer transitions 0/238 dead transitions. [2024-06-28 04:18:17,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 238 transitions, 3040 flow [2024-06-28 04:18:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-28 04:18:17,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-28 04:18:17,503 INFO L175 Difference]: Start difference. First operand has 174 places, 218 transitions, 2462 flow. Second operand 8 states and 117 transitions. [2024-06-28 04:18:17,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 238 transitions, 3040 flow [2024-06-28 04:18:17,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 238 transitions, 2988 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 04:18:17,655 INFO L231 Difference]: Finished difference. Result has 178 places, 221 transitions, 2531 flow [2024-06-28 04:18:17,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2531, PETRI_PLACES=178, PETRI_TRANSITIONS=221} [2024-06-28 04:18:17,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-28 04:18:17,656 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 221 transitions, 2531 flow [2024-06-28 04:18:17,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:17,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:17,657 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 04:18:17,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:18:17,657 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 04:18:17,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:17,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1251385107, now seen corresponding path program 4 times [2024-06-28 04:18:17,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:17,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883321558] [2024-06-28 04:18:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:17,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:20,078 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 04:18:20,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:20,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883321558] [2024-06-28 04:18:20,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883321558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:20,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:20,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:20,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365635287] [2024-06-28 04:18:20,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:20,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:20,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:20,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:20,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 221 transitions, 2531 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 04:18:20,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:20,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:20,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:21,351 INFO L124 PetriNetUnfolderBase]: 2002/3177 cut-off events. [2024-06-28 04:18:21,351 INFO L125 PetriNetUnfolderBase]: For 114585/114588 co-relation queries the response was YES. [2024-06-28 04:18:21,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23188 conditions, 3177 events. 2002/3177 cut-off events. For 114585/114588 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17111 event pairs, 455 based on Foata normal form. 12/3182 useless extension candidates. Maximal degree in co-relation 23103. Up to 2866 conditions per place. [2024-06-28 04:18:21,381 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 164 selfloop transitions, 61 changer transitions 0/251 dead transitions. [2024-06-28 04:18:21,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 251 transitions, 3260 flow [2024-06-28 04:18:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:18:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:18:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 04:18:21,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:18:21,385 INFO L175 Difference]: Start difference. First operand has 178 places, 221 transitions, 2531 flow. Second operand 9 states and 144 transitions. [2024-06-28 04:18:21,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 251 transitions, 3260 flow [2024-06-28 04:18:21,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 251 transitions, 3141 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 04:18:21,540 INFO L231 Difference]: Finished difference. Result has 182 places, 229 transitions, 2704 flow [2024-06-28 04:18:21,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2704, PETRI_PLACES=182, PETRI_TRANSITIONS=229} [2024-06-28 04:18:21,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-28 04:18:21,549 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 229 transitions, 2704 flow [2024-06-28 04:18:21,550 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 04:18:21,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:21,550 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 04:18:21,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:18:21,550 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:18:21,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:21,551 INFO L85 PathProgramCache]: Analyzing trace with hash -422360025, now seen corresponding path program 5 times [2024-06-28 04:18:21,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:21,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671733230] [2024-06-28 04:18:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:21,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:23,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:23,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671733230] [2024-06-28 04:18:23,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671733230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:23,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:23,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:23,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664638673] [2024-06-28 04:18:23,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:23,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:23,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:23,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:23,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:23,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:23,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 229 transitions, 2704 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:23,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:23,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:23,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:24,771 INFO L124 PetriNetUnfolderBase]: 2081/3272 cut-off events. [2024-06-28 04:18:24,772 INFO L125 PetriNetUnfolderBase]: For 113741/113743 co-relation queries the response was YES. [2024-06-28 04:18:24,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24257 conditions, 3272 events. 2081/3272 cut-off events. For 113741/113743 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17403 event pairs, 465 based on Foata normal form. 2/3272 useless extension candidates. Maximal degree in co-relation 24170. Up to 3153 conditions per place. [2024-06-28 04:18:24,802 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 212 selfloop transitions, 41 changer transitions 0/257 dead transitions. [2024-06-28 04:18:24,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 257 transitions, 3486 flow [2024-06-28 04:18:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:18:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:18:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-28 04:18:24,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34959349593495936 [2024-06-28 04:18:24,804 INFO L175 Difference]: Start difference. First operand has 182 places, 229 transitions, 2704 flow. Second operand 9 states and 129 transitions. [2024-06-28 04:18:24,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 257 transitions, 3486 flow [2024-06-28 04:18:24,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 257 transitions, 3385 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 04:18:24,942 INFO L231 Difference]: Finished difference. Result has 187 places, 238 transitions, 2861 flow [2024-06-28 04:18:24,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2607, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2861, PETRI_PLACES=187, PETRI_TRANSITIONS=238} [2024-06-28 04:18:24,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-28 04:18:24,942 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 238 transitions, 2861 flow [2024-06-28 04:18:24,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:24,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:24,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:24,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:18:24,943 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 04:18:24,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:24,943 INFO L85 PathProgramCache]: Analyzing trace with hash 804728650, now seen corresponding path program 1 times [2024-06-28 04:18:24,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:24,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839991704] [2024-06-28 04:18:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:24,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:27,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:27,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839991704] [2024-06-28 04:18:27,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839991704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:27,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:27,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:27,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653315753] [2024-06-28 04:18:27,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:27,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:27,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:27,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:27,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:27,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:27,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 238 transitions, 2861 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:27,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:27,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:27,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:28,876 INFO L124 PetriNetUnfolderBase]: 2089/3279 cut-off events. [2024-06-28 04:18:28,877 INFO L125 PetriNetUnfolderBase]: For 120735/120743 co-relation queries the response was YES. [2024-06-28 04:18:28,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24716 conditions, 3279 events. 2089/3279 cut-off events. For 120735/120743 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17287 event pairs, 352 based on Foata normal form. 3/3278 useless extension candidates. Maximal degree in co-relation 24626. Up to 3098 conditions per place. [2024-06-28 04:18:28,905 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 233 selfloop transitions, 22 changer transitions 0/259 dead transitions. [2024-06-28 04:18:28,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 259 transitions, 3573 flow [2024-06-28 04:18:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:18:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:18:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-28 04:18:28,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-28 04:18:28,909 INFO L175 Difference]: Start difference. First operand has 187 places, 238 transitions, 2861 flow. Second operand 6 states and 98 transitions. [2024-06-28 04:18:28,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 259 transitions, 3573 flow [2024-06-28 04:18:29,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 259 transitions, 3488 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-28 04:18:29,094 INFO L231 Difference]: Finished difference. Result has 190 places, 242 transitions, 2917 flow [2024-06-28 04:18:29,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2917, PETRI_PLACES=190, PETRI_TRANSITIONS=242} [2024-06-28 04:18:29,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-28 04:18:29,104 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 242 transitions, 2917 flow [2024-06-28 04:18:29,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:29,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:29,105 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 04:18:29,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:18:29,105 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 04:18:29,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2073423302, now seen corresponding path program 2 times [2024-06-28 04:18:29,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:29,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029525412] [2024-06-28 04:18:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:29,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:31,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:31,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029525412] [2024-06-28 04:18:31,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029525412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:31,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:31,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:31,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489671989] [2024-06-28 04:18:31,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:31,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:31,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:31,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:31,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:31,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 242 transitions, 2917 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:31,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:31,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:31,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:32,360 INFO L124 PetriNetUnfolderBase]: 2084/3272 cut-off events. [2024-06-28 04:18:32,361 INFO L125 PetriNetUnfolderBase]: For 124493/124501 co-relation queries the response was YES. [2024-06-28 04:18:32,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24785 conditions, 3272 events. 2084/3272 cut-off events. For 124493/124501 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17353 event pairs, 464 based on Foata normal form. 3/3271 useless extension candidates. Maximal degree in co-relation 24693. Up to 3148 conditions per place. [2024-06-28 04:18:32,389 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 227 selfloop transitions, 22 changer transitions 0/253 dead transitions. [2024-06-28 04:18:32,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 253 transitions, 3441 flow [2024-06-28 04:18:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:18:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:18:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-28 04:18:32,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 04:18:32,391 INFO L175 Difference]: Start difference. First operand has 190 places, 242 transitions, 2917 flow. Second operand 6 states and 93 transitions. [2024-06-28 04:18:32,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 253 transitions, 3441 flow [2024-06-28 04:18:32,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 253 transitions, 3358 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-28 04:18:32,557 INFO L231 Difference]: Finished difference. Result has 194 places, 242 transitions, 2883 flow [2024-06-28 04:18:32,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2883, PETRI_PLACES=194, PETRI_TRANSITIONS=242} [2024-06-28 04:18:32,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-28 04:18:32,558 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 242 transitions, 2883 flow [2024-06-28 04:18:32,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:32,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:32,559 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 04:18:32,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:18:32,559 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 04:18:32,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:32,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1872699320, now seen corresponding path program 1 times [2024-06-28 04:18:32,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:32,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618148070] [2024-06-28 04:18:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:32,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:35,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:35,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618148070] [2024-06-28 04:18:35,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618148070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:35,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:35,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:35,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424405424] [2024-06-28 04:18:35,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:35,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:35,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:35,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:35,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:35,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:35,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 242 transitions, 2883 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:35,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:35,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:35,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:36,332 INFO L124 PetriNetUnfolderBase]: 2089/3281 cut-off events. [2024-06-28 04:18:36,333 INFO L125 PetriNetUnfolderBase]: For 129346/129354 co-relation queries the response was YES. [2024-06-28 04:18:36,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24950 conditions, 3281 events. 2089/3281 cut-off events. For 129346/129354 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17448 event pairs, 466 based on Foata normal form. 2/3279 useless extension candidates. Maximal degree in co-relation 24856. Up to 3047 conditions per place. [2024-06-28 04:18:36,365 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 201 selfloop transitions, 54 changer transitions 0/259 dead transitions. [2024-06-28 04:18:36,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 259 transitions, 3497 flow [2024-06-28 04:18:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:18:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:18:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 04:18:36,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-28 04:18:36,367 INFO L175 Difference]: Start difference. First operand has 194 places, 242 transitions, 2883 flow. Second operand 6 states and 101 transitions. [2024-06-28 04:18:36,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 259 transitions, 3497 flow [2024-06-28 04:18:36,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 259 transitions, 3446 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 04:18:36,566 INFO L231 Difference]: Finished difference. Result has 195 places, 245 transitions, 3034 flow [2024-06-28 04:18:36,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3034, PETRI_PLACES=195, PETRI_TRANSITIONS=245} [2024-06-28 04:18:36,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-28 04:18:36,567 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 245 transitions, 3034 flow [2024-06-28 04:18:36,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:36,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:36,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:36,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:18:36,567 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 04:18:36,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2012737951, now seen corresponding path program 1 times [2024-06-28 04:18:36,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:36,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674814319] [2024-06-28 04:18:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:36,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:39,022 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 04:18:39,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:39,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674814319] [2024-06-28 04:18:39,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674814319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:39,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:39,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:39,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230654227] [2024-06-28 04:18:39,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:39,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:39,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:39,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:39,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:39,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:39,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 245 transitions, 3034 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:39,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:39,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:39,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:40,133 INFO L124 PetriNetUnfolderBase]: 2119/3330 cut-off events. [2024-06-28 04:18:40,133 INFO L125 PetriNetUnfolderBase]: For 139471/139481 co-relation queries the response was YES. [2024-06-28 04:18:40,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25812 conditions, 3330 events. 2119/3330 cut-off events. For 139471/139481 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17773 event pairs, 469 based on Foata normal form. 12/3339 useless extension candidates. Maximal degree in co-relation 25717. Up to 3184 conditions per place. [2024-06-28 04:18:40,162 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 236 selfloop transitions, 30 changer transitions 0/270 dead transitions. [2024-06-28 04:18:40,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 270 transitions, 3754 flow [2024-06-28 04:18:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:18:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:18:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 04:18:40,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:18:40,165 INFO L175 Difference]: Start difference. First operand has 195 places, 245 transitions, 3034 flow. Second operand 7 states and 112 transitions. [2024-06-28 04:18:40,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 270 transitions, 3754 flow [2024-06-28 04:18:40,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 270 transitions, 3604 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 04:18:40,334 INFO L231 Difference]: Finished difference. Result has 199 places, 253 transitions, 3121 flow [2024-06-28 04:18:40,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3121, PETRI_PLACES=199, PETRI_TRANSITIONS=253} [2024-06-28 04:18:40,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-28 04:18:40,335 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 253 transitions, 3121 flow [2024-06-28 04:18:40,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:40,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:40,335 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 04:18:40,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:18:40,335 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 04:18:40,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:40,336 INFO L85 PathProgramCache]: Analyzing trace with hash 866885034, now seen corresponding path program 2 times [2024-06-28 04:18:40,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:40,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439704486] [2024-06-28 04:18:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:40,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:43,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:43,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439704486] [2024-06-28 04:18:43,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439704486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:43,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:43,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:43,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698541088] [2024-06-28 04:18:43,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:43,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:43,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:43,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:43,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:43,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 253 transitions, 3121 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:43,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:43,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:43,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:44,446 INFO L124 PetriNetUnfolderBase]: 2116/3326 cut-off events. [2024-06-28 04:18:44,447 INFO L125 PetriNetUnfolderBase]: For 143214/143224 co-relation queries the response was YES. [2024-06-28 04:18:44,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26122 conditions, 3326 events. 2116/3326 cut-off events. For 143214/143224 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17710 event pairs, 469 based on Foata normal form. 9/3332 useless extension candidates. Maximal degree in co-relation 26025. Up to 3163 conditions per place. [2024-06-28 04:18:44,476 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 235 selfloop transitions, 33 changer transitions 0/272 dead transitions. [2024-06-28 04:18:44,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 272 transitions, 3779 flow [2024-06-28 04:18:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:18:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:18:44,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 04:18:44,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-28 04:18:44,477 INFO L175 Difference]: Start difference. First operand has 199 places, 253 transitions, 3121 flow. Second operand 7 states and 109 transitions. [2024-06-28 04:18:44,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 272 transitions, 3779 flow [2024-06-28 04:18:44,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 272 transitions, 3669 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-28 04:18:44,665 INFO L231 Difference]: Finished difference. Result has 203 places, 256 transitions, 3170 flow [2024-06-28 04:18:44,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3170, PETRI_PLACES=203, PETRI_TRANSITIONS=256} [2024-06-28 04:18:44,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-28 04:18:44,665 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 256 transitions, 3170 flow [2024-06-28 04:18:44,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:44,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:44,666 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 04:18:44,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:18:44,666 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 04:18:44,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash -148361193, now seen corresponding path program 2 times [2024-06-28 04:18:44,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:44,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878058451] [2024-06-28 04:18:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:46,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:46,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878058451] [2024-06-28 04:18:46,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878058451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:46,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:46,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:18:46,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095484091] [2024-06-28 04:18:46,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:46,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:18:46,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:18:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:18:46,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:46,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 256 transitions, 3170 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:46,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:46,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:46,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:47,876 INFO L124 PetriNetUnfolderBase]: 2188/3434 cut-off events. [2024-06-28 04:18:47,877 INFO L125 PetriNetUnfolderBase]: For 155335/155343 co-relation queries the response was YES. [2024-06-28 04:18:47,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27134 conditions, 3434 events. 2188/3434 cut-off events. For 155335/155343 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18265 event pairs, 448 based on Foata normal form. 9/3439 useless extension candidates. Maximal degree in co-relation 27035. Up to 3213 conditions per place. [2024-06-28 04:18:47,913 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 255 selfloop transitions, 50 changer transitions 0/309 dead transitions. [2024-06-28 04:18:47,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 309 transitions, 4318 flow [2024-06-28 04:18:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:18:47,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-28 04:18:47,914 INFO L175 Difference]: Start difference. First operand has 203 places, 256 transitions, 3170 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:18:47,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 309 transitions, 4318 flow [2024-06-28 04:18:48,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 309 transitions, 4177 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-28 04:18:48,143 INFO L231 Difference]: Finished difference. Result has 210 places, 282 transitions, 3587 flow [2024-06-28 04:18:48,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3587, PETRI_PLACES=210, PETRI_TRANSITIONS=282} [2024-06-28 04:18:48,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-28 04:18:48,144 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 282 transitions, 3587 flow [2024-06-28 04:18:48,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:48,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:48,144 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 04:18:48,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:18:48,145 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 04:18:48,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:48,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1204950091, now seen corresponding path program 3 times [2024-06-28 04:18:48,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:48,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664792210] [2024-06-28 04:18:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:50,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:50,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664792210] [2024-06-28 04:18:50,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664792210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:50,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:50,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:50,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945599820] [2024-06-28 04:18:50,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:50,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:50,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:50,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:50,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:50,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:50,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 282 transitions, 3587 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:50,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:50,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:50,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:51,614 INFO L124 PetriNetUnfolderBase]: 2232/3501 cut-off events. [2024-06-28 04:18:51,614 INFO L125 PetriNetUnfolderBase]: For 165646/165657 co-relation queries the response was YES. [2024-06-28 04:18:51,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28680 conditions, 3501 events. 2232/3501 cut-off events. For 165646/165657 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 18686 event pairs, 468 based on Foata normal form. 8/3504 useless extension candidates. Maximal degree in co-relation 28576. Up to 3247 conditions per place. [2024-06-28 04:18:51,653 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 60 changer transitions 0/311 dead transitions. [2024-06-28 04:18:51,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 311 transitions, 4616 flow [2024-06-28 04:18:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:18:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:18:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 04:18:51,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-28 04:18:51,655 INFO L175 Difference]: Start difference. First operand has 210 places, 282 transitions, 3587 flow. Second operand 7 states and 110 transitions. [2024-06-28 04:18:51,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 311 transitions, 4616 flow [2024-06-28 04:18:51,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 311 transitions, 4464 flow, removed 75 selfloop flow, removed 1 redundant places. [2024-06-28 04:18:51,968 INFO L231 Difference]: Finished difference. Result has 216 places, 293 transitions, 3887 flow [2024-06-28 04:18:51,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3887, PETRI_PLACES=216, PETRI_TRANSITIONS=293} [2024-06-28 04:18:51,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-28 04:18:51,969 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 293 transitions, 3887 flow [2024-06-28 04:18:51,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:51,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:51,970 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 04:18:51,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:18:51,970 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 04:18:51,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1139665223, now seen corresponding path program 4 times [2024-06-28 04:18:51,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:51,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032297071] [2024-06-28 04:18:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:51,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:53,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:53,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032297071] [2024-06-28 04:18:53,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032297071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:53,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:53,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:53,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427966192] [2024-06-28 04:18:53,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:53,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:53,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:53,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:53,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:53,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:53,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 293 transitions, 3887 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:53,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:53,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:53,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:55,348 INFO L124 PetriNetUnfolderBase]: 2256/3541 cut-off events. [2024-06-28 04:18:55,348 INFO L125 PetriNetUnfolderBase]: For 171810/171821 co-relation queries the response was YES. [2024-06-28 04:18:55,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29469 conditions, 3541 events. 2256/3541 cut-off events. For 171810/171821 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18957 event pairs, 468 based on Foata normal form. 7/3543 useless extension candidates. Maximal degree in co-relation 29362. Up to 3261 conditions per place. [2024-06-28 04:18:55,384 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 76 changer transitions 0/329 dead transitions. [2024-06-28 04:18:55,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 329 transitions, 5036 flow [2024-06-28 04:18:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:18:55,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 04:18:55,386 INFO L175 Difference]: Start difference. First operand has 216 places, 293 transitions, 3887 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:18:55,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 329 transitions, 5036 flow [2024-06-28 04:18:55,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 329 transitions, 4804 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-28 04:18:55,678 INFO L231 Difference]: Finished difference. Result has 221 places, 308 transitions, 4235 flow [2024-06-28 04:18:55,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3724, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4235, PETRI_PLACES=221, PETRI_TRANSITIONS=308} [2024-06-28 04:18:55,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-28 04:18:55,679 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 308 transitions, 4235 flow [2024-06-28 04:18:55,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:18:55,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:55,680 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 04:18:55,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:18:55,680 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 04:18:55,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1438957631, now seen corresponding path program 1 times [2024-06-28 04:18:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:55,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818162657] [2024-06-28 04:18:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:58,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:58,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818162657] [2024-06-28 04:18:58,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818162657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:58,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:58,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:18:58,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246824109] [2024-06-28 04:18:58,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:58,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:18:58,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:18:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:18:58,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:18:58,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 308 transitions, 4235 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:58,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:58,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:18:58,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:00,292 INFO L124 PetriNetUnfolderBase]: 2300/3609 cut-off events. [2024-06-28 04:19:00,293 INFO L125 PetriNetUnfolderBase]: For 186406/186417 co-relation queries the response was YES. [2024-06-28 04:19:00,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30435 conditions, 3609 events. 2300/3609 cut-off events. For 186406/186417 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19402 event pairs, 460 based on Foata normal form. 13/3617 useless extension candidates. Maximal degree in co-relation 30325. Up to 3344 conditions per place. [2024-06-28 04:19:00,330 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 278 selfloop transitions, 45 changer transitions 0/327 dead transitions. [2024-06-28 04:19:00,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 327 transitions, 5063 flow [2024-06-28 04:19:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:19:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:19:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 04:19:00,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:19:00,332 INFO L175 Difference]: Start difference. First operand has 221 places, 308 transitions, 4235 flow. Second operand 7 states and 112 transitions. [2024-06-28 04:19:00,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 327 transitions, 5063 flow [2024-06-28 04:19:00,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 327 transitions, 4874 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-28 04:19:00,657 INFO L231 Difference]: Finished difference. Result has 223 places, 309 transitions, 4172 flow [2024-06-28 04:19:00,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4172, PETRI_PLACES=223, PETRI_TRANSITIONS=309} [2024-06-28 04:19:00,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-28 04:19:00,658 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 309 transitions, 4172 flow [2024-06-28 04:19:00,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:00,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:00,658 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 04:19:00,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:19:00,658 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 04:19:00,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:00,659 INFO L85 PathProgramCache]: Analyzing trace with hash -652152253, now seen corresponding path program 5 times [2024-06-28 04:19:00,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:00,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519998420] [2024-06-28 04:19:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:00,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:04,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:04,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519998420] [2024-06-28 04:19:04,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519998420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:04,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:04,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:04,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066071346] [2024-06-28 04:19:04,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:04,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:04,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:04,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:04,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 309 transitions, 4172 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:19:04,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:04,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:04,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:05,320 INFO L124 PetriNetUnfolderBase]: 2357/3690 cut-off events. [2024-06-28 04:19:05,320 INFO L125 PetriNetUnfolderBase]: For 186233/186244 co-relation queries the response was YES. [2024-06-28 04:19:05,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31399 conditions, 3690 events. 