./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 04:24:00,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:24:00,818 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:24:00,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:24:00,823 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:24:00,848 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:24:00,849 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:24:00,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:24:00,849 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:24:00,853 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:24:00,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:24:00,853 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:24:00,854 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:24:00,855 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:24:00,855 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:24:00,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:24:00,856 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:24:00,856 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:24:00,856 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:24:00,856 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:24:00,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:24:00,857 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:24:00,857 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:24:00,857 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:24:00,858 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:24:00,858 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:24:00,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:24:00,858 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:24:00,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:24:00,859 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:24:00,860 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:24:00,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:24:00,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:24:00,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:24:00,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:24:00,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:24:00,861 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:24:00,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:24:00,861 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:24:00,861 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:24:00,862 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:24:00,862 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:24:00,862 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:24:00,862 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:24:01,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:24:01,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:24:01,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:24:01,049 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:24:01,049 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:24:01,050 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_rmo.yml/witness.yml [2024-06-28 04:24:01,300 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:24:01,300 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:24:01,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-28 04:24:02,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:24:02,615 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:24:02,615 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-28 04:24:02,626 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c013d15f7/f7c5709ce53b4d81bbb38af31643b1e6/FLAG4818a28f6 [2024-06-28 04:24:02,637 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c013d15f7/f7c5709ce53b4d81bbb38af31643b1e6 [2024-06-28 04:24:02,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:24:02,647 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:24:02,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:24:02,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:24:02,655 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:24:02,664 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:24:01" (1/2) ... [2024-06-28 04:24:02,665 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bcddf64 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:24:02, skipping insertion in model container [2024-06-28 04:24:02,666 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:24:01" (1/2) ... [2024-06-28 04:24:02,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@23bf67fe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:24:02, skipping insertion in model container [2024-06-28 04:24:02,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:24:02" (2/2) ... [2024-06-28 04:24:02,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bcddf64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:02, skipping insertion in model container [2024-06-28 04:24:02,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:24:02" (2/2) ... [2024-06-28 04:24:02,668 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:24:02,789 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:24:02,790 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__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) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 04:24:02,790 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 04:24:02,790 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__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) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 04:24:02,791 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:24:02,791 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-28 04:24:02,826 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:24:03,142 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:24:03,150 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:24:03,286 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:24:03,321 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:24:03,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03 WrapperNode [2024-06-28 04:24:03,322 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:24:03,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:24:03,323 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:24:03,323 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:24:03,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,358 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,410 INFO L138 Inliner]: procedures = 175, calls = 109, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 279 [2024-06-28 04:24:03,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:24:03,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:24:03,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:24:03,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:24:03,419 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,424 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,438 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [64, 2]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [1, 2]. The 11 writes are split as follows [11, 0]. [2024-06-28 04:24:03,439 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,439 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,451 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,453 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,455 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,457 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,461 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:24:03,461 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:24:03,461 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:24:03,461 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:24:03,462 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (1/1) ... [2024-06-28 04:24:03,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:24:03,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:24:03,504 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 04:24:03,509 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 04:24:03,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 04:24:03,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 04:24:03,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 04:24:03,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 04:24:03,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:24:03,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:24:03,539 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:24:03,539 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:24:03,539 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:24:03,539 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:24:03,539 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:24:03,540 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:24:03,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:24:03,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 04:24:03,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:24:03,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:24:03,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:24:03,541 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 04:24:03,655 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:24:03,657 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:24:04,172 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:24:04,173 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:24:04,603 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:24:04,604 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:24:04,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:24:04 BoogieIcfgContainer [2024-06-28 04:24:04,604 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:24:04,606 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:24:04,606 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:24:04,609 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:24:04,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:24:01" (1/4) ... [2024-06-28 04:24:04,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2992e6e3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:24:04, skipping insertion in model container [2024-06-28 04:24:04,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:24:02" (2/4) ... [2024-06-28 04:24:04,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2992e6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:24:04, skipping insertion in model container [2024-06-28 04:24:04,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:24:03" (3/4) ... [2024-06-28 04:24:04,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2992e6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:24:04, skipping insertion in model container [2024-06-28 04:24:04,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:24:04" (4/4) ... [2024-06-28 04:24:04,611 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_rmo.i [2024-06-28 04:24:04,626 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:24:04,626 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 04:24:04,626 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:24:04,678 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:24:04,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 04:24:04,798 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-28 04:24:04,798 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:24:04,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 04:24:04,822 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 04:24:04,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-28 04:24:04,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:24:04,868 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;@215c9421, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:24:04,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 04:24:04,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:24:04,874 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 04:24:04,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:24:04,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:04,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:24:04,876 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 04:24:04,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:04,882 INFO L85 PathProgramCache]: Analyzing trace with hash 908377400, now seen corresponding path program 1 times [2024-06-28 04:24:04,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:04,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423151676] [2024-06-28 04:24:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:04,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:06,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:06,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423151676] [2024-06-28 04:24:06,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423151676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:06,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:06,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:24:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102758656] [2024-06-28 04:24:06,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:06,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:24:06,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:06,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:24:06,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:24:06,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 04:24:06,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:06,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:06,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 04:24:06,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:07,341 INFO L124 PetriNetUnfolderBase]: 1205/1912 cut-off events. [2024-06-28 04:24:07,342 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 04:24:07,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 1912 events. 1205/1912 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9481 event pairs, 800 based on Foata normal form. 1/1879 useless extension candidates. Maximal degree in co-relation 3805. Up to 1818 conditions per place. [2024-06-28 04:24:07,356 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-28 04:24:07,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-28 04:24:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:24:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:24:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-28 04:24:07,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-28 04:24:07,367 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-28 04:24:07,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-28 04:24:07,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:07,373 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-28 04:24:07,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-28 04:24:07,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-28 04:24:07,377 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-28 04:24:07,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:07,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:07,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:07,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:24:07,378 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 04:24:07,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:07,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1072501965, now seen corresponding path program 1 times [2024-06-28 04:24:07,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:07,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493203077] [2024-06-28 04:24:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:07,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:08,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:08,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493203077] [2024-06-28 04:24:08,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493203077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:08,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:08,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 04:24:08,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320654463] [2024-06-28 04:24:08,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:08,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 04:24:08,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:08,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 04:24:08,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 04:24:08,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:08,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:08,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:08,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:08,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:09,375 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-28 04:24:09,375 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-28 04:24:09,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2131 events. 1400/2131 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10147 event pairs, 654 based on Foata normal form. 6/2137 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-28 04:24:09,387 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-28 04:24:09,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-28 04:24:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:24:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:24:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-28 04:24:09,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-28 04:24:09,391 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-28 04:24:09,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-28 04:24:09,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:24:09,394 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-28 04:24:09,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-28 04:24:09,396 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-28 04:24:09,396 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-28 04:24:09,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:09,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:09,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:09,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:24:09,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:09,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:09,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1462792501, now seen corresponding path program 1 times [2024-06-28 04:24:09,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:09,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19465208] [2024-06-28 04:24:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:09,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:12,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:12,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19465208] [2024-06-28 04:24:12,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19465208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:12,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:12,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:24:12,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632523503] [2024-06-28 04:24:12,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:12,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:24:12,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:12,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:24:12,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:24:12,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:12,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:12,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:12,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:12,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:13,020 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-28 04:24:13,021 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-28 04:24:13,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 2116 events. 1391/2116 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10112 event pairs, 485 based on Foata normal form. 6/2122 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-28 04:24:13,030 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-28 04:24:13,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-28 04:24:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-28 04:24:13,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-28 04:24:13,032 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-28 04:24:13,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-28 04:24:13,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 04:24:13,034 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-28 04:24:13,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-28 04:24:13,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-28 04:24:13,035 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-28 04:24:13,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:13,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:13,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:13,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:24:13,036 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 04:24:13,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:13,036 INFO L85 PathProgramCache]: Analyzing trace with hash 609917060, now seen corresponding path program 1 times [2024-06-28 04:24:13,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:13,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936170146] [2024-06-28 04:24:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:13,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:14,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:14,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936170146] [2024-06-28 04:24:14,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936170146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:14,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:14,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:24:14,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969751826] [2024-06-28 04:24:14,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:14,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:24:14,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:14,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:24:14,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:24:14,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:14,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:14,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:14,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:14,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:15,309 INFO L124 PetriNetUnfolderBase]: 1179/1896 cut-off events. [2024-06-28 04:24:15,309 INFO L125 PetriNetUnfolderBase]: For 1832/1832 co-relation queries the response was YES. [2024-06-28 04:24:15,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5196 conditions, 1896 events. 1179/1896 cut-off events. For 1832/1832 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9398 event pairs, 473 based on Foata normal form. 2/1898 useless extension candidates. Maximal degree in co-relation 5179. Up to 1739 conditions per place. [2024-06-28 04:24:15,321 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-28 04:24:15,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 385 flow [2024-06-28 04:24:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:24:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:24:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-28 04:24:15,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-28 04:24:15,324 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 98 transitions. [2024-06-28 04:24:15,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 385 flow [2024-06-28 04:24:15,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:15,329 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 230 flow [2024-06-28 04:24:15,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-28 04:24:15,330 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-28 04:24:15,330 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 230 flow [2024-06-28 04:24:15,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:15,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:15,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:15,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:24:15,332 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 04:24:15,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1728306536, now seen corresponding path program 1 times [2024-06-28 04:24:15,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:15,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167727107] [2024-06-28 04:24:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:15,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:16,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:16,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167727107] [2024-06-28 04:24:16,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167727107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:16,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:16,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:24:16,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030649442] [2024-06-28 04:24:16,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:16,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:24:16,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:16,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:24:16,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:24:16,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:16,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:16,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:16,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:16,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:17,501 INFO L124 PetriNetUnfolderBase]: 1169/1881 cut-off events. [2024-06-28 04:24:17,501 INFO L125 PetriNetUnfolderBase]: For 2845/2847 co-relation queries the response was YES. [2024-06-28 04:24:17,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5676 conditions, 1881 events. 1169/1881 cut-off events. For 2845/2847 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9321 event pairs, 467 based on Foata normal form. 6/1887 useless extension candidates. Maximal degree in co-relation 5656. Up to 1731 conditions per place. [2024-06-28 04:24:17,511 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-28 04:24:17,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 384 flow [2024-06-28 04:24:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:24:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:24:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-28 04:24:17,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-28 04:24:17,516 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 230 flow. Second operand 5 states and 96 transitions. [2024-06-28 04:24:17,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 384 flow [2024-06-28 04:24:17,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 370 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-28 04:24:17,520 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 244 flow [2024-06-28 04:24:17,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-06-28 04:24:17,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-28 04:24:17,522 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 244 flow [2024-06-28 04:24:17,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:17,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:17,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:17,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:24:17,523 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 04:24:17,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash -417770929, now seen corresponding path program 1 times [2024-06-28 04:24:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:17,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565452443] [2024-06-28 04:24:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:17,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:19,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:19,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565452443] [2024-06-28 04:24:19,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565452443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:19,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:19,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:24:19,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113493985] [2024-06-28 04:24:19,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:19,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:24:19,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:19,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:24:19,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:24:19,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:19,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 244 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 04:24:19,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:19,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:19,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:20,314 INFO L124 PetriNetUnfolderBase]: 1389/2123 cut-off events. [2024-06-28 04:24:20,315 INFO L125 PetriNetUnfolderBase]: For 4413/4415 co-relation queries the response was YES. [2024-06-28 04:24:20,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6770 conditions, 2123 events. 1389/2123 cut-off events. For 4413/4415 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10145 event pairs, 523 based on Foata normal form. 4/2127 useless extension candidates. Maximal degree in co-relation 6747. Up to 1956 conditions per place. [2024-06-28 04:24:20,326 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2024-06-28 04:24:20,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 526 flow [2024-06-28 04:24:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:20,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-28 04:24:20,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-28 04:24:20,327 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 244 flow. Second operand 6 states and 118 transitions. [2024-06-28 04:24:20,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 526 flow [2024-06-28 04:24:20,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 512 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 04:24:20,331 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 328 flow [2024-06-28 04:24:20,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=328, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-06-28 04:24:20,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-28 04:24:20,332 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 328 flow [2024-06-28 04:24:20,332 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 04:24:20,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:20,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:20,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:24:20,333 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 04:24:20,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:20,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2037138517, now seen corresponding path program 2 times [2024-06-28 04:24:20,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:20,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386250104] [2024-06-28 04:24:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:20,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:21,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:21,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386250104] [2024-06-28 04:24:21,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386250104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:21,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:21,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:24:21,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962327328] [2024-06-28 04:24:21,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:21,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:24:21,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:21,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:24:21,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:24:21,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:21,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 328 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 04:24:21,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:21,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:21,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:22,925 INFO L124 PetriNetUnfolderBase]: 1384/2110 cut-off events. [2024-06-28 04:24:22,926 INFO L125 PetriNetUnfolderBase]: For 6481/6483 co-relation queries the response was YES. [2024-06-28 04:24:22,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7418 conditions, 2110 events. 