2357/3690 cut-off events. For 186233/186244 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19892 event pairs, 482 based on Foata normal form. 5/3690 useless extension candidates. Maximal degree in co-relation 31289. Up to 3359 conditions per place. [2024-06-28 04:19:05,362 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 73 changer transitions 0/349 dead transitions. [2024-06-28 04:19:05,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 349 transitions, 5387 flow [2024-06-28 04:19:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:19:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:19:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 04:19:05,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:19:05,372 INFO L175 Difference]: Start difference. First operand has 223 places, 309 transitions, 4172 flow. Second operand 9 states and 144 transitions. [2024-06-28 04:19:05,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 349 transitions, 5387 flow [2024-06-28 04:19:05,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 349 transitions, 5301 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 04:19:05,688 INFO L231 Difference]: Finished difference. Result has 229 places, 321 transitions, 4571 flow [2024-06-28 04:19:05,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4571, PETRI_PLACES=229, PETRI_TRANSITIONS=321} [2024-06-28 04:19:05,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-28 04:19:05,689 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 321 transitions, 4571 flow [2024-06-28 04:19:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:19:05,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:05,690 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 04:19:05,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:19:05,690 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 04:19:05,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash -327025183, now seen corresponding path program 6 times [2024-06-28 04:19:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:05,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269994896] [2024-06-28 04:19:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:08,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:08,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269994896] [2024-06-28 04:19:08,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269994896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:08,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:08,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:08,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880423561] [2024-06-28 04:19:08,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:08,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:08,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:08,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:08,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:08,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:08,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 321 transitions, 4571 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:19:08,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:08,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:08,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:09,713 INFO L124 PetriNetUnfolderBase]: 2375/3727 cut-off events. [2024-06-28 04:19:09,714 INFO L125 PetriNetUnfolderBase]: For 196517/196532 co-relation queries the response was YES. [2024-06-28 04:19:09,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32418 conditions, 3727 events. 2375/3727 cut-off events. For 196517/196532 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20215 event pairs, 477 based on Foata normal form. 14/3737 useless extension candidates. Maximal degree in co-relation 32305. Up to 3480 conditions per place. [2024-06-28 04:19:09,752 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 52 changer transitions 0/348 dead transitions. [2024-06-28 04:19:09,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 348 transitions, 5615 flow [2024-06-28 04:19:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:09,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 04:19:09,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-28 04:19:09,753 INFO L175 Difference]: Start difference. First operand has 229 places, 321 transitions, 4571 flow. Second operand 8 states and 125 transitions. [2024-06-28 04:19:09,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 348 transitions, 5615 flow [2024-06-28 04:19:10,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 348 transitions, 5446 flow, removed 72 selfloop flow, removed 2 redundant places. [2024-06-28 04:19:10,101 INFO L231 Difference]: Finished difference. Result has 235 places, 327 transitions, 4702 flow [2024-06-28 04:19:10,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4402, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4702, PETRI_PLACES=235, PETRI_TRANSITIONS=327} [2024-06-28 04:19:10,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-28 04:19:10,102 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 327 transitions, 4702 flow [2024-06-28 04:19:10,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:19:10,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:10,103 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 04:19:10,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:19:10,103 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 04:19:10,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:10,103 INFO L85 PathProgramCache]: Analyzing trace with hash -327411133, now seen corresponding path program 7 times [2024-06-28 04:19:10,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:10,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914565680] [2024-06-28 04:19:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:10,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:12,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:12,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914565680] [2024-06-28 04:19:12,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914565680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:12,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:12,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:12,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558770435] [2024-06-28 04:19:12,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:12,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:12,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:12,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:12,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:12,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:12,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 327 transitions, 4702 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:19:12,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:12,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:12,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:14,025 INFO L124 PetriNetUnfolderBase]: 2384/3740 cut-off events. [2024-06-28 04:19:14,025 INFO L125 PetriNetUnfolderBase]: For 203032/203047 co-relation queries the response was YES. [2024-06-28 04:19:14,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32629 conditions, 3740 events. 2384/3740 cut-off events. For 203032/203047 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20265 event pairs, 478 based on Foata normal form. 16/3752 useless extension candidates. Maximal degree in co-relation 32514. Up to 3506 conditions per place. [2024-06-28 04:19:14,063 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 301 selfloop transitions, 47 changer transitions 0/352 dead transitions. [2024-06-28 04:19:14,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 352 transitions, 5571 flow [2024-06-28 04:19:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:14,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:19:14,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 04:19:14,065 INFO L175 Difference]: Start difference. First operand has 235 places, 327 transitions, 4702 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:19:14,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 352 transitions, 5571 flow [2024-06-28 04:19:14,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 352 transitions, 5378 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-28 04:19:14,413 INFO L231 Difference]: Finished difference. Result has 238 places, 333 transitions, 4723 flow [2024-06-28 04:19:14,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4723, PETRI_PLACES=238, PETRI_TRANSITIONS=333} [2024-06-28 04:19:14,414 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-28 04:19:14,414 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 333 transitions, 4723 flow [2024-06-28 04:19:14,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:19:14,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:14,414 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 04:19:14,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:19:14,415 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 04:19:14,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:14,415 INFO L85 PathProgramCache]: Analyzing trace with hash 137989083, now seen corresponding path program 8 times [2024-06-28 04:19:14,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:14,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992082394] [2024-06-28 04:19:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:14,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:16,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:16,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992082394] [2024-06-28 04:19:16,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992082394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:16,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:16,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:16,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747725859] [2024-06-28 04:19:16,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:16,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:16,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:16,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:16,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:16,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 333 transitions, 4723 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:19:16,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:16,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:16,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:17,964 INFO L124 PetriNetUnfolderBase]: 2369/3706 cut-off events. [2024-06-28 04:19:17,965 INFO L125 PetriNetUnfolderBase]: For 199080/199091 co-relation queries the response was YES. [2024-06-28 04:19:17,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32364 conditions, 3706 events. 2369/3706 cut-off events. For 199080/199091 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19940 event pairs, 476 based on Foata normal form. 6/3707 useless extension candidates. Maximal degree in co-relation 32248. Up to 3494 conditions per place. [2024-06-28 04:19:18,007 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 294 selfloop transitions, 52 changer transitions 0/350 dead transitions. [2024-06-28 04:19:18,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 350 transitions, 5518 flow [2024-06-28 04:19:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-28 04:19:18,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-28 04:19:18,009 INFO L175 Difference]: Start difference. First operand has 238 places, 333 transitions, 4723 flow. Second operand 8 states and 120 transitions. [2024-06-28 04:19:18,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 350 transitions, 5518 flow [2024-06-28 04:19:18,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 350 transitions, 5300 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-28 04:19:18,370 INFO L231 Difference]: Finished difference. Result has 242 places, 333 transitions, 4619 flow [2024-06-28 04:19:18,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4505, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4619, PETRI_PLACES=242, PETRI_TRANSITIONS=333} [2024-06-28 04:19:18,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-28 04:19:18,372 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 333 transitions, 4619 flow [2024-06-28 04:19:18,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:19:18,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:18,377 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 04:19:18,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:19:18,377 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 04:19:18,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:18,378 INFO L85 PathProgramCache]: Analyzing trace with hash 138375033, now seen corresponding path program 9 times [2024-06-28 04:19:18,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:18,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521995353] [2024-06-28 04:19:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:18,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:20,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:20,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521995353] [2024-06-28 04:19:20,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521995353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:20,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:20,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:20,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921825464] [2024-06-28 04:19:20,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:20,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:20,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:20,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:20,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 333 transitions, 4619 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:19:20,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:20,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:20,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:21,704 INFO L124 PetriNetUnfolderBase]: 2381/3729 cut-off events. [2024-06-28 04:19:21,704 INFO L125 PetriNetUnfolderBase]: For 202362/202373 co-relation queries the response was YES. [2024-06-28 04:19:21,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32508 conditions, 3729 events. 2381/3729 cut-off events. For 202362/202373 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20131 event pairs, 468 based on Foata normal form. 5/3729 useless extension candidates. Maximal degree in co-relation 32391. Up to 3313 conditions per place. [2024-06-28 04:19:21,742 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 113 changer transitions 0/369 dead transitions. [2024-06-28 04:19:21,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 369 transitions, 6012 flow [2024-06-28 04:19:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:19:21,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-28 04:19:21,744 INFO L175 Difference]: Start difference. First operand has 242 places, 333 transitions, 4619 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:19:21,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 369 transitions, 6012 flow [2024-06-28 04:19:22,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 369 transitions, 5874 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 04:19:22,089 INFO L231 Difference]: Finished difference. Result has 244 places, 343 transitions, 5107 flow [2024-06-28 04:19:22,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4485, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5107, PETRI_PLACES=244, PETRI_TRANSITIONS=343} [2024-06-28 04:19:22,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-28 04:19:22,089 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 343 transitions, 5107 flow [2024-06-28 04:19:22,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 04:19:22,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:22,090 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 04:19:22,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:19:22,090 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 04:19:22,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash -14524545, now seen corresponding path program 2 times [2024-06-28 04:19:22,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:22,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153598521] [2024-06-28 04:19:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:22,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:24,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:24,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153598521] [2024-06-28 04:19:24,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153598521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:24,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:24,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:24,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510296667] [2024-06-28 04:19:24,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:24,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:24,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:24,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:24,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 343 transitions, 5107 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:24,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:24,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:24,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:26,182 INFO L124 PetriNetUnfolderBase]: 2425/3799 cut-off events. [2024-06-28 04:19:26,182 INFO L125 PetriNetUnfolderBase]: For 225088/225099 co-relation queries the response was YES. [2024-06-28 04:19:26,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33924 conditions, 3799 events. 2425/3799 cut-off events. For 225088/225099 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20541 event pairs, 478 based on Foata normal form. 13/3807 useless extension candidates. Maximal degree in co-relation 33805. Up to 3518 conditions per place. [2024-06-28 04:19:26,227 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 312 selfloop transitions, 48 changer transitions 0/364 dead transitions. [2024-06-28 04:19:26,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 364 transitions, 6067 flow [2024-06-28 04:19:26,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:19:26,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 04:19:26,229 INFO L175 Difference]: Start difference. First operand has 244 places, 343 transitions, 5107 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:19:26,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 364 transitions, 6067 flow [2024-06-28 04:19:26,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 364 transitions, 5904 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-28 04:19:26,623 INFO L231 Difference]: Finished difference. Result has 248 places, 344 transitions, 5074 flow [2024-06-28 04:19:26,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4944, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5074, PETRI_PLACES=248, PETRI_TRANSITIONS=344} [2024-06-28 04:19:26,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-28 04:19:26,624 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 344 transitions, 5074 flow [2024-06-28 04:19:26,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:26,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:26,628 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 04:19:26,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:19:26,628 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 04:19:26,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1192065, now seen corresponding path program 3 times [2024-06-28 04:19:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:26,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334161595] [2024-06-28 04:19:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:26,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:29,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:29,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334161595] [2024-06-28 04:19:29,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334161595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:29,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:29,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:29,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785536145] [2024-06-28 04:19:29,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:29,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:29,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:29,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:29,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:29,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 344 transitions, 5074 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:29,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:29,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:29,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:31,145 INFO L124 PetriNetUnfolderBase]: 2427/3805 cut-off events. [2024-06-28 04:19:31,145 INFO L125 PetriNetUnfolderBase]: For 219790/219801 co-relation queries the response was YES. [2024-06-28 04:19:31,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33848 conditions, 3805 events. 2427/3805 cut-off events. For 219790/219801 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20543 event pairs, 458 based on Foata normal form. 9/3809 useless extension candidates. Maximal degree in co-relation 33727. Up to 3432 conditions per place. [2024-06-28 04:19:31,190 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 314 selfloop transitions, 50 changer transitions 0/368 dead transitions. [2024-06-28 04:19:31,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 368 transitions, 6090 flow [2024-06-28 04:19:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 04:19:31,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-28 04:19:31,192 INFO L175 Difference]: Start difference. First operand has 248 places, 344 transitions, 5074 flow. Second operand 8 states and 125 transitions. [2024-06-28 04:19:31,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 368 transitions, 6090 flow [2024-06-28 04:19:31,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 368 transitions, 5990 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 04:19:31,631 INFO L231 Difference]: Finished difference. Result has 250 places, 345 transitions, 5108 flow [2024-06-28 04:19:31,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4974, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5108, PETRI_PLACES=250, PETRI_TRANSITIONS=345} [2024-06-28 04:19:31,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-28 04:19:31,632 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 345 transitions, 5108 flow [2024-06-28 04:19:31,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:31,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:31,632 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 04:19:31,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 04:19:31,633 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 04:19:31,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:31,633 INFO L85 PathProgramCache]: Analyzing trace with hash 943346785, now seen corresponding path program 1 times [2024-06-28 04:19:31,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:31,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405843703] [2024-06-28 04:19:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:31,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:34,475 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 04:19:34,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:34,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405843703] [2024-06-28 04:19:34,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405843703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:34,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:34,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:34,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273097498] [2024-06-28 04:19:34,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:34,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:34,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:34,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:34,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:34,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:34,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 345 transitions, 5108 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:34,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:34,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:34,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:36,012 INFO L124 PetriNetUnfolderBase]: 2514/3935 cut-off events. [2024-06-28 04:19:36,012 INFO L125 PetriNetUnfolderBase]: For 242221/242223 co-relation queries the response was YES. [2024-06-28 04:19:36,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35348 conditions, 3935 events. 2514/3935 cut-off events. For 242221/242223 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21481 event pairs, 514 based on Foata normal form. 8/3941 useless extension candidates. Maximal degree in co-relation 35226. Up to 3591 conditions per place. [2024-06-28 04:19:36,057 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 335 selfloop transitions, 53 changer transitions 0/392 dead transitions. [2024-06-28 04:19:36,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 392 transitions, 6394 flow [2024-06-28 04:19:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:19:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:19:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 04:19:36,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-28 04:19:36,059 INFO L175 Difference]: Start difference. First operand has 250 places, 345 transitions, 5108 flow. Second operand 9 states and 152 transitions. [2024-06-28 04:19:36,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 392 transitions, 6394 flow [2024-06-28 04:19:36,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 392 transitions, 6284 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 04:19:36,474 INFO L231 Difference]: Finished difference. Result has 255 places, 350 transitions, 5194 flow [2024-06-28 04:19:36,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4998, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5194, PETRI_PLACES=255, PETRI_TRANSITIONS=350} [2024-06-28 04:19:36,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-28 04:19:36,475 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 350 transitions, 5194 flow [2024-06-28 04:19:36,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:36,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:36,475 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 04:19:36,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 04:19:36,476 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 04:19:36,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash 945220735, now seen corresponding path program 2 times [2024-06-28 04:19:36,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:36,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804164798] [2024-06-28 04:19:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:36,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:39,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:39,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804164798] [2024-06-28 04:19:39,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804164798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:39,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:39,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:39,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326798458] [2024-06-28 04:19:39,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:39,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:39,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:39,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:39,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:39,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 350 transitions, 5194 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:39,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:39,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:39,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:40,565 INFO L124 PetriNetUnfolderBase]: 2601/4076 cut-off events. [2024-06-28 04:19:40,566 INFO L125 PetriNetUnfolderBase]: For 261177/261179 co-relation queries the response was YES. [2024-06-28 04:19:40,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37018 conditions, 4076 events. 2601/4076 cut-off events. For 261177/261179 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22378 event pairs, 535 based on Foata normal form. 8/4082 useless extension candidates. Maximal degree in co-relation 36893. Up to 3792 conditions per place. [2024-06-28 04:19:40,607 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 333 selfloop transitions, 52 changer transitions 0/389 dead transitions. [2024-06-28 04:19:40,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 389 transitions, 6444 flow [2024-06-28 04:19:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:19:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:19:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 04:19:40,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-28 04:19:40,614 INFO L175 Difference]: Start difference. First operand has 255 places, 350 transitions, 5194 flow. Second operand 9 states and 149 transitions. [2024-06-28 04:19:40,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 389 transitions, 6444 flow [2024-06-28 04:19:41,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 389 transitions, 6358 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 04:19:41,129 INFO L231 Difference]: Finished difference. Result has 260 places, 353 transitions, 5270 flow [2024-06-28 04:19:41,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5112, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5270, PETRI_PLACES=260, PETRI_TRANSITIONS=353} [2024-06-28 04:19:41,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-28 04:19:41,130 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 353 transitions, 5270 flow [2024-06-28 04:19:41,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:41,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:41,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:41,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 04:19:41,130 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 04:19:41,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:41,131 INFO L85 PathProgramCache]: Analyzing trace with hash 945224455, now seen corresponding path program 3 times [2024-06-28 04:19:41,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:41,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553171718] [2024-06-28 04:19:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:41,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:43,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:43,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553171718] [2024-06-28 04:19:43,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553171718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:43,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:43,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:43,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039707434] [2024-06-28 04:19:43,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:43,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:43,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:43,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:43,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:44,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:44,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 353 transitions, 5270 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:44,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:44,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:44,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:45,768 INFO L124 PetriNetUnfolderBase]: 2578/4047 cut-off events. [2024-06-28 04:19:45,769 INFO L125 PetriNetUnfolderBase]: For 257631/257633 co-relation queries the response was YES. [2024-06-28 04:19:45,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36442 conditions, 4047 events. 2578/4047 cut-off events. For 257631/257633 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22244 event pairs, 529 based on Foata normal form. 10/4055 useless extension candidates. Maximal degree in co-relation 36316. Up to 3876 conditions per place. [2024-06-28 04:19:45,818 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 359 selfloop transitions, 18 changer transitions 0/381 dead transitions. [2024-06-28 04:19:45,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 381 transitions, 6186 flow [2024-06-28 04:19:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:19:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:19:45,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-28 04:19:45,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-28 04:19:45,820 INFO L175 Difference]: Start difference. First operand has 260 places, 353 transitions, 5270 flow. Second operand 9 states and 134 transitions. [2024-06-28 04:19:45,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 381 transitions, 6186 flow [2024-06-28 04:19:46,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 381 transitions, 6118 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 04:19:46,331 INFO L231 Difference]: Finished difference. Result has 265 places, 354 transitions, 5265 flow [2024-06-28 04:19:46,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5204, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5265, PETRI_PLACES=265, PETRI_TRANSITIONS=354} [2024-06-28 04:19:46,332 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-28 04:19:46,332 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 354 transitions, 5265 flow [2024-06-28 04:19:46,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:46,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:46,332 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 04:19:46,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 04:19:46,332 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 04:19:46,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash 833606347, now seen corresponding path program 4 times [2024-06-28 04:19:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:46,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425970002] [2024-06-28 04:19:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:46,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:50,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:50,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425970002] [2024-06-28 04:19:50,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425970002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:50,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:50,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:50,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817446030] [2024-06-28 04:19:50,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:50,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:50,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:50,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:50,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:50,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:50,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 354 transitions, 5265 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:50,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:50,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:50,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:51,890 INFO L124 PetriNetUnfolderBase]: 2639/4140 cut-off events. [2024-06-28 04:19:51,891 INFO L125 PetriNetUnfolderBase]: For 269634/269636 co-relation queries the response was YES. [2024-06-28 04:19:51,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37548 conditions, 4140 events. 2639/4140 cut-off events. For 269634/269636 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22868 event pairs, 542 based on Foata normal form. 8/4146 useless extension candidates. Maximal degree in co-relation 37420. Up to 3908 conditions per place. [2024-06-28 04:19:51,944 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 361 selfloop transitions, 21 changer transitions 0/386 dead transitions. [2024-06-28 04:19:51,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 386 transitions, 6383 flow [2024-06-28 04:19:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:19:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:19:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-28 04:19:51,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-28 04:19:51,945 INFO L175 Difference]: Start difference. First operand has 265 places, 354 transitions, 5265 flow. Second operand 9 states and 137 transitions. [2024-06-28 04:19:51,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 386 transitions, 6383 flow [2024-06-28 04:19:52,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 386 transitions, 6306 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 04:19:52,537 INFO L231 Difference]: Finished difference. Result has 266 places, 357 transitions, 5295 flow [2024-06-28 04:19:52,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5188, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5295, PETRI_PLACES=266, PETRI_TRANSITIONS=357} [2024-06-28 04:19:52,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-28 04:19:52,537 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 357 transitions, 5295 flow [2024-06-28 04:19:52,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:52,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:52,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:52,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 04:19:52,538 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 04:19:52,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:52,538 INFO L85 PathProgramCache]: Analyzing trace with hash -327161397, now seen corresponding path program 5 times [2024-06-28 04:19:52,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:52,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96791307] [2024-06-28 04:19:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:52,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:56,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:56,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96791307] [2024-06-28 04:19:56,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96791307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:56,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:56,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:56,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261433966] [2024-06-28 04:19:56,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:56,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:56,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:56,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:19:56,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 357 transitions, 5295 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:56,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:56,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:19:56,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:57,546 INFO L124 PetriNetUnfolderBase]: 2685/4210 cut-off events. [2024-06-28 04:19:57,546 INFO L125 PetriNetUnfolderBase]: For 283334/283336 co-relation queries the response was YES. [2024-06-28 04:19:57,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38316 conditions, 4210 events. 2685/4210 cut-off events. For 283334/283336 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23325 event pairs, 556 based on Foata normal form. 10/4218 useless extension candidates. Maximal degree in co-relation 38186. Up to 4035 conditions per place. [2024-06-28 04:19:57,591 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 359 selfloop transitions, 23 changer transitions 0/386 dead transitions. [2024-06-28 04:19:57,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 386 transitions, 6258 flow [2024-06-28 04:19:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:19:57,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:19:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-28 04:19:57,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-28 04:19:57,592 INFO L175 Difference]: Start difference. First operand has 266 places, 357 transitions, 5295 flow. Second operand 9 states and 134 transitions. [2024-06-28 04:19:57,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 386 transitions, 6258 flow [2024-06-28 04:19:58,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 386 transitions, 6216 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:19:58,142 INFO L231 Difference]: Finished difference. Result has 270 places, 361 transitions, 5355 flow [2024-06-28 04:19:58,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5260, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5355, PETRI_PLACES=270, PETRI_TRANSITIONS=361} [2024-06-28 04:19:58,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-28 04:19:58,142 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 361 transitions, 5355 flow [2024-06-28 04:19:58,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:58,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:58,143 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 04:19:58,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 04:19:58,143 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 04:19:58,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:58,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1032060415, now seen corresponding path program 6 times [2024-06-28 04:19:58,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:58,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691193817] [2024-06-28 04:19:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:58,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:01,944 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 04:20:01,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:01,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691193817] [2024-06-28 04:20:01,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691193817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:01,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:01,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:01,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964195237] [2024-06-28 04:20:01,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:01,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:01,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:01,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:01,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:01,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:01,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 361 transitions, 5355 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:01,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:01,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:01,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:03,354 INFO L124 PetriNetUnfolderBase]: 2662/4177 cut-off events. [2024-06-28 04:20:03,355 INFO L125 PetriNetUnfolderBase]: For 274641/274643 co-relation queries the response was YES. [2024-06-28 04:20:03,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37646 conditions, 4177 events. 