1384/2110 cut-off events. For 6481/6483 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10080 event pairs, 537 based on Foata normal form. 4/2113 useless extension candidates. Maximal degree in co-relation 7392. Up to 1953 conditions per place. [2024-06-28 04:24:22,942 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-06-28 04:24:22,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 582 flow [2024-06-28 04:24:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-28 04:24:22,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-28 04:24:22,944 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 328 flow. Second operand 6 states and 112 transitions. [2024-06-28 04:24:22,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 582 flow [2024-06-28 04:24:22,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 552 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 04:24:22,954 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 376 flow [2024-06-28 04:24:22,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-06-28 04:24:22,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-28 04:24:22,955 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 376 flow [2024-06-28 04:24:22,955 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 04:24:22,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:22,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:22,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:24:22,955 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 04:24:22,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:22,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2002202393, now seen corresponding path program 1 times [2024-06-28 04:24:22,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:22,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102907025] [2024-06-28 04:24:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:22,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:24,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:24,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102907025] [2024-06-28 04:24:24,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102907025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:24,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:24,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:24:24,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916928831] [2024-06-28 04:24:24,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:24,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:24:24,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:24,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:24:24,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:24:24,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:24,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 04:24:24,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:24,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:24,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:25,344 INFO L124 PetriNetUnfolderBase]: 1471/2249 cut-off events. [2024-06-28 04:24:25,345 INFO L125 PetriNetUnfolderBase]: For 8405/8409 co-relation queries the response was YES. [2024-06-28 04:24:25,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8340 conditions, 2249 events. 1471/2249 cut-off events. For 8405/8409 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10789 event pairs, 524 based on Foata normal form. 8/2257 useless extension candidates. Maximal degree in co-relation 8312. Up to 2020 conditions per place. [2024-06-28 04:24:25,356 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 34 changer transitions 0/111 dead transitions. [2024-06-28 04:24:25,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 111 transitions, 862 flow [2024-06-28 04:24:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-28 04:24:25,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-28 04:24:25,358 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 376 flow. Second operand 7 states and 141 transitions. [2024-06-28 04:24:25,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 111 transitions, 862 flow [2024-06-28 04:24:25,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 798 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:25,364 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 562 flow [2024-06-28 04:24:25,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-28 04:24:25,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-28 04:24:25,365 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 562 flow [2024-06-28 04:24:25,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 04:24:25,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:25,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:25,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:24:25,366 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:25,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:25,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1310659913, now seen corresponding path program 2 times [2024-06-28 04:24:25,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:25,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187962193] [2024-06-28 04:24:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:25,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:26,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:26,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187962193] [2024-06-28 04:24:26,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187962193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:26,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:26,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:24:26,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564104589] [2024-06-28 04:24:26,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:26,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:24:26,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:26,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:24:26,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:24:26,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:26,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 562 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 04:24:26,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:26,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:26,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:27,904 INFO L124 PetriNetUnfolderBase]: 1515/2327 cut-off events. [2024-06-28 04:24:27,904 INFO L125 PetriNetUnfolderBase]: For 10885/10891 co-relation queries the response was YES. [2024-06-28 04:24:27,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9059 conditions, 2327 events. 1515/2327 cut-off events. For 10885/10891 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11225 event pairs, 531 based on Foata normal form. 12/2339 useless extension candidates. Maximal degree in co-relation 9027. Up to 2058 conditions per place. [2024-06-28 04:24:27,915 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 64 selfloop transitions, 40 changer transitions 0/109 dead transitions. [2024-06-28 04:24:27,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 950 flow [2024-06-28 04:24:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-28 04:24:27,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-28 04:24:27,917 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 562 flow. Second operand 6 states and 119 transitions. [2024-06-28 04:24:27,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 950 flow [2024-06-28 04:24:27,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 900 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:27,925 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 679 flow [2024-06-28 04:24:27,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=679, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-28 04:24:27,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-28 04:24:27,926 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 679 flow [2024-06-28 04:24:27,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 04:24:27,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:27,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:27,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:24:27,926 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 04:24:27,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:27,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1258012633, now seen corresponding path program 3 times [2024-06-28 04:24:27,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:27,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958523734] [2024-06-28 04:24:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:27,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:29,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958523734] [2024-06-28 04:24:29,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958523734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:29,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:29,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:24:29,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764736637] [2024-06-28 04:24:29,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:29,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:24:29,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:24:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:24:29,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:29,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 679 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 04:24:29,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:29,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:29,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:30,407 INFO L124 PetriNetUnfolderBase]: 1499/2297 cut-off events. [2024-06-28 04:24:30,407 INFO L125 PetriNetUnfolderBase]: For 12907/12919 co-relation queries the response was YES. [2024-06-28 04:24:30,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9164 conditions, 2297 events. 1499/2297 cut-off events. For 12907/12919 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11069 event pairs, 536 based on Foata normal form. 18/2314 useless extension candidates. Maximal degree in co-relation 9131. Up to 2045 conditions per place. [2024-06-28 04:24:30,419 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 39 changer transitions 0/103 dead transitions. [2024-06-28 04:24:30,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 941 flow [2024-06-28 04:24:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-28 04:24:30,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-28 04:24:30,437 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 679 flow. Second operand 6 states and 111 transitions. [2024-06-28 04:24:30,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 941 flow [2024-06-28 04:24:30,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 866 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 04:24:30,471 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 693 flow [2024-06-28 04:24:30,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=693, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-28 04:24:30,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-28 04:24:30,472 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 693 flow [2024-06-28 04:24:30,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 04:24:30,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:30,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:30,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:24:30,473 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 04:24:30,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:30,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1272936653, now seen corresponding path program 1 times [2024-06-28 04:24:30,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:30,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805477509] [2024-06-28 04:24:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:30,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:33,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:33,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:33,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805477509] [2024-06-28 04:24:33,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805477509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:33,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:33,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:33,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219659580] [2024-06-28 04:24:33,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:33,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:33,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:33,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:33,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:33,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:33,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 693 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 04:24:33,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:33,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:33,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:33,899 INFO L124 PetriNetUnfolderBase]: 1284/2073 cut-off events. [2024-06-28 04:24:33,900 INFO L125 PetriNetUnfolderBase]: For 11226/11228 co-relation queries the response was YES. [2024-06-28 04:24:33,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8111 conditions, 2073 events. 1284/2073 cut-off events. For 11226/11228 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10356 event pairs, 435 based on Foata normal form. 6/2079 useless extension candidates. Maximal degree in co-relation 8078. Up to 1878 conditions per place. [2024-06-28 04:24:33,911 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 86 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2024-06-28 04:24:33,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 965 flow [2024-06-28 04:24:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-28 04:24:33,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-28 04:24:33,928 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 693 flow. Second operand 6 states and 113 transitions. [2024-06-28 04:24:33,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 965 flow [2024-06-28 04:24:33,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 796 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 04:24:33,939 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 577 flow [2024-06-28 04:24:33,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2024-06-28 04:24:33,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-28 04:24:33,939 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 577 flow [2024-06-28 04:24:33,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 04:24:33,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:33,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:33,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:24:33,940 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 04:24:33,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2050610994, now seen corresponding path program 1 times [2024-06-28 04:24:33,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:33,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299491613] [2024-06-28 04:24:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:33,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:36,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:36,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299491613] [2024-06-28 04:24:36,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299491613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:36,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:36,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:36,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926996926] [2024-06-28 04:24:36,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:36,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:36,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:36,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:36,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:36,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:36,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 577 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 04:24:36,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:36,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:36,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:37,799 INFO L124 PetriNetUnfolderBase]: 1540/2360 cut-off events. [2024-06-28 04:24:37,799 INFO L125 PetriNetUnfolderBase]: For 13321/13321 co-relation queries the response was YES. [2024-06-28 04:24:37,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9435 conditions, 2360 events. 1540/2360 cut-off events. For 13321/13321 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11366 event pairs, 521 based on Foata normal form. 2/2362 useless extension candidates. Maximal degree in co-relation 9403. Up to 2209 conditions per place. [2024-06-28 04:24:37,811 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 105 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-28 04:24:37,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 129 transitions, 1029 flow [2024-06-28 04:24:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:37,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:24:37,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-28 04:24:37,813 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 577 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:24:37,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 129 transitions, 1029 flow [2024-06-28 04:24:37,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 994 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 04:24:37,824 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 650 flow [2024-06-28 04:24:37,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=650, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2024-06-28 04:24:37,824 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-28 04:24:37,824 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 650 flow [2024-06-28 04:24:37,825 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 04:24:37,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:37,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:37,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:24:37,825 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 04:24:37,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:37,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1975756622, now seen corresponding path program 2 times [2024-06-28 04:24:37,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:37,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424591295] [2024-06-28 04:24:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:37,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:40,078 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 04:24:40,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:40,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424591295] [2024-06-28 04:24:40,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424591295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:40,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:40,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:40,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491054132] [2024-06-28 04:24:40,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:40,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:40,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:40,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:40,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:40,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:40,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 650 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 04:24:40,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:40,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:40,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:41,322 INFO L124 PetriNetUnfolderBase]: 1553/2396 cut-off events. [2024-06-28 04:24:41,323 INFO L125 PetriNetUnfolderBase]: For 16561/16565 co-relation queries the response was YES. [2024-06-28 04:24:41,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10168 conditions, 2396 events. 1553/2396 cut-off events. For 16561/16565 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11738 event pairs, 479 based on Foata normal form. 6/2402 useless extension candidates. Maximal degree in co-relation 10134. Up to 1935 conditions per place. [2024-06-28 04:24:41,334 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 45 changer transitions 0/129 dead transitions. [2024-06-28 04:24:41,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 1108 flow [2024-06-28 04:24:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 04:24:41,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-28 04:24:41,336 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 650 flow. Second operand 7 states and 136 transitions. [2024-06-28 04:24:41,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 1108 flow [2024-06-28 04:24:41,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 1049 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:41,349 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 791 flow [2024-06-28 04:24:41,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=791, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-06-28 04:24:41,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-28 04:24:41,349 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 791 flow [2024-06-28 04:24:41,350 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 04:24:41,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:41,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:41,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:24:41,350 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 04:24:41,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:41,350 INFO L85 PathProgramCache]: Analyzing trace with hash -343921582, now seen corresponding path program 3 times [2024-06-28 04:24:41,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:41,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388539522] [2024-06-28 04:24:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:41,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:43,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:43,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388539522] [2024-06-28 04:24:43,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388539522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:43,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:43,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:43,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061806165] [2024-06-28 04:24:43,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:43,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:43,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:43,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:43,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:43,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:43,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 791 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 04:24:43,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:43,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:43,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:44,731 INFO L124 PetriNetUnfolderBase]: 1548/2376 cut-off events. [2024-06-28 04:24:44,731 INFO L125 PetriNetUnfolderBase]: For 20211/20215 co-relation queries the response was YES. [2024-06-28 04:24:44,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10941 conditions, 2376 events. 1548/2376 cut-off events. For 20211/20215 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11611 event pairs, 536 based on Foata normal form. 6/2380 useless extension candidates. Maximal degree in co-relation 10906. Up to 1932 conditions per place. [2024-06-28 04:24:44,744 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 50 changer transitions 0/126 dead transitions. [2024-06-28 04:24:44,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1203 flow [2024-06-28 04:24:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:24:44,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-28 04:24:44,746 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 791 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:24:44,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1203 flow [2024-06-28 04:24:44,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1142 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:44,760 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 881 flow [2024-06-28 04:24:44,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=881, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-28 04:24:44,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-28 04:24:44,761 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 881 flow [2024-06-28 04:24:44,761 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 04:24:44,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:44,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:44,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:24:44,762 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:44,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1472760348, now seen corresponding path program 1 times [2024-06-28 04:24:44,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:44,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605726911] [2024-06-28 04:24:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:46,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:46,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605726911] [2024-06-28 04:24:46,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605726911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:46,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:46,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:24:46,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280140933] [2024-06-28 04:24:46,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:46,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:24:46,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:46,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:24:46,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:24:46,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:46,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 881 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:46,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:46,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:46,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:47,244 INFO L124 PetriNetUnfolderBase]: 1335/2170 cut-off events. [2024-06-28 04:24:47,244 INFO L125 PetriNetUnfolderBase]: For 18346/18346 co-relation queries the response was YES. [2024-06-28 04:24:47,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9862 conditions, 2170 events. 1335/2170 cut-off events. For 18346/18346 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 11037 event pairs, 443 based on Foata normal form. 2/2172 useless extension candidates. Maximal degree in co-relation 9825. Up to 2002 conditions per place. [2024-06-28 04:24:47,262 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 98 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-28 04:24:47,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 1141 flow [2024-06-28 04:24:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:24:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:24:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-28 04:24:47,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:24:47,263 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 881 flow. Second operand 5 states and 90 transitions. [2024-06-28 04:24:47,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 1141 flow [2024-06-28 04:24:47,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 112 transitions, 1055 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 04:24:47,274 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 841 flow [2024-06-28 04:24:47,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-06-28 04:24:47,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-28 04:24:47,275 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 841 flow [2024-06-28 04:24:47,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:47,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:47,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:47,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:24:47,276 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 04:24:47,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1924304768, now seen corresponding path program 1 times [2024-06-28 04:24:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:47,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424288838] [2024-06-28 04:24:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:47,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:49,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:49,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424288838] [2024-06-28 04:24:49,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424288838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:49,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:49,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:49,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570909741] [2024-06-28 04:24:49,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:49,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:49,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:49,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:49,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:49,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:49,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:49,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:50,625 INFO L124 PetriNetUnfolderBase]: 1529/2370 cut-off events. [2024-06-28 04:24:50,626 INFO L125 PetriNetUnfolderBase]: For 23316/23316 co-relation queries the response was YES. [2024-06-28 04:24:50,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11082 conditions, 2370 events. 1529/2370 cut-off events. For 23316/23316 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11640 event pairs, 520 based on Foata normal form. 4/2374 useless extension candidates. Maximal degree in co-relation 11043. Up to 2201 conditions per place. [2024-06-28 04:24:50,640 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 115 selfloop transitions, 19 changer transitions 0/139 dead transitions. [2024-06-28 04:24:50,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 1219 flow [2024-06-28 04:24:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:24:50,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-28 04:24:50,642 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 841 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:24:50,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 1219 flow [2024-06-28 04:24:50,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 139 transitions, 1185 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:50,656 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 853 flow [2024-06-28 04:24:50,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=853, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-06-28 04:24:50,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-28 04:24:50,657 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 853 flow [2024-06-28 04:24:50,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:50,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:50,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:50,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:24:50,658 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 04:24:50,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:50,658 INFO L85 PathProgramCache]: Analyzing trace with hash -514909950, now seen corresponding path program 2 times [2024-06-28 04:24:50,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:50,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924941108] [2024-06-28 04:24:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:50,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:52,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924941108] [2024-06-28 04:24:52,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924941108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:52,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:52,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:52,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668696065] [2024-06-28 04:24:52,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:52,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:52,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:52,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:52,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:52,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:52,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 853 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:52,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:52,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:52,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:54,057 INFO L124 PetriNetUnfolderBase]: 1591/2476 cut-off events. [2024-06-28 04:24:54,057 INFO L125 PetriNetUnfolderBase]: For 26930/26938 co-relation queries the response was YES. [2024-06-28 04:24:54,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 2476 events. 