2662/4177 cut-off events. For 274641/274643 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23120 event pairs, 551 based on Foata normal form. 10/4185 useless extension candidates. Maximal degree in co-relation 37514. Up to 4011 conditions per place. [2024-06-28 04:20:03,408 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 364 selfloop transitions, 18 changer transitions 0/386 dead transitions. [2024-06-28 04:20:03,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 386 transitions, 6278 flow [2024-06-28 04:20:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:20:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:20:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-28 04:20:03,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35501355013550134 [2024-06-28 04:20:03,409 INFO L175 Difference]: Start difference. First operand has 270 places, 361 transitions, 5355 flow. Second operand 9 states and 131 transitions. [2024-06-28 04:20:03,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 386 transitions, 6278 flow [2024-06-28 04:20:03,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 386 transitions, 6241 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 04:20:03,974 INFO L231 Difference]: Finished difference. Result has 275 places, 362 transitions, 5380 flow [2024-06-28 04:20:03,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5320, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5380, PETRI_PLACES=275, PETRI_TRANSITIONS=362} [2024-06-28 04:20:03,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-28 04:20:03,976 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 362 transitions, 5380 flow [2024-06-28 04:20:03,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:03,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:03,976 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 04:20:03,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 04:20:03,976 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 04:20:03,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:03,977 INFO L85 PathProgramCache]: Analyzing trace with hash -327011295, now seen corresponding path program 1 times [2024-06-28 04:20:03,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:03,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320295138] [2024-06-28 04:20:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:03,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:08,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:08,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320295138] [2024-06-28 04:20:08,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320295138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:08,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:08,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:08,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052653876] [2024-06-28 04:20:08,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:08,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:08,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:08,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:08,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:08,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:08,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 362 transitions, 5380 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:08,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:08,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:08,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:09,716 INFO L124 PetriNetUnfolderBase]: 2690/4221 cut-off events. [2024-06-28 04:20:09,716 INFO L125 PetriNetUnfolderBase]: For 279925/279927 co-relation queries the response was YES. [2024-06-28 04:20:09,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38101 conditions, 4221 events. 2690/4221 cut-off events. For 279925/279927 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23419 event pairs, 557 based on Foata normal form. 8/4227 useless extension candidates. Maximal degree in co-relation 37968. Up to 4025 conditions per place. [2024-06-28 04:20:09,767 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 19 changer transitions 0/388 dead transitions. [2024-06-28 04:20:09,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 388 transitions, 6346 flow [2024-06-28 04:20:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:20:09,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:20:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-28 04:20:09,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-28 04:20:09,777 INFO L175 Difference]: Start difference. First operand has 275 places, 362 transitions, 5380 flow. Second operand 9 states and 132 transitions. [2024-06-28 04:20:09,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 388 transitions, 6346 flow [2024-06-28 04:20:10,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 388 transitions, 6299 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 04:20:10,393 INFO L231 Difference]: Finished difference. Result has 276 places, 363 transitions, 5400 flow [2024-06-28 04:20:10,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5333, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5400, PETRI_PLACES=276, PETRI_TRANSITIONS=363} [2024-06-28 04:20:10,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-28 04:20:10,396 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 363 transitions, 5400 flow [2024-06-28 04:20:10,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:10,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:10,396 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 04:20:10,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 04:20:10,396 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 04:20:10,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:10,397 INFO L85 PathProgramCache]: Analyzing trace with hash 337684759, now seen corresponding path program 7 times [2024-06-28 04:20:10,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:10,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911681167] [2024-06-28 04:20:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:10,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:13,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:13,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911681167] [2024-06-28 04:20:13,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911681167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:13,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:13,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:13,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639131800] [2024-06-28 04:20:13,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:13,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:13,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:13,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:13,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 363 transitions, 5400 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:13,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:13,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:13,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:14,695 INFO L124 PetriNetUnfolderBase]: 2723/4273 cut-off events. [2024-06-28 04:20:14,695 INFO L125 PetriNetUnfolderBase]: For 292731/292733 co-relation queries the response was YES. [2024-06-28 04:20:14,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38612 conditions, 4273 events. 2723/4273 cut-off events. For 292731/292733 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23807 event pairs, 569 based on Foata normal form. 11/4282 useless extension candidates. Maximal degree in co-relation 38478. Up to 4102 conditions per place. [2024-06-28 04:20:14,742 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 27 changer transitions 0/385 dead transitions. [2024-06-28 04:20:14,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 385 transitions, 6321 flow [2024-06-28 04:20:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:20:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:20:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-28 04:20:14,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34959349593495936 [2024-06-28 04:20:14,744 INFO L175 Difference]: Start difference. First operand has 276 places, 363 transitions, 5400 flow. Second operand 9 states and 129 transitions. [2024-06-28 04:20:14,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 385 transitions, 6321 flow [2024-06-28 04:20:15,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 385 transitions, 6262 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 04:20:15,348 INFO L231 Difference]: Finished difference. Result has 279 places, 365 transitions, 5449 flow [2024-06-28 04:20:15,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5343, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5449, PETRI_PLACES=279, PETRI_TRANSITIONS=365} [2024-06-28 04:20:15,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-28 04:20:15,349 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 365 transitions, 5449 flow [2024-06-28 04:20:15,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:15,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:15,349 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 04:20:15,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 04:20:15,349 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 04:20:15,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash 337690711, now seen corresponding path program 2 times [2024-06-28 04:20:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:15,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728322527] [2024-06-28 04:20:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:15,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:18,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:18,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728322527] [2024-06-28 04:20:18,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728322527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:18,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:18,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:18,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880999571] [2024-06-28 04:20:18,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:18,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:18,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:18,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:18,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:18,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:18,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 365 transitions, 5449 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:18,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:18,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:18,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:19,654 INFO L124 PetriNetUnfolderBase]: 2718/4268 cut-off events. [2024-06-28 04:20:19,655 INFO L125 PetriNetUnfolderBase]: For 289169/289171 co-relation queries the response was YES. [2024-06-28 04:20:19,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38718 conditions, 4268 events. 2718/4268 cut-off events. For 289169/289171 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23765 event pairs, 570 based on Foata normal form. 2/4268 useless extension candidates. Maximal degree in co-relation 38582. Up to 4152 conditions per place. [2024-06-28 04:20:19,700 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 17 changer transitions 0/381 dead transitions. [2024-06-28 04:20:19,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 381 transitions, 6280 flow [2024-06-28 04:20:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-28 04:20:19,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-28 04:20:19,702 INFO L175 Difference]: Start difference. First operand has 279 places, 365 transitions, 5449 flow. Second operand 8 states and 112 transitions. [2024-06-28 04:20:19,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 381 transitions, 6280 flow [2024-06-28 04:20:20,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 381 transitions, 6226 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:20:20,250 INFO L231 Difference]: Finished difference. Result has 281 places, 367 transitions, 5474 flow [2024-06-28 04:20:20,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5474, PETRI_PLACES=281, PETRI_TRANSITIONS=367} [2024-06-28 04:20:20,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-28 04:20:20,251 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 367 transitions, 5474 flow [2024-06-28 04:20:20,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:20,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:20,251 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 04:20:20,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 04:20:20,251 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 04:20:20,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:20,252 INFO L85 PathProgramCache]: Analyzing trace with hash 138382969, now seen corresponding path program 8 times [2024-06-28 04:20:20,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:20,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497691648] [2024-06-28 04:20:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:20,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:22,786 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 04:20:22,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:22,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497691648] [2024-06-28 04:20:22,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497691648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:22,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:22,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:22,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950043205] [2024-06-28 04:20:22,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:22,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:22,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:22,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:22,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:22,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:22,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 367 transitions, 5474 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:22,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:22,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:22,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:24,308 INFO L124 PetriNetUnfolderBase]: 2754/4322 cut-off events. [2024-06-28 04:20:24,309 INFO L125 PetriNetUnfolderBase]: For 311810/311812 co-relation queries the response was YES. [2024-06-28 04:20:24,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39234 conditions, 4322 events. 2754/4322 cut-off events. For 311810/311812 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24136 event pairs, 574 based on Foata normal form. 10/4330 useless extension candidates. Maximal degree in co-relation 39097. Up to 4149 conditions per place. [2024-06-28 04:20:24,365 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 31 changer transitions 0/389 dead transitions. [2024-06-28 04:20:24,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 389 transitions, 6402 flow [2024-06-28 04:20:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:20:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:20:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-28 04:20:24,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35501355013550134 [2024-06-28 04:20:24,367 INFO L175 Difference]: Start difference. First operand has 281 places, 367 transitions, 5474 flow. Second operand 9 states and 131 transitions. [2024-06-28 04:20:24,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 389 transitions, 6402 flow [2024-06-28 04:20:25,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 389 transitions, 6341 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 04:20:25,012 INFO L231 Difference]: Finished difference. Result has 284 places, 368 transitions, 5503 flow [2024-06-28 04:20:25,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5413, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5503, PETRI_PLACES=284, PETRI_TRANSITIONS=368} [2024-06-28 04:20:25,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-28 04:20:25,012 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 368 transitions, 5503 flow [2024-06-28 04:20:25,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:25,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:25,013 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 04:20:25,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 04:20:25,013 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 04:20:25,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:25,013 INFO L85 PathProgramCache]: Analyzing trace with hash 345309271, now seen corresponding path program 3 times [2024-06-28 04:20:25,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:25,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672644561] [2024-06-28 04:20:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:27,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:27,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672644561] [2024-06-28 04:20:27,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672644561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:27,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:27,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:27,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189837765] [2024-06-28 04:20:27,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:27,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:27,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:27,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:27,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:27,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:27,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 368 transitions, 5503 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:27,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:27,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:27,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:29,523 INFO L124 PetriNetUnfolderBase]: 2749/4317 cut-off events. [2024-06-28 04:20:29,524 INFO L125 PetriNetUnfolderBase]: For 302645/302647 co-relation queries the response was YES. [2024-06-28 04:20:29,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39246 conditions, 4317 events. 2749/4317 cut-off events. For 302645/302647 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24115 event pairs, 562 based on Foata normal form. 2/4317 useless extension candidates. Maximal degree in co-relation 39108. Up to 4196 conditions per place. [2024-06-28 04:20:29,574 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 362 selfloop transitions, 17 changer transitions 0/383 dead transitions. [2024-06-28 04:20:29,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 383 transitions, 6321 flow [2024-06-28 04:20:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-28 04:20:29,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-28 04:20:29,576 INFO L175 Difference]: Start difference. First operand has 284 places, 368 transitions, 5503 flow. Second operand 8 states and 112 transitions. [2024-06-28 04:20:29,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 383 transitions, 6321 flow [2024-06-28 04:20:30,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 383 transitions, 6256 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:20:30,188 INFO L231 Difference]: Finished difference. Result has 285 places, 369 transitions, 5505 flow [2024-06-28 04:20:30,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5438, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5505, PETRI_PLACES=285, PETRI_TRANSITIONS=369} [2024-06-28 04:20:30,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-28 04:20:30,189 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 369 transitions, 5505 flow [2024-06-28 04:20:30,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:30,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:30,189 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 04:20:30,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 04:20:30,190 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 04:20:30,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:30,190 INFO L85 PathProgramCache]: Analyzing trace with hash 138388921, now seen corresponding path program 4 times [2024-06-28 04:20:30,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:30,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506658147] [2024-06-28 04:20:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:30,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:33,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:33,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506658147] [2024-06-28 04:20:33,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506658147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:33,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:33,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:33,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232238333] [2024-06-28 04:20:33,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:33,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:33,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:33,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:33,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:33,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:33,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 369 transitions, 5505 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:33,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:33,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:33,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:34,446 INFO L124 PetriNetUnfolderBase]: 2757/4329 cut-off events. [2024-06-28 04:20:34,447 INFO L125 PetriNetUnfolderBase]: For 310747/310749 co-relation queries the response was YES. [2024-06-28 04:20:34,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39458 conditions, 4329 events. 2757/4329 cut-off events. For 310747/310749 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24173 event pairs, 573 based on Foata normal form. 2/4329 useless extension candidates. Maximal degree in co-relation 39319. Up to 4198 conditions per place. [2024-06-28 04:20:34,503 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 353 selfloop transitions, 29 changer transitions 0/386 dead transitions. [2024-06-28 04:20:34,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 386 transitions, 6380 flow [2024-06-28 04:20:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-28 04:20:34,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2024-06-28 04:20:34,505 INFO L175 Difference]: Start difference. First operand has 285 places, 369 transitions, 5505 flow. Second operand 8 states and 116 transitions. [2024-06-28 04:20:34,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 386 transitions, 6380 flow [2024-06-28 04:20:35,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 386 transitions, 6321 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:20:35,231 INFO L231 Difference]: Finished difference. Result has 287 places, 371 transitions, 5573 flow [2024-06-28 04:20:35,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5446, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5573, PETRI_PLACES=287, PETRI_TRANSITIONS=371} [2024-06-28 04:20:35,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-28 04:20:35,232 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 371 transitions, 5573 flow [2024-06-28 04:20:35,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:35,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:35,232 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 04:20:35,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 04:20:35,233 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 04:20:35,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:35,233 INFO L85 PathProgramCache]: Analyzing trace with hash 345042361, now seen corresponding path program 5 times [2024-06-28 04:20:35,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:35,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963725340] [2024-06-28 04:20:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:35,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:37,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:37,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963725340] [2024-06-28 04:20:37,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963725340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:37,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:37,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:37,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010741996] [2024-06-28 04:20:37,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:37,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:37,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:37,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:37,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:37,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:37,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 371 transitions, 5573 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:37,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:37,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:37,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:39,421 INFO L124 PetriNetUnfolderBase]: 2752/4322 cut-off events. [2024-06-28 04:20:39,421 INFO L125 PetriNetUnfolderBase]: For 315784/315786 co-relation queries the response was YES. [2024-06-28 04:20:39,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39440 conditions, 4322 events. 2752/4322 cut-off events. For 315784/315786 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24170 event pairs, 570 based on Foata normal form. 2/4322 useless extension candidates. Maximal degree in co-relation 39300. Up to 4194 conditions per place. [2024-06-28 04:20:39,471 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 359 selfloop transitions, 24 changer transitions 0/387 dead transitions. [2024-06-28 04:20:39,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 387 transitions, 6444 flow [2024-06-28 04:20:39,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-28 04:20:39,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445121951219512 [2024-06-28 04:20:39,473 INFO L175 Difference]: Start difference. First operand has 287 places, 371 transitions, 5573 flow. Second operand 8 states and 113 transitions. [2024-06-28 04:20:39,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 387 transitions, 6444 flow [2024-06-28 04:20:40,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 387 transitions, 6333 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 04:20:40,111 INFO L231 Difference]: Finished difference. Result has 289 places, 373 transitions, 5586 flow [2024-06-28 04:20:40,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5462, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5586, PETRI_PLACES=289, PETRI_TRANSITIONS=373} [2024-06-28 04:20:40,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-28 04:20:40,112 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 373 transitions, 5586 flow [2024-06-28 04:20:40,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:40,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:40,112 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 04:20:40,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 04:20:40,113 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 04:20:40,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:40,113 INFO L85 PathProgramCache]: Analyzing trace with hash -208260285, now seen corresponding path program 9 times [2024-06-28 04:20:40,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:40,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638688744] [2024-06-28 04:20:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:40,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:42,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:42,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638688744] [2024-06-28 04:20:42,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638688744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:42,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:42,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:42,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35258580] [2024-06-28 04:20:42,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:42,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:42,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:42,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:42,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:42,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 373 transitions, 5586 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:42,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:42,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:44,387 INFO L124 PetriNetUnfolderBase]: 2841/4461 cut-off events. [2024-06-28 04:20:44,387 INFO L125 PetriNetUnfolderBase]: For 348696/348698 co-relation queries the response was YES. [2024-06-28 04:20:44,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40990 conditions, 4461 events. 2841/4461 cut-off events. For 348696/348698 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25034 event pairs, 575 based on Foata normal form. 8/4467 useless extension candidates. Maximal degree in co-relation 40849. Up to 4077 conditions per place. [2024-06-28 04:20:44,448 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 360 selfloop transitions, 40 changer transitions 0/404 dead transitions. [2024-06-28 04:20:44,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 404 transitions, 6802 flow [2024-06-28 04:20:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:20:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:20:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-28 04:20:44,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-28 04:20:44,449 INFO L175 Difference]: Start difference. First operand has 289 places, 373 transitions, 5586 flow. Second operand 9 states and 135 transitions. [2024-06-28 04:20:44,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 404 transitions, 6802 flow [2024-06-28 04:20:45,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 404 transitions, 6704 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 04:20:45,153 INFO L231 Difference]: Finished difference. Result has 293 places, 378 transitions, 5691 flow [2024-06-28 04:20:45,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5488, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5691, PETRI_PLACES=293, PETRI_TRANSITIONS=378} [2024-06-28 04:20:45,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-28 04:20:45,155 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 378 transitions, 5691 flow [2024-06-28 04:20:45,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:45,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:45,156 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 04:20:45,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 04:20:45,156 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 04:20:45,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:45,156 INFO L85 PathProgramCache]: Analyzing trace with hash -208256565, now seen corresponding path program 10 times [2024-06-28 04:20:45,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:45,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576070679] [2024-06-28 04:20:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:45,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:48,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:48,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576070679] [2024-06-28 04:20:48,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576070679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:48,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:48,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:48,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185667155] [2024-06-28 04:20:48,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:48,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:48,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:48,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:48,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 378 transitions, 5691 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:48,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:48,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:48,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:49,828 INFO L124 PetriNetUnfolderBase]: 2838/4456 cut-off events. [2024-06-28 04:20:49,828 INFO L125 PetriNetUnfolderBase]: For 353973/353975 co-relation queries the response was YES. [2024-06-28 04:20:49,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40671 conditions, 4456 events. 2838/4456 cut-off events. For 353973/353975 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24984 event pairs, 586 based on Foata normal form. 16/4470 useless extension candidates. Maximal degree in co-relation 40528. Up to 4193 conditions per place. [2024-06-28 04:20:49,881 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 353 selfloop transitions, 46 changer transitions 0/403 dead transitions. [2024-06-28 04:20:49,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 403 transitions, 6693 flow [2024-06-28 04:20:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:20:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:20:49,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2024-06-28 04:20:49,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2024-06-28 04:20:49,883 INFO L175 Difference]: Start difference. First operand has 293 places, 378 transitions, 5691 flow. Second operand 10 states and 145 transitions. [2024-06-28 04:20:49,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 403 transitions, 6693 flow [2024-06-28 04:20:50,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 403 transitions, 6655 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 04:20:50,551 INFO L231 Difference]: Finished difference. Result has 300 places, 380 transitions, 5815 flow [2024-06-28 04:20:50,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5815, PETRI_PLACES=300, PETRI_TRANSITIONS=380} [2024-06-28 04:20:50,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-28 04:20:50,551 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 380 transitions, 5815 flow [2024-06-28 04:20:50,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:50,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:50,552 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 04:20:50,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 04:20:50,552 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 04:20:50,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:50,552 INFO L85 PathProgramCache]: Analyzing trace with hash -823213180, now seen corresponding path program 1 times [2024-06-28 04:20:50,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:50,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100073769] [2024-06-28 04:20:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:50,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:53,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:53,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100073769] [2024-06-28 04:20:53,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100073769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:53,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:53,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:53,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821636213] [2024-06-28 04:20:53,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:53,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:53,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:53,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:53,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:53,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:53,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 380 transitions, 5815 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:53,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:53,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:53,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:55,494 INFO L124 PetriNetUnfolderBase]: 2866/4501 cut-off events. [2024-06-28 04:20:55,494 INFO L125 PetriNetUnfolderBase]: For 348536/348547 co-relation queries the response was YES. [2024-06-28 04:20:55,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41229 conditions, 4501 events. 2866/4501 cut-off events. For 348536/348547 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25217 event pairs, 456 based on Foata normal form. 9/4505 useless extension candidates. Maximal degree in co-relation 41084. Up to 4070 conditions per place. [2024-06-28 04:20:55,555 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 360 selfloop transitions, 46 changer transitions 0/410 dead transitions. [2024-06-28 04:20:55,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 410 transitions, 7043 flow [2024-06-28 04:20:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:20:55,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-28 04:20:55,557 INFO L175 Difference]: Start difference. First operand has 300 places, 380 transitions, 5815 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:20:55,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 410 transitions, 7043 flow [2024-06-28 04:20:56,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 410 transitions, 6945 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 04:20:56,355 INFO L231 Difference]: Finished difference. Result has 300 places, 381 transitions, 5843 flow [2024-06-28 04:20:56,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5717, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5843, PETRI_PLACES=300, PETRI_TRANSITIONS=381} [2024-06-28 04:20:56,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-28 04:20:56,355 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 381 transitions, 5843 flow [2024-06-28 04:20:56,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:56,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:56,356 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 04:20:56,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 04:20:56,356 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 04:20:56,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:56,356 INFO L85 PathProgramCache]: Analyzing trace with hash 982943252, now seen corresponding path program 2 times [2024-06-28 04:20:56,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:56,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870089935] [2024-06-28 04:20:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:56,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:59,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:59,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870089935] [2024-06-28 04:20:59,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870089935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:59,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:59,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:59,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491227322] [2024-06-28 04:20:59,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:59,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:59,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:59,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:59,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:20:59,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 381 transitions, 5843 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:59,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:59,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:20:59,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:01,168 INFO L124 PetriNetUnfolderBase]: 2848/4477 cut-off events. [2024-06-28 04:21:01,168 INFO L125 PetriNetUnfolderBase]: For 337183/337194 co-relation queries the response was YES. [2024-06-28 04:21:01,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40621 conditions, 4477 events. 2848/4477 cut-off events. For 337183/337194 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25139 event pairs, 545 based on Foata normal form. 9/4481 useless extension candidates. Maximal degree in co-relation 40475. Up to 4156 conditions per place. [2024-06-28 04:21:01,228 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 352 selfloop transitions, 48 changer transitions 0/404 dead transitions. [2024-06-28 04:21:01,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 404 transitions, 6879 flow [2024-06-28 04:21:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:21:01,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-28 04:21:01,230 INFO L175 Difference]: Start difference. First operand has 300 places, 381 transitions, 5843 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:21:01,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 404 transitions, 6879 flow [2024-06-28 04:21:02,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 404 transitions, 6787 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 04:21:02,009 INFO L231 Difference]: Finished difference. Result has 303 places, 381 transitions, 5851 flow [2024-06-28 04:21:02,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5751, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5851, PETRI_PLACES=303, PETRI_TRANSITIONS=381} [2024-06-28 04:21:02,010 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-28 04:21:02,010 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 381 transitions, 5851 flow [2024-06-28 04:21:02,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:02,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:02,010 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 04:21:02,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 04:21:02,011 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 04:21:02,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:02,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1244972335, now seen corresponding path program 1 times [2024-06-28 04:21:02,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:02,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554808341] [2024-06-28 04:21:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:02,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:04,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:04,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554808341] [2024-06-28 04:21:04,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554808341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:04,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:04,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:04,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044452799] [2024-06-28 04:21:04,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:04,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:04,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:04,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:04,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:21:04,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 381 transitions, 5851 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:04,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:04,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:21:04,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:06,604 INFO L124 PetriNetUnfolderBase]: 2853/4484 cut-off events. [2024-06-28 04:21:06,604 INFO L125 PetriNetUnfolderBase]: For 332288/332299 co-relation queries the response was YES. [2024-06-28 04:21:06,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40711 conditions, 4484 events. 