1591/2476 cut-off events. For 26930/26938 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12289 event pairs, 472 based on Foata normal form. 12/2488 useless extension candidates. Maximal degree in co-relation 11770. Up to 1964 conditions per place. [2024-06-28 04:24:54,070 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 84 selfloop transitions, 55 changer transitions 0/144 dead transitions. [2024-06-28 04:24:54,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 1425 flow [2024-06-28 04:24:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 04:24:54,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 04:24:54,072 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 853 flow. Second operand 7 states and 140 transitions. [2024-06-28 04:24:54,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 1425 flow [2024-06-28 04:24:54,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 144 transitions, 1387 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 04:24:54,086 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 1011 flow [2024-06-28 04:24:54,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1011, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-28 04:24:54,087 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-28 04:24:54,087 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 1011 flow [2024-06-28 04:24:54,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:54,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:54,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:54,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:24:54,087 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:54,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:54,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1776695168, now seen corresponding path program 3 times [2024-06-28 04:24:54,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:54,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563686091] [2024-06-28 04:24:54,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:54,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:56,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:56,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563686091] [2024-06-28 04:24:56,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563686091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:56,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:56,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:56,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439410895] [2024-06-28 04:24:56,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:56,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:56,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:56,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:56,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:56,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:56,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 1011 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 04:24:56,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:56,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:56,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:58,114 INFO L124 PetriNetUnfolderBase]: 1617/2509 cut-off events. [2024-06-28 04:24:58,114 INFO L125 PetriNetUnfolderBase]: For 30952/30956 co-relation queries the response was YES. [2024-06-28 04:24:58,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12425 conditions, 2509 events. 1617/2509 cut-off events. For 30952/30956 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12416 event pairs, 481 based on Foata normal form. 8/2517 useless extension candidates. Maximal degree in co-relation 12384. Up to 1986 conditions per place. [2024-06-28 04:24:58,128 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 88 selfloop transitions, 56 changer transitions 0/149 dead transitions. [2024-06-28 04:24:58,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 1515 flow [2024-06-28 04:24:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 04:24:58,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-28 04:24:58,130 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 1011 flow. Second operand 8 states and 153 transitions. [2024-06-28 04:24:58,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 1515 flow [2024-06-28 04:24:58,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1439 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:58,151 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 1099 flow [2024-06-28 04:24:58,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1099, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-28 04:24:58,151 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-28 04:24:58,151 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 1099 flow [2024-06-28 04:24:58,152 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 04:24:58,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:58,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:58,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:24:58,152 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 04:24:58,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash -514902014, now seen corresponding path program 1 times [2024-06-28 04:24:58,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:58,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282608153] [2024-06-28 04:24:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:58,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:00,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:00,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282608153] [2024-06-28 04:25:00,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282608153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:00,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:00,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:00,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430850281] [2024-06-28 04:25:00,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:00,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:00,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:00,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:00,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:00,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:00,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 1099 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:00,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:00,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:00,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:01,856 INFO L124 PetriNetUnfolderBase]: 1637/2546 cut-off events. [2024-06-28 04:25:01,857 INFO L125 PetriNetUnfolderBase]: For 34889/34897 co-relation queries the response was YES. [2024-06-28 04:25:01,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12760 conditions, 2546 events. 1637/2546 cut-off events. For 34889/34897 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12727 event pairs, 483 based on Foata normal form. 12/2558 useless extension candidates. Maximal degree in co-relation 12718. Up to 2218 conditions per place. [2024-06-28 04:25:01,872 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 42 changer transitions 0/144 dead transitions. [2024-06-28 04:25:01,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1487 flow [2024-06-28 04:25:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 04:25:01,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 04:25:01,874 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 1099 flow. Second operand 7 states and 133 transitions. [2024-06-28 04:25:01,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1487 flow [2024-06-28 04:25:01,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 144 transitions, 1355 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:01,898 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 1084 flow [2024-06-28 04:25:01,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1084, PETRI_PLACES=99, PETRI_TRANSITIONS=112} [2024-06-28 04:25:01,898 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-28 04:25:01,899 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 1084 flow [2024-06-28 04:25:01,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:01,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:01,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:01,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:25:01,899 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 04:25:01,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash 507369654, now seen corresponding path program 4 times [2024-06-28 04:25:01,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:01,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844986951] [2024-06-28 04:25:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:01,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:04,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:04,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844986951] [2024-06-28 04:25:04,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844986951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:04,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:04,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:04,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626515376] [2024-06-28 04:25:04,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:04,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:04,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:04,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:04,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 1084 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 04:25:04,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:04,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:04,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:05,665 INFO L124 PetriNetUnfolderBase]: 1627/2516 cut-off events. [2024-06-28 04:25:05,665 INFO L125 PetriNetUnfolderBase]: For 37378/37382 co-relation queries the response was YES. [2024-06-28 04:25:05,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12808 conditions, 2516 events. 1627/2516 cut-off events. For 37378/37382 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12535 event pairs, 562 based on Foata normal form. 8/2522 useless extension candidates. Maximal degree in co-relation 12765. Up to 2010 conditions per place. [2024-06-28 04:25:05,681 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 82 selfloop transitions, 59 changer transitions 0/146 dead transitions. [2024-06-28 04:25:05,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 146 transitions, 1534 flow [2024-06-28 04:25:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:25:05,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-28 04:25:05,688 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 1084 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:25:05,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 146 transitions, 1534 flow [2024-06-28 04:25:05,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1429 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:05,713 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 1105 flow [2024-06-28 04:25:05,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1105, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-06-28 04:25:05,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-28 04:25:05,714 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 1105 flow [2024-06-28 04:25:05,714 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 04:25:05,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:05,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:05,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:25:05,715 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 04:25:05,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2090974564, now seen corresponding path program 5 times [2024-06-28 04:25:05,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:05,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972158499] [2024-06-28 04:25:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:05,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:07,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:07,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972158499] [2024-06-28 04:25:07,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972158499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:07,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:07,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:25:07,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901645204] [2024-06-28 04:25:07,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:07,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:25:07,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:07,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:25:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:25:07,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:07,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 112 transitions, 1105 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:07,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:07,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:07,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:09,155 INFO L124 PetriNetUnfolderBase]: 1617/2499 cut-off events. [2024-06-28 04:25:09,155 INFO L125 PetriNetUnfolderBase]: For 40100/40108 co-relation queries the response was YES. [2024-06-28 04:25:09,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12889 conditions, 2499 events. 1617/2499 cut-off events. For 40100/40108 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12457 event pairs, 503 based on Foata normal form. 12/2509 useless extension candidates. Maximal degree in co-relation 12845. Up to 2002 conditions per place. [2024-06-28 04:25:09,171 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 79 selfloop transitions, 56 changer transitions 0/140 dead transitions. [2024-06-28 04:25:09,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 140 transitions, 1457 flow [2024-06-28 04:25:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:25:09,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-28 04:25:09,173 INFO L175 Difference]: Start difference. First operand has 102 places, 112 transitions, 1105 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:25:09,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 140 transitions, 1457 flow [2024-06-28 04:25:09,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 140 transitions, 1294 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 04:25:09,200 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1063 flow [2024-06-28 04:25:09,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1063, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-28 04:25:09,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-28 04:25:09,201 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1063 flow [2024-06-28 04:25:09,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:09,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:09,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:09,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:25:09,202 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:09,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:09,202 INFO L85 PathProgramCache]: Analyzing trace with hash 773282260, now seen corresponding path program 2 times [2024-06-28 04:25:09,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:09,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177904424] [2024-06-28 04:25:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:09,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:12,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177904424] [2024-06-28 04:25:12,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177904424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:12,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:12,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:12,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436295430] [2024-06-28 04:25:12,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:12,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:12,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:12,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:12,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:12,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:12,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1063 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:12,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:12,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:12,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:13,224 INFO L124 PetriNetUnfolderBase]: 1637/2554 cut-off events. [2024-06-28 04:25:13,224 INFO L125 PetriNetUnfolderBase]: For 42817/42825 co-relation queries the response was YES. [2024-06-28 04:25:13,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13121 conditions, 2554 events. 1637/2554 cut-off events. For 42817/42825 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12811 event pairs, 494 based on Foata normal form. 12/2565 useless extension candidates. Maximal degree in co-relation 13077. Up to 2228 conditions per place. [2024-06-28 04:25:13,240 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 96 selfloop transitions, 41 changer transitions 0/142 dead transitions. [2024-06-28 04:25:13,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 142 transitions, 1443 flow [2024-06-28 04:25:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 04:25:13,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-28 04:25:13,242 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1063 flow. Second operand 7 states and 127 transitions. [2024-06-28 04:25:13,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 142 transitions, 1443 flow [2024-06-28 04:25:13,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 142 transitions, 1173 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-28 04:25:13,271 INFO L231 Difference]: Finished difference. Result has 98 places, 114 transitions, 911 flow [2024-06-28 04:25:13,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=911, PETRI_PLACES=98, PETRI_TRANSITIONS=114} [2024-06-28 04:25:13,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-28 04:25:13,272 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 114 transitions, 911 flow [2024-06-28 04:25:13,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:13,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:13,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:13,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:25:13,272 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:13,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash 773608690, now seen corresponding path program 3 times [2024-06-28 04:25:13,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:13,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111414996] [2024-06-28 04:25:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:13,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:15,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:15,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111414996] [2024-06-28 04:25:15,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111414996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:15,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:15,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:15,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769315902] [2024-06-28 04:25:15,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:15,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:15,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:15,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:15,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:15,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 114 transitions, 911 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:15,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:15,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:15,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:16,879 INFO L124 PetriNetUnfolderBase]: 1629/2536 cut-off events. [2024-06-28 04:25:16,880 INFO L125 PetriNetUnfolderBase]: For 44123/44131 co-relation queries the response was YES. [2024-06-28 04:25:16,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12892 conditions, 2536 events. 1629/2536 cut-off events. For 44123/44131 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12703 event pairs, 466 based on Foata normal form. 12/2547 useless extension candidates. Maximal degree in co-relation 12850. Up to 2134 conditions per place. [2024-06-28 04:25:16,894 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 46 changer transitions 0/144 dead transitions. [2024-06-28 04:25:16,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1297 flow [2024-06-28 04:25:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 04:25:16,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-28 04:25:16,897 INFO L175 Difference]: Start difference. First operand has 98 places, 114 transitions, 911 flow. Second operand 7 states and 127 transitions. [2024-06-28 04:25:16,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1297 flow [2024-06-28 04:25:16,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 144 transitions, 1199 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:16,929 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 944 flow [2024-06-28 04:25:16,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=944, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2024-06-28 04:25:16,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-28 04:25:16,930 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 944 flow [2024-06-28 04:25:16,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:16,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:16,930 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 04:25:16,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:25:16,931 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:16,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:16,931 INFO L85 PathProgramCache]: Analyzing trace with hash -94576537, now seen corresponding path program 1 times [2024-06-28 04:25:16,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:16,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70295076] [2024-06-28 04:25:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:16,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:19,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:19,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70295076] [2024-06-28 04:25:19,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70295076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:19,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:19,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:19,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614372961] [2024-06-28 04:25:19,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:19,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:19,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:19,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:19,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:19,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:19,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 944 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 04:25:19,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:19,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:19,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:21,092 INFO L124 PetriNetUnfolderBase]: 1801/2826 cut-off events. [2024-06-28 04:25:21,092 INFO L125 PetriNetUnfolderBase]: For 56499/56499 co-relation queries the response was YES. [2024-06-28 04:25:21,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14956 conditions, 2826 events. 1801/2826 cut-off events. For 56499/56499 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14657 event pairs, 422 based on Foata normal form. 4/2830 useless extension candidates. Maximal degree in co-relation 14913. Up to 2319 conditions per place. [2024-06-28 04:25:21,107 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 143 selfloop transitions, 23 changer transitions 0/171 dead transitions. [2024-06-28 04:25:21,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 171 transitions, 1582 flow [2024-06-28 04:25:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 04:25:21,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 04:25:21,108 INFO L175 Difference]: Start difference. First operand has 100 places, 116 transitions, 944 flow. Second operand 9 states and 171 transitions. [2024-06-28 04:25:21,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 171 transitions, 1582 flow [2024-06-28 04:25:21,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 171 transitions, 1469 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:21,150 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 946 flow [2024-06-28 04:25:21,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=946, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-06-28 04:25:21,150 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-28 04:25:21,150 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 946 flow [2024-06-28 04:25:21,151 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 04:25:21,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:21,151 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 04:25:21,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:25:21,151 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:21,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:21,151 INFO L85 PathProgramCache]: Analyzing trace with hash 473294827, now seen corresponding path program 2 times [2024-06-28 04:25:21,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:21,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411676801] [2024-06-28 04:25:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:21,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:24,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:24,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411676801] [2024-06-28 04:25:24,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411676801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:24,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:24,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:24,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16558935] [2024-06-28 04:25:24,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:24,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:24,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:24,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:24,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:24,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 946 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 04:25:24,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:24,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:24,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:25,104 INFO L124 PetriNetUnfolderBase]: 1793/2814 cut-off events. [2024-06-28 04:25:25,104 INFO L125 PetriNetUnfolderBase]: For 59760/59760 co-relation queries the response was YES. [2024-06-28 04:25:25,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14999 conditions, 2814 events. 1793/2814 cut-off events. For 59760/59760 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14590 event pairs, 536 based on Foata normal form. 4/2818 useless extension candidates. Maximal degree in co-relation 14955. Up to 2599 conditions per place. [2024-06-28 04:25:25,122 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 139 selfloop transitions, 21 changer transitions 0/165 dead transitions. [2024-06-28 04:25:25,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 165 transitions, 1432 flow [2024-06-28 04:25:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 04:25:25,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-28 04:25:25,125 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 946 flow. Second operand 9 states and 163 transitions. [2024-06-28 04:25:25,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 165 transitions, 1432 flow [2024-06-28 04:25:25,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 165 transitions, 1369 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:25,166 INFO L231 Difference]: Finished difference. Result has 108 places, 121 transitions, 976 flow [2024-06-28 04:25:25,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=976, PETRI_PLACES=108, PETRI_TRANSITIONS=121} [2024-06-28 04:25:25,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-28 04:25:25,167 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 121 transitions, 976 flow [2024-06-28 04:25:25,167 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 04:25:25,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:25,167 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 04:25:25,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:25:25,167 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:25,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash -326512079, now seen corresponding path program 3 times [2024-06-28 04:25:25,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:25,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109760332] [2024-06-28 04:25:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:25,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:27,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:27,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109760332] [2024-06-28 04:25:27,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109760332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:27,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:27,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:27,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920121519] [2024-06-28 04:25:27,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:27,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:27,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:27,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:27,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:27,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:27,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 121 transitions, 976 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 04:25:27,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:27,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:27,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:29,172 INFO L124 PetriNetUnfolderBase]: 1813/2845 cut-off events. [2024-06-28 04:25:29,172 INFO L125 PetriNetUnfolderBase]: For 65149/65153 co-relation queries the response was YES. [2024-06-28 04:25:29,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15446 conditions, 2845 events. 1813/2845 cut-off events. For 65149/65153 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14723 event pairs, 475 based on Foata normal form. 8/2853 useless extension candidates. Maximal degree in co-relation 15400. Up to 2300 conditions per place. [2024-06-28 04:25:29,191 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 58 changer transitions 0/160 dead transitions. [2024-06-28 04:25:29,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1434 flow [2024-06-28 04:25:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 04:25:29,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 04:25:29,193 INFO L175 Difference]: Start difference. First operand has 108 places, 121 transitions, 976 flow. Second operand 8 states and 150 transitions. [2024-06-28 04:25:29,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1434 flow [2024-06-28 04:25:29,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 160 transitions, 1365 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 04:25:29,241 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 1076 flow [2024-06-28 04:25:29,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1076, PETRI_PLACES=109, PETRI_TRANSITIONS=123} [2024-06-28 04:25:29,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-28 04:25:29,242 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 1076 flow [2024-06-28 04:25:29,242 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 04:25:29,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:29,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:29,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:25:29,242 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 04:25:29,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:29,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2004197475, now seen corresponding path program 1 times [2024-06-28 04:25:29,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:29,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750550476] [2024-06-28 04:25:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:29,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:31,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:31,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750550476] [2024-06-28 04:25:31,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750550476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:31,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:31,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:25:31,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573468686] [2024-06-28 04:25:31,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:31,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:25:31,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:31,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:25:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:25:31,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:31,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 1076 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 04:25:31,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:31,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:31,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:32,262 INFO L124 PetriNetUnfolderBase]: 1823/2852 cut-off events. [2024-06-28 04:25:32,262 INFO L125 PetriNetUnfolderBase]: For 70045/70045 co-relation queries the response was YES. [2024-06-28 04:25:32,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15914 conditions, 2852 events. 1823/2852 cut-off events. For 70045/70045 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14706 event pairs, 529 based on Foata normal form. 2/2854 useless extension candidates. Maximal degree in co-relation 15867. Up to 2678 conditions per place. [2024-06-28 04:25:32,281 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 131 selfloop transitions, 19 changer transitions 0/155 dead transitions. [2024-06-28 04:25:32,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 1554 flow [2024-06-28 04:25:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:25:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:25:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 04:25:32,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-28 04:25:32,288 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 1076 flow. Second operand 6 states and 110 transitions. [2024-06-28 04:25:32,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 1554 flow [2024-06-28 04:25:32,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 155 transitions, 1403 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:32,342 INFO L231 Difference]: Finished difference. Result has 110 places, 132 transitions, 1033 flow [2024-06-28 04:25:32,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1033, PETRI_PLACES=110, PETRI_TRANSITIONS=132} [2024-06-28 04:25:32,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-28 04:25:32,343 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 132 transitions, 1033 flow [2024-06-28 04:25:32,343 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 04:25:32,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:32,343 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 04:25:32,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:25:32,343 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:32,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1397983793, now seen corresponding path program 4 times [2024-06-28 04:25:32,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:32,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326071406] [2024-06-28 04:25:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:32,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:35,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:35,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326071406] [2024-06-28 04:25:35,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326071406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:35,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:35,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:35,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567105309] [2024-06-28 04:25:35,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:35,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:35,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:35,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:35,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 1033 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 04:25:35,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:35,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:35,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:36,568 INFO L124 PetriNetUnfolderBase]: 1815/2842 cut-off events. [2024-06-28 04:25:36,569 INFO L125 PetriNetUnfolderBase]: For 73267/73271 co-relation queries the response was YES. [2024-06-28 04:25:36,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15834 conditions, 2842 events. 1815/2842 cut-off events. For 73267/73271 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14741 event pairs, 565 based on Foata normal form. 8/2848 useless extension candidates. Maximal degree in co-relation 15785. Up to 2302 conditions per place. [2024-06-28 04:25:36,584 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 100 selfloop transitions, 61 changer transitions 0/166 dead transitions. [2024-06-28 04:25:36,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 166 transitions, 1495 flow [2024-06-28 04:25:36,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:25:36,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:25:36,586 INFO L175 Difference]: Start difference. First operand has 110 places, 132 transitions, 1033 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:25:36,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 166 transitions, 1495 flow [2024-06-28 04:25:36,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 166 transitions, 1481 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-28 04:25:36,626 INFO L231 Difference]: Finished difference. Result has 117 places, 134 transitions, 1198 flow [2024-06-28 04:25:36,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1198, PETRI_PLACES=117, PETRI_TRANSITIONS=134} [2024-06-28 04:25:36,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-28 04:25:36,627 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 134 transitions, 1198 flow [2024-06-28 04:25:36,627 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 04:25:36,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:36,627 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 04:25:36,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:25:36,628 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 04:25:36,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:36,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1641160171, now seen corresponding path program 2 times [2024-06-28 04:25:36,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:36,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669659850] [2024-06-28 04:25:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:36,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:38,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669659850] [2024-06-28 04:25:38,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669659850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:38,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:38,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:25:38,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919892123] [2024-06-28 04:25:38,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:38,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:25:38,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:38,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:25:38,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:25:38,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:38,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 134 transitions, 1198 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 04:25:38,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:38,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:38,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:39,680 INFO L124 PetriNetUnfolderBase]: 1809/2832 cut-off events. [2024-06-28 04:25:39,680 INFO L125 PetriNetUnfolderBase]: For 78239/78239 co-relation queries the response was YES. [2024-06-28 04:25:39,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16354 conditions, 2832 events. 1809/2832 cut-off events. For 78239/78239 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14684 event pairs, 541 based on Foata normal form. 2/2832 useless extension candidates. Maximal degree in co-relation 16302. Up to 2661 conditions per place. [2024-06-28 04:25:39,700 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 124 selfloop transitions, 19 changer transitions 0/148 dead transitions. [2024-06-28 04:25:39,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 148 transitions, 1540 flow [2024-06-28 04:25:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:25:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:25:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-28 04:25:39,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:25:39,701 INFO L175 Difference]: Start difference. First operand has 117 places, 134 transitions, 1198 flow. Second operand 6 states and 102 transitions. [2024-06-28 04:25:39,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 148 transitions, 1540 flow [2024-06-28 04:25:39,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 148 transitions, 1373 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:39,757 INFO L231 Difference]: Finished difference. Result has 117 places, 134 transitions, 1075 flow [2024-06-28 04:25:39,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1075, PETRI_PLACES=117, PETRI_TRANSITIONS=134} [2024-06-28 04:25:39,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-28 04:25:39,758 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 134 transitions, 1075 flow [2024-06-28 04:25:39,758 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 04:25:39,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:39,758 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 04:25:39,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:25:39,759 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 04:25:39,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:39,759 INFO L85 PathProgramCache]: Analyzing trace with hash -174064677, now seen corresponding path program 1 times [2024-06-28 04:25:39,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:39,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547805429] [2024-06-28 04:25:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:39,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:41,759 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 04:25:41,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:41,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547805429] [2024-06-28 04:25:41,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547805429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:41,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:41,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:25:41,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577539163] [2024-06-28 04:25:41,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:41,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:25:41,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:41,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:25:41,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:25:41,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:25:41,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 134 transitions, 1075 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:41,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:41,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:25:41,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:42,752 INFO L124 PetriNetUnfolderBase]: 1671/2703 cut-off events. [2024-06-28 04:25:42,752 INFO L125 PetriNetUnfolderBase]: For 69811/69815 co-relation queries the response was YES. [2024-06-28 04:25:42,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14827 conditions, 2703 events. 1671/2703 cut-off events. For 69811/69815 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14494 event pairs, 449 based on Foata normal form. 6/2699 useless extension candidates. Maximal degree in co-relation 14774. Up to 2430 conditions per place. [2024-06-28 04:25:42,770 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 132 selfloop transitions, 23 changer transitions 0/164 dead transitions. [2024-06-28 04:25:42,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 164 transitions, 1643 flow [2024-06-28 04:25:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:25:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:25:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-28 04:25:42,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-28 04:25:42,771 INFO L175 Difference]: Start difference. First operand has 117 places, 134 transitions, 1075 flow. Second operand 6 states and 115 transitions. [2024-06-28 04:25:42,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 164 transitions, 1643 flow [2024-06-28 04:25:42,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 164 transitions, 1602 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 04:25:42,818 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1202 flow [2024-06-28 04:25:42,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1202, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-28 04:25:42,837 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-28 04:25:42,837 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1202 flow [2024-06-28 04:25:42,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:42,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:42,837 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 04:25:42,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:25:42,837 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 04:25:42,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:42,838 INFO L85 PathProgramCache]: Analyzing trace with hash -152667237, now seen corresponding path program 2 times [2024-06-28 04:25:42,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:42,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556354250] [2024-06-28 04:25:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:42,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:44,989 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 04:25:44,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:44,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556354250] [2024-06-28 04:25:44,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556354250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:44,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:44,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:25:44,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034818928] [2024-06-28 04:25:44,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:44,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:25:44,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:44,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:25:44,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:25:45,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:25:45,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1202 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:45,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:45,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:25:45,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:45,889 INFO L124 PetriNetUnfolderBase]: 1715/2760 cut-off events. [2024-06-28 04:25:45,889 INFO L125 PetriNetUnfolderBase]: For 76275/76275 co-relation queries the response was YES. [2024-06-28 04:25:45,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15766 conditions, 2760 events. 1715/2760 cut-off events. For 76275/76275 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14797 event pairs, 459 based on Foata normal form. 3/2758 useless extension candidates. Maximal degree in co-relation 15711. Up to 2534 conditions per place. [2024-06-28 04:25:45,908 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 138 selfloop transitions, 16 changer transitions 0/163 dead transitions. [2024-06-28 04:25:45,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 163 transitions, 1639 flow [2024-06-28 04:25:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:25:45,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-28 04:25:45,909 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1202 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:25:45,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 163 transitions, 1639 flow [2024-06-28 04:25:45,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 1575 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-28 04:25:45,976 INFO L231 Difference]: Finished difference. Result has 127 places, 146 transitions, 1216 flow [2024-06-28 04:25:45,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1216, PETRI_PLACES=127, PETRI_TRANSITIONS=146} [2024-06-28 04:25:45,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-28 04:25:45,977 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 146 transitions, 1216 flow [2024-06-28 04:25:45,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:45,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:45,977 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 04:25:45,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:25:45,978 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:45,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1739408519, now seen corresponding path program 1 times [2024-06-28 04:25:45,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:45,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734074371] [2024-06-28 04:25:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:45,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:48,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:48,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734074371] [2024-06-28 04:25:48,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734074371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:48,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:48,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:48,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449511033] [2024-06-28 04:25:48,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:48,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:48,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:48,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:48,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:48,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 146 transitions, 1216 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:48,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:48,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:48,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:49,687 INFO L124 PetriNetUnfolderBase]: 1931/3023 cut-off events. [2024-06-28 04:25:49,687 INFO L125 PetriNetUnfolderBase]: For 100518/100518 co-relation queries the response was YES. [2024-06-28 04:25:49,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17663 conditions, 3023 events. 1931/3023 cut-off events. For 100518/100518 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15744 event pairs, 414 based on Foata normal form. 16/3039 useless extension candidates. Maximal degree in co-relation 17604. Up to 2434 conditions per place. [2024-06-28 04:25:49,709 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 171 selfloop transitions, 25 changer transitions 0/201 dead transitions. [2024-06-28 04:25:49,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 201 transitions, 1900 flow [2024-06-28 04:25:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 04:25:49,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-28 04:25:49,711 INFO L175 Difference]: Start difference. First operand has 127 places, 146 transitions, 1216 flow. Second operand 9 states and 173 transitions. [2024-06-28 04:25:49,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 201 transitions, 1900 flow [2024-06-28 04:25:49,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 201 transitions, 1860 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:49,782 INFO L231 Difference]: Finished difference. Result has 131 places, 147 transitions, 1255 flow [2024-06-28 04:25:49,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1255, PETRI_PLACES=131, PETRI_TRANSITIONS=147} [2024-06-28 04:25:49,783 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-28 04:25:49,783 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 147 transitions, 1255 flow [2024-06-28 04:25:49,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:49,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:49,783 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 04:25:49,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:25:49,784 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:49,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2103275903, now seen corresponding path program 2 times [2024-06-28 04:25:49,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:49,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063696713] [2024-06-28 04:25:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:52,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:52,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063696713] [2024-06-28 04:25:52,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063696713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:52,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:52,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:52,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848420883] [2024-06-28 04:25:52,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:52,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:52,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:52,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:52,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:52,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:52,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 147 transitions, 1255 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:52,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:52,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:52,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:53,333 INFO L124 PetriNetUnfolderBase]: 1895/2967 cut-off events. [2024-06-28 04:25:53,333 INFO L125 PetriNetUnfolderBase]: For 98836/98836 co-relation queries the response was YES. [2024-06-28 04:25:53,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17120 conditions, 2967 events. 1895/2967 cut-off events. For 98836/98836 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15397 event pairs, 526 based on Foata normal form. 20/2987 useless extension candidates. Maximal degree in co-relation 17060. Up to 2636 conditions per place. [2024-06-28 04:25:53,353 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 170 selfloop transitions, 20 changer transitions 0/195 dead transitions. [2024-06-28 04:25:53,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 195 transitions, 1779 flow [2024-06-28 04:25:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 04:25:53,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-28 04:25:53,356 INFO L175 Difference]: Start difference. First operand has 131 places, 147 transitions, 1255 flow. Second operand 9 states and 166 transitions. [2024-06-28 04:25:53,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 195 transitions, 1779 flow [2024-06-28 04:25:53,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 195 transitions, 1714 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:53,420 INFO L231 Difference]: Finished difference. Result has 134 places, 147 transitions, 1237 flow [2024-06-28 04:25:53,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1237, PETRI_PLACES=134, PETRI_TRANSITIONS=147} [2024-06-28 04:25:53,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-28 04:25:53,421 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 147 transitions, 1237 flow [2024-06-28 04:25:53,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:53,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:53,421 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 04:25:53,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:25:53,421 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:53,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:53,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1332488267, now seen corresponding path program 3 times [2024-06-28 04:25:53,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:53,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401292126] [2024-06-28 04:25:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:53,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:55,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:55,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401292126] [2024-06-28 04:25:55,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401292126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:55,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:55,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024754351] [2024-06-28 04:25:55,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:55,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:55,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:55,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:55,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:55,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:55,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 147 transitions, 1237 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:55,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:55,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:55,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:57,321 INFO L124 PetriNetUnfolderBase]: 1983/3143 cut-off events. [2024-06-28 04:25:57,321 INFO L125 PetriNetUnfolderBase]: For 106144/106152 co-relation queries the response was YES. [2024-06-28 04:25:57,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17751 conditions, 3143 events. 1983/3143 cut-off events. For 106144/106152 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16710 event pairs, 472 based on Foata normal form. 28/3171 useless extension candidates. Maximal degree in co-relation 17690. Up to 2453 conditions per place. [2024-06-28 04:25:57,340 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 127 selfloop transitions, 59 changer transitions 0/191 dead transitions. [2024-06-28 04:25:57,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 191 transitions, 1765 flow [2024-06-28 04:25:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 04:25:57,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-28 04:25:57,342 INFO L175 Difference]: Start difference. First operand has 134 places, 147 transitions, 1237 flow. Second operand 8 states and 155 transitions. [2024-06-28 04:25:57,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 191 transitions, 1765 flow [2024-06-28 04:25:57,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 1704 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-28 04:25:57,412 INFO L231 Difference]: Finished difference. Result has 133 places, 148 transitions, 1331 flow [2024-06-28 04:25:57,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1331, PETRI_PLACES=133, PETRI_TRANSITIONS=148} [2024-06-28 04:25:57,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-28 04:25:57,413 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 148 transitions, 1331 flow [2024-06-28 04:25:57,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:57,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:57,413 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 04:25:57,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:25:57,414 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:57,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:57,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1531790057, now seen corresponding path program 4 times [2024-06-28 04:25:57,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:57,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077415955] [2024-06-28 04:25:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:57,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:00,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:00,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077415955] [2024-06-28 04:26:00,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077415955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:00,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:00,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:00,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69330280] [2024-06-28 04:26:00,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:00,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:00,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:00,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:00,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 148 transitions, 1331 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:00,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:00,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:00,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:02,110 INFO L124 PetriNetUnfolderBase]: 2071/3286 cut-off events. [2024-06-28 04:26:02,110 INFO L125 PetriNetUnfolderBase]: For 114916/114920 co-relation queries the response was YES. [2024-06-28 04:26:02,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18741 conditions, 3286 events. 2071/3286 cut-off events. For 114916/114920 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17782 event pairs, 509 based on Foata normal form. 24/3310 useless extension candidates. Maximal degree in co-relation 18679. Up to 2601 conditions per place. [2024-06-28 04:26:02,139 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 134 selfloop transitions, 57 changer transitions 0/196 dead transitions. [2024-06-28 04:26:02,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 196 transitions, 1883 flow [2024-06-28 04:26:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 04:26:02,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-28 04:26:02,141 INFO L175 Difference]: Start difference. First operand has 133 places, 148 transitions, 1331 flow. Second operand 9 states and 170 transitions. [2024-06-28 04:26:02,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 196 transitions, 1883 flow [2024-06-28 04:26:02,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 196 transitions, 1746 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 04:26:02,228 INFO L231 Difference]: Finished difference. Result has 136 places, 149 transitions, 1347 flow [2024-06-28 04:26:02,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=136, PETRI_TRANSITIONS=149} [2024-06-28 04:26:02,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-28 04:26:02,231 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 149 transitions, 1347 flow [2024-06-28 04:26:02,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:02,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:02,231 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 04:26:02,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:26:02,232 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:02,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:02,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1531937927, now seen corresponding path program 5 times [2024-06-28 04:26:02,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:02,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503349855] [2024-06-28 04:26:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:02,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:05,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:05,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503349855] [2024-06-28 04:26:05,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503349855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:05,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:05,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:05,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840933457] [2024-06-28 04:26:05,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:05,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:05,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:05,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:05,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:05,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 149 transitions, 1347 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:05,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:05,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:05,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:06,999 INFO L124 PetriNetUnfolderBase]: 2139/3402 cut-off events. [2024-06-28 04:26:06,999 INFO L125 PetriNetUnfolderBase]: For 119561/119565 co-relation queries the response was YES. [2024-06-28 04:26:07,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19260 conditions, 3402 events. 