2853/4484 cut-off events. For 332288/332299 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25230 event pairs, 576 based on Foata normal form. 2/4481 useless extension candidates. Maximal degree in co-relation 40564. Up to 4139 conditions per place. [2024-06-28 04:21:06,658 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 73 changer transitions 0/403 dead transitions. [2024-06-28 04:21:06,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 403 transitions, 6795 flow [2024-06-28 04:21:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:21:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:21:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:21:06,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:21:06,660 INFO L175 Difference]: Start difference. First operand has 303 places, 381 transitions, 5851 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:21:06,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 403 transitions, 6795 flow [2024-06-28 04:21:07,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 403 transitions, 6671 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 04:21:07,393 INFO L231 Difference]: Finished difference. Result has 303 places, 384 transitions, 5986 flow [2024-06-28 04:21:07,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5727, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5986, PETRI_PLACES=303, PETRI_TRANSITIONS=384} [2024-06-28 04:21:07,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-28 04:21:07,394 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 384 transitions, 5986 flow [2024-06-28 04:21:07,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:07,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:07,394 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 04:21:07,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 04:21:07,394 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 04:21:07,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:07,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1402212907, now seen corresponding path program 2 times [2024-06-28 04:21:07,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:07,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073564968] [2024-06-28 04:21:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:07,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:10,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:10,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073564968] [2024-06-28 04:21:10,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073564968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:10,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:10,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:10,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678658404] [2024-06-28 04:21:10,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:10,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:10,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:10,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:10,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:10,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:21:10,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 384 transitions, 5986 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 04:21:10,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:10,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:21:10,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:11,901 INFO L124 PetriNetUnfolderBase]: 2858/4491 cut-off events. [2024-06-28 04:21:11,902 INFO L125 PetriNetUnfolderBase]: For 342271/342282 co-relation queries the response was YES. [2024-06-28 04:21:11,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41240 conditions, 4491 events. 2858/4491 cut-off events. For 342271/342282 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25223 event pairs, 576 based on Foata normal form. 2/4488 useless extension candidates. Maximal degree in co-relation 41092. Up to 4149 conditions per place. [2024-06-28 04:21:11,964 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 317 selfloop transitions, 80 changer transitions 0/401 dead transitions. [2024-06-28 04:21:11,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 401 transitions, 6918 flow [2024-06-28 04:21:11,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:21:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:21:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-28 04:21:11,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:21:11,966 INFO L175 Difference]: Start difference. First operand has 303 places, 384 transitions, 5986 flow. Second operand 6 states and 102 transitions. [2024-06-28 04:21:11,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 401 transitions, 6918 flow [2024-06-28 04:21:12,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 401 transitions, 6709 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-28 04:21:12,917 INFO L231 Difference]: Finished difference. Result has 304 places, 387 transitions, 6075 flow [2024-06-28 04:21:12,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5777, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6075, PETRI_PLACES=304, PETRI_TRANSITIONS=387} [2024-06-28 04:21:12,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-28 04:21:12,918 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 387 transitions, 6075 flow [2024-06-28 04:21:12,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 04:21:12,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:12,918 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 04:21:12,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 04:21:12,918 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 04:21:12,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash 936713442, now seen corresponding path program 1 times [2024-06-28 04:21:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:12,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51428292] [2024-06-28 04:21:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:12,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:16,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:16,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51428292] [2024-06-28 04:21:16,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51428292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:16,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:16,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:16,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841850559] [2024-06-28 04:21:16,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:16,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:16,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:16,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:16,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:16,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:21:16,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 387 transitions, 6075 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:16,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:16,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:21:16,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:18,479 INFO L124 PetriNetUnfolderBase]: 2868/4507 cut-off events. [2024-06-28 04:21:18,479 INFO L125 PetriNetUnfolderBase]: For 358546/358557 co-relation queries the response was YES. [2024-06-28 04:21:18,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41963 conditions, 4507 events. 2868/4507 cut-off events. For 358546/358557 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 25362 event pairs, 560 based on Foata normal form. 3/4505 useless extension candidates. Maximal degree in co-relation 41814. Up to 4077 conditions per place. [2024-06-28 04:21:18,541 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 297 selfloop transitions, 112 changer transitions 0/413 dead transitions. [2024-06-28 04:21:18,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 413 transitions, 7176 flow [2024-06-28 04:21:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:21:18,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-28 04:21:18,542 INFO L175 Difference]: Start difference. First operand has 304 places, 387 transitions, 6075 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:21:18,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 413 transitions, 7176 flow [2024-06-28 04:21:19,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 413 transitions, 6976 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-28 04:21:19,391 INFO L231 Difference]: Finished difference. Result has 308 places, 390 transitions, 6246 flow [2024-06-28 04:21:19,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5875, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6246, PETRI_PLACES=308, PETRI_TRANSITIONS=390} [2024-06-28 04:21:19,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-28 04:21:19,392 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 390 transitions, 6246 flow [2024-06-28 04:21:19,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:19,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:19,392 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 04:21:19,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 04:21:19,393 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 04:21:19,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:19,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1367340211, now seen corresponding path program 3 times [2024-06-28 04:21:19,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:19,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086404962] [2024-06-28 04:21:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:19,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:23,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:23,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086404962] [2024-06-28 04:21:23,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086404962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:23,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:23,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:23,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761497116] [2024-06-28 04:21:23,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:23,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:23,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:23,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:21:23,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 390 transitions, 6246 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:23,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:23,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:21:23,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:25,231 INFO L124 PetriNetUnfolderBase]: 2889/4542 cut-off events. [2024-06-28 04:21:25,231 INFO L125 PetriNetUnfolderBase]: For 374986/375001 co-relation queries the response was YES. [2024-06-28 04:21:25,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43087 conditions, 4542 events. 2889/4542 cut-off events. For 374986/375001 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25641 event pairs, 573 based on Foata normal form. 13/4551 useless extension candidates. Maximal degree in co-relation 42937. Up to 4212 conditions per place. [2024-06-28 04:21:25,301 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 356 selfloop transitions, 76 changer transitions 0/436 dead transitions. [2024-06-28 04:21:25,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 436 transitions, 7892 flow [2024-06-28 04:21:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:21:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:21:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 04:21:25,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-28 04:21:25,303 INFO L175 Difference]: Start difference. First operand has 308 places, 390 transitions, 6246 flow. Second operand 9 states and 149 transitions. [2024-06-28 04:21:25,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 436 transitions, 7892 flow [2024-06-28 04:21:26,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 436 transitions, 7568 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:26,209 INFO L231 Difference]: Finished difference. Result has 311 places, 403 transitions, 6492 flow [2024-06-28 04:21:26,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5927, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6492, PETRI_PLACES=311, PETRI_TRANSITIONS=403} [2024-06-28 04:21:26,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-28 04:21:26,210 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 403 transitions, 6492 flow [2024-06-28 04:21:26,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:26,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:26,210 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 04:21:26,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 04:21:26,210 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 04:21:26,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2001383318, now seen corresponding path program 1 times [2024-06-28 04:21:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:26,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576136700] [2024-06-28 04:21:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:26,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:28,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:28,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576136700] [2024-06-28 04:21:28,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576136700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:28,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:28,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:28,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668176699] [2024-06-28 04:21:28,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:28,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:28,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:28,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:28,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:21:28,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 403 transitions, 6492 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:28,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:28,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:21:28,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:30,676 INFO L124 PetriNetUnfolderBase]: 2938/4619 cut-off events. [2024-06-28 04:21:30,677 INFO L125 PetriNetUnfolderBase]: For 394948/394963 co-relation queries the response was YES. [2024-06-28 04:21:30,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44192 conditions, 4619 events. 2938/4619 cut-off events. For 394948/394963 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 26174 event pairs, 569 based on Foata normal form. 14/4629 useless extension candidates. Maximal degree in co-relation 44041. Up to 4286 conditions per place. [2024-06-28 04:21:30,737 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 366 selfloop transitions, 97 changer transitions 0/467 dead transitions. [2024-06-28 04:21:30,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 467 transitions, 8392 flow [2024-06-28 04:21:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:21:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:21:30,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-28 04:21:30,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-28 04:21:30,739 INFO L175 Difference]: Start difference. First operand has 311 places, 403 transitions, 6492 flow. Second operand 9 states and 146 transitions. [2024-06-28 04:21:30,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 467 transitions, 8392 flow [2024-06-28 04:21:31,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 467 transitions, 8246 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-28 04:21:31,655 INFO L231 Difference]: Finished difference. Result has 320 places, 435 transitions, 7387 flow [2024-06-28 04:21:31,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6346, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7387, PETRI_PLACES=320, PETRI_TRANSITIONS=435} [2024-06-28 04:21:31,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-28 04:21:31,655 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 435 transitions, 7387 flow [2024-06-28 04:21:31,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:31,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:31,656 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 04:21:31,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 04:21:31,656 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 04:21:31,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash 277590017, now seen corresponding path program 4 times [2024-06-28 04:21:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:31,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995384350] [2024-06-28 04:21:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:34,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:34,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995384350] [2024-06-28 04:21:34,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995384350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:34,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:34,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:34,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713467425] [2024-06-28 04:21:34,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:34,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:34,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:34,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:34,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:34,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:21:34,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 435 transitions, 7387 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:34,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:34,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:21:34,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:36,623 INFO L124 PetriNetUnfolderBase]: 2943/4618 cut-off events. [2024-06-28 04:21:36,623 INFO L125 PetriNetUnfolderBase]: For 405726/405737 co-relation queries the response was YES. [2024-06-28 04:21:36,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45216 conditions, 4618 events. 2943/4618 cut-off events. For 405726/405737 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26035 event pairs, 577 based on Foata normal form. 2/4615 useless extension candidates. Maximal degree in co-relation 45059. Up to 4166 conditions per place. [2024-06-28 04:21:36,680 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 352 selfloop transitions, 106 changer transitions 0/462 dead transitions. [2024-06-28 04:21:36,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 462 transitions, 8715 flow [2024-06-28 04:21:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:21:36,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-28 04:21:36,682 INFO L175 Difference]: Start difference. First operand has 320 places, 435 transitions, 7387 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:21:36,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 462 transitions, 8715 flow [2024-06-28 04:21:37,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 462 transitions, 8536 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-28 04:21:37,953 INFO L231 Difference]: Finished difference. Result has 327 places, 441 transitions, 7689 flow [2024-06-28 04:21:37,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7208, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7689, PETRI_PLACES=327, PETRI_TRANSITIONS=441} [2024-06-28 04:21:37,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-28 04:21:37,954 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 441 transitions, 7689 flow [2024-06-28 04:21:37,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:37,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:37,954 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 04:21:37,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 04:21:37,955 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 04:21:37,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:37,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1370410482, now seen corresponding path program 2 times [2024-06-28 04:21:37,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:37,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069607333] [2024-06-28 04:21:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:37,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:41,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:41,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069607333] [2024-06-28 04:21:41,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069607333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:41,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:41,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:41,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077879423] [2024-06-28 04:21:41,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:41,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:41,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:41,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:41,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:21:41,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 441 transitions, 7689 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:41,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:41,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:21:41,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:42,702 INFO L124 PetriNetUnfolderBase]: 2963/4658 cut-off events. [2024-06-28 04:21:42,702 INFO L125 PetriNetUnfolderBase]: For 429793/429808 co-relation queries the response was YES. [2024-06-28 04:21:42,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46301 conditions, 4658 events. 2963/4658 cut-off events. For 429793/429808 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 26367 event pairs, 560 based on Foata normal form. 16/4670 useless extension candidates. Maximal degree in co-relation 46141. Up to 4425 conditions per place. [2024-06-28 04:21:42,772 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 420 selfloop transitions, 41 changer transitions 0/465 dead transitions. [2024-06-28 04:21:42,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 465 transitions, 8849 flow [2024-06-28 04:21:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:21:42,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-28 04:21:42,774 INFO L175 Difference]: Start difference. First operand has 327 places, 441 transitions, 7689 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:21:42,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 465 transitions, 8849 flow [2024-06-28 04:21:44,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 465 transitions, 8528 flow, removed 90 selfloop flow, removed 4 redundant places. [2024-06-28 04:21:44,234 INFO L231 Difference]: Finished difference. Result has 331 places, 445 transitions, 7629 flow [2024-06-28 04:21:44,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7368, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7629, PETRI_PLACES=331, PETRI_TRANSITIONS=445} [2024-06-28 04:21:44,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-28 04:21:44,234 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 445 transitions, 7629 flow [2024-06-28 04:21:44,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:44,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:44,235 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 04:21:44,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 04:21:44,235 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 04:21:44,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash -908563380, now seen corresponding path program 2 times [2024-06-28 04:21:44,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:44,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130945337] [2024-06-28 04:21:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:44,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:48,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:48,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130945337] [2024-06-28 04:21:48,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130945337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:48,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:48,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:48,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931828307] [2024-06-28 04:21:48,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:48,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:48,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:48,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:48,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:48,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:21:48,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 445 transitions, 7629 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:48,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:48,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:21:48,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:50,581 INFO L124 PetriNetUnfolderBase]: 3059/4803 cut-off events. [2024-06-28 04:21:50,581 INFO L125 PetriNetUnfolderBase]: For 450638/450648 co-relation queries the response was YES. [2024-06-28 04:21:50,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48444 conditions, 4803 events. 3059/4803 cut-off events. For 450638/450648 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 27299 event pairs, 568 based on Foata normal form. 10/4810 useless extension candidates. Maximal degree in co-relation 48283. Up to 4584 conditions per place. [2024-06-28 04:21:50,644 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 458 selfloop transitions, 39 changer transitions 0/501 dead transitions. [2024-06-28 04:21:50,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 501 transitions, 9607 flow [2024-06-28 04:21:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:21:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:21:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-28 04:21:50,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36097560975609755 [2024-06-28 04:21:50,646 INFO L175 Difference]: Start difference. First operand has 331 places, 445 transitions, 7629 flow. Second operand 10 states and 148 transitions. [2024-06-28 04:21:50,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 501 transitions, 9607 flow [2024-06-28 04:21:52,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 501 transitions, 9357 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:52,108 INFO L231 Difference]: Finished difference. Result has 340 places, 473 transitions, 8252 flow [2024-06-28 04:21:52,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7414, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8252, PETRI_PLACES=340, PETRI_TRANSITIONS=473} [2024-06-28 04:21:52,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-28 04:21:52,109 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 473 transitions, 8252 flow [2024-06-28 04:21:52,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:52,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:52,109 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 04:21:52,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 04:21:52,110 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 04:21:52,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:52,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1447158554, now seen corresponding path program 3 times [2024-06-28 04:21:52,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:52,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002419681] [2024-06-28 04:21:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:52,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:55,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:55,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002419681] [2024-06-28 04:21:55,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002419681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:55,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:55,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:55,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241487584] [2024-06-28 04:21:55,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:55,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:55,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:55,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:55,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:55,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:21:55,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 473 transitions, 8252 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:55,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:55,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:21:55,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:57,473 INFO L124 PetriNetUnfolderBase]: 3105/4859 cut-off events. [2024-06-28 04:21:57,474 INFO L125 PetriNetUnfolderBase]: For 479405/479414 co-relation queries the response was YES. [2024-06-28 04:21:57,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49731 conditions, 4859 events. 3105/4859 cut-off events. For 479405/479414 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 27495 event pairs, 568 based on Foata normal form. 5/4859 useless extension candidates. Maximal degree in co-relation 49564. Up to 4311 conditions per place. [2024-06-28 04:21:57,559 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 357 selfloop transitions, 149 changer transitions 0/510 dead transitions. [2024-06-28 04:21:57,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 510 transitions, 9905 flow [2024-06-28 04:21:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:21:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:21:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 04:21:57,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-28 04:21:57,562 INFO L175 Difference]: Start difference. First operand has 340 places, 473 transitions, 8252 flow. Second operand 9 states and 148 transitions. [2024-06-28 04:21:57,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 510 transitions, 9905 flow [2024-06-28 04:21:59,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 510 transitions, 9695 flow, removed 92 selfloop flow, removed 3 redundant places. [2024-06-28 04:21:59,055 INFO L231 Difference]: Finished difference. Result has 347 places, 484 transitions, 8756 flow [2024-06-28 04:21:59,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8042, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8756, PETRI_PLACES=347, PETRI_TRANSITIONS=484} [2024-06-28 04:21:59,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-28 04:21:59,055 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 484 transitions, 8756 flow [2024-06-28 04:21:59,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:59,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:59,056 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 04:21:59,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 04:21:59,057 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 04:21:59,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:59,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1370405491, now seen corresponding path program 5 times [2024-06-28 04:21:59,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:59,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280550617] [2024-06-28 04:21:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:59,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:03,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:03,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280550617] [2024-06-28 04:22:03,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280550617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:03,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:03,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:03,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921963207] [2024-06-28 04:22:03,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:03,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:03,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:03,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:03,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:03,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:22:03,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 484 transitions, 8756 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:03,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:03,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:22:03,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:04,958 INFO L124 PetriNetUnfolderBase]: 3102/4867 cut-off events. [2024-06-28 04:22:04,958 INFO L125 PetriNetUnfolderBase]: For 483430/483445 co-relation queries the response was YES. [2024-06-28 04:22:05,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50498 conditions, 4867 events. 3102/4867 cut-off events. For 483430/483445 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 27686 event pairs, 583 based on Foata normal form. 13/4876 useless extension candidates. Maximal degree in co-relation 50329. Up to 4556 conditions per place. [2024-06-28 04:22:05,040 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 428 selfloop transitions, 69 changer transitions 0/501 dead transitions. [2024-06-28 04:22:05,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 501 transitions, 9954 flow [2024-06-28 04:22:05,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:22:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:22:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 04:22:05,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:22:05,042 INFO L175 Difference]: Start difference. First operand has 347 places, 484 transitions, 8756 flow. Second operand 7 states and 112 transitions. [2024-06-28 04:22:05,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 501 transitions, 9954 flow [2024-06-28 04:22:06,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 501 transitions, 9522 flow, removed 132 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:06,537 INFO L231 Difference]: Finished difference. Result has 348 places, 484 transitions, 8479 flow [2024-06-28 04:22:06,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8324, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8479, PETRI_PLACES=348, PETRI_TRANSITIONS=484} [2024-06-28 04:22:06,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-28 04:22:06,538 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 484 transitions, 8479 flow [2024-06-28 04:22:06,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:06,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:06,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:06,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 04:22:06,539 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 04:22:06,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:06,541 INFO L85 PathProgramCache]: Analyzing trace with hash 280380947, now seen corresponding path program 6 times [2024-06-28 04:22:06,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:06,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309914758] [2024-06-28 04:22:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:10,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:10,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309914758] [2024-06-28 04:22:10,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309914758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:10,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:10,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:10,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773140987] [2024-06-28 04:22:10,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:10,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:10,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:10,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:10,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:10,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:22:10,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 484 transitions, 8479 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:10,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:10,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:22:10,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:12,347 INFO L124 PetriNetUnfolderBase]: 3099/4857 cut-off events. [2024-06-28 04:22:12,347 INFO L125 PetriNetUnfolderBase]: For 482894/482909 co-relation queries the response was YES. [2024-06-28 04:22:12,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50027 conditions, 4857 events. 3099/4857 cut-off events. For 482894/482909 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 27598 event pairs, 581 based on Foata normal form. 13/4866 useless extension candidates. Maximal degree in co-relation 49857. Up to 4553 conditions per place. [2024-06-28 04:22:12,424 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 428 selfloop transitions, 69 changer transitions 0/501 dead transitions. [2024-06-28 04:22:12,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 501 transitions, 9521 flow [2024-06-28 04:22:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:22:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:22:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-28 04:22:12,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-28 04:22:12,425 INFO L175 Difference]: Start difference. First operand has 348 places, 484 transitions, 8479 flow. Second operand 8 states and 122 transitions. [2024-06-28 04:22:12,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 501 transitions, 9521 flow [2024-06-28 04:22:13,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 501 transitions, 9340 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 04:22:13,891 INFO L231 Difference]: Finished difference. Result has 351 places, 484 transitions, 8443 flow [2024-06-28 04:22:13,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8298, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8443, PETRI_PLACES=351, PETRI_TRANSITIONS=484} [2024-06-28 04:22:13,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-28 04:22:13,892 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 484 transitions, 8443 flow [2024-06-28 04:22:13,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:13,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:13,893 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 04:22:13,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 04:22:13,893 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 04:22:13,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1370400066, now seen corresponding path program 3 times [2024-06-28 04:22:13,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:13,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875526686] [2024-06-28 04:22:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:13,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:17,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:17,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875526686] [2024-06-28 04:22:17,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875526686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:17,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:17,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:17,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666786486] [2024-06-28 04:22:17,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:17,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:17,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:17,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:22:17,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 484 transitions, 8443 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:17,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:17,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:22:17,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:19,856 INFO L124 PetriNetUnfolderBase]: 3124/4898 cut-off events. [2024-06-28 04:22:19,856 INFO L125 PetriNetUnfolderBase]: For 506222/506237 co-relation queries the response was YES. [2024-06-28 04:22:19,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50718 conditions, 4898 events. 3124/4898 cut-off events. For 506222/506237 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 27822 event pairs, 565 based on Foata normal form. 16/4910 useless extension candidates. Maximal degree in co-relation 50547. Up to 4598 conditions per place. [2024-06-28 04:22:19,933 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 446 selfloop transitions, 64 changer transitions 0/514 dead transitions. [2024-06-28 04:22:19,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 514 transitions, 10042 flow [2024-06-28 04:22:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:22:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:22:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:22:19,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-28 04:22:19,936 INFO L175 Difference]: Start difference. First operand has 351 places, 484 transitions, 8443 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:22:19,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 514 transitions, 10042 flow [2024-06-28 04:22:21,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 514 transitions, 9746 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-28 04:22:21,493 INFO L231 Difference]: Finished difference. Result has 353 places, 493 transitions, 8651 flow [2024-06-28 04:22:21,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8153, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8651, PETRI_PLACES=353, PETRI_TRANSITIONS=493} [2024-06-28 04:22:21,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-28 04:22:21,494 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 493 transitions, 8651 flow [2024-06-28 04:22:21,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:21,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:21,495 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 04:22:21,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 04:22:21,495 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 04:22:21,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:21,496 INFO L85 PathProgramCache]: Analyzing trace with hash -969891825, now seen corresponding path program 7 times [2024-06-28 04:22:21,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:21,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621307704] [2024-06-28 04:22:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:21,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:24,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:24,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621307704] [2024-06-28 04:22:24,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621307704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:24,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:24,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:24,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478263662] [2024-06-28 04:22:24,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:24,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:24,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:24,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:24,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:24,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:22:24,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 493 transitions, 8651 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:24,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:24,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:22:24,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:26,600 INFO L124 PetriNetUnfolderBase]: 3129/4901 cut-off events. [2024-06-28 04:22:26,600 INFO L125 PetriNetUnfolderBase]: For 510905/510914 co-relation queries the response was YES. [2024-06-28 04:22:26,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51122 conditions, 4901 events. 