2139/3402 cut-off events. For 119561/119565 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18593 event pairs, 493 based on Foata normal form. 20/3422 useless extension candidates. Maximal degree in co-relation 19197. Up to 2583 conditions per place. [2024-06-28 04:26:07,025 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 141 selfloop transitions, 60 changer transitions 0/206 dead transitions. [2024-06-28 04:26:07,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 206 transitions, 1947 flow [2024-06-28 04:26:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:26:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:26:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 04:26:07,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-28 04:26:07,026 INFO L175 Difference]: Start difference. First operand has 136 places, 149 transitions, 1347 flow. Second operand 10 states and 189 transitions. [2024-06-28 04:26:07,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 206 transitions, 1947 flow [2024-06-28 04:26:07,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 206 transitions, 1812 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 04:26:07,107 INFO L231 Difference]: Finished difference. Result has 139 places, 150 transitions, 1372 flow [2024-06-28 04:26:07,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1372, PETRI_PLACES=139, PETRI_TRANSITIONS=150} [2024-06-28 04:26:07,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-28 04:26:07,109 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 150 transitions, 1372 flow [2024-06-28 04:26:07,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:07,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:07,110 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 04:26:07,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:26:07,110 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:07,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:07,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1324863755, now seen corresponding path program 1 times [2024-06-28 04:26:07,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:07,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773447207] [2024-06-28 04:26:07,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:07,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:10,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:10,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773447207] [2024-06-28 04:26:10,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773447207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:10,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:10,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:10,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151296174] [2024-06-28 04:26:10,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:10,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:10,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:10,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:10,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:10,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 150 transitions, 1372 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 04:26:10,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:10,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:10,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:11,527 INFO L124 PetriNetUnfolderBase]: 2311/3689 cut-off events. [2024-06-28 04:26:11,527 INFO L125 PetriNetUnfolderBase]: For 137614/137622 co-relation queries the response was YES. [2024-06-28 04:26:11,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21346 conditions, 3689 events. 2311/3689 cut-off events. For 137614/137622 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20728 event pairs, 534 based on Foata normal form. 20/3709 useless extension candidates. Maximal degree in co-relation 21282. Up to 2405 conditions per place. [2024-06-28 04:26:11,552 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 62 changer transitions 0/199 dead transitions. [2024-06-28 04:26:11,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 199 transitions, 2100 flow [2024-06-28 04:26:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:11,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 04:26:11,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-28 04:26:11,558 INFO L175 Difference]: Start difference. First operand has 139 places, 150 transitions, 1372 flow. Second operand 8 states and 158 transitions. [2024-06-28 04:26:11,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 199 transitions, 2100 flow [2024-06-28 04:26:11,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 199 transitions, 1952 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-28 04:26:11,670 INFO L231 Difference]: Finished difference. Result has 139 places, 152 transitions, 1424 flow [2024-06-28 04:26:11,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1424, PETRI_PLACES=139, PETRI_TRANSITIONS=152} [2024-06-28 04:26:11,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-28 04:26:11,671 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 152 transitions, 1424 flow [2024-06-28 04:26:11,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 04:26:11,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:11,671 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 04:26:11,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:26:11,672 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 04:26:11,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash -755767291, now seen corresponding path program 1 times [2024-06-28 04:26:11,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:11,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151730419] [2024-06-28 04:26:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:11,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:14,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:14,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151730419] [2024-06-28 04:26:14,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151730419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:14,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:14,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:26:14,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138335078] [2024-06-28 04:26:14,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:14,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:26:14,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:26:14,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:26:14,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:14,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 152 transitions, 1424 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 04:26:14,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:14,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:14,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:15,408 INFO L124 PetriNetUnfolderBase]: 2397/3810 cut-off events. [2024-06-28 04:26:15,409 INFO L125 PetriNetUnfolderBase]: For 142074/142074 co-relation queries the response was YES. [2024-06-28 04:26:15,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22149 conditions, 3810 events. 2397/3810 cut-off events. For 142074/142074 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21470 event pairs, 674 based on Foata normal form. 4/3812 useless extension candidates. Maximal degree in co-relation 22084. Up to 3522 conditions per place. [2024-06-28 04:26:15,438 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 159 selfloop transitions, 37 changer transitions 0/201 dead transitions. [2024-06-28 04:26:15,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 201 transitions, 2260 flow [2024-06-28 04:26:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:26:15,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-28 04:26:15,440 INFO L175 Difference]: Start difference. First operand has 139 places, 152 transitions, 1424 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:26:15,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 201 transitions, 2260 flow [2024-06-28 04:26:15,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 201 transitions, 2156 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 04:26:15,560 INFO L231 Difference]: Finished difference. Result has 147 places, 172 transitions, 1641 flow [2024-06-28 04:26:15,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1641, PETRI_PLACES=147, PETRI_TRANSITIONS=172} [2024-06-28 04:26:15,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-28 04:26:15,561 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 172 transitions, 1641 flow [2024-06-28 04:26:15,561 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 04:26:15,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:15,561 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 04:26:15,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:26:15,561 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 04:26:15,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1995219749, now seen corresponding path program 2 times [2024-06-28 04:26:15,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:15,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817419692] [2024-06-28 04:26:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:15,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:17,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:17,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817419692] [2024-06-28 04:26:17,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817419692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:17,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:17,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:26:17,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730906771] [2024-06-28 04:26:17,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:17,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:26:17,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:17,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:26:17,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:26:17,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:17,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 172 transitions, 1641 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 04:26:17,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:17,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:17,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:19,048 INFO L124 PetriNetUnfolderBase]: 2424/3854 cut-off events. [2024-06-28 04:26:19,048 INFO L125 PetriNetUnfolderBase]: For 144376/144376 co-relation queries the response was YES. [2024-06-28 04:26:19,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22775 conditions, 3854 events. 2424/3854 cut-off events. For 144376/144376 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21864 event pairs, 673 based on Foata normal form. 4/3858 useless extension candidates. Maximal degree in co-relation 22704. Up to 3544 conditions per place. [2024-06-28 04:26:19,080 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 161 selfloop transitions, 50 changer transitions 0/216 dead transitions. [2024-06-28 04:26:19,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 216 transitions, 2371 flow [2024-06-28 04:26:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:26:19,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-28 04:26:19,083 INFO L175 Difference]: Start difference. First operand has 147 places, 172 transitions, 1641 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:26:19,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 216 transitions, 2371 flow [2024-06-28 04:26:19,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 216 transitions, 2325 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-28 04:26:19,205 INFO L231 Difference]: Finished difference. Result has 157 places, 185 transitions, 1893 flow [2024-06-28 04:26:19,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1893, PETRI_PLACES=157, PETRI_TRANSITIONS=185} [2024-06-28 04:26:19,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-28 04:26:19,205 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 185 transitions, 1893 flow [2024-06-28 04:26:19,206 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 04:26:19,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:19,206 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 04:26:19,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:26:19,206 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:19,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:19,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1779639677, now seen corresponding path program 6 times [2024-06-28 04:26:19,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:19,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028857569] [2024-06-28 04:26:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:19,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:21,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:21,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028857569] [2024-06-28 04:26:21,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028857569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:21,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:21,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:26:21,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107189043] [2024-06-28 04:26:21,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:21,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:26:21,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:21,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:26:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:26:21,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:21,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 185 transitions, 1893 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:21,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:21,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:21,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:23,443 INFO L124 PetriNetUnfolderBase]: 2512/4012 cut-off events. [2024-06-28 04:26:23,443 INFO L125 PetriNetUnfolderBase]: For 163699/163707 co-relation queries the response was YES. [2024-06-28 04:26:23,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24068 conditions, 4012 events. 2512/4012 cut-off events. For 163699/163707 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22948 event pairs, 624 based on Foata normal form. 28/4037 useless extension candidates. Maximal degree in co-relation 23991. Up to 3283 conditions per place. [2024-06-28 04:26:23,473 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 155 selfloop transitions, 63 changer transitions 0/223 dead transitions. [2024-06-28 04:26:23,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 223 transitions, 2491 flow [2024-06-28 04:26:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:26:23,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-28 04:26:23,475 INFO L175 Difference]: Start difference. First operand has 157 places, 185 transitions, 1893 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:26:23,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 223 transitions, 2491 flow [2024-06-28 04:26:23,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 223 transitions, 2412 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 04:26:23,606 INFO L231 Difference]: Finished difference. Result has 161 places, 186 transitions, 1985 flow [2024-06-28 04:26:23,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1985, PETRI_PLACES=161, PETRI_TRANSITIONS=186} [2024-06-28 04:26:23,615 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-28 04:26:23,615 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 186 transitions, 1985 flow [2024-06-28 04:26:23,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:23,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:23,616 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 04:26:23,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:26:23,616 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:23,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2043977419, now seen corresponding path program 7 times [2024-06-28 04:26:23,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:23,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251828289] [2024-06-28 04:26:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:23,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:26,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:26,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251828289] [2024-06-28 04:26:26,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251828289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:26,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:26,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:26,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821284410] [2024-06-28 04:26:26,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:26,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:26,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:26,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:26,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:26,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:26,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 186 transitions, 1985 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:26,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:26,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:26,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:28,248 INFO L124 PetriNetUnfolderBase]: 2476/3958 cut-off events. [2024-06-28 04:26:28,248 INFO L125 PetriNetUnfolderBase]: For 159867/159871 co-relation queries the response was YES. [2024-06-28 04:26:28,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23419 conditions, 3958 events. 2476/3958 cut-off events. For 159867/159871 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22607 event pairs, 669 based on Foata normal form. 24/3979 useless extension candidates. Maximal degree in co-relation 23341. Up to 3227 conditions per place. [2024-06-28 04:26:28,275 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 152 selfloop transitions, 70 changer transitions 0/227 dead transitions. [2024-06-28 04:26:28,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 227 transitions, 2569 flow [2024-06-28 04:26:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 04:26:28,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-28 04:26:28,277 INFO L175 Difference]: Start difference. First operand has 161 places, 186 transitions, 1985 flow. Second operand 9 states and 164 transitions. [2024-06-28 04:26:28,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 227 transitions, 2569 flow [2024-06-28 04:26:28,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 227 transitions, 2400 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 04:26:28,442 INFO L231 Difference]: Finished difference. Result has 164 places, 186 transitions, 1963 flow [2024-06-28 04:26:28,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1963, PETRI_PLACES=164, PETRI_TRANSITIONS=186} [2024-06-28 04:26:28,443 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-28 04:26:28,443 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 186 transitions, 1963 flow [2024-06-28 04:26:28,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:28,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:28,443 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 04:26:28,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:26:28,443 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:28,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash 387826553, now seen corresponding path program 8 times [2024-06-28 04:26:28,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:28,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053679168] [2024-06-28 04:26:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:28,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:31,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:31,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053679168] [2024-06-28 04:26:31,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053679168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:31,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:31,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:31,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848979450] [2024-06-28 04:26:31,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:31,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:31,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:31,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:31,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:31,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:31,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 186 transitions, 1963 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:31,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:31,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:31,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:32,823 INFO L124 PetriNetUnfolderBase]: 2488/3978 cut-off events. [2024-06-28 04:26:32,824 INFO L125 PetriNetUnfolderBase]: For 155809/155813 co-relation queries the response was YES. [2024-06-28 04:26:32,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23024 conditions, 3978 events. 2488/3978 cut-off events. For 155809/155813 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22720 event pairs, 649 based on Foata normal form. 20/3995 useless extension candidates. Maximal degree in co-relation 22945. Up to 3121 conditions per place. [2024-06-28 04:26:32,856 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 159 selfloop transitions, 73 changer transitions 0/237 dead transitions. [2024-06-28 04:26:32,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 237 transitions, 2633 flow [2024-06-28 04:26:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:26:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:26:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 04:26:32,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-28 04:26:32,858 INFO L175 Difference]: Start difference. First operand has 164 places, 186 transitions, 1963 flow. Second operand 10 states and 183 transitions. [2024-06-28 04:26:32,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 237 transitions, 2633 flow [2024-06-28 04:26:32,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 237 transitions, 2471 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 04:26:32,986 INFO L231 Difference]: Finished difference. Result has 166 places, 187 transitions, 1993 flow [2024-06-28 04:26:32,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1993, PETRI_PLACES=166, PETRI_TRANSITIONS=187} [2024-06-28 04:26:32,987 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-28 04:26:32,987 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 187 transitions, 1993 flow [2024-06-28 04:26:32,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:32,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:32,987 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 04:26:32,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:26:32,988 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:32,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2029198885, now seen corresponding path program 2 times [2024-06-28 04:26:32,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:32,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674092410] [2024-06-28 04:26:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:32,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:36,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:36,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674092410] [2024-06-28 04:26:36,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674092410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:36,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:36,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:36,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657673959] [2024-06-28 04:26:36,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:36,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:36,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:36,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:36,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 187 transitions, 1993 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 04:26:36,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:36,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:36,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:37,603 INFO L124 PetriNetUnfolderBase]: 2536/4076 cut-off events. [2024-06-28 04:26:37,604 INFO L125 PetriNetUnfolderBase]: For 161918/161926 co-relation queries the response was YES. [2024-06-28 04:26:37,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23583 conditions, 4076 events. 2536/4076 cut-off events. For 161918/161926 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23604 event pairs, 614 based on Foata normal form. 20/4093 useless extension candidates. Maximal degree in co-relation 23503. Up to 3229 conditions per place. [2024-06-28 04:26:37,637 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 159 selfloop transitions, 64 changer transitions 0/228 dead transitions. [2024-06-28 04:26:37,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 228 transitions, 2623 flow [2024-06-28 04:26:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 04:26:37,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-28 04:26:37,639 INFO L175 Difference]: Start difference. First operand has 166 places, 187 transitions, 1993 flow. Second operand 8 states and 151 transitions. [2024-06-28 04:26:37,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 228 transitions, 2623 flow [2024-06-28 04:26:37,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 228 transitions, 2443 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-28 04:26:37,816 INFO L231 Difference]: Finished difference. Result has 166 places, 188 transitions, 1989 flow [2024-06-28 04:26:37,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1989, PETRI_PLACES=166, PETRI_TRANSITIONS=188} [2024-06-28 04:26:37,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-28 04:26:37,816 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 188 transitions, 1989 flow [2024-06-28 04:26:37,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 04:26:37,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:37,817 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 04:26:37,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:26:37,817 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:37,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:37,817 INFO L85 PathProgramCache]: Analyzing trace with hash -254181365, now seen corresponding path program 3 times [2024-06-28 04:26:37,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:37,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18540329] [2024-06-28 04:26:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:37,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:40,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:40,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18540329] [2024-06-28 04:26:40,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18540329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:40,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:40,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:40,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212770713] [2024-06-28 04:26:40,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:40,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:40,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:40,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:40,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:41,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:41,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 188 transitions, 1989 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 04:26:41,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:41,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:41,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:42,456 INFO L124 PetriNetUnfolderBase]: 2516/4032 cut-off events. [2024-06-28 04:26:42,456 INFO L125 PetriNetUnfolderBase]: For 157352/157360 co-relation queries the response was YES. [2024-06-28 04:26:42,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22778 conditions, 4032 events. 2516/4032 cut-off events. For 157352/157360 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23211 event pairs, 565 based on Foata normal form. 20/4049 useless extension candidates. Maximal degree in co-relation 22697. Up to 2363 conditions per place. [2024-06-28 04:26:42,488 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 148 selfloop transitions, 73 changer transitions 0/226 dead transitions. [2024-06-28 04:26:42,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 226 transitions, 2495 flow [2024-06-28 04:26:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:26:42,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-28 04:26:42,490 INFO L175 Difference]: Start difference. First operand has 166 places, 188 transitions, 1989 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:26:42,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 226 transitions, 2495 flow [2024-06-28 04:26:42,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 226 transitions, 2335 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 04:26:42,629 INFO L231 Difference]: Finished difference. Result has 167 places, 187 transitions, 1907 flow [2024-06-28 04:26:42,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1907, PETRI_PLACES=167, PETRI_TRANSITIONS=187} [2024-06-28 04:26:42,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-28 04:26:42,630 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 187 transitions, 1907 flow [2024-06-28 04:26:42,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 04:26:42,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:42,630 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 04:26:42,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:26:42,630 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 04:26:42,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:42,631 INFO L85 PathProgramCache]: Analyzing trace with hash -744667741, now seen corresponding path program 3 times [2024-06-28 04:26:42,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:42,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021974030] [2024-06-28 04:26:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:42,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:44,950 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 04:26:44,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:44,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021974030] [2024-06-28 04:26:44,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021974030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:44,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:44,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:26:44,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367085468] [2024-06-28 04:26:44,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:44,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:26:44,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:44,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:26:44,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:26:44,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:44,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 187 transitions, 1907 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 04:26:44,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:44,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:44,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:46,354 INFO L124 PetriNetUnfolderBase]: 2536/4070 cut-off events. [2024-06-28 04:26:46,354 INFO L125 PetriNetUnfolderBase]: For 156574/156574 co-relation queries the response was YES. [2024-06-28 04:26:46,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23049 conditions, 4070 events. 2536/4070 cut-off events. For 156574/156574 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23585 event pairs, 700 based on Foata normal form. 4/4071 useless extension candidates. Maximal degree in co-relation 22967. Up to 3732 conditions per place. [2024-06-28 04:26:46,389 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 154 selfloop transitions, 49 changer transitions 0/208 dead transitions. [2024-06-28 04:26:46,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 208 transitions, 2506 flow [2024-06-28 04:26:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:26:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:26:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:26:46,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-28 04:26:46,393 INFO L175 Difference]: Start difference. First operand has 167 places, 187 transitions, 1907 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:26:46,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 208 transitions, 2506 flow [2024-06-28 04:26:46,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 208 transitions, 2262 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-28 04:26:46,536 INFO L231 Difference]: Finished difference. Result has 166 places, 190 transitions, 1806 flow [2024-06-28 04:26:46,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1806, PETRI_PLACES=166, PETRI_TRANSITIONS=190} [2024-06-28 04:26:46,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-28 04:26:46,538 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 190 transitions, 1806 flow [2024-06-28 04:26:46,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:46,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:46,538 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 04:26:46,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:26:46,538 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 04:26:46,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:46,539 INFO L85 PathProgramCache]: Analyzing trace with hash -735182973, now seen corresponding path program 4 times [2024-06-28 04:26:46,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:46,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302023622] [2024-06-28 04:26:46,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:46,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:48,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:48,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302023622] [2024-06-28 04:26:48,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302023622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:48,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:48,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:26:48,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024037082] [2024-06-28 04:26:48,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:48,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:26:48,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:26:48,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:26:48,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:48,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 190 transitions, 1806 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 04:26:48,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:48,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:48,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:49,973 INFO L124 PetriNetUnfolderBase]: 2524/4073 cut-off events. [2024-06-28 04:26:49,973 INFO L125 PetriNetUnfolderBase]: For 156711/156711 co-relation queries the response was YES. [2024-06-28 04:26:49,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22163 conditions, 4073 events. 2524/4073 cut-off events. For 156711/156711 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23897 event pairs, 1183 based on Foata normal form. 4/4077 useless extension candidates. Maximal degree in co-relation 22082. Up to 3888 conditions per place. [2024-06-28 04:26:50,006 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 184 selfloop transitions, 15 changer transitions 0/204 dead transitions. [2024-06-28 04:26:50,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 204 transitions, 2248 flow [2024-06-28 04:26:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:26:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:26:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 04:26:50,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-28 04:26:50,008 INFO L175 Difference]: Start difference. First operand has 166 places, 190 transitions, 1806 flow. Second operand 7 states and 111 transitions. [2024-06-28 04:26:50,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 204 transitions, 2248 flow [2024-06-28 04:26:50,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 204 transitions, 2128 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 04:26:50,171 INFO L231 Difference]: Finished difference. Result has 169 places, 190 transitions, 1722 flow [2024-06-28 04:26:50,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1722, PETRI_PLACES=169, PETRI_TRANSITIONS=190} [2024-06-28 04:26:50,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-28 04:26:50,172 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 190 transitions, 1722 flow [2024-06-28 04:26:50,172 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 04:26:50,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:50,172 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 04:26:50,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:26:50,172 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 04:26:50,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2087636691, now seen corresponding path program 1 times [2024-06-28 04:26:50,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:50,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459133447] [2024-06-28 04:26:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:50,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:52,025 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 04:26:52,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:52,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459133447] [2024-06-28 04:26:52,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459133447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:52,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:52,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:26:52,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468941351] [2024-06-28 04:26:52,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:52,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:26:52,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:52,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:26:52,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:26:52,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:26:52,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 190 transitions, 1722 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:52,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:52,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:26:52,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:53,204 INFO L124 PetriNetUnfolderBase]: 2403/3951 cut-off events. [2024-06-28 04:26:53,205 INFO L125 PetriNetUnfolderBase]: For 140628/140631 co-relation queries the response was YES. [2024-06-28 04:26:53,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20628 conditions, 3951 events. 2403/3951 cut-off events. For 140628/140631 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23738 event pairs, 1042 based on Foata normal form. 7/3926 useless extension candidates. Maximal degree in co-relation 20546. Up to 3605 conditions per place. [2024-06-28 04:26:53,237 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 175 selfloop transitions, 27 changer transitions 0/213 dead transitions. [2024-06-28 04:26:53,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 213 transitions, 2303 flow [2024-06-28 04:26:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:26:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:26:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-28 04:26:53,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 04:26:53,238 INFO L175 Difference]: Start difference. First operand has 169 places, 190 transitions, 1722 flow. Second operand 6 states and 114 transitions. [2024-06-28 04:26:53,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 213 transitions, 2303 flow [2024-06-28 04:26:53,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 213 transitions, 2230 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 04:26:53,375 INFO L231 Difference]: Finished difference. Result has 167 places, 193 transitions, 1742 flow [2024-06-28 04:26:53,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1649, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1742, PETRI_PLACES=167, PETRI_TRANSITIONS=193} [2024-06-28 04:26:53,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-28 04:26:53,376 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 193 transitions, 1742 flow [2024-06-28 04:26:53,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:53,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:53,376 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 04:26:53,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:26:53,377 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 04:26:53,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:53,377 INFO L85 PathProgramCache]: Analyzing trace with hash 832807243, now seen corresponding path program 2 times [2024-06-28 04:26:53,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:53,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354992381] [2024-06-28 04:26:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:53,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:55,605 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 04:26:55,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:55,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354992381] [2024-06-28 04:26:55,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354992381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:55,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:55,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:26:55,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727124225] [2024-06-28 04:26:55,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:55,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:26:55,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:55,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:26:55,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:26:55,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:26:55,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 193 transitions, 1742 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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 04:26:55,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:55,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:26:55,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:57,112 INFO L124 PetriNetUnfolderBase]: 2409/3961 cut-off events. [2024-06-28 04:26:57,112 INFO L125 PetriNetUnfolderBase]: For 144301/144304 co-relation queries the response was YES. [2024-06-28 04:26:57,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20749 conditions, 3961 events. 2409/3961 cut-off events. For 144301/144304 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23766 event pairs, 1064 based on Foata normal form. 7/3935 useless extension candidates. Maximal degree in co-relation 20668. Up to 3613 conditions per place. [2024-06-28 04:26:57,139 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 174 selfloop transitions, 30 changer transitions 0/215 dead transitions. [2024-06-28 04:26:57,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 215 transitions, 2300 flow [2024-06-28 04:26:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:26:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:26:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 04:26:57,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-28 04:26:57,141 INFO L175 Difference]: Start difference. First operand has 167 places, 193 transitions, 1742 flow. Second operand 7 states and 128 transitions. [2024-06-28 04:26:57,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 215 transitions, 2300 flow [2024-06-28 04:26:57,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 215 transitions, 2221 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 04:26:57,329 INFO L231 Difference]: Finished difference. Result has 170 places, 193 transitions, 1729 flow [2024-06-28 04:26:57,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1729, PETRI_PLACES=170, PETRI_TRANSITIONS=193} [2024-06-28 04:26:57,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-28 04:26:57,329 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 193 transitions, 1729 flow [2024-06-28 04:26:57,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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 04:26:57,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:57,330 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 04:26:57,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:26:57,330 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 04:26:57,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:57,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1328794925, now seen corresponding path program 3 times [2024-06-28 04:26:57,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:57,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215966827] [2024-06-28 04:26:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:57,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:59,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:59,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215966827] [2024-06-28 04:26:59,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215966827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:59,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:59,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:26:59,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075220011] [2024-06-28 04:26:59,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:59,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:26:59,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:59,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:26:59,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:26:59,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:26:59,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 193 transitions, 1729 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:59,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:59,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:26:59,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:00,562 INFO L124 PetriNetUnfolderBase]: 2379/3912 cut-off events. [2024-06-28 04:27:00,562 INFO L125 PetriNetUnfolderBase]: For 142974/142975 co-relation queries the response was YES. [2024-06-28 04:27:00,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20354 conditions, 3912 events. 2379/3912 cut-off events. For 142974/142975 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23479 event pairs, 1069 based on Foata normal form. 5/3887 useless extension candidates. Maximal degree in co-relation 20273. Up to 3660 conditions per place. [2024-06-28 04:27:00,590 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 180 selfloop transitions, 17 changer transitions 0/208 dead transitions. [2024-06-28 04:27:00,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 208 transitions, 2161 flow [2024-06-28 04:27:00,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:27:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:27:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 04:27:00,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-28 04:27:00,592 INFO L175 Difference]: Start difference. First operand has 170 places, 193 transitions, 1729 flow. Second operand 7 states and 118 transitions. [2024-06-28 04:27:00,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 208 transitions, 2161 flow [2024-06-28 04:27:00,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 208 transitions, 2045 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-28 04:27:00,738 INFO L231 Difference]: Finished difference. Result has 168 places, 193 transitions, 1653 flow [2024-06-28 04:27:00,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1653, PETRI_PLACES=168, PETRI_TRANSITIONS=193} [2024-06-28 04:27:00,738 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-28 04:27:00,739 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 193 transitions, 1653 flow [2024-06-28 04:27:00,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:00,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:00,739 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 04:27:00,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:27:00,739 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 04:27:00,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash 664106069, now seen corresponding path program 1 times [2024-06-28 04:27:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:00,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683631358] [2024-06-28 04:27:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:03,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:03,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683631358] [2024-06-28 04:27:03,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683631358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:03,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:03,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:27:03,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215550273] [2024-06-28 04:27:03,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:03,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:27:03,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:03,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:27:03,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:27:03,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:03,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 193 transitions, 1653 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 04:27:03,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:03,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:03,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:04,872 INFO L124 PetriNetUnfolderBase]: 2513/4072 cut-off events. [2024-06-28 04:27:04,873 INFO L125 PetriNetUnfolderBase]: For 163853/163853 co-relation queries the response was YES. [2024-06-28 04:27:04,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21482 conditions, 4072 events. 2513/4072 cut-off events. For 163853/163853 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23905 event pairs, 1166 based on Foata normal form. 2/4074 useless extension candidates. Maximal degree in co-relation 21403. Up to 3885 conditions per place. [2024-06-28 04:27:04,906 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 189 selfloop transitions, 14 changer transitions 0/208 dead transitions. [2024-06-28 04:27:04,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 208 transitions, 2117 flow [2024-06-28 04:27:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:27:04,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:27:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 04:27:04,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-28 04:27:04,907 INFO L175 Difference]: Start difference. First operand has 168 places, 193 transitions, 1653 flow. Second operand 7 states and 109 transitions. [2024-06-28 04:27:04,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 208 transitions, 2117 flow [2024-06-28 04:27:05,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 208 transitions, 2083 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 04:27:05,103 INFO L231 Difference]: Finished difference. Result has 169 places, 195 transitions, 1680 flow [2024-06-28 04:27:05,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1680, PETRI_PLACES=169, PETRI_TRANSITIONS=195} [2024-06-28 04:27:05,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-28 04:27:05,104 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 195 transitions, 1680 flow [2024-06-28 04:27:05,104 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 04:27:05,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:05,104 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 04:27:05,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:27:05,105 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 04:27:05,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:05,105 INFO L85 PathProgramCache]: Analyzing trace with hash 410769030, now seen corresponding path program 1 times [2024-06-28 04:27:05,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:05,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868972366] [2024-06-28 04:27:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:05,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:07,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:07,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868972366] [2024-06-28 04:27:07,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868972366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:07,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:07,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:27:07,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113518025] [2024-06-28 04:27:07,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:07,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:27:07,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:27:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:27:07,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:07,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 195 transitions, 1680 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 04:27:07,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:07,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:07,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:08,448 INFO L124 PetriNetUnfolderBase]: 2559/4135 cut-off events. [2024-06-28 04:27:08,449 INFO L125 PetriNetUnfolderBase]: For 174260/174262 co-relation queries the response was YES. [2024-06-28 04:27:08,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22214 conditions, 4135 events. 2559/4135 cut-off events. For 174260/174262 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 24064 event pairs, 627 based on Foata normal form. 3/4138 useless extension candidates. Maximal degree in co-relation 22134. Up to 3626 conditions per place. [2024-06-28 04:27:08,483 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 200 selfloop transitions, 60 changer transitions 0/265 dead transitions. [2024-06-28 04:27:08,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 265 transitions, 2919 flow [2024-06-28 04:27:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 04:27:08,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-28 04:27:08,485 INFO L175 Difference]: Start difference. First operand has 169 places, 195 transitions, 1680 flow. Second operand 8 states and 154 transitions. [2024-06-28 04:27:08,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 265 transitions, 2919 flow [2024-06-28 04:27:08,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 265 transitions, 2874 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:08,613 INFO L231 Difference]: Finished difference. Result has 176 places, 225 transitions, 2129 flow [2024-06-28 04:27:08,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2129, PETRI_PLACES=176, PETRI_TRANSITIONS=225} [2024-06-28 04:27:08,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-28 04:27:08,614 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 225 transitions, 2129 flow [2024-06-28 04:27:08,614 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 04:27:08,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:08,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:08,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:27:08,615 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 04:27:08,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:08,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1766463366, now seen corresponding path program 2 times [2024-06-28 04:27:08,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:08,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321953444] [2024-06-28 04:27:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:08,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:11,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:11,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321953444] [2024-06-28 04:27:11,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321953444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:11,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:11,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:27:11,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417008450] [2024-06-28 04:27:11,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:11,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:27:11,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:11,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:27:11,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:27:11,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:11,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 225 transitions, 2129 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 04:27:11,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:11,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:11,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:12,403 INFO L124 PetriNetUnfolderBase]: 2593/4173 cut-off events. [2024-06-28 04:27:12,403 INFO L125 PetriNetUnfolderBase]: For 189000/189000 co-relation queries the response was YES. [2024-06-28 04:27:12,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23759 conditions, 4173 events. 2593/4173 cut-off events. For 189000/189000 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24338 event pairs, 683 based on Foata normal form. 2/4175 useless extension candidates. Maximal degree in co-relation 23674. Up to 3880 conditions per place. [2024-06-28 04:27:12,434 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 202 selfloop transitions, 56 changer transitions 0/263 dead transitions. [2024-06-28 04:27:12,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 263 transitions, 2942 flow [2024-06-28 04:27:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:12,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 04:27:12,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-28 04:27:12,436 INFO L175 Difference]: Start difference. First operand has 176 places, 225 transitions, 2129 flow. Second operand 9 states and 155 transitions. [2024-06-28 04:27:12,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 263 transitions, 2942 flow [2024-06-28 04:27:12,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 263 transitions, 2870 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-28 04:27:12,616 INFO L231 Difference]: Finished difference. Result has 185 places, 234 transitions, 2300 flow [2024-06-28 04:27:12,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2300, PETRI_PLACES=185, PETRI_TRANSITIONS=234} [2024-06-28 04:27:12,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-28 04:27:12,617 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 234 transitions, 2300 flow [2024-06-28 04:27:12,617 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 04:27:12,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:12,617 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 04:27:12,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:27:12,618 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 04:27:12,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:12,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1109531716, now seen corresponding path program 3 times [2024-06-28 04:27:12,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:12,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029374542] [2024-06-28 04:27:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:12,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:14,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:14,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029374542] [2024-06-28 04:27:14,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029374542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:14,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:14,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:27:14,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587199476] [2024-06-28 04:27:14,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:14,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:27:14,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:14,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:27:14,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:27:14,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:14,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 234 transitions, 2300 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 04:27:14,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:14,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:14,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:16,239 INFO L124 PetriNetUnfolderBase]: 2611/4207 cut-off events. [2024-06-28 04:27:16,240 INFO L125 PetriNetUnfolderBase]: For 199989/199991 co-relation queries the response was YES. [2024-06-28 04:27:16,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24717 conditions, 4207 events. 2611/4207 cut-off events. For 199989/199991 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24501 event pairs, 628 based on Foata normal form. 4/4211 useless extension candidates. Maximal degree in co-relation 24628. Up to 3682 conditions per place. [2024-06-28 04:27:16,274 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 194 selfloop transitions, 75 changer transitions 0/274 dead transitions. [2024-06-28 04:27:16,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 274 transitions, 3319 flow [2024-06-28 04:27:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:27:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:27:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 04:27:16,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-28 04:27:16,276 INFO L175 Difference]: Start difference. First operand has 185 places, 234 transitions, 2300 flow. Second operand 7 states and 131 transitions. [2024-06-28 04:27:16,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 274 transitions, 3319 flow [2024-06-28 04:27:16,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 274 transitions, 3210 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:16,481 INFO L231 Difference]: Finished difference. Result has 189 places, 244 transitions, 2582 flow [2024-06-28 04:27:16,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2191, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2582, PETRI_PLACES=189, PETRI_TRANSITIONS=244} [2024-06-28 04:27:16,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-28 04:27:16,481 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 244 transitions, 2582 flow [2024-06-28 04:27:16,481 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 04:27:16,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:16,482 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 04:27:16,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:27:16,482 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 04:27:16,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1888496194, now seen corresponding path program 4 times [2024-06-28 04:27:16,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:16,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925476851] [2024-06-28 04:27:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:16,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:18,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925476851] [2024-06-28 04:27:18,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925476851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:18,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:18,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:27:18,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962984138] [2024-06-28 04:27:18,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:18,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:27:18,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:18,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:27:18,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:27:18,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:18,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 244 transitions, 2582 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 04:27:18,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:18,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:18,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:19,841 INFO L124 PetriNetUnfolderBase]: 2653/4248 cut-off events. [2024-06-28 04:27:19,842 INFO L125 PetriNetUnfolderBase]: For 216209/216209 co-relation queries the response was YES. [2024-06-28 04:27:19,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26081 conditions, 4248 events. 2653/4248 cut-off events. For 216209/216209 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24701 event pairs, 688 based on Foata normal form. 2/4250 useless extension candidates. Maximal degree in co-relation 25989. Up to 3939 conditions per place. [2024-06-28 04:27:19,882 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 207 selfloop transitions, 68 changer transitions 0/280 dead transitions. [2024-06-28 04:27:19,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 280 transitions, 3524 flow [2024-06-28 04:27:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:19,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:27:19,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:27:19,885 INFO L175 Difference]: Start difference. First operand has 189 places, 244 transitions, 2582 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:27:19,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 280 transitions, 3524 flow [2024-06-28 04:27:20,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 280 transitions, 3392 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 04:27:20,105 INFO L231 Difference]: Finished difference. Result has 195 places, 256 transitions, 2825 flow [2024-06-28 04:27:20,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2462, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2825, PETRI_PLACES=195, PETRI_TRANSITIONS=256} [2024-06-28 04:27:20,106 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-28 04:27:20,106 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 256 transitions, 2825 flow [2024-06-28 04:27:20,107 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 04:27:20,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:20,107 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 04:27:20,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:27:20,107 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 04:27:20,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:20,107 INFO L85 PathProgramCache]: Analyzing trace with hash 215254170, now seen corresponding path program 5 times [2024-06-28 04:27:20,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:20,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720448816] [2024-06-28 04:27:20,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:20,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:22,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:22,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720448816] [2024-06-28 04:27:22,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720448816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:22,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:22,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:27:22,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652031886] [2024-06-28 04:27:22,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:22,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:27:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:27:22,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:27:22,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:22,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 256 transitions, 2825 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 04:27:22,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:22,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:22,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:23,657 INFO L124 PetriNetUnfolderBase]: 2655/4261 cut-off events. [2024-06-28 04:27:23,658 INFO L125 PetriNetUnfolderBase]: For 224914/224916 co-relation queries the response was YES. [2024-06-28 04:27:23,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26660 conditions, 4261 events. 