3129/4901 cut-off events. For 510905/510914 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27790 event pairs, 584 based on Foata normal form. 2/4898 useless extension candidates. Maximal degree in co-relation 50949. Up to 4649 conditions per place. [2024-06-28 04:22:26,684 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 52 changer transitions 0/508 dead transitions. [2024-06-28 04:22:26,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 508 transitions, 9801 flow [2024-06-28 04:22:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:22:26,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:22:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-28 04:22:26,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-28 04:22:26,696 INFO L175 Difference]: Start difference. First operand has 353 places, 493 transitions, 8651 flow. Second operand 8 states and 117 transitions. [2024-06-28 04:22:26,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 508 transitions, 9801 flow [2024-06-28 04:22:28,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 508 transitions, 9549 flow, removed 98 selfloop flow, removed 4 redundant places. [2024-06-28 04:22:28,260 INFO L231 Difference]: Finished difference. Result has 357 places, 496 transitions, 8628 flow [2024-06-28 04:22:28,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8399, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8628, PETRI_PLACES=357, PETRI_TRANSITIONS=496} [2024-06-28 04:22:28,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-28 04:22:28,261 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 496 transitions, 8628 flow [2024-06-28 04:22:28,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:28,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:28,262 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 04:22:28,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 04:22:28,262 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 04:22:28,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:28,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1651336136, now seen corresponding path program 4 times [2024-06-28 04:22:28,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:28,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986117198] [2024-06-28 04:22:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:28,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:30,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:30,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986117198] [2024-06-28 04:22:30,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986117198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:30,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:30,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:30,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313191158] [2024-06-28 04:22:30,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:30,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:30,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:30,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:30,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:30,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:22:30,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 496 transitions, 8628 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:30,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:30,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:22:30,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:32,820 INFO L124 PetriNetUnfolderBase]: 3190/4988 cut-off events. [2024-06-28 04:22:32,821 INFO L125 PetriNetUnfolderBase]: For 532038/532047 co-relation queries the response was YES. [2024-06-28 04:22:32,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52075 conditions, 4988 events. 3190/4988 cut-off events. For 532038/532047 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28365 event pairs, 577 based on Foata normal form. 5/4988 useless extension candidates. Maximal degree in co-relation 51900. Up to 4571 conditions per place. [2024-06-28 04:22:32,905 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 402 selfloop transitions, 135 changer transitions 0/541 dead transitions. [2024-06-28 04:22:32,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 541 transitions, 10600 flow [2024-06-28 04:22:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:22:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:22:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-28 04:22:32,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37317073170731707 [2024-06-28 04:22:32,916 INFO L175 Difference]: Start difference. First operand has 357 places, 496 transitions, 8628 flow. Second operand 10 states and 153 transitions. [2024-06-28 04:22:32,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 541 transitions, 10600 flow [2024-06-28 04:22:34,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 541 transitions, 10373 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:34,915 INFO L231 Difference]: Finished difference. Result has 364 places, 522 transitions, 9505 flow [2024-06-28 04:22:34,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8401, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9505, PETRI_PLACES=364, PETRI_TRANSITIONS=522} [2024-06-28 04:22:34,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-28 04:22:34,916 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 522 transitions, 9505 flow [2024-06-28 04:22:34,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:34,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:34,917 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 04:22:34,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 04:22:34,917 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 04:22:34,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:34,918 INFO L85 PathProgramCache]: Analyzing trace with hash -621203800, now seen corresponding path program 5 times [2024-06-28 04:22:34,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:34,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200319227] [2024-06-28 04:22:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:34,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:37,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:37,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200319227] [2024-06-28 04:22:37,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200319227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:37,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:37,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:37,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582413621] [2024-06-28 04:22:37,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:37,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:37,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:37,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:37,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:37,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:22:37,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 522 transitions, 9505 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:37,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:37,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:22:37,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:39,613 INFO L124 PetriNetUnfolderBase]: 3215/5023 cut-off events. [2024-06-28 04:22:39,613 INFO L125 PetriNetUnfolderBase]: For 558189/558198 co-relation queries the response was YES. [2024-06-28 04:22:39,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53654 conditions, 5023 events. 3215/5023 cut-off events. For 558189/558198 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28574 event pairs, 583 based on Foata normal form. 6/5024 useless extension candidates. Maximal degree in co-relation 53476. Up to 4677 conditions per place. [2024-06-28 04:22:39,696 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 444 selfloop transitions, 99 changer transitions 0/547 dead transitions. [2024-06-28 04:22:39,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 547 transitions, 11079 flow [2024-06-28 04:22:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:22:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:22:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:22:39,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 04:22:39,698 INFO L175 Difference]: Start difference. First operand has 364 places, 522 transitions, 9505 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:22:39,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 547 transitions, 11079 flow [2024-06-28 04:22:41,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 547 transitions, 10727 flow, removed 154 selfloop flow, removed 4 redundant places. [2024-06-28 04:22:41,660 INFO L231 Difference]: Finished difference. Result has 369 places, 532 transitions, 9873 flow [2024-06-28 04:22:41,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9197, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9873, PETRI_PLACES=369, PETRI_TRANSITIONS=532} [2024-06-28 04:22:41,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-28 04:22:41,661 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 532 transitions, 9873 flow [2024-06-28 04:22:41,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:41,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:41,661 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 04:22:41,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 04:22:41,661 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 04:22:41,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash -969886245, now seen corresponding path program 8 times [2024-06-28 04:22:41,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:41,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306136161] [2024-06-28 04:22:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:41,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:44,625 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 04:22:44,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:44,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306136161] [2024-06-28 04:22:44,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306136161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:44,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:44,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:44,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130611976] [2024-06-28 04:22:44,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:44,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:44,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:44,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:44,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:44,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:22:44,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 532 transitions, 9873 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:44,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:44,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:22:44,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:46,539 INFO L124 PetriNetUnfolderBase]: 3212/5019 cut-off events. [2024-06-28 04:22:46,539 INFO L125 PetriNetUnfolderBase]: For 544319/544328 co-relation queries the response was YES. [2024-06-28 04:22:46,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53804 conditions, 5019 events. 3212/5019 cut-off events. For 544319/544328 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28585 event pairs, 583 based on Foata normal form. 2/5016 useless extension candidates. Maximal degree in co-relation 53624. Up to 4746 conditions per place. [2024-06-28 04:22:46,628 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 476 selfloop transitions, 64 changer transitions 0/544 dead transitions. [2024-06-28 04:22:46,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 544 transitions, 10983 flow [2024-06-28 04:22:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:22:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:22:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 04:22:46,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-28 04:22:46,630 INFO L175 Difference]: Start difference. First operand has 369 places, 532 transitions, 9873 flow. Second operand 8 states and 119 transitions. [2024-06-28 04:22:46,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 544 transitions, 10983 flow [2024-06-28 04:22:48,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 544 transitions, 10534 flow, removed 173 selfloop flow, removed 4 redundant places. [2024-06-28 04:22:48,640 INFO L231 Difference]: Finished difference. Result has 373 places, 532 transitions, 9559 flow [2024-06-28 04:22:48,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9424, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9559, PETRI_PLACES=373, PETRI_TRANSITIONS=532} [2024-06-28 04:22:48,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-28 04:22:48,641 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 532 transitions, 9559 flow [2024-06-28 04:22:48,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:48,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:48,642 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 04:22:48,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 04:22:48,642 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 04:22:48,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1485701652, now seen corresponding path program 6 times [2024-06-28 04:22:48,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:48,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116490580] [2024-06-28 04:22:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:48,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:51,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:51,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116490580] [2024-06-28 04:22:51,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116490580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:51,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:51,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:51,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824933605] [2024-06-28 04:22:51,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:51,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:51,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:51,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:51,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:51,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:22:51,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 532 transitions, 9559 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:51,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:51,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:22:51,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:53,543 INFO L124 PetriNetUnfolderBase]: 3200/5003 cut-off events. [2024-06-28 04:22:53,543 INFO L125 PetriNetUnfolderBase]: For 545575/545584 co-relation queries the response was YES. [2024-06-28 04:22:53,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52871 conditions, 5003 events. 3200/5003 cut-off events. For 545575/545584 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28467 event pairs, 579 based on Foata normal form. 5/5003 useless extension candidates. Maximal degree in co-relation 52690. Up to 4644 conditions per place. [2024-06-28 04:22:53,629 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 427 selfloop transitions, 117 changer transitions 0/548 dead transitions. [2024-06-28 04:22:53,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 548 transitions, 10708 flow [2024-06-28 04:22:53,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 04:22:53,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-28 04:22:53,630 INFO L175 Difference]: Start difference. First operand has 373 places, 532 transitions, 9559 flow. Second operand 9 states and 139 transitions. [2024-06-28 04:22:53,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 548 transitions, 10708 flow [2024-06-28 04:22:55,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 548 transitions, 10371 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-28 04:22:55,434 INFO L231 Difference]: Finished difference. Result has 375 places, 532 transitions, 9473 flow [2024-06-28 04:22:55,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9222, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9473, PETRI_PLACES=375, PETRI_TRANSITIONS=532} [2024-06-28 04:22:55,435 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-28 04:22:55,435 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 532 transitions, 9473 flow [2024-06-28 04:22:55,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:55,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:55,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:55,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:22:55,436 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 04:22:55,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1087946612, now seen corresponding path program 7 times [2024-06-28 04:22:55,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:55,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481570020] [2024-06-28 04:22:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:55,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:58,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481570020] [2024-06-28 04:22:58,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481570020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:58,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:58,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625331938] [2024-06-28 04:22:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:58,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:58,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:58,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:58,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:58,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:22:58,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 532 transitions, 9473 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:58,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:58,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:22:58,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:00,434 INFO L124 PetriNetUnfolderBase]: 3254/5089 cut-off events. [2024-06-28 04:23:00,434 INFO L125 PetriNetUnfolderBase]: For 557747/557762 co-relation queries the response was YES. [2024-06-28 04:23:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53946 conditions, 5089 events. 3254/5089 cut-off events. For 557747/557762 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 29074 event pairs, 588 based on Foata normal form. 14/5099 useless extension candidates. Maximal degree in co-relation 53764. Up to 4756 conditions per place. [2024-06-28 04:23:00,520 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 500 selfloop transitions, 76 changer transitions 0/580 dead transitions. [2024-06-28 04:23:00,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 580 transitions, 11349 flow [2024-06-28 04:23:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:23:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:23:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-28 04:23:00,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 04:23:00,522 INFO L175 Difference]: Start difference. First operand has 375 places, 532 transitions, 9473 flow. Second operand 10 states and 155 transitions. [2024-06-28 04:23:00,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 580 transitions, 11349 flow [2024-06-28 04:23:02,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 580 transitions, 11118 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 04:23:02,330 INFO L231 Difference]: Finished difference. Result has 380 places, 550 transitions, 9876 flow [2024-06-28 04:23:02,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9242, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9876, PETRI_PLACES=380, PETRI_TRANSITIONS=550} [2024-06-28 04:23:02,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-28 04:23:02,331 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 550 transitions, 9876 flow [2024-06-28 04:23:02,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:02,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:02,331 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 04:23:02,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:23:02,331 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 04:23:02,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:02,333 INFO L85 PathProgramCache]: Analyzing trace with hash 55445896, now seen corresponding path program 8 times [2024-06-28 04:23:02,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:02,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651589398] [2024-06-28 04:23:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:02,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:04,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:04,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651589398] [2024-06-28 04:23:04,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651589398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:04,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:04,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:04,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761494752] [2024-06-28 04:23:04,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:04,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:04,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:04,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:04,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:04,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:23:04,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 550 transitions, 9876 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:04,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:04,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:23:04,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:07,135 INFO L124 PetriNetUnfolderBase]: 3312/5169 cut-off events. [2024-06-28 04:23:07,135 INFO L125 PetriNetUnfolderBase]: For 605114/605129 co-relation queries the response was YES. [2024-06-28 04:23:07,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56261 conditions, 5169 events. 3312/5169 cut-off events. For 605114/605129 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29546 event pairs, 586 based on Foata normal form. 14/5179 useless extension candidates. Maximal degree in co-relation 56078. Up to 4770 conditions per place. [2024-06-28 04:23:07,224 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 498 selfloop transitions, 83 changer transitions 0/585 dead transitions. [2024-06-28 04:23:07,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 585 transitions, 11764 flow [2024-06-28 04:23:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 04:23:07,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-28 04:23:07,226 INFO L175 Difference]: Start difference. First operand has 380 places, 550 transitions, 9876 flow. Second operand 9 states and 142 transitions. [2024-06-28 04:23:07,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 585 transitions, 11764 flow [2024-06-28 04:23:09,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 585 transitions, 11460 flow, removed 131 selfloop flow, removed 3 redundant places. [2024-06-28 04:23:09,170 INFO L231 Difference]: Finished difference. Result has 387 places, 560 transitions, 10250 flow [2024-06-28 04:23:09,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9622, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10250, PETRI_PLACES=387, PETRI_TRANSITIONS=560} [2024-06-28 04:23:09,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-28 04:23:09,171 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 560 transitions, 10250 flow [2024-06-28 04:23:09,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:09,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:09,171 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 04:23:09,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:23:09,172 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 04:23:09,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash 55059946, now seen corresponding path program 9 times [2024-06-28 04:23:09,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:09,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448968427] [2024-06-28 04:23:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:09,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:11,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:11,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448968427] [2024-06-28 04:23:11,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448968427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:11,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:11,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:11,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689251326] [2024-06-28 04:23:11,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:11,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:11,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:11,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:11,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:12,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:23:12,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 560 transitions, 10250 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:12,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:12,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:23:12,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:14,226 INFO L124 PetriNetUnfolderBase]: 3306/5161 cut-off events. [2024-06-28 04:23:14,226 INFO L125 PetriNetUnfolderBase]: For 614656/614671 co-relation queries the response was YES. [2024-06-28 04:23:14,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56537 conditions, 5161 events. 3306/5161 cut-off events. For 614656/614671 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29489 event pairs, 589 based on Foata normal form. 14/5171 useless extension candidates. Maximal degree in co-relation 56351. Up to 4809 conditions per place. [2024-06-28 04:23:14,301 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 511 selfloop transitions, 68 changer transitions 0/583 dead transitions. [2024-06-28 04:23:14,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 583 transitions, 11480 flow [2024-06-28 04:23:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-28 04:23:14,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-28 04:23:14,303 INFO L175 Difference]: Start difference. First operand has 387 places, 560 transitions, 10250 flow. Second operand 9 states and 138 transitions. [2024-06-28 04:23:14,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 583 transitions, 11480 flow [2024-06-28 04:23:16,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 583 transitions, 11178 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-28 04:23:16,118 INFO L231 Difference]: Finished difference. Result has 390 places, 560 transitions, 10090 flow [2024-06-28 04:23:16,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9948, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10090, PETRI_PLACES=390, PETRI_TRANSITIONS=560} [2024-06-28 04:23:16,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-28 04:23:16,119 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 560 transitions, 10090 flow [2024-06-28 04:23:16,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:16,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:16,120 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 04:23:16,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:23:16,120 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 04:23:16,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:16,120 INFO L85 PathProgramCache]: Analyzing trace with hash 437052330, now seen corresponding path program 10 times [2024-06-28 04:23:16,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:16,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628814616] [2024-06-28 04:23:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:16,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:18,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:18,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628814616] [2024-06-28 04:23:18,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628814616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:18,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:18,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:18,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200208737] [2024-06-28 04:23:18,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:18,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:18,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:18,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:18,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:18,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:23:18,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 560 transitions, 10090 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:18,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:18,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:23:18,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:21,211 INFO L124 PetriNetUnfolderBase]: 3315/5174 cut-off events. [2024-06-28 04:23:21,211 INFO L125 PetriNetUnfolderBase]: For 611507/611522 co-relation queries the response was YES. [2024-06-28 04:23:21,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56303 conditions, 5174 events. 3315/5174 cut-off events. For 611507/611522 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 29574 event pairs, 588 based on Foata normal form. 16/5186 useless extension candidates. Maximal degree in co-relation 56116. Up to 4886 conditions per place. [2024-06-28 04:23:21,298 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 542 selfloop transitions, 47 changer transitions 0/593 dead transitions. [2024-06-28 04:23:21,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 593 transitions, 11519 flow [2024-06-28 04:23:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 04:23:21,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-28 04:23:21,299 INFO L175 Difference]: Start difference. First operand has 390 places, 560 transitions, 10090 flow. Second operand 9 states and 142 transitions. [2024-06-28 04:23:21,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 593 transitions, 11519 flow [2024-06-28 04:23:23,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 593 transitions, 11315 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 04:23:23,139 INFO L231 Difference]: Finished difference. Result has 394 places, 566 transitions, 10175 flow [2024-06-28 04:23:23,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9892, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10175, PETRI_PLACES=394, PETRI_TRANSITIONS=566} [2024-06-28 04:23:23,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-28 04:23:23,140 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 566 transitions, 10175 flow [2024-06-28 04:23:23,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:23,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:23,140 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 04:23:23,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:23:23,141 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 04:23:23,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:23,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1195880190, now seen corresponding path program 4 times [2024-06-28 04:23:23,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:23,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849389678] [2024-06-28 04:23:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:23,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:27,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:27,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849389678] [2024-06-28 04:23:27,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849389678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:27,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:27,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:23:27,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998994129] [2024-06-28 04:23:27,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:27,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:23:27,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:27,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:23:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:23:27,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:23:27,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 566 transitions, 10175 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:27,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:27,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:23:27,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:29,413 INFO L124 PetriNetUnfolderBase]: 3346/5219 cut-off events. [2024-06-28 04:23:29,413 INFO L125 PetriNetUnfolderBase]: For 628304/628319 co-relation queries the response was YES. [2024-06-28 04:23:29,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57285 conditions, 5219 events. 3346/5219 cut-off events. For 628304/628319 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29866 event pairs, 585 based on Foata normal form. 14/5229 useless extension candidates. Maximal degree in co-relation 57096. Up to 4931 conditions per place. [2024-06-28 04:23:29,505 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 547 selfloop transitions, 49 changer transitions 0/600 dead transitions. [2024-06-28 04:23:29,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 600 transitions, 11994 flow [2024-06-28 04:23:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 04:23:29,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-28 04:23:29,507 INFO L175 Difference]: Start difference. First operand has 394 places, 566 transitions, 10175 flow. Second operand 9 states and 139 transitions. [2024-06-28 04:23:29,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 600 transitions, 11994 flow [2024-06-28 04:23:31,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 600 transitions, 11750 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-28 04:23:31,412 INFO L231 Difference]: Finished difference. Result has 397 places, 575 transitions, 10424 flow [2024-06-28 04:23:31,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9931, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10424, PETRI_PLACES=397, PETRI_TRANSITIONS=575} [2024-06-28 04:23:31,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-28 04:23:31,413 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 575 transitions, 10424 flow [2024-06-28 04:23:31,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:31,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:31,413 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 04:23:31,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 04:23:31,413 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:31,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:31,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1902106830, now seen corresponding path program 11 times [2024-06-28 04:23:31,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:31,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529462047] [2024-06-28 04:23:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:31,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:35,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:35,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529462047] [2024-06-28 04:23:35,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529462047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:35,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:35,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:35,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106722805] [2024-06-28 04:23:35,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:35,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:35,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:35,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:35,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:35,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:23:35,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 575 transitions, 10424 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:35,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:35,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:23:35,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:37,470 INFO L124 PetriNetUnfolderBase]: 3366/5233 cut-off events. [2024-06-28 04:23:37,470 INFO L125 PetriNetUnfolderBase]: For 656340/656349 co-relation queries the response was YES. [2024-06-28 04:23:37,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57911 conditions, 5233 events. 3366/5233 cut-off events. For 656340/656349 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 29763 event pairs, 589 based on Foata normal form. 5/5233 useless extension candidates. Maximal degree in co-relation 57722. Up to 4824 conditions per place. [2024-06-28 04:23:37,561 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 519 selfloop transitions, 85 changer transitions 0/608 dead transitions. [2024-06-28 04:23:37,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 608 transitions, 11999 flow [2024-06-28 04:23:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:23:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:23:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-28 04:23:37,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-28 04:23:37,563 INFO L175 Difference]: Start difference. First operand has 397 places, 575 transitions, 10424 flow. Second operand 10 states and 156 transitions. [2024-06-28 04:23:37,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 608 transitions, 11999 flow [2024-06-28 04:23:39,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 608 transitions, 11748 flow, removed 107 selfloop flow, removed 4 redundant places. [2024-06-28 04:23:39,573 INFO L231 Difference]: Finished difference. Result has 403 places, 579 transitions, 10568 flow [2024-06-28 04:23:39,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10173, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10568, PETRI_PLACES=403, PETRI_TRANSITIONS=579} [2024-06-28 04:23:39,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-28 04:23:39,574 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 579 transitions, 10568 flow [2024-06-28 04:23:39,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:39,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:39,574 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 04:23:39,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 04:23:39,574 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:39,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:39,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1258114278, now seen corresponding path program 12 times [2024-06-28 04:23:39,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:39,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830379721] [2024-06-28 04:23:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:39,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:43,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:43,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830379721] [2024-06-28 04:23:43,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830379721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:43,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:43,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:43,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752615719] [2024-06-28 04:23:43,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:43,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:43,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:43,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:43,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:23:43,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 579 transitions, 10568 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:43,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:43,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:23:43,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:45,585 INFO L124 PetriNetUnfolderBase]: 3386/5273 cut-off events. [2024-06-28 04:23:45,586 INFO L125 PetriNetUnfolderBase]: For 677253/677268 co-relation queries the response was YES. [2024-06-28 04:23:45,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59049 conditions, 5273 events. 3386/5273 cut-off events. For 677253/677268 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 30138 event pairs, 587 based on Foata normal form. 16/5285 useless extension candidates. Maximal degree in co-relation 58858. Up to 4973 conditions per place. [2024-06-28 04:23:45,681 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 553 selfloop transitions, 51 changer transitions 0/608 dead transitions. [2024-06-28 04:23:45,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 608 transitions, 12086 flow [2024-06-28 04:23:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 04:23:45,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-28 04:23:45,683 INFO L175 Difference]: Start difference. First operand has 403 places, 579 transitions, 10568 flow. Second operand 9 states and 142 transitions. [2024-06-28 04:23:45,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 608 transitions, 12086 flow [2024-06-28 04:23:47,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 608 transitions, 11725 flow, removed 98 selfloop flow, removed 8 redundant places. [2024-06-28 04:23:47,972 INFO L231 Difference]: Finished difference. Result has 404 places, 583 transitions, 10542 flow [2024-06-28 04:23:47,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10207, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10542, PETRI_PLACES=404, PETRI_TRANSITIONS=583} [2024-06-28 04:23:47,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-28 04:23:47,972 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 583 transitions, 10542 flow [2024-06-28 04:23:47,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:47,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:47,973 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 04:23:47,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 04:23:47,973 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:47,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:47,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1156817522, now seen corresponding path program 5 times [2024-06-28 04:23:47,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:47,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278204511] [2024-06-28 04:23:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:47,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:52,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:52,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278204511] [2024-06-28 04:23:52,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278204511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:52,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:52,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:52,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132658358] [2024-06-28 04:23:52,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:52,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:52,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:52,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:52,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:23:52,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 583 transitions, 10542 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:52,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:52,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:23:52,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:54,723 INFO L124 PetriNetUnfolderBase]: 3380/5267 cut-off events. [2024-06-28 04:23:54,724 INFO L125 PetriNetUnfolderBase]: For 675393/675408 co-relation queries the response was YES. [2024-06-28 04:23:54,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58828 conditions, 5267 events. 