2655/4261 cut-off events. For 224914/224916 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24712 event pairs, 666 based on Foata normal form. 4/4264 useless extension candidates. Maximal degree in co-relation 26566. Up to 3732 conditions per place. [2024-06-28 04:27:23,698 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 197 selfloop transitions, 89 changer transitions 0/291 dead transitions. [2024-06-28 04:27:23,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 291 transitions, 3976 flow [2024-06-28 04:27:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:27:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:27:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 04:27:23,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:27:23,713 INFO L175 Difference]: Start difference. First operand has 195 places, 256 transitions, 2825 flow. Second operand 7 states and 126 transitions. [2024-06-28 04:27:23,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 291 transitions, 3976 flow [2024-06-28 04:27:23,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 291 transitions, 3818 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-28 04:27:23,953 INFO L231 Difference]: Finished difference. Result has 199 places, 267 transitions, 3082 flow [2024-06-28 04:27:23,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3082, PETRI_PLACES=199, PETRI_TRANSITIONS=267} [2024-06-28 04:27:23,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-28 04:27:23,953 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 267 transitions, 3082 flow [2024-06-28 04:27:23,953 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 04:27:23,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:23,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:23,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:27:23,954 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 04:27:23,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:23,954 INFO L85 PathProgramCache]: Analyzing trace with hash 621474200, now seen corresponding path program 6 times [2024-06-28 04:27:23,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:23,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085633219] [2024-06-28 04:27:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:23,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:26,109 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 04:27:26,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:26,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085633219] [2024-06-28 04:27:26,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085633219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:26,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:26,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:27:26,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688883510] [2024-06-28 04:27:26,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:26,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:27:26,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:26,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:27:26,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:27:26,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:26,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 267 transitions, 3082 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 04:27:26,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:26,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:26,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:27,606 INFO L124 PetriNetUnfolderBase]: 2660/4270 cut-off events. [2024-06-28 04:27:27,606 INFO L125 PetriNetUnfolderBase]: For 224250/224252 co-relation queries the response was YES. [2024-06-28 04:27:27,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26847 conditions, 4270 events. 2660/4270 cut-off events. For 224250/224252 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 24772 event pairs, 665 based on Foata normal form. 3/4272 useless extension candidates. Maximal degree in co-relation 26750. Up to 3736 conditions per place. [2024-06-28 04:27:27,643 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 190 selfloop transitions, 95 changer transitions 0/290 dead transitions. [2024-06-28 04:27:27,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 290 transitions, 4004 flow [2024-06-28 04:27:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:27:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:27:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:27:27,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-28 04:27:27,645 INFO L175 Difference]: Start difference. First operand has 199 places, 267 transitions, 3082 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:27:27,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 290 transitions, 4004 flow [2024-06-28 04:27:28,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 290 transitions, 3914 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-06-28 04:27:28,022 INFO L231 Difference]: Finished difference. Result has 205 places, 271 transitions, 3266 flow [2024-06-28 04:27:28,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3006, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3266, PETRI_PLACES=205, PETRI_TRANSITIONS=271} [2024-06-28 04:27:28,023 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-28 04:27:28,023 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 271 transitions, 3266 flow [2024-06-28 04:27:28,023 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 04:27:28,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:28,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:28,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:27:28,024 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 04:27:28,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1629311206, now seen corresponding path program 7 times [2024-06-28 04:27:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:28,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972739829] [2024-06-28 04:27:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:28,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:30,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:30,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972739829] [2024-06-28 04:27:30,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972739829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:30,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:30,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:27:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052769710] [2024-06-28 04:27:30,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:30,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:27:30,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:27:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:27:30,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:30,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 271 transitions, 3266 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 04:27:30,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:30,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:30,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:31,687 INFO L124 PetriNetUnfolderBase]: 2694/4301 cut-off events. [2024-06-28 04:27:31,687 INFO L125 PetriNetUnfolderBase]: For 237788/237788 co-relation queries the response was YES. [2024-06-28 04:27:31,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27691 conditions, 4301 events. 2694/4301 cut-off events. For 237788/237788 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24887 event pairs, 700 based on Foata normal form. 2/4300 useless extension candidates. Maximal degree in co-relation 27591. Up to 3952 conditions per place. [2024-06-28 04:27:31,729 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 82 changer transitions 0/301 dead transitions. [2024-06-28 04:27:31,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 301 transitions, 4329 flow [2024-06-28 04:27:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:31,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 04:27:31,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-28 04:27:31,731 INFO L175 Difference]: Start difference. First operand has 205 places, 271 transitions, 3266 flow. Second operand 9 states and 147 transitions. [2024-06-28 04:27:31,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 301 transitions, 4329 flow [2024-06-28 04:27:32,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 301 transitions, 4131 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-28 04:27:32,068 INFO L231 Difference]: Finished difference. Result has 213 places, 281 transitions, 3458 flow [2024-06-28 04:27:32,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3458, PETRI_PLACES=213, PETRI_TRANSITIONS=281} [2024-06-28 04:27:32,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-28 04:27:32,069 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 281 transitions, 3458 flow [2024-06-28 04:27:32,069 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 04:27:32,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:32,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:32,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 04:27:32,069 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 04:27:32,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:32,070 INFO L85 PathProgramCache]: Analyzing trace with hash -895189132, now seen corresponding path program 8 times [2024-06-28 04:27:32,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:32,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84766901] [2024-06-28 04:27:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:32,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:34,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:34,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84766901] [2024-06-28 04:27:34,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84766901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:34,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:34,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:27:34,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015953128] [2024-06-28 04:27:34,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:34,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:27:34,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:34,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:27:34,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:27:34,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:34,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 281 transitions, 3458 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 04:27:34,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:34,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:34,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:35,511 INFO L124 PetriNetUnfolderBase]: 2691/4293 cut-off events. [2024-06-28 04:27:35,511 INFO L125 PetriNetUnfolderBase]: For 245039/245039 co-relation queries the response was YES. [2024-06-28 04:27:35,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28220 conditions, 4293 events. 2691/4293 cut-off events. For 245039/245039 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24847 event pairs, 693 based on Foata normal form. 1/4291 useless extension candidates. Maximal degree in co-relation 28117. Up to 3950 conditions per place. [2024-06-28 04:27:35,557 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 206 selfloop transitions, 86 changer transitions 0/297 dead transitions. [2024-06-28 04:27:35,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 297 transitions, 4228 flow [2024-06-28 04:27:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 04:27:35,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-28 04:27:35,559 INFO L175 Difference]: Start difference. First operand has 213 places, 281 transitions, 3458 flow. Second operand 8 states and 130 transitions. [2024-06-28 04:27:35,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 297 transitions, 4228 flow [2024-06-28 04:27:35,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 297 transitions, 3996 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:35,846 INFO L231 Difference]: Finished difference. Result has 216 places, 281 transitions, 3406 flow [2024-06-28 04:27:35,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3228, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3406, PETRI_PLACES=216, PETRI_TRANSITIONS=281} [2024-06-28 04:27:35,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-28 04:27:35,847 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 281 transitions, 3406 flow [2024-06-28 04:27:35,847 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 04:27:35,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:35,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:35,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 04:27:35,848 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 04:27:35,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1179229904, now seen corresponding path program 1 times [2024-06-28 04:27:35,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:35,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28706960] [2024-06-28 04:27:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:35,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:37,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:37,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28706960] [2024-06-28 04:27:37,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28706960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:37,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:37,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:27:37,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845875352] [2024-06-28 04:27:37,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:37,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:27:37,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:37,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:27:37,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:27:37,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:37,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 281 transitions, 3406 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:37,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:37,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:37,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:39,319 INFO L124 PetriNetUnfolderBase]: 2717/4361 cut-off events. [2024-06-28 04:27:39,319 INFO L125 PetriNetUnfolderBase]: For 249074/249082 co-relation queries the response was YES. [2024-06-28 04:27:39,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28226 conditions, 4361 events. 2717/4361 cut-off events. For 249074/249082 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25402 event pairs, 633 based on Foata normal form. 10/4371 useless extension candidates. Maximal degree in co-relation 28122. Up to 3801 conditions per place. [2024-06-28 04:27:39,357 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 226 selfloop transitions, 94 changer transitions 0/325 dead transitions. [2024-06-28 04:27:39,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 325 transitions, 4582 flow [2024-06-28 04:27:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 04:27:39,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 04:27:39,359 INFO L175 Difference]: Start difference. First operand has 216 places, 281 transitions, 3406 flow. Second operand 8 states and 156 transitions. [2024-06-28 04:27:39,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 325 transitions, 4582 flow [2024-06-28 04:27:39,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 325 transitions, 4455 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:39,608 INFO L231 Difference]: Finished difference. Result has 220 places, 289 transitions, 3616 flow [2024-06-28 04:27:39,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3279, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3616, PETRI_PLACES=220, PETRI_TRANSITIONS=289} [2024-06-28 04:27:39,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-28 04:27:39,609 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 289 transitions, 3616 flow [2024-06-28 04:27:39,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:39,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:39,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:39,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 04:27:39,610 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 04:27:39,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:39,610 INFO L85 PathProgramCache]: Analyzing trace with hash 578225110, now seen corresponding path program 2 times [2024-06-28 04:27:39,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:39,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251389074] [2024-06-28 04:27:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:39,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:41,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:41,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251389074] [2024-06-28 04:27:41,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251389074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:41,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:41,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:27:41,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718881312] [2024-06-28 04:27:41,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:41,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:27:41,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:41,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:27:41,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:27:41,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:41,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 289 transitions, 3616 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 04:27:41,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:41,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:41,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:43,510 INFO L124 PetriNetUnfolderBase]: 2727/4374 cut-off events. [2024-06-28 04:27:43,510 INFO L125 PetriNetUnfolderBase]: For 258451/258453 co-relation queries the response was YES. [2024-06-28 04:27:43,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28761 conditions, 4374 events. 2727/4374 cut-off events. For 258451/258453 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25432 event pairs, 650 based on Foata normal form. 4/4378 useless extension candidates. Maximal degree in co-relation 28655. Up to 3811 conditions per place. [2024-06-28 04:27:43,553 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 225 selfloop transitions, 97 changer transitions 0/327 dead transitions. [2024-06-28 04:27:43,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 327 transitions, 4631 flow [2024-06-28 04:27:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 04:27:43,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-28 04:27:43,554 INFO L175 Difference]: Start difference. First operand has 220 places, 289 transitions, 3616 flow. Second operand 9 states and 166 transitions. [2024-06-28 04:27:43,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 327 transitions, 4631 flow [2024-06-28 04:27:43,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 327 transitions, 4461 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 04:27:43,873 INFO L231 Difference]: Finished difference. Result has 225 places, 292 transitions, 3697 flow [2024-06-28 04:27:43,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3451, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3697, PETRI_PLACES=225, PETRI_TRANSITIONS=292} [2024-06-28 04:27:43,873 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-28 04:27:43,873 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 292 transitions, 3697 flow [2024-06-28 04:27:43,873 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 04:27:43,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:43,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:43,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 04:27:43,874 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 04:27:43,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1355617348, now seen corresponding path program 1 times [2024-06-28 04:27:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:43,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605872119] [2024-06-28 04:27:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:43,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:46,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:46,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605872119] [2024-06-28 04:27:46,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605872119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:46,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:46,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:27:46,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827645185] [2024-06-28 04:27:46,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:46,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:27:46,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:46,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:27:46,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:27:46,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:46,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 292 transitions, 3697 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 04:27:46,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:46,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:46,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:47,845 INFO L124 PetriNetUnfolderBase]: 2801/4476 cut-off events. [2024-06-28 04:27:47,845 INFO L125 PetriNetUnfolderBase]: For 282292/282294 co-relation queries the response was YES. [2024-06-28 04:27:47,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30010 conditions, 4476 events. 2801/4476 cut-off events. For 282292/282294 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 26006 event pairs, 697 based on Foata normal form. 4/4480 useless extension candidates. Maximal degree in co-relation 29903. Up to 3600 conditions per place. [2024-06-28 04:27:47,891 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 246 selfloop transitions, 105 changer transitions 0/356 dead transitions. [2024-06-28 04:27:47,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 356 transitions, 5169 flow [2024-06-28 04:27:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 04:27:47,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-28 04:27:47,893 INFO L175 Difference]: Start difference. First operand has 225 places, 292 transitions, 3697 flow. Second operand 9 states and 175 transitions. [2024-06-28 04:27:47,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 356 transitions, 5169 flow [2024-06-28 04:27:48,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 356 transitions, 4959 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 04:27:48,240 INFO L231 Difference]: Finished difference. Result has 230 places, 311 transitions, 4050 flow [2024-06-28 04:27:48,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4050, PETRI_PLACES=230, PETRI_TRANSITIONS=311} [2024-06-28 04:27:48,241 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-28 04:27:48,242 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 311 transitions, 4050 flow [2024-06-28 04:27:48,242 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 04:27:48,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:48,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:48,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 04:27:48,242 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 04:27:48,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:48,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1089406202, now seen corresponding path program 3 times [2024-06-28 04:27:48,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:48,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768803863] [2024-06-28 04:27:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:48,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:50,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:50,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768803863] [2024-06-28 04:27:50,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768803863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:50,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:50,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:27:50,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557890369] [2024-06-28 04:27:50,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:50,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:27:50,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:50,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:27:50,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:27:50,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:50,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 311 transitions, 4050 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:50,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:50,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:50,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:51,625 INFO L124 PetriNetUnfolderBase]: 2789/4445 cut-off events. [2024-06-28 04:27:51,625 INFO L125 PetriNetUnfolderBase]: For 291321/291321 co-relation queries the response was YES. [2024-06-28 04:27:51,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30685 conditions, 4445 events. 2789/4445 cut-off events. For 291321/291321 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25820 event pairs, 700 based on Foata normal form. 4/4449 useless extension candidates. Maximal degree in co-relation 30574. Up to 4158 conditions per place. [2024-06-28 04:27:51,674 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 276 selfloop transitions, 58 changer transitions 0/339 dead transitions. [2024-06-28 04:27:51,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 339 transitions, 4836 flow [2024-06-28 04:27:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 04:27:51,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-28 04:27:51,678 INFO L175 Difference]: Start difference. First operand has 230 places, 311 transitions, 4050 flow. Second operand 9 states and 154 transitions. [2024-06-28 04:27:51,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 339 transitions, 4836 flow [2024-06-28 04:27:52,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 339 transitions, 4697 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-28 04:27:52,069 INFO L231 Difference]: Finished difference. Result has 235 places, 311 transitions, 4037 flow [2024-06-28 04:27:52,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3911, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4037, PETRI_PLACES=235, PETRI_TRANSITIONS=311} [2024-06-28 04:27:52,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-28 04:27:52,069 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 311 transitions, 4037 flow [2024-06-28 04:27:52,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:52,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:52,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:52,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 04:27:52,070 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 04:27:52,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:52,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1350975718, now seen corresponding path program 2 times [2024-06-28 04:27:52,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:52,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373749302] [2024-06-28 04:27:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:52,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:54,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:54,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373749302] [2024-06-28 04:27:54,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373749302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:54,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:54,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:27:54,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116945524] [2024-06-28 04:27:54,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:54,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:27:54,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:54,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:27:54,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:27:54,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:54,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 311 transitions, 4037 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 04:27:54,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:54,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:54,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:55,698 INFO L124 PetriNetUnfolderBase]: 2889/4575 cut-off events. [2024-06-28 04:27:55,698 INFO L125 PetriNetUnfolderBase]: For 317180/317180 co-relation queries the response was YES. [2024-06-28 04:27:55,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32082 conditions, 4575 events. 2889/4575 cut-off events. For 317180/317180 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 26441 event pairs, 699 based on Foata normal form. 4/4579 useless extension candidates. Maximal degree in co-relation 31970. Up to 4100 conditions per place. [2024-06-28 04:27:55,746 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 270 selfloop transitions, 90 changer transitions 0/365 dead transitions. [2024-06-28 04:27:55,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 365 transitions, 5410 flow [2024-06-28 04:27:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:27:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:27:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-28 04:27:55,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:27:55,748 INFO L175 Difference]: Start difference. First operand has 235 places, 311 transitions, 4037 flow. Second operand 10 states and 180 transitions. [2024-06-28 04:27:55,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 365 transitions, 5410 flow [2024-06-28 04:27:56,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 365 transitions, 5318 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 04:27:56,131 INFO L231 Difference]: Finished difference. Result has 240 places, 326 transitions, 4420 flow [2024-06-28 04:27:56,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3945, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4420, PETRI_PLACES=240, PETRI_TRANSITIONS=326} [2024-06-28 04:27:56,132 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-28 04:27:56,132 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 326 transitions, 4420 flow [2024-06-28 04:27:56,132 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 04:27:56,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:56,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:27:56,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 04:27:56,133 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 04:27:56,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:56,133 INFO L85 PathProgramCache]: Analyzing trace with hash 409515008, now seen corresponding path program 3 times [2024-06-28 04:27:56,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:56,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267320040] [2024-06-28 04:27:56,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:56,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:58,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:58,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267320040] [2024-06-28 04:27:58,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267320040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:58,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:58,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:27:58,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277375727] [2024-06-28 04:27:58,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:58,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:27:58,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:27:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:27:58,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:58,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 326 transitions, 4420 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 04:27:58,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:58,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:58,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:00,000 INFO L124 PetriNetUnfolderBase]: 2877/4559 cut-off events. [2024-06-28 04:28:00,000 INFO L125 PetriNetUnfolderBase]: For 322958/322958 co-relation queries the response was YES. [2024-06-28 04:28:00,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32619 conditions, 4559 events. 