3380/5267 cut-off events. For 675393/675408 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 30177 event pairs, 586 based on Foata normal form. 14/5277 useless extension candidates. Maximal degree in co-relation 58636. Up to 4982 conditions per place. [2024-06-28 04:23:54,803 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 556 selfloop transitions, 48 changer transitions 0/608 dead transitions. [2024-06-28 04:23:54,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 608 transitions, 11842 flow [2024-06-28 04:23:54,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:54,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 04:23:54,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-28 04:23:54,805 INFO L175 Difference]: Start difference. First operand has 404 places, 583 transitions, 10542 flow. Second operand 9 states and 140 transitions. [2024-06-28 04:23:54,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 608 transitions, 11842 flow [2024-06-28 04:23:57,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 608 transitions, 11412 flow, removed 157 selfloop flow, removed 7 redundant places. [2024-06-28 04:23:57,042 INFO L231 Difference]: Finished difference. Result has 406 places, 583 transitions, 10214 flow [2024-06-28 04:23:57,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10112, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10214, PETRI_PLACES=406, PETRI_TRANSITIONS=583} [2024-06-28 04:23:57,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-28 04:23:57,043 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 583 transitions, 10214 flow [2024-06-28 04:23:57,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:57,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:57,043 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 04:23:57,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 04:23:57,044 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:23:57,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1552075290, now seen corresponding path program 13 times [2024-06-28 04:23:57,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:57,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833866398] [2024-06-28 04:23:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:57,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:00,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:00,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833866398] [2024-06-28 04:24:00,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833866398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:00,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:00,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:00,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015532629] [2024-06-28 04:24:00,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:00,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:00,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:00,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:00,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:00,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:24:00,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 583 transitions, 10214 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:00,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:00,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:24:00,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:02,353 INFO L124 PetriNetUnfolderBase]: 3400/5299 cut-off events. [2024-06-28 04:24:02,353 INFO L125 PetriNetUnfolderBase]: For 678883/678898 co-relation queries the response was YES. [2024-06-28 04:24:02,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58529 conditions, 5299 events. 3400/5299 cut-off events. For 678883/678898 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 30386 event pairs, 566 based on Foata normal form. 14/5309 useless extension candidates. Maximal degree in co-relation 58337. Up to 4837 conditions per place. [2024-06-28 04:24:02,445 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 495 selfloop transitions, 114 changer transitions 0/613 dead transitions. [2024-06-28 04:24:02,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 613 transitions, 11703 flow [2024-06-28 04:24:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:24:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:24:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-28 04:24:02,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3614190687361419 [2024-06-28 04:24:02,447 INFO L175 Difference]: Start difference. First operand has 406 places, 583 transitions, 10214 flow. Second operand 11 states and 163 transitions. [2024-06-28 04:24:02,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 613 transitions, 11703 flow [2024-06-28 04:24:04,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 613 transitions, 11599 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 04:24:04,848 INFO L231 Difference]: Finished difference. Result has 411 places, 589 transitions, 10569 flow [2024-06-28 04:24:04,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10110, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10569, PETRI_PLACES=411, PETRI_TRANSITIONS=589} [2024-06-28 04:24:04,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-28 04:24:04,849 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 589 transitions, 10569 flow [2024-06-28 04:24:04,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:04,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:04,850 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 04:24:04,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 04:24:04,850 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:04,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:04,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1559818656, now seen corresponding path program 6 times [2024-06-28 04:24:04,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:04,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180568944] [2024-06-28 04:24:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:04,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:08,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:08,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180568944] [2024-06-28 04:24:08,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180568944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:08,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:08,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:08,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958616315] [2024-06-28 04:24:08,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:08,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:08,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:08,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:24:08,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 589 transitions, 10569 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:08,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:08,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:24:08,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:11,128 INFO L124 PetriNetUnfolderBase]: 3478/5417 cut-off events. [2024-06-28 04:24:11,128 INFO L125 PetriNetUnfolderBase]: For 753268/753283 co-relation queries the response was YES. [2024-06-28 04:24:11,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62141 conditions, 5417 events. 3478/5417 cut-off events. For 753268/753283 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31174 event pairs, 597 based on Foata normal form. 16/5429 useless extension candidates. Maximal degree in co-relation 61947. Up to 5006 conditions per place. [2024-06-28 04:24:11,469 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 535 selfloop transitions, 92 changer transitions 0/631 dead transitions. [2024-06-28 04:24:11,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 631 transitions, 12974 flow [2024-06-28 04:24:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:24:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:24:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-28 04:24:11,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36807095343680707 [2024-06-28 04:24:11,471 INFO L175 Difference]: Start difference. First operand has 411 places, 589 transitions, 10569 flow. Second operand 11 states and 166 transitions. [2024-06-28 04:24:11,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 631 transitions, 12974 flow [2024-06-28 04:24:13,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 631 transitions, 12630 flow, removed 78 selfloop flow, removed 8 redundant places. [2024-06-28 04:24:13,410 INFO L231 Difference]: Finished difference. Result has 414 places, 606 transitions, 11116 flow [2024-06-28 04:24:13,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10225, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11116, PETRI_PLACES=414, PETRI_TRANSITIONS=606} [2024-06-28 04:24:13,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-28 04:24:13,411 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 606 transitions, 11116 flow [2024-06-28 04:24:13,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:13,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:13,412 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 04:24:13,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 04:24:13,412 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:13,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:13,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1547843976, now seen corresponding path program 7 times [2024-06-28 04:24:13,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:13,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433179105] [2024-06-28 04:24:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:13,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:17,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:17,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433179105] [2024-06-28 04:24:17,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433179105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:17,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:17,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:17,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133018253] [2024-06-28 04:24:17,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:17,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:17,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:17,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:24:17,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 606 transitions, 11116 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:17,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:17,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:24:17,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:19,488 INFO L124 PetriNetUnfolderBase]: 3472/5411 cut-off events. [2024-06-28 04:24:19,488 INFO L125 PetriNetUnfolderBase]: For 753364/753379 co-relation queries the response was YES. [2024-06-28 04:24:19,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62122 conditions, 5411 events. 3472/5411 cut-off events. For 753364/753379 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31146 event pairs, 578 based on Foata normal form. 14/5421 useless extension candidates. Maximal degree in co-relation 61927. Up to 4983 conditions per place. [2024-06-28 04:24:19,577 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 526 selfloop transitions, 105 changer transitions 0/635 dead transitions. [2024-06-28 04:24:19,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 635 transitions, 13114 flow [2024-06-28 04:24:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:24:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:24:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-28 04:24:19,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-28 04:24:19,580 INFO L175 Difference]: Start difference. First operand has 414 places, 606 transitions, 11116 flow. Second operand 9 states and 137 transitions. [2024-06-28 04:24:19,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 635 transitions, 13114 flow [2024-06-28 04:24:22,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 635 transitions, 12494 flow, removed 280 selfloop flow, removed 5 redundant places. [2024-06-28 04:24:22,409 INFO L231 Difference]: Finished difference. Result has 419 places, 613 transitions, 11242 flow [2024-06-28 04:24:22,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10672, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11242, PETRI_PLACES=419, PETRI_TRANSITIONS=613} [2024-06-28 04:24:22,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-28 04:24:22,410 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 613 transitions, 11242 flow [2024-06-28 04:24:22,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:22,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:22,410 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 04:24:22,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 04:24:22,410 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:22,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1916893432, now seen corresponding path program 8 times [2024-06-28 04:24:22,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:22,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642301167] [2024-06-28 04:24:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:22,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:25,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:25,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642301167] [2024-06-28 04:24:25,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642301167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:25,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:25,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:25,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250280464] [2024-06-28 04:24:25,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:25,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:25,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:25,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:25,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:24:25,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 613 transitions, 11242 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:25,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:25,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:24:25,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:28,103 INFO L124 PetriNetUnfolderBase]: 3466/5401 cut-off events. [2024-06-28 04:24:28,103 INFO L125 PetriNetUnfolderBase]: For 747912/747927 co-relation queries the response was YES. [2024-06-28 04:24:28,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61611 conditions, 5401 events. 3466/5401 cut-off events. For 747912/747927 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31089 event pairs, 599 based on Foata normal form. 14/5411 useless extension candidates. Maximal degree in co-relation 61415. Up to 5081 conditions per place. [2024-06-28 04:24:28,192 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 558 selfloop transitions, 71 changer transitions 0/633 dead transitions. [2024-06-28 04:24:28,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 633 transitions, 12570 flow [2024-06-28 04:24:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:24:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:24:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-28 04:24:28,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-28 04:24:28,193 INFO L175 Difference]: Start difference. First operand has 419 places, 613 transitions, 11242 flow. Second operand 9 states and 135 transitions. [2024-06-28 04:24:28,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 633 transitions, 12570 flow [2024-06-28 04:24:30,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 633 transitions, 12234 flow, removed 90 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:30,630 INFO L231 Difference]: Finished difference. Result has 422 places, 613 transitions, 11054 flow [2024-06-28 04:24:30,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10906, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11054, PETRI_PLACES=422, PETRI_TRANSITIONS=613} [2024-06-28 04:24:30,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-28 04:24:30,631 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 613 transitions, 11054 flow [2024-06-28 04:24:30,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:30,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:30,631 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 04:24:30,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 04:24:30,631 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:30,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:30,632 INFO L85 PathProgramCache]: Analyzing trace with hash -9956432, now seen corresponding path program 14 times [2024-06-28 04:24:30,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:30,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727362671] [2024-06-28 04:24:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:30,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:33,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:33,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727362671] [2024-06-28 04:24:33,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727362671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:33,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:33,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:33,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097876915] [2024-06-28 04:24:33,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:33,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:33,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:33,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:24:33,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 613 transitions, 11054 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:33,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:33,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:24:33,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:35,779 INFO L124 PetriNetUnfolderBase]: 3473/5402 cut-off events. [2024-06-28 04:24:35,779 INFO L125 PetriNetUnfolderBase]: For 752358/752367 co-relation queries the response was YES. [2024-06-28 04:24:35,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61365 conditions, 5402 events. 3473/5402 cut-off events. For 752358/752367 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 30960 event pairs, 604 based on Foata normal form. 3/5400 useless extension candidates. Maximal degree in co-relation 61168. Up to 5037 conditions per place. [2024-06-28 04:24:35,874 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 553 selfloop transitions, 79 changer transitions 0/636 dead transitions. [2024-06-28 04:24:35,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 636 transitions, 12604 flow [2024-06-28 04:24:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:24:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:24:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-28 04:24:35,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36829268292682926 [2024-06-28 04:24:35,876 INFO L175 Difference]: Start difference. First operand has 422 places, 613 transitions, 11054 flow. Second operand 10 states and 151 transitions. [2024-06-28 04:24:35,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 636 transitions, 12604 flow [2024-06-28 04:24:38,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 636 transitions, 12322 flow, removed 96 selfloop flow, removed 4 redundant places. [2024-06-28 04:24:38,544 INFO L231 Difference]: Finished difference. Result has 429 places, 615 transitions, 11000 flow [2024-06-28 04:24:38,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10772, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11000, PETRI_PLACES=429, PETRI_TRANSITIONS=615} [2024-06-28 04:24:38,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-28 04:24:38,545 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 615 transitions, 11000 flow [2024-06-28 04:24:38,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:38,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:38,545 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 04:24:38,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 04:24:38,546 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:38,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:38,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1868556680, now seen corresponding path program 15 times [2024-06-28 04:24:38,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:38,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439872502] [2024-06-28 04:24:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:38,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:41,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:41,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439872502] [2024-06-28 04:24:41,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439872502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:41,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:41,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:41,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416023901] [2024-06-28 04:24:41,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:41,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:41,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:41,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:41,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:41,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:24:41,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 615 transitions, 11000 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:41,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:41,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:24:41,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:44,192 INFO L124 PetriNetUnfolderBase]: 3541/5496 cut-off events. [2024-06-28 04:24:44,192 INFO L125 PetriNetUnfolderBase]: For 820866/820875 co-relation queries the response was YES. [2024-06-28 04:24:44,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64072 conditions, 5496 events. 3541/5496 cut-off events. For 820866/820875 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 31518 event pairs, 592 based on Foata normal form. 5/5496 useless extension candidates. Maximal degree in co-relation 63873. Up to 4785 conditions per place. [2024-06-28 04:24:44,293 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 449 selfloop transitions, 208 changer transitions 0/661 dead transitions. [2024-06-28 04:24:44,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 661 transitions, 13980 flow [2024-06-28 04:24:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:24:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:24:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-28 04:24:44,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37915742793791574 [2024-06-28 04:24:44,295 INFO L175 Difference]: Start difference. First operand has 429 places, 615 transitions, 11000 flow. Second operand 11 states and 171 transitions. [2024-06-28 04:24:44,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 661 transitions, 13980 flow [2024-06-28 04:24:47,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 661 transitions, 13846 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:47,246 INFO L231 Difference]: Finished difference. Result has 436 places, 627 transitions, 12135 flow [2024-06-28 04:24:47,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10866, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12135, PETRI_PLACES=436, PETRI_TRANSITIONS=627} [2024-06-28 04:24:47,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-28 04:24:47,247 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 627 transitions, 12135 flow [2024-06-28 04:24:47,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:47,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:47,247 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 04:24:47,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 04:24:47,247 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:47,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash -45263444, now seen corresponding path program 1 times [2024-06-28 04:24:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:47,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246225746] [2024-06-28 04:24:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:47,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:50,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:50,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246225746] [2024-06-28 04:24:50,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246225746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:50,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:50,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:50,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211332386] [2024-06-28 04:24:50,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:50,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:50,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:50,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:50,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:24:50,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 627 transitions, 12135 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:50,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:50,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:24:50,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:52,703 INFO L124 PetriNetUnfolderBase]: 3560/5521 cut-off events. [2024-06-28 04:24:52,703 INFO L125 PetriNetUnfolderBase]: For 837856/837865 co-relation queries the response was YES. [2024-06-28 04:24:52,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65548 conditions, 5521 events. 3560/5521 cut-off events. For 837856/837865 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31664 event pairs, 603 based on Foata normal form. 4/5520 useless extension candidates. Maximal degree in co-relation 65346. Up to 5201 conditions per place. [2024-06-28 04:24:52,802 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 580 selfloop transitions, 67 changer transitions 0/651 dead transitions. [2024-06-28 04:24:52,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 651 transitions, 13817 flow [2024-06-28 04:24:52,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-28 04:24:52,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-28 04:24:52,804 INFO L175 Difference]: Start difference. First operand has 436 places, 627 transitions, 12135 flow. Second operand 8 states and 122 transitions. [2024-06-28 04:24:52,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 651 transitions, 13817 flow [2024-06-28 04:24:55,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 651 transitions, 13275 flow, removed 179 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:55,851 INFO L231 Difference]: Finished difference. Result has 438 places, 634 transitions, 11972 flow [2024-06-28 04:24:55,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11600, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11972, PETRI_PLACES=438, PETRI_TRANSITIONS=634} [2024-06-28 04:24:55,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-28 04:24:55,852 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 634 transitions, 11972 flow [2024-06-28 04:24:55,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:55,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:55,852 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 04:24:55,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 04:24:55,852 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:55,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:55,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1884721218, now seen corresponding path program 2 times [2024-06-28 04:24:55,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:55,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909623831] [2024-06-28 04:24:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:55,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:58,486 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 04:24:58,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:58,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909623831] [2024-06-28 04:24:58,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909623831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:58,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:58,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:58,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414804898] [2024-06-28 04:24:58,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:58,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:58,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:58,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:24:58,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 634 transitions, 11972 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:58,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:58,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:24:58,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:00,727 INFO L124 PetriNetUnfolderBase]: 3554/5515 cut-off events. [2024-06-28 04:25:00,727 INFO L125 PetriNetUnfolderBase]: For 807965/807974 co-relation queries the response was YES. [2024-06-28 04:25:00,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64130 conditions, 5515 events. 3554/5515 cut-off events. For 807965/807974 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31634 event pairs, 604 based on Foata normal form. 3/5513 useless extension candidates. Maximal degree in co-relation 63926. Up to 5107 conditions per place. [2024-06-28 04:25:00,826 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 537 selfloop transitions, 116 changer transitions 0/657 dead transitions. [2024-06-28 04:25:00,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 657 transitions, 13564 flow [2024-06-28 04:25:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-28 04:25:00,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 04:25:00,828 INFO L175 Difference]: Start difference. First operand has 438 places, 634 transitions, 11972 flow. Second operand 8 states and 123 transitions. [2024-06-28 04:25:00,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 657 transitions, 13564 flow [2024-06-28 04:25:03,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 657 transitions, 13265 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:03,942 INFO L231 Difference]: Finished difference. Result has 440 places, 634 transitions, 11920 flow [2024-06-28 04:25:03,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11673, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11920, PETRI_PLACES=440, PETRI_TRANSITIONS=634} [2024-06-28 04:25:03,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-28 04:25:03,943 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 634 transitions, 11920 flow [2024-06-28 04:25:03,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:03,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:03,944 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 04:25:03,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 04:25:03,944 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:03,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash -450504620, now seen corresponding path program 16 times [2024-06-28 04:25:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:03,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803510614] [2024-06-28 04:25:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:06,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:06,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803510614] [2024-06-28 04:25:06,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803510614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:06,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:06,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:06,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616305897] [2024-06-28 04:25:06,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:06,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:06,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:06,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:06,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:25:06,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 634 transitions, 11920 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:06,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:06,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:25:06,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:08,594 INFO L124 PetriNetUnfolderBase]: 3579/5548 cut-off events. [2024-06-28 04:25:08,594 INFO L125 PetriNetUnfolderBase]: For 832762/832771 co-relation queries the response was YES. [2024-06-28 04:25:08,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64819 conditions, 5548 events. 3579/5548 cut-off events. For 832762/832771 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31792 event pairs, 604 based on Foata normal form. 5/5548 useless extension candidates. Maximal degree in co-relation 64614. Up to 5218 conditions per place. [2024-06-28 04:25:08,694 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 585 selfloop transitions, 70 changer transitions 0/659 dead transitions. [2024-06-28 04:25:08,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 659 transitions, 13664 flow [2024-06-28 04:25:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-28 04:25:08,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-28 04:25:08,695 INFO L175 Difference]: Start difference. First operand has 440 places, 634 transitions, 11920 flow. Second operand 9 states and 135 transitions. [2024-06-28 04:25:08,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 659 transitions, 13664 flow [2024-06-28 04:25:11,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 659 transitions, 13289 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-28 04:25:11,851 INFO L231 Difference]: Finished difference. Result has 443 places, 643 transitions, 12054 flow [2024-06-28 04:25:11,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11554, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12054, PETRI_PLACES=443, PETRI_TRANSITIONS=643} [2024-06-28 04:25:11,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-28 04:25:11,852 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 643 transitions, 12054 flow [2024-06-28 04:25:11,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:11,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:11,852 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 04:25:11,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 04:25:11,853 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:11,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:11,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1878286362, now seen corresponding path program 17 times [2024-06-28 04:25:11,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:11,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132867808] [2024-06-28 04:25:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:11,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:14,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:14,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132867808] [2024-06-28 04:25:14,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132867808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:14,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:14,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:14,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276177348] [2024-06-28 04:25:14,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:14,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:14,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:14,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:14,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:25:14,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 643 transitions, 12054 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:14,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:14,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:25:14,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:16,788 INFO L124 PetriNetUnfolderBase]: 3604/5587 cut-off events. [2024-06-28 04:25:16,789 INFO L125 PetriNetUnfolderBase]: For 838580/838589 co-relation queries the response was YES. [2024-06-28 04:25:16,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65473 conditions, 5587 events. 3604/5587 cut-off events. For 838580/838589 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 32063 event pairs, 604 based on Foata normal form. 3/5585 useless extension candidates. Maximal degree in co-relation 65266. Up to 5143 conditions per place. [2024-06-28 04:25:16,895 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 551 selfloop transitions, 128 changer transitions 0/683 dead transitions. [2024-06-28 04:25:16,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 683 transitions, 14440 flow [2024-06-28 04:25:16,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:25:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:25:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-28 04:25:16,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36341463414634145 [2024-06-28 04:25:16,896 INFO L175 Difference]: Start difference. First operand has 443 places, 643 transitions, 12054 flow. Second operand 10 states and 149 transitions. [2024-06-28 04:25:16,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 683 transitions, 14440 flow [2024-06-28 04:25:20,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 683 transitions, 13915 flow, removed 197 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:20,213 INFO L231 Difference]: Finished difference. Result has 450 places, 663 transitions, 12637 flow [2024-06-28 04:25:20,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11683, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12637, PETRI_PLACES=450, PETRI_TRANSITIONS=663} [2024-06-28 04:25:20,214 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-28 04:25:20,214 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 663 transitions, 12637 flow [2024-06-28 04:25:20,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:20,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:20,215 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 04:25:20,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 04:25:20,215 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:20,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:20,216 INFO L85 PathProgramCache]: Analyzing trace with hash -273373100, now seen corresponding path program 18 times [2024-06-28 04:25:20,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:20,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211908858] [2024-06-28 04:25:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:22,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:22,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211908858] [2024-06-28 04:25:22,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211908858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:22,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:22,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:22,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761485666] [2024-06-28 04:25:22,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:22,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:22,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:22,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:25:22,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 663 transitions, 12637 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:22,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:22,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:25:22,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:25,203 INFO L124 PetriNetUnfolderBase]: 3598/5579 cut-off events. [2024-06-28 04:25:25,204 INFO L125 PetriNetUnfolderBase]: For 837633/837642 co-relation queries the response was YES. [2024-06-28 04:25:25,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65116 conditions, 5579 events. 3598/5579 cut-off events. For 837633/837642 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 32024 event pairs, 609 based on Foata normal form. 3/5577 useless extension candidates. Maximal degree in co-relation 64905. Up to 5207 conditions per place. [2024-06-28 04:25:25,310 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 567 selfloop transitions, 111 changer transitions 0/682 dead transitions. [2024-06-28 04:25:25,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 682 transitions, 14124 flow [2024-06-28 04:25:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:25:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:25:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-28 04:25:25,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35609756097560974 [2024-06-28 04:25:25,312 INFO L175 Difference]: Start difference. First operand has 450 places, 663 transitions, 12637 flow. Second operand 10 states and 146 transitions. [2024-06-28 04:25:25,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 682 transitions, 14124 flow [2024-06-28 04:25:28,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 682 transitions, 13676 flow, removed 195 selfloop flow, removed 4 redundant places. [2024-06-28 04:25:29,008 INFO L231 Difference]: Finished difference. Result has 456 places, 663 transitions, 12420 flow [2024-06-28 04:25:29,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12189, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12420, PETRI_PLACES=456, PETRI_TRANSITIONS=663} [2024-06-28 04:25:29,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-28 04:25:29,009 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 663 transitions, 12420 flow [2024-06-28 04:25:29,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:29,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:29,010 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 04:25:29,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 04:25:29,010 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:29,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:29,010 INFO L85 PathProgramCache]: Analyzing trace with hash -17303432, now seen corresponding path program 19 times [2024-06-28 04:25:29,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:29,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173102120] [2024-06-28 04:25:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:29,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:31,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:31,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173102120] [2024-06-28 04:25:31,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173102120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:31,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:31,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:31,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434932662] [2024-06-28 04:25:31,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:31,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:31,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:31,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:31,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:25:31,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 663 transitions, 12420 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:31,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:31,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:25:31,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:34,167 INFO L124 PetriNetUnfolderBase]: 3618/5609 cut-off events. [2024-06-28 04:25:34,168 INFO L125 PetriNetUnfolderBase]: For 858696/858705 co-relation queries the response was YES. [2024-06-28 04:25:34,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65498 conditions, 5609 events. 3618/5609 cut-off events. For 858696/858705 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32257 event pairs, 604 based on Foata normal form. 5/5609 useless extension candidates. Maximal degree in co-relation 65285. Up to 5303 conditions per place. [2024-06-28 04:25:34,269 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 624 selfloop transitions, 58 changer transitions 0/686 dead transitions. [2024-06-28 04:25:34,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 686 transitions, 14109 flow [2024-06-28 04:25:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-28 04:25:34,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-28 04:25:34,271 INFO L175 Difference]: Start difference. First operand has 456 places, 663 transitions, 12420 flow. Second operand 9 states and 133 transitions. [2024-06-28 04:25:34,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 686 transitions, 14109 flow [2024-06-28 04:25:38,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 686 transitions, 13832 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 04:25:38,308 INFO L231 Difference]: Finished difference. Result has 458 places, 667 transitions, 12462 flow [2024-06-28 04:25:38,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12143, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12462, PETRI_PLACES=458, PETRI_TRANSITIONS=667} [2024-06-28 04:25:38,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-28 04:25:38,309 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 667 transitions, 12462 flow [2024-06-28 04:25:38,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:38,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:38,309 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 04:25:38,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 04:25:38,309 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:38,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:38,310 INFO L85 PathProgramCache]: Analyzing trace with hash -17308082, now seen corresponding path program 20 times [2024-06-28 04:25:38,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:38,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339123074] [2024-06-28 04:25:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:38,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:41,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:41,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339123074] [2024-06-28 04:25:41,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339123074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:41,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:41,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:41,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750736542] [2024-06-28 04:25:41,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:41,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:41,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:41,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:41,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:41,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:25:41,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 667 transitions, 12462 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:41,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:41,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:25:41,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:43,247 INFO L124 PetriNetUnfolderBase]: 3612/5597 cut-off events. [2024-06-28 04:25:43,248 INFO L125 PetriNetUnfolderBase]: For 849496/849505 co-relation queries the response was YES. [2024-06-28 04:25:43,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65128 conditions, 5597 events. 3612/5597 cut-off events. For 849496/849505 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32142 event pairs, 609 based on Foata normal form. 3/5595 useless extension candidates. Maximal degree in co-relation 64914. Up to 5315 conditions per place. [2024-06-28 04:25:43,355 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 630 selfloop transitions, 58 changer transitions 0/692 dead transitions. [2024-06-28 04:25:43,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 692 transitions, 14198 flow [2024-06-28 04:25:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:25:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:25:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2024-06-28 04:25:43,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.348780487804878 [2024-06-28 04:25:43,357 INFO L175 Difference]: Start difference. First operand has 458 places, 667 transitions, 12462 flow. Second operand 10 states and 143 transitions. [2024-06-28 04:25:43,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 692 transitions, 14198 flow [2024-06-28 04:25:46,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 692 transitions, 13844 flow, removed 120 selfloop flow, removed 7 redundant places. [2024-06-28 04:25:47,008 INFO L231 Difference]: Finished difference. Result has 463 places, 675 transitions, 12558 flow [2024-06-28 04:25:47,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12193, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12558, PETRI_PLACES=463, PETRI_TRANSITIONS=675} [2024-06-28 04:25:47,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-28 04:25:47,009 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 675 transitions, 12558 flow [2024-06-28 04:25:47,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:47,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:47,009 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 04:25:47,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 04:25:47,009 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:47,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:47,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2029635064, now seen corresponding path program 9 times [2024-06-28 04:25:47,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:47,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315416119] [2024-06-28 04:25:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:47,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:50,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:50,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315416119] [2024-06-28 04:25:50,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315416119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:50,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:50,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:50,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360043102] [2024-06-28 04:25:50,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:50,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:50,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:50,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:50,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:50,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:25:50,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 675 transitions, 12558 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:50,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:50,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:25:50,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:52,353 INFO L124 PetriNetUnfolderBase]: 3606/5603 cut-off events. [2024-06-28 04:25:52,353 INFO L125 PetriNetUnfolderBase]: For 847823/847838 co-relation queries the response was YES. [2024-06-28 04:25:52,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64642 conditions, 5603 events. 3606/5603 cut-off events. For 847823/847838 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32320 event pairs, 580 based on Foata normal form. 14/5613 useless extension candidates. Maximal degree in co-relation 64425. Up to 5278 conditions per place. [2024-06-28 04:25:52,463 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 622 selfloop transitions, 68 changer transitions 0/694 dead transitions. [2024-06-28 04:25:52,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 694 transitions, 14006 flow [2024-06-28 04:25:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:25:52,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 04:25:52,465 INFO L175 Difference]: Start difference. First operand has 463 places, 675 transitions, 12558 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:25:52,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 694 transitions, 14006 flow [2024-06-28 04:25:56,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 694 transitions, 13455 flow, removed 142 selfloop flow, removed 9 redundant places. [2024-06-28 04:25:56,407 INFO L231 Difference]: Finished difference. Result has 462 places, 675 transitions, 12153 flow [2024-06-28 04:25:56,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12007, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12153, PETRI_PLACES=462, PETRI_TRANSITIONS=675} [2024-06-28 04:25:56,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-28 04:25:56,408 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 675 transitions, 12153 flow [2024-06-28 04:25:56,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:56,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:56,409 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 04:25:56,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 04:25:56,410 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:56,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:56,411 INFO L85 PathProgramCache]: Analyzing trace with hash -272942572, now seen corresponding path program 1 times [2024-06-28 04:25:56,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:56,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799233136] [2024-06-28 04:25:56,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:56,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:59,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:59,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799233136] [2024-06-28 04:25:59,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799233136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:59,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:59,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:25:59,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996001189] [2024-06-28 04:25:59,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:59,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:25:59,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:59,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:25:59,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:25:59,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:25:59,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 675 transitions, 12153 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:59,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:59,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:25:59,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:02,161 INFO L124 PetriNetUnfolderBase]: 3613/5604 cut-off events. [2024-06-28 04:26:02,161 INFO L125 PetriNetUnfolderBase]: For 877650/877650 co-relation queries the response was YES. [2024-06-28 04:26:02,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63719 conditions, 5604 events. 3613/5604 cut-off events. For 877650/877650 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 32294 event pairs, 617 based on Foata normal form. 12/5614 useless extension candidates. Maximal degree in co-relation 63503. Up to 5295 conditions per place. [2024-06-28 04:26:02,271 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 661 selfloop transitions, 35 changer transitions 0/700 dead transitions. [2024-06-28 04:26:02,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 700 transitions, 13820 flow [2024-06-28 04:26:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:26:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:26:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-28 04:26:02,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439024390243902 [2024-06-28 04:26:02,272 INFO L175 Difference]: Start difference. First operand has 462 places, 675 transitions, 12153 flow. Second operand 10 states and 141 transitions. [2024-06-28 04:26:02,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 700 transitions, 13820 flow [2024-06-28 04:26:05,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 700 transitions, 13606 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-28 04:26:05,957 INFO L231 Difference]: Finished difference. Result has 464 places, 676 transitions, 12045 flow [2024-06-28 04:26:05,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11939, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12045, PETRI_PLACES=464, PETRI_TRANSITIONS=676} [2024-06-28 04:26:05,957 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-28 04:26:05,958 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 676 transitions, 12045 flow [2024-06-28 04:26:05,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:05,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:05,958 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 04:26:05,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 04:26:05,958 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:05,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:05,959 INFO L85 PathProgramCache]: Analyzing trace with hash -36767212, now seen corresponding path program 2 times [2024-06-28 04:26:05,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:05,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67072745] [2024-06-28 04:26:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:05,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:08,890 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 04:26:08,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:08,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67072745] [2024-06-28 04:26:08,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67072745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:08,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:08,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:08,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251855076] [2024-06-28 04:26:08,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:08,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:08,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:08,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:08,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:08,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:26:08,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 676 transitions, 12045 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 04:26:08,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:08,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:26:08,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:11,094 INFO L124 PetriNetUnfolderBase]: 3600/5585 cut-off events. [2024-06-28 04:26:11,094 INFO L125 PetriNetUnfolderBase]: For 816991/816991 co-relation queries the response was YES. [2024-06-28 04:26:11,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62775 conditions, 5585 events. 3600/5585 cut-off events. For 816991/816991 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 32220 event pairs, 611 based on Foata normal form. 6/5589 useless extension candidates. Maximal degree in co-relation 62559. Up to 5392 conditions per place. [2024-06-28 04:26:11,194 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 671 selfloop transitions, 19 changer transitions 0/694 dead transitions. [2024-06-28 04:26:11,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 694 transitions, 13519 flow [2024-06-28 04:26:11,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:11,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-28 04:26:11,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33604336043360433 [2024-06-28 04:26:11,196 INFO L175 Difference]: Start difference. First operand has 464 places, 676 transitions, 12045 flow. Second operand 9 states and 124 transitions. [2024-06-28 04:26:11,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 694 transitions, 13519 flow [2024-06-28 04:26:14,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 694 transitions, 13432 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 04:26:14,841 INFO L231 Difference]: Finished difference. Result has 466 places, 676 transitions, 12000 flow [2024-06-28 04:26:14,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11958, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12000, PETRI_PLACES=466, PETRI_TRANSITIONS=676} [2024-06-28 04:26:14,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-28 04:26:14,842 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 676 transitions, 12000 flow [2024-06-28 04:26:14,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 04:26:14,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:14,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:26:14,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 04:26:14,843 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:14,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:14,843 INFO L85 PathProgramCache]: Analyzing trace with hash 390827453, now seen corresponding path program 1 times [2024-06-28 04:26:14,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:14,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874010531] [2024-06-28 04:26:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:14,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:17,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:17,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874010531] [2024-06-28 04:26:17,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874010531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:17,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:17,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:17,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562026070] [2024-06-28 04:26:17,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:17,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:17,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:17,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:17,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:17,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:26:17,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 676 transitions, 12000 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:17,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:17,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:26:17,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:20,199 INFO L124 PetriNetUnfolderBase]: 3621/5614 cut-off events. [2024-06-28 04:26:20,199 INFO L125 PetriNetUnfolderBase]: For 816942/816951 co-relation queries the response was YES. [2024-06-28 04:26:20,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63198 conditions, 5614 events. 3621/5614 cut-off events. For 816942/816951 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 32238 event pairs, 484 based on Foata normal form. 3/5612 useless extension candidates. Maximal degree in co-relation 62981. Up to 5262 conditions per place. [2024-06-28 04:26:20,294 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 664 selfloop transitions, 35 changer transitions 0/703 dead transitions. [2024-06-28 04:26:20,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 703 transitions, 13799 flow [2024-06-28 04:26:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:26:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:26:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 04:26:20,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-28 04:26:20,296 INFO L175 Difference]: Start difference. First operand has 466 places, 676 transitions, 12000 flow. Second operand 7 states and 114 transitions. [2024-06-28 04:26:20,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 703 transitions, 13799 flow [2024-06-28 04:26:24,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 703 transitions, 13724 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-28 04:26:24,295 INFO L231 Difference]: Finished difference. Result has 466 places, 680 transitions, 12141 flow [2024-06-28 04:26:24,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11925, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12141, PETRI_PLACES=466, PETRI_TRANSITIONS=680} [2024-06-28 04:26:24,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-28 04:26:24,296 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 680 transitions, 12141 flow [2024-06-28 04:26:24,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:24,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:24,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:26:24,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 04:26:24,296 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:24,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:24,298 INFO L85 PathProgramCache]: Analyzing trace with hash -607584835, now seen corresponding path program 2 times [2024-06-28 04:26:24,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:24,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23024805] [2024-06-28 04:26:24,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:24,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:27,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:27,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23024805] [2024-06-28 04:26:27,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23024805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:27,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:27,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:27,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999375656] [2024-06-28 04:26:27,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:27,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:27,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:27,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:27,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:26:27,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 680 transitions, 12141 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:27,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:27,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:26:27,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:29,682 INFO L124 PetriNetUnfolderBase]: 3616/5607 cut-off events. [2024-06-28 04:26:29,683 INFO L125 PetriNetUnfolderBase]: For 815889/815898 co-relation queries the response was YES. [2024-06-28 04:26:29,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63099 conditions, 5607 events. 3616/5607 cut-off events. For 815889/815898 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 32168 event pairs, 482 based on Foata normal form. 3/5605 useless extension candidates. Maximal degree in co-relation 62881. Up to 5286 conditions per place. [2024-06-28 04:26:29,775 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 663 selfloop transitions, 33 changer transitions 0/700 dead transitions. [2024-06-28 04:26:29,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 700 transitions, 13622 flow [2024-06-28 04:26:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:26:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:26:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 04:26:29,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-28 04:26:29,777 INFO L175 Difference]: Start difference. First operand has 466 places, 680 transitions, 12141 flow. Second operand 7 states and 108 transitions. [2024-06-28 04:26:29,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 700 transitions, 13622 flow [2024-06-28 04:26:33,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 700 transitions, 13467 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-28 04:26:33,169 INFO L231 Difference]: Finished difference. Result has 469 places, 682 transitions, 12104 flow [2024-06-28 04:26:33,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11986, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12104, PETRI_PLACES=469, PETRI_TRANSITIONS=682} [2024-06-28 04:26:33,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-28 04:26:33,170 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 682 transitions, 12104 flow [2024-06-28 04:26:33,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:33,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:33,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:26:33,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 04:26:33,171 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:33,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1984445811, now seen corresponding path program 3 times [2024-06-28 04:26:33,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:33,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530609242] [2024-06-28 04:26:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:33,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:36,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530609242] [2024-06-28 04:26:36,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530609242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:36,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:36,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:36,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234903394] [2024-06-28 04:26:36,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:36,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:36,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:36,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:26:36,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 682 transitions, 12104 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:36,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:36,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:26:36,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:39,004 INFO L124 PetriNetUnfolderBase]: 3624/5619 cut-off events. [2024-06-28 04:26:39,005 INFO L125 PetriNetUnfolderBase]: For 819179/819188 co-relation queries the response was YES. [2024-06-28 04:26:39,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63158 conditions, 5619 events. 3624/5619 cut-off events. For 819179/819188 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 32400 event pairs, 589 based on Foata normal form. 3/5617 useless extension candidates. Maximal degree in co-relation 62939. Up to 5131 conditions per place. [2024-06-28 04:26:39,093 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 628 selfloop transitions, 75 changer transitions 0/707 dead transitions. [2024-06-28 04:26:39,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 707 transitions, 13903 flow [2024-06-28 04:26:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:26:39,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:26:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 04:26:39,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-28 04:26:39,095 INFO L175 Difference]: Start difference. First operand has 469 places, 682 transitions, 12104 flow. Second operand 7 states and 116 transitions. [2024-06-28 04:26:39,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 707 transitions, 13903 flow [2024-06-28 04:26:42,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 707 transitions, 13810 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 04:26:42,484 INFO L231 Difference]: Finished difference. Result has 472 places, 685 transitions, 12311 flow [2024-06-28 04:26:42,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12011, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12311, PETRI_PLACES=472, PETRI_TRANSITIONS=685} [2024-06-28 04:26:42,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-28 04:26:42,485 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 685 transitions, 12311 flow [2024-06-28 04:26:42,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:42,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:42,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:26:42,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 04:26:42,486 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:42,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:42,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1992064371, now seen corresponding path program 4 times [2024-06-28 04:26:42,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:42,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154674446] [2024-06-28 04:26:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:42,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:46,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:46,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154674446] [2024-06-28 04:26:46,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154674446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:46,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:46,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:46,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470947392] [2024-06-28 04:26:46,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:46,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:46,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:46,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:46,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:46,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:26:46,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 685 transitions, 12311 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:46,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:46,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:26:46,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:48,360 INFO L124 PetriNetUnfolderBase]: 3632/5631 cut-off events. [2024-06-28 04:26:48,361 INFO L125 PetriNetUnfolderBase]: For 833157/833166 co-relation queries the response was YES. [2024-06-28 04:26:48,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63748 conditions, 5631 events. 3632/5631 cut-off events. For 833157/833166 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 32448 event pairs, 605 based on Foata normal form. 3/5629 useless extension candidates. Maximal degree in co-relation 63527. Up to 5212 conditions per place. [2024-06-28 04:26:48,454 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 608 selfloop transitions, 92 changer transitions 0/704 dead transitions. [2024-06-28 04:26:48,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 704 transitions, 13868 flow [2024-06-28 04:26:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:26:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:26:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 04:26:48,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:26:48,455 INFO L175 Difference]: Start difference. First operand has 472 places, 685 transitions, 12311 flow. Second operand 7 states and 112 transitions. [2024-06-28 04:26:48,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 704 transitions, 13868 flow [2024-06-28 04:26:52,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 704 transitions, 13637 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-28 04:26:52,269 INFO L231 Difference]: Finished difference. Result has 475 places, 688 transitions, 12395 flow [2024-06-28 04:26:52,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12080, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12395, PETRI_PLACES=475, PETRI_TRANSITIONS=688} [2024-06-28 04:26:52,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-28 04:26:52,270 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 688 transitions, 12395 flow [2024-06-28 04:26:52,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:52,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:52,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:26:52,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 04:26:52,271 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:52,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:52,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2067760363, now seen corresponding path program 5 times [2024-06-28 04:26:52,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:52,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326189542] [2024-06-28 04:26:52,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:52,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:55,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:55,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326189542] [2024-06-28 04:26:55,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326189542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:55,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:55,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:55,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121183031] [2024-06-28 04:26:55,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:55,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:55,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:55,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:55,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:55,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:26:55,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 688 transitions, 12395 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:55,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:55,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:26:55,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:58,062 INFO L124 PetriNetUnfolderBase]: 3635/5636 cut-off events. [2024-06-28 04:26:58,062 INFO L125 PetriNetUnfolderBase]: For 844134/844143 co-relation queries the response was YES. [2024-06-28 04:26:58,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63691 conditions, 5636 events. 3635/5636 cut-off events. For 844134/844143 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 32505 event pairs, 555 based on Foata normal form. 5/5636 useless extension candidates. Maximal degree in co-relation 63469. Up to 4987 conditions per place. [2024-06-28 04:26:58,159 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 555 selfloop transitions, 152 changer transitions 0/711 dead transitions. [2024-06-28 04:26:58,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 711 transitions, 14178 flow [2024-06-28 04:26:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 04:26:58,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-28 04:26:58,160 INFO L175 Difference]: Start difference. First operand has 475 places, 688 transitions, 12395 flow. Second operand 8 states and 129 transitions. [2024-06-28 04:26:58,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 711 transitions, 14178 flow [2024-06-28 04:27:01,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 711 transitions, 13864 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:01,737 INFO L231 Difference]: Finished difference. Result has 479 places, 690 transitions, 12582 flow [2024-06-28 04:27:01,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12081, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12582, PETRI_PLACES=479, PETRI_TRANSITIONS=690} [2024-06-28 04:27:01,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-28 04:27:01,737 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 690 transitions, 12582 flow [2024-06-28 04:27:01,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:01,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:01,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:01,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 04:27:01,738 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:01,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2015175751, now seen corresponding path program 6 times [2024-06-28 04:27:01,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:01,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344739097] [2024-06-28 04:27:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:01,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:04,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:04,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344739097] [2024-06-28 04:27:04,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344739097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:04,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:04,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294595760] [2024-06-28 04:27:04,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:04,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:04,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:04,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:27:04,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 690 transitions, 12582 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:04,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:04,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:27:04,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:07,431 INFO L124 PetriNetUnfolderBase]: 3715/5756 cut-off events. [2024-06-28 04:27:07,431 INFO L125 PetriNetUnfolderBase]: For 938071/938080 co-relation queries the response was YES. [2024-06-28 04:27:07,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67916 conditions, 5756 events. 3715/5756 cut-off events. For 938071/938080 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 33252 event pairs, 558 based on Foata normal form. 3/5754 useless extension candidates. Maximal degree in co-relation 67692. Up to 4955 conditions per place. [2024-06-28 04:27:07,528 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 589 selfloop transitions, 127 changer transitions 0/720 dead transitions. [2024-06-28 04:27:07,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 720 transitions, 14679 flow [2024-06-28 04:27:07,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:07,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:27:07,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-28 04:27:07,529 INFO L175 Difference]: Start difference. First operand has 479 places, 690 transitions, 12582 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:27:07,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 720 transitions, 14679 flow [2024-06-28 04:27:11,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 720 transitions, 14435 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 04:27:11,648 INFO L231 Difference]: Finished difference. Result has 481 places, 696 transitions, 12931 flow [2024-06-28 04:27:11,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12343, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12931, PETRI_PLACES=481, PETRI_TRANSITIONS=696} [2024-06-28 04:27:11,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-28 04:27:11,648 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 696 transitions, 12931 flow [2024-06-28 04:27:11,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:11,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:11,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:11,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 04:27:11,649 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:11,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:11,649 INFO L85 PathProgramCache]: Analyzing trace with hash -467278357, now seen corresponding path program 7 times [2024-06-28 04:27:11,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:11,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154669453] [2024-06-28 04:27:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:11,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:17,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:17,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154669453] [2024-06-28 04:27:17,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154669453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:17,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:17,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:17,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059048212] [2024-06-28 04:27:17,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:17,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:17,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:17,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:17,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:17,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:27:17,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 696 transitions, 12931 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:17,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:17,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:27:17,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:19,919 INFO L124 PetriNetUnfolderBase]: 3710/5759 cut-off events. [2024-06-28 04:27:19,919 INFO L125 PetriNetUnfolderBase]: For 945230/945245 co-relation queries the response was YES. [2024-06-28 04:27:20,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68476 conditions, 5759 events. 3710/5759 cut-off events. For 945230/945245 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 33457 event pairs, 616 based on Foata normal form. 14/5769 useless extension candidates. Maximal degree in co-relation 68251. Up to 5447 conditions per place. [2024-06-28 04:27:20,034 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 646 selfloop transitions, 66 changer transitions 0/716 dead transitions. [2024-06-28 04:27:20,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 716 transitions, 14509 flow [2024-06-28 04:27:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-28 04:27:20,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-28 04:27:20,036 INFO L175 Difference]: Start difference. First operand has 481 places, 696 transitions, 12931 flow. Second operand 8 states and 120 transitions. [2024-06-28 04:27:20,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 716 transitions, 14509 flow [2024-06-28 04:27:24,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 716 transitions, 14336 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 04:27:24,249 INFO L231 Difference]: Finished difference. Result has 482 places, 698 transitions, 13006 flow [2024-06-28 04:27:24,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12758, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13006, PETRI_PLACES=482, PETRI_TRANSITIONS=698} [2024-06-28 04:27:24,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-28 04:27:24,249 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 698 transitions, 13006 flow [2024-06-28 04:27:24,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:24,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:24,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:24,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 04:27:24,250 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:24,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash -633290983, now seen corresponding path program 1 times [2024-06-28 04:27:24,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:24,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264781283] [2024-06-28 04:27:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:24,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:27,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264781283] [2024-06-28 04:27:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264781283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:27,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:27,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:27:27,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777615633] [2024-06-28 04:27:27,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:27,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:27:27,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:27,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:27:27,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:27:27,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:27:27,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 698 transitions, 13006 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:27,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:27,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:27:27,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:30,226 INFO L124 PetriNetUnfolderBase]: 3784/5863 cut-off events. [2024-06-28 04:27:30,226 INFO L125 PetriNetUnfolderBase]: For 1050528/1050537 co-relation queries the response was YES. [2024-06-28 04:27:30,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70954 conditions, 5863 events. 3784/5863 cut-off events. For 1050528/1050537 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 34001 event pairs, 554 based on Foata normal form. 9/5867 useless extension candidates. Maximal degree in co-relation 70729. Up to 5060 conditions per place. [2024-06-28 04:27:30,338 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 621 selfloop transitions, 108 changer transitions 0/733 dead transitions. [2024-06-28 04:27:30,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 733 transitions, 15110 flow [2024-06-28 04:27:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:27:30,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-28 04:27:30,339 INFO L175 Difference]: Start difference. First operand has 482 places, 698 transitions, 13006 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:27:30,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 733 transitions, 15110 flow [2024-06-28 04:27:34,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 733 transitions, 14884 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-28 04:27:34,811 INFO L231 Difference]: Finished difference. Result has 484 places, 700 transitions, 13095 flow [2024-06-28 04:27:34,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12780, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13095, PETRI_PLACES=484, PETRI_TRANSITIONS=700} [2024-06-28 04:27:34,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-28 04:27:34,812 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 700 transitions, 13095 flow [2024-06-28 04:27:34,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:34,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:34,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:34,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 04:27:34,813 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:34,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:34,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1989272821, now seen corresponding path program 2 times [2024-06-28 04:27:34,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:34,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107301865] [2024-06-28 04:27:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:34,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:38,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:38,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107301865] [2024-06-28 04:27:38,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107301865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:38,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:38,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:27:38,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616157573] [2024-06-28 04:27:38,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:38,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:27:38,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:38,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:27:38,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:27:38,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:27:38,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 700 transitions, 13095 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:38,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:38,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:27:38,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:40,709 INFO L124 PetriNetUnfolderBase]: 3766/5837 cut-off events. [2024-06-28 04:27:40,709 INFO L125 PetriNetUnfolderBase]: For 1017241/1017250 co-relation queries the response was YES. [2024-06-28 04:27:40,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69899 conditions, 5837 events. 3766/5837 cut-off events. For 1017241/1017250 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 33910 event pairs, 634 based on Foata normal form. 9/5841 useless extension candidates. Maximal degree in co-relation 69673. Up to 5348 conditions per place. [2024-06-28 04:27:40,824 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 619 selfloop transitions, 101 changer transitions 0/724 dead transitions. [2024-06-28 04:27:40,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 724 transitions, 14721 flow [2024-06-28 04:27:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:27:40,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-28 04:27:40,825 INFO L175 Difference]: Start difference. First operand has 484 places, 700 transitions, 13095 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:27:40,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 724 transitions, 14721 flow [2024-06-28 04:27:45,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 724 transitions, 14571 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:45,161 INFO L231 Difference]: Finished difference. Result has 487 places, 700 transitions, 13160 flow [2024-06-28 04:27:45,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12945, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13160, PETRI_PLACES=487, PETRI_TRANSITIONS=700} [2024-06-28 04:27:45,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-28 04:27:45,162 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 700 transitions, 13160 flow [2024-06-28 04:27:45,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:45,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:45,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:45,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 04:27:45,163 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:45,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:45,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1989272945, now seen corresponding path program 1 times [2024-06-28 04:27:45,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:45,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912310721] [2024-06-28 04:27:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:45,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:48,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:48,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912310721] [2024-06-28 04:27:48,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912310721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:48,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:48,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:27:48,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166450696] [2024-06-28 04:27:48,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:48,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:27:48,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:48,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:27:48,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:27:48,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:27:48,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 700 transitions, 13160 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:48,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:48,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:27:48,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:51,483 INFO L124 PetriNetUnfolderBase]: 3776/5851 cut-off events. [2024-06-28 04:27:51,484 INFO L125 PetriNetUnfolderBase]: For 983616/983625 co-relation queries the response was YES. [2024-06-28 04:27:51,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70296 conditions, 5851 events. 3776/5851 cut-off events. For 983616/983625 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 34029 event pairs, 621 based on Foata normal form. 3/5849 useless extension candidates. Maximal degree in co-relation 70069. Up to 5270 conditions per place. [2024-06-28 04:27:51,596 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 545 selfloop transitions, 178 changer transitions 0/727 dead transitions. [2024-06-28 04:27:51,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 727 transitions, 14900 flow [2024-06-28 04:27:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:27:51,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-28 04:27:51,597 INFO L175 Difference]: Start difference. First operand has 487 places, 700 transitions, 13160 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:27:51,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 727 transitions, 14900 flow [2024-06-28 04:27:56,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 727 transitions, 14676 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 04:27:56,634 INFO L231 Difference]: Finished difference. Result has 489 places, 703 transitions, 13508 flow [2024-06-28 04:27:56,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12936, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13508, PETRI_PLACES=489, PETRI_TRANSITIONS=703} [2024-06-28 04:27:56,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-28 04:27:56,634 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 703 transitions, 13508 flow [2024-06-28 04:27:56,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:56,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:56,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:56,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 04:27:56,635 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:56,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:56,635 INFO L85 PathProgramCache]: Analyzing trace with hash 506366425, now seen corresponding path program 2 times [2024-06-28 04:27:56,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:56,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907848900] [2024-06-28 04:27:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:56,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:01,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:01,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907848900] [2024-06-28 04:28:01,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907848900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:01,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:01,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:28:01,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112299417] [2024-06-28 04:28:01,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:01,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:28:01,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:01,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:28:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:28:01,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:28:01,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 703 transitions, 13508 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:01,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:01,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:28:01,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:03,699 INFO L124 PetriNetUnfolderBase]: 3770/5847 cut-off events. [2024-06-28 04:28:03,699 INFO L125 PetriNetUnfolderBase]: For 993083/993092 co-relation queries the response was YES. [2024-06-28 04:28:03,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70661 conditions, 5847 events. 3770/5847 cut-off events. For 993083/993092 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 34025 event pairs, 597 based on Foata normal form. 3/5845 useless extension candidates. Maximal degree in co-relation 70433. Up to 5305 conditions per place. [2024-06-28 04:28:03,804 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 575 selfloop transitions, 147 changer transitions 0/726 dead transitions. [2024-06-28 04:28:03,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 726 transitions, 15091 flow [2024-06-28 04:28:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 04:28:03,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:28:03,806 INFO L175 Difference]: Start difference. First operand has 489 places, 703 transitions, 13508 flow. Second operand 9 states and 144 transitions. [2024-06-28 04:28:03,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 726 transitions, 15091 flow [2024-06-28 04:28:08,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 726 transitions, 14631 flow, removed 131 selfloop flow, removed 6 redundant places. [2024-06-28 04:28:08,743 INFO L231 Difference]: Finished difference. Result has 492 places, 703 transitions, 13359 flow [2024-06-28 04:28:08,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13049, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13359, PETRI_PLACES=492, PETRI_TRANSITIONS=703} [2024-06-28 04:28:08,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-28 04:28:08,744 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 703 transitions, 13359 flow [2024-06-28 04:28:08,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:08,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:08,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:08,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 04:28:08,744 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:08,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:08,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1204733753, now seen corresponding path program 3 times [2024-06-28 04:28:08,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:08,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042720585] [2024-06-28 04:28:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:08,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:14,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:14,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042720585] [2024-06-28 04:28:14,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042720585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:14,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:14,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:28:14,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378633123] [2024-06-28 04:28:14,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:14,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:28:14,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:14,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:28:14,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:28:14,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:28:14,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 703 transitions, 13359 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:14,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:14,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:28:14,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:17,276 INFO L124 PetriNetUnfolderBase]: 3798/5887 cut-off events. [2024-06-28 04:28:17,276 INFO L125 PetriNetUnfolderBase]: For 1036929/1036938 co-relation queries the response was YES. [2024-06-28 04:28:17,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71027 conditions, 5887 events. 3798/5887 cut-off events. For 1036929/1036938 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 34275 event pairs, 638 based on Foata normal form. 9/5891 useless extension candidates. Maximal degree in co-relation 70799. Up to 5369 conditions per place. [2024-06-28 04:28:17,385 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 612 selfloop transitions, 108 changer transitions 0/724 dead transitions. [2024-06-28 04:28:17,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 724 transitions, 15023 flow [2024-06-28 04:28:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 04:28:17,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-28 04:28:17,387 INFO L175 Difference]: Start difference. First operand has 492 places, 703 transitions, 13359 flow. Second operand 8 states and 129 transitions. [2024-06-28 04:28:17,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 724 transitions, 15023 flow [2024-06-28 04:28:21,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 724 transitions, 14690 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-28 04:28:21,656 INFO L231 Difference]: Finished difference. Result has 491 places, 704 transitions, 13306 flow [2024-06-28 04:28:21,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13028, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13306, PETRI_PLACES=491, PETRI_TRANSITIONS=704} [2024-06-28 04:28:21,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-28 04:28:21,656 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 704 transitions, 13306 flow [2024-06-28 04:28:21,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:21,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:21,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:21,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 04:28:21,659 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:21,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash -562184547, now seen corresponding path program 4 times [2024-06-28 04:28:21,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:21,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054135921] [2024-06-28 04:28:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:21,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:25,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:25,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054135921] [2024-06-28 04:28:25,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054135921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:25,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:25,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:28:25,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618048582] [2024-06-28 04:28:25,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:25,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:28:25,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:25,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:28:25,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:28:25,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:28:25,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 704 transitions, 13306 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:25,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:25,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:28:25,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:27,837 INFO L124 PetriNetUnfolderBase]: 3872/6013 cut-off events. [2024-06-28 04:28:27,837 INFO L125 PetriNetUnfolderBase]: For 1092726/1092741 co-relation queries the response was YES. [2024-06-28 04:28:27,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73462 conditions, 6013 events. 3872/6013 cut-off events. For 1092726/1092741 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 35255 event pairs, 641 based on Foata normal form. 20/6029 useless extension candidates. Maximal degree in co-relation 73233. Up to 5403 conditions per place. [2024-06-28 04:28:27,955 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 669 selfloop transitions, 72 changer transitions 0/745 dead transitions. [2024-06-28 04:28:27,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 745 transitions, 15470 flow [2024-06-28 04:28:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:28:27,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-28 04:28:27,960 INFO L175 Difference]: Start difference. First operand has 491 places, 704 transitions, 13306 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:28:27,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 745 transitions, 15470 flow [2024-06-28 04:28:33,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 745 transitions, 15226 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 04:28:33,238 INFO L231 Difference]: Finished difference. Result has 494 places, 706 transitions, 13308 flow [2024-06-28 04:28:33,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13062, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13308, PETRI_PLACES=494, PETRI_TRANSITIONS=706} [2024-06-28 04:28:33,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-28 04:28:33,239 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 706 transitions, 13308 flow [2024-06-28 04:28:33,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:33,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:33,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:33,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 04:28:33,242 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:33,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:33,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1551827561, now seen corresponding path program 5 times [2024-06-28 04:28:33,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:33,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888222968] [2024-06-28 04:28:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:33,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:36,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:36,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888222968] [2024-06-28 04:28:36,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888222968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:36,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:36,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:28:36,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937299960] [2024-06-28 04:28:36,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:36,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:28:36,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:36,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:28:36,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:28:36,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:28:36,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 706 transitions, 13308 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:36,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:36,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:28:36,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:39,300 INFO L124 PetriNetUnfolderBase]: 3900/6057 cut-off events. [2024-06-28 04:28:39,301 INFO L125 PetriNetUnfolderBase]: For 1112323/1112338 co-relation queries the response was YES. [2024-06-28 04:28:39,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74163 conditions, 6057 events. 3900/6057 cut-off events. For 1112323/1112338 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 35623 event pairs, 653 based on Foata normal form. 20/6073 useless extension candidates. Maximal degree in co-relation 73933. Up to 5437 conditions per place. [2024-06-28 04:28:39,422 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 695 selfloop transitions, 46 changer transitions 0/745 dead transitions. [2024-06-28 04:28:39,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 745 transitions, 15194 flow [2024-06-28 04:28:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-28 04:28:39,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-28 04:28:39,424 INFO L175 Difference]: Start difference. First operand has 494 places, 706 transitions, 13308 flow. Second operand 9 states and 146 transitions. [2024-06-28 04:28:39,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 745 transitions, 15194 flow [2024-06-28 04:28:44,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 745 transitions, 15085 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 04:28:44,975 INFO L231 Difference]: Finished difference. Result has 499 places, 707 transitions, 13348 flow [2024-06-28 04:28:44,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13199, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13348, PETRI_PLACES=499, PETRI_TRANSITIONS=707} [2024-06-28 04:28:44,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-28 04:28:44,976 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 707 transitions, 13348 flow [2024-06-28 04:28:44,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:44,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:44,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:44,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 04:28:44,976 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:44,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:44,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1007733711, now seen corresponding path program 3 times [2024-06-28 04:28:44,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:44,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190509353] [2024-06-28 04:28:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:44,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:48,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:48,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190509353] [2024-06-28 04:28:48,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190509353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:48,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:48,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:28:48,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022354166] [2024-06-28 04:28:48,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:48,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:28:48,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:48,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:28:48,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:28:48,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:28:48,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 707 transitions, 13348 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:48,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:48,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:28:48,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:51,430 INFO L124 PetriNetUnfolderBase]: 3894/6049 cut-off events. [2024-06-28 04:28:51,430 INFO L125 PetriNetUnfolderBase]: For 1071354/1071369 co-relation queries the response was YES. [2024-06-28 04:28:51,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73863 conditions, 6049 events. 3894/6049 cut-off events. For 1071354/1071369 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 35617 event pairs, 668 based on Foata normal form. 14/6059 useless extension candidates. Maximal degree in co-relation 73631. Up to 5779 conditions per place. [2024-06-28 04:28:51,554 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 694 selfloop transitions, 36 changer transitions 0/734 dead transitions. [2024-06-28 04:28:51,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 734 transitions, 14896 flow [2024-06-28 04:28:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-28 04:28:51,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-28 04:28:51,556 INFO L175 Difference]: Start difference. First operand has 499 places, 707 transitions, 13348 flow. Second operand 9 states and 137 transitions. [2024-06-28 04:28:51,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 734 transitions, 14896 flow [2024-06-28 04:28:56,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 734 transitions, 14697 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-28 04:28:56,626 INFO L231 Difference]: Finished difference. Result has 503 places, 707 transitions, 13227 flow [2024-06-28 04:28:56,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13149, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13227, PETRI_PLACES=503, PETRI_TRANSITIONS=707} [2024-06-28 04:28:56,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-28 04:28:56,627 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 707 transitions, 13227 flow [2024-06-28 04:28:56,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:56,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:56,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:56,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 04:28:56,628 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:56,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1718121915, now seen corresponding path program 4 times [2024-06-28 04:28:56,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:56,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405010783] [2024-06-28 04:28:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:56,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:00,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:00,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405010783] [2024-06-28 04:29:00,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405010783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:00,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:00,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 04:29:00,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245941268] [2024-06-28 04:29:00,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:00,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 04:29:00,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:00,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 04:29:00,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-28 04:29:00,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:29:00,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 707 transitions, 13227 flow. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:00,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:00,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:29:00,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:02,930 INFO L124 PetriNetUnfolderBase]: 3943/6134 cut-off events. [2024-06-28 04:29:02,930 INFO L125 PetriNetUnfolderBase]: For 1102789/1102804 co-relation queries the response was YES. [2024-06-28 04:29:03,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74909 conditions, 6134 events. 3943/6134 cut-off events. For 1102789/1102804 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 36269 event pairs, 666 based on Foata normal form. 14/6144 useless extension candidates. Maximal degree in co-relation 74676. Up to 5766 conditions per place. [2024-06-28 04:29:03,054 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 687 selfloop transitions, 61 changer transitions 0/752 dead transitions. [2024-06-28 04:29:03,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 752 transitions, 15550 flow [2024-06-28 04:29:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 04:29:03,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-28 04:29:03,055 INFO L175 Difference]: Start difference. First operand has 503 places, 707 transitions, 13227 flow. Second operand 9 states and 147 transitions. [2024-06-28 04:29:03,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 752 transitions, 15550 flow [2024-06-28 04:29:07,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 752 transitions, 15367 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-28 04:29:07,995 INFO L231 Difference]: Finished difference. Result has 503 places, 721 transitions, 13675 flow [2024-06-28 04:29:07,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13044, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13675, PETRI_PLACES=503, PETRI_TRANSITIONS=721} [2024-06-28 04:29:07,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-28 04:29:07,996 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 721 transitions, 13675 flow [2024-06-28 04:29:07,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:07,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:07,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:07,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 04:29:07,997 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:29:07,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:07,998 INFO L85 PathProgramCache]: Analyzing trace with hash -562124097, now seen corresponding path program 6 times [2024-06-28 04:29:07,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:07,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837670490] [2024-06-28 04:29:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:07,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:11,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:11,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837670490] [2024-06-28 04:29:11,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837670490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:11,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:11,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:29:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675772911] [2024-06-28 04:29:11,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:11,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:29:11,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:29:11,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:29:11,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:29:11,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 721 transitions, 13675 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:11,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:11,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:29:11,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:14,055 INFO L124 PetriNetUnfolderBase]: 3971/6168 cut-off events. [2024-06-28 04:29:14,055 INFO L125 PetriNetUnfolderBase]: For 1174917/1174926 co-relation queries the response was YES. [2024-06-28 04:29:14,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76199 conditions, 6168 events. 3971/6168 cut-off events. For 1174917/1174926 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 36439 event pairs, 681 based on Foata normal form. 9/6172 useless extension candidates. Maximal degree in co-relation 75965. Up to 5550 conditions per place. [2024-06-28 04:29:14,168 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 610 selfloop transitions, 137 changer transitions 0/751 dead transitions. [2024-06-28 04:29:14,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 751 transitions, 15417 flow [2024-06-28 04:29:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-28 04:29:14,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-28 04:29:14,170 INFO L175 Difference]: Start difference. First operand has 503 places, 721 transitions, 13675 flow. Second operand 9 states and 146 transitions. [2024-06-28 04:29:14,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 751 transitions, 15417 flow [2024-06-28 04:29:19,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 751 transitions, 15128 flow, removed 129 selfloop flow, removed 3 redundant places. [2024-06-28 04:29:19,777 INFO L231 Difference]: Finished difference. Result has 509 places, 722 transitions, 13711 flow [2024-06-28 04:29:19,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13386, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13711, PETRI_PLACES=509, PETRI_TRANSITIONS=722} [2024-06-28 04:29:19,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-28 04:29:19,778 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 722 transitions, 13711 flow [2024-06-28 04:29:19,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:19,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:19,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:19,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 04:29:19,779 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:29:19,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash -555928437, now seen corresponding path program 7 times [2024-06-28 04:29:19,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:19,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849331280] [2024-06-28 04:29:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:19,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:22,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:22,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849331280] [2024-06-28 04:29:22,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849331280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:22,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:22,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:29:22,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615925971] [2024-06-28 04:29:22,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:22,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:29:22,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:22,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:29:22,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:29:23,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:29:23,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 722 transitions, 13711 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:23,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:23,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:29:23,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:25,704 INFO L124 PetriNetUnfolderBase]: 4070/6325 cut-off events. [2024-06-28 04:29:25,704 INFO L125 PetriNetUnfolderBase]: For 1280970/1280979 co-relation queries the response was YES. [2024-06-28 04:29:25,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80428 conditions, 6325 events. 4070/6325 cut-off events. For 1280970/1280979 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 37358 event pairs, 631 based on Foata normal form. 7/6327 useless extension candidates. Maximal degree in co-relation 80192. Up to 4596 conditions per place. [2024-06-28 04:29:25,825 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 616 selfloop transitions, 146 changer transitions 0/766 dead transitions. [2024-06-28 04:29:25,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 766 transitions, 16257 flow [2024-06-28 04:29:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 04:29:25,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-28 04:29:25,826 INFO L175 Difference]: Start difference. First operand has 509 places, 722 transitions, 13711 flow. Second operand 9 states and 157 transitions. [2024-06-28 04:29:25,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 766 transitions, 16257 flow [2024-06-28 04:29:31,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 766 transitions, 15922 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 04:29:31,542 INFO L231 Difference]: Finished difference. Result has 510 places, 725 transitions, 13830 flow [2024-06-28 04:29:31,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13376, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13830, PETRI_PLACES=510, PETRI_TRANSITIONS=725} [2024-06-28 04:29:31,542 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-28 04:29:31,543 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 725 transitions, 13830 flow [2024-06-28 04:29:31,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:31,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:31,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:31,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 04:29:31,543 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:29:31,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:31,544 INFO L85 PathProgramCache]: Analyzing trace with hash 13491158, now seen corresponding path program 1 times [2024-06-28 04:29:31,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:31,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589663234] [2024-06-28 04:29:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:31,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:34,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:34,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589663234] [2024-06-28 04:29:34,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589663234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:34,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:34,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:29:34,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678413787] [2024-06-28 04:29:34,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:34,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:29:34,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:29:34,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:29:34,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:29:34,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 725 transitions, 13830 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:34,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:34,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:29:34,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:37,398 INFO L124 PetriNetUnfolderBase]: 4201/6532 cut-off events. [2024-06-28 04:29:37,399 INFO L125 PetriNetUnfolderBase]: For 1405975/1405990 co-relation queries the response was YES. [2024-06-28 04:29:37,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84441 conditions, 6532 events. 4201/6532 cut-off events. For 1405975/1405990 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 38997 event pairs, 671 based on Foata normal form. 20/6548 useless extension candidates. Maximal degree in co-relation 84204. Up to 5612 conditions per place. [2024-06-28 04:29:37,526 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 647 selfloop transitions, 127 changer transitions 0/778 dead transitions. [2024-06-28 04:29:37,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 778 transitions, 16225 flow [2024-06-28 04:29:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:29:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:29:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-28 04:29:37,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-28 04:29:37,528 INFO L175 Difference]: Start difference. First operand has 510 places, 725 transitions, 13830 flow. Second operand 10 states and 168 transitions. [2024-06-28 04:29:37,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 778 transitions, 16225 flow [2024-06-28 04:29:44,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 778 transitions, 16027 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 04:29:44,245 INFO L231 Difference]: Finished difference. Result has 518 places, 733 transitions, 14142 flow [2024-06-28 04:29:44,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13632, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14142, PETRI_PLACES=518, PETRI_TRANSITIONS=733} [2024-06-28 04:29:44,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-28 04:29:44,246 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 733 transitions, 14142 flow [2024-06-28 04:29:44,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:44,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:44,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:44,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 04:29:44,247 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:29:44,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash 13490817, now seen corresponding path program 8 times [2024-06-28 04:29:44,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:44,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462584991] [2024-06-28 04:29:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:44,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:47,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:47,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462584991] [2024-06-28 04:29:47,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462584991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:47,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:47,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:29:47,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854146135] [2024-06-28 04:29:47,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:47,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:29:47,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:47,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:29:47,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:29:47,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 04:29:47,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 733 transitions, 14142 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:47,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:47,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 04:29:47,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15