2877/4559 cut-off events. For 322958/322958 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 26344 event pairs, 701 based on Foata normal form. 4/4563 useless extension candidates. Maximal degree in co-relation 32505. Up to 4094 conditions per place. [2024-06-28 04:28:00,053 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 268 selfloop transitions, 92 changer transitions 0/365 dead transitions. [2024-06-28 04:28:00,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 365 transitions, 5424 flow [2024-06-28 04:28:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:28:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:28:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-28 04:28:00,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40380549682875266 [2024-06-28 04:28:00,054 INFO L175 Difference]: Start difference. First operand has 240 places, 326 transitions, 4420 flow. Second operand 11 states and 191 transitions. [2024-06-28 04:28:00,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 365 transitions, 5424 flow [2024-06-28 04:28:00,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 365 transitions, 5175 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-28 04:28:00,572 INFO L231 Difference]: Finished difference. Result has 247 places, 326 transitions, 4367 flow [2024-06-28 04:28:00,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4171, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4367, PETRI_PLACES=247, PETRI_TRANSITIONS=326} [2024-06-28 04:28:00,573 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-28 04:28:00,573 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 326 transitions, 4367 flow [2024-06-28 04:28:00,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:00,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:00,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:00,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 04:28:00,574 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 04:28:00,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:00,574 INFO L85 PathProgramCache]: Analyzing trace with hash 409523936, now seen corresponding path program 1 times [2024-06-28 04:28:00,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:00,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219290881] [2024-06-28 04:28:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:00,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:03,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:03,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219290881] [2024-06-28 04:28:03,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219290881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:03,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:03,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:03,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996083038] [2024-06-28 04:28:03,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:03,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:03,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:03,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:03,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:03,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:03,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 326 transitions, 4367 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:03,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:03,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:03,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:05,419 INFO L124 PetriNetUnfolderBase]: 2921/4627 cut-off events. [2024-06-28 04:28:05,419 INFO L125 PetriNetUnfolderBase]: For 347631/347631 co-relation queries the response was YES. [2024-06-28 04:28:05,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33058 conditions, 4627 events. 2921/4627 cut-off events. For 347631/347631 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26826 event pairs, 709 based on Foata normal form. 12/4639 useless extension candidates. Maximal degree in co-relation 32942. Up to 4224 conditions per place. [2024-06-28 04:28:05,466 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 293 selfloop transitions, 67 changer transitions 0/365 dead transitions. [2024-06-28 04:28:05,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 365 transitions, 5297 flow [2024-06-28 04:28:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 04:28:05,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-28 04:28:05,468 INFO L175 Difference]: Start difference. First operand has 247 places, 326 transitions, 4367 flow. Second operand 9 states and 161 transitions. [2024-06-28 04:28:05,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 365 transitions, 5297 flow [2024-06-28 04:28:06,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 365 transitions, 5083 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-28 04:28:06,010 INFO L231 Difference]: Finished difference. Result has 247 places, 327 transitions, 4314 flow [2024-06-28 04:28:06,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4153, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4314, PETRI_PLACES=247, PETRI_TRANSITIONS=327} [2024-06-28 04:28:06,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-28 04:28:06,010 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 327 transitions, 4314 flow [2024-06-28 04:28:06,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:06,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:06,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:06,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 04:28:06,011 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 04:28:06,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:06,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1763409330, now seen corresponding path program 4 times [2024-06-28 04:28:06,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:06,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410127836] [2024-06-28 04:28:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:06,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:08,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:08,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410127836] [2024-06-28 04:28:08,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410127836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:08,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:08,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:28:08,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811216054] [2024-06-28 04:28:08,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:08,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:28:08,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:08,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:28:08,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:28:08,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:08,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 327 transitions, 4314 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:08,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:08,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:08,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:09,750 INFO L124 PetriNetUnfolderBase]: 2973/4719 cut-off events. [2024-06-28 04:28:09,750 INFO L125 PetriNetUnfolderBase]: For 352422/352430 co-relation queries the response was YES. [2024-06-28 04:28:09,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33965 conditions, 4719 events. 2973/4719 cut-off events. For 352422/352430 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27377 event pairs, 658 based on Foata normal form. 12/4731 useless extension candidates. Maximal degree in co-relation 33848. Up to 4140 conditions per place. [2024-06-28 04:28:09,799 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 247 selfloop transitions, 116 changer transitions 0/368 dead transitions. [2024-06-28 04:28:09,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 368 transitions, 5600 flow [2024-06-28 04:28:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:28:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:28:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 04:28:09,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 04:28:09,801 INFO L175 Difference]: Start difference. First operand has 247 places, 327 transitions, 4314 flow. Second operand 7 states and 133 transitions. [2024-06-28 04:28:09,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 368 transitions, 5600 flow [2024-06-28 04:28:10,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 368 transitions, 5467 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:28:10,251 INFO L231 Difference]: Finished difference. Result has 247 places, 339 transitions, 4643 flow [2024-06-28 04:28:10,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4181, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4643, PETRI_PLACES=247, PETRI_TRANSITIONS=339} [2024-06-28 04:28:10,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-28 04:28:10,252 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 339 transitions, 4643 flow [2024-06-28 04:28:10,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:10,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:10,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:10,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 04:28:10,252 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 04:28:10,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:10,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1763289360, now seen corresponding path program 5 times [2024-06-28 04:28:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:10,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232305709] [2024-06-28 04:28:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:10,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:12,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:12,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232305709] [2024-06-28 04:28:12,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232305709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:12,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:12,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:12,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949441869] [2024-06-28 04:28:12,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:12,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:12,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:12,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:12,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:12,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:12,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 339 transitions, 4643 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:12,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:12,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:12,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:14,760 INFO L124 PetriNetUnfolderBase]: 2993/4752 cut-off events. [2024-06-28 04:28:14,761 INFO L125 PetriNetUnfolderBase]: For 363772/363774 co-relation queries the response was YES. [2024-06-28 04:28:14,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34593 conditions, 4752 events. 2993/4752 cut-off events. For 363772/363774 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27595 event pairs, 677 based on Foata normal form. 6/4758 useless extension candidates. Maximal degree in co-relation 34475. Up to 4160 conditions per place. [2024-06-28 04:28:14,813 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 245 selfloop transitions, 123 changer transitions 0/373 dead transitions. [2024-06-28 04:28:14,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 373 transitions, 5720 flow [2024-06-28 04:28:14,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:14,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:28:14,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-28 04:28:14,815 INFO L175 Difference]: Start difference. First operand has 247 places, 339 transitions, 4643 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:28:14,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 373 transitions, 5720 flow [2024-06-28 04:28:15,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 373 transitions, 5551 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 04:28:15,349 INFO L231 Difference]: Finished difference. Result has 251 places, 345 transitions, 4857 flow [2024-06-28 04:28:15,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4484, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4857, PETRI_PLACES=251, PETRI_TRANSITIONS=345} [2024-06-28 04:28:15,357 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-28 04:28:15,357 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 345 transitions, 4857 flow [2024-06-28 04:28:15,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:15,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:15,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:15,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 04:28:15,357 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 04:28:15,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:15,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1763289174, now seen corresponding path program 4 times [2024-06-28 04:28:15,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:15,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114148511] [2024-06-28 04:28:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:15,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:17,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:17,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114148511] [2024-06-28 04:28:17,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114148511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:17,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:17,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:17,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557226983] [2024-06-28 04:28:17,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:17,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:17,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:17,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:17,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:17,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 345 transitions, 4857 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:17,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:17,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:17,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:19,561 INFO L124 PetriNetUnfolderBase]: 3029/4802 cut-off events. [2024-06-28 04:28:19,561 INFO L125 PetriNetUnfolderBase]: For 372711/372713 co-relation queries the response was YES. [2024-06-28 04:28:19,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35255 conditions, 4802 events. 3029/4802 cut-off events. For 372711/372713 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27884 event pairs, 724 based on Foata normal form. 6/4808 useless extension candidates. Maximal degree in co-relation 35137. Up to 3819 conditions per place. [2024-06-28 04:28:19,615 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 240 selfloop transitions, 144 changer transitions 0/389 dead transitions. [2024-06-28 04:28:19,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 389 transitions, 6209 flow [2024-06-28 04:28:19,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 04:28:19,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 04:28:19,616 INFO L175 Difference]: Start difference. First operand has 251 places, 345 transitions, 4857 flow. Second operand 8 states and 150 transitions. [2024-06-28 04:28:19,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 389 transitions, 6209 flow [2024-06-28 04:28:20,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 389 transitions, 5915 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-28 04:28:20,071 INFO L231 Difference]: Finished difference. Result has 254 places, 356 transitions, 5204 flow [2024-06-28 04:28:20,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5204, PETRI_PLACES=254, PETRI_TRANSITIONS=356} [2024-06-28 04:28:20,072 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-28 04:28:20,072 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 356 transitions, 5204 flow [2024-06-28 04:28:20,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:20,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:20,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:20,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 04:28:20,073 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 04:28:20,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:20,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1586157654, now seen corresponding path program 5 times [2024-06-28 04:28:20,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:20,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629513769] [2024-06-28 04:28:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:20,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:22,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:22,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629513769] [2024-06-28 04:28:22,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629513769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:22,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:22,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:22,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576565735] [2024-06-28 04:28:22,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:22,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:22,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:22,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:22,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:22,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 356 transitions, 5204 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:22,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:22,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:22,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:24,420 INFO L124 PetriNetUnfolderBase]: 3145/4945 cut-off events. [2024-06-28 04:28:24,420 INFO L125 PetriNetUnfolderBase]: For 400716/400716 co-relation queries the response was YES. [2024-06-28 04:28:24,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38031 conditions, 4945 events. 3145/4945 cut-off events. For 400716/400716 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28551 event pairs, 719 based on Foata normal form. 4/4949 useless extension candidates. Maximal degree in co-relation 37911. Up to 4342 conditions per place. [2024-06-28 04:28:24,469 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 285 selfloop transitions, 119 changer transitions 0/409 dead transitions. [2024-06-28 04:28:24,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 409 transitions, 6850 flow [2024-06-28 04:28:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 04:28:24,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-28 04:28:24,471 INFO L175 Difference]: Start difference. First operand has 254 places, 356 transitions, 5204 flow. Second operand 9 states and 161 transitions. [2024-06-28 04:28:24,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 409 transitions, 6850 flow [2024-06-28 04:28:25,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 409 transitions, 6610 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-28 04:28:25,032 INFO L231 Difference]: Finished difference. Result has 260 places, 374 transitions, 5662 flow [2024-06-28 04:28:25,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4989, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5662, PETRI_PLACES=260, PETRI_TRANSITIONS=374} [2024-06-28 04:28:25,033 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-28 04:28:25,033 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 374 transitions, 5662 flow [2024-06-28 04:28:25,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:25,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:25,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:25,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 04:28:25,034 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 04:28:25,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:25,034 INFO L85 PathProgramCache]: Analyzing trace with hash -387412460, now seen corresponding path program 6 times [2024-06-28 04:28:25,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:25,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553669649] [2024-06-28 04:28:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:25,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:27,145 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 04:28:27,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:27,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553669649] [2024-06-28 04:28:27,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553669649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:27,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:27,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:28:27,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232163592] [2024-06-28 04:28:27,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:27,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:28:27,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:27,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:28:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:28:27,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:27,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 374 transitions, 5662 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:27,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:27,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:27,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:29,002 INFO L124 PetriNetUnfolderBase]: 3133/4925 cut-off events. [2024-06-28 04:28:29,003 INFO L125 PetriNetUnfolderBase]: For 408456/408456 co-relation queries the response was YES. [2024-06-28 04:28:29,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38224 conditions, 4925 events. 3133/4925 cut-off events. For 408456/408456 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28527 event pairs, 762 based on Foata normal form. 4/4929 useless extension candidates. Maximal degree in co-relation 38102. Up to 4624 conditions per place. [2024-06-28 04:28:29,054 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 324 selfloop transitions, 68 changer transitions 0/397 dead transitions. [2024-06-28 04:28:29,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 397 transitions, 6577 flow [2024-06-28 04:28:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:28:29,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-28 04:28:29,055 INFO L175 Difference]: Start difference. First operand has 260 places, 374 transitions, 5662 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:28:29,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 397 transitions, 6577 flow [2024-06-28 04:28:29,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 397 transitions, 6345 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-28 04:28:29,642 INFO L231 Difference]: Finished difference. Result has 263 places, 374 transitions, 5584 flow [2024-06-28 04:28:29,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5430, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5584, PETRI_PLACES=263, PETRI_TRANSITIONS=374} [2024-06-28 04:28:29,642 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-28 04:28:29,643 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 374 transitions, 5584 flow [2024-06-28 04:28:29,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:29,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:29,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:29,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 04:28:29,643 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 04:28:29,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:29,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1585920504, now seen corresponding path program 6 times [2024-06-28 04:28:29,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:29,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789950813] [2024-06-28 04:28:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:29,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:32,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:32,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789950813] [2024-06-28 04:28:32,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789950813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:32,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:32,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:32,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321031141] [2024-06-28 04:28:32,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:32,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:32,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:32,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:32,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:32,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 374 transitions, 5584 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:32,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:32,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:32,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:34,205 INFO L124 PetriNetUnfolderBase]: 3121/4911 cut-off events. [2024-06-28 04:28:34,205 INFO L125 PetriNetUnfolderBase]: For 394054/394054 co-relation queries the response was YES. [2024-06-28 04:28:34,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37361 conditions, 4911 events. 3121/4911 cut-off events. For 394054/394054 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28405 event pairs, 721 based on Foata normal form. 4/4915 useless extension candidates. Maximal degree in co-relation 37238. Up to 4330 conditions per place. [2024-06-28 04:28:34,261 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 283 selfloop transitions, 121 changer transitions 0/409 dead transitions. [2024-06-28 04:28:34,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 409 transitions, 6720 flow [2024-06-28 04:28:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:28:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:28:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-28 04:28:34,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 04:28:34,262 INFO L175 Difference]: Start difference. First operand has 263 places, 374 transitions, 5584 flow. Second operand 10 states and 172 transitions. [2024-06-28 04:28:34,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 409 transitions, 6720 flow [2024-06-28 04:28:35,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 409 transitions, 6524 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-28 04:28:35,005 INFO L231 Difference]: Finished difference. Result has 266 places, 374 transitions, 5652 flow [2024-06-28 04:28:35,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5390, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5652, PETRI_PLACES=266, PETRI_TRANSITIONS=374} [2024-06-28 04:28:35,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-28 04:28:35,007 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 374 transitions, 5652 flow [2024-06-28 04:28:35,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:35,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:35,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:35,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 04:28:35,008 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 04:28:35,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1585911576, now seen corresponding path program 2 times [2024-06-28 04:28:35,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:35,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962777534] [2024-06-28 04:28:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:35,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:38,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:38,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962777534] [2024-06-28 04:28:38,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962777534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:38,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:38,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:38,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870426826] [2024-06-28 04:28:38,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:38,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:38,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:38,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:38,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:38,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 374 transitions, 5652 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:38,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:38,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:38,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:39,985 INFO L124 PetriNetUnfolderBase]: 3165/4981 cut-off events. [2024-06-28 04:28:39,986 INFO L125 PetriNetUnfolderBase]: For 412807/412807 co-relation queries the response was YES. [2024-06-28 04:28:40,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37895 conditions, 4981 events. 3165/4981 cut-off events. For 412807/412807 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28914 event pairs, 731 based on Foata normal form. 12/4993 useless extension candidates. Maximal degree in co-relation 37772. Up to 4518 conditions per place. [2024-06-28 04:28:40,041 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 333 selfloop transitions, 71 changer transitions 0/409 dead transitions. [2024-06-28 04:28:40,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 409 transitions, 6708 flow [2024-06-28 04:28:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:28:40,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-28 04:28:40,042 INFO L175 Difference]: Start difference. First operand has 266 places, 374 transitions, 5652 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:28:40,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 409 transitions, 6708 flow [2024-06-28 04:28:40,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 409 transitions, 6434 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-28 04:28:40,690 INFO L231 Difference]: Finished difference. Result has 265 places, 375 transitions, 5553 flow [2024-06-28 04:28:40,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5378, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5553, PETRI_PLACES=265, PETRI_TRANSITIONS=375} [2024-06-28 04:28:40,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-28 04:28:40,691 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 375 transitions, 5553 flow [2024-06-28 04:28:40,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:40,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:40,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 04:28:40,692 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 04:28:40,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:40,692 INFO L85 PathProgramCache]: Analyzing trace with hash -481448596, now seen corresponding path program 7 times [2024-06-28 04:28:40,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:40,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064166859] [2024-06-28 04:28:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:42,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:42,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064166859] [2024-06-28 04:28:42,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064166859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:42,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:42,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:28:42,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130669452] [2024-06-28 04:28:42,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:42,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:28:42,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:42,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:28:42,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:28:42,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:42,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 375 transitions, 5553 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:42,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:42,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:42,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:44,551 INFO L124 PetriNetUnfolderBase]: 3169/5000 cut-off events. [2024-06-28 04:28:44,551 INFO L125 PetriNetUnfolderBase]: For 394260/394270 co-relation queries the response was YES. [2024-06-28 04:28:44,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37673 conditions, 5000 events. 3169/5000 cut-off events. For 394260/394270 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 29093 event pairs, 698 based on Foata normal form. 14/5013 useless extension candidates. Maximal degree in co-relation 37550. Up to 4414 conditions per place. [2024-06-28 04:28:44,606 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 277 selfloop transitions, 123 changer transitions 0/405 dead transitions. [2024-06-28 04:28:44,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 405 transitions, 6815 flow [2024-06-28 04:28:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:28:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:28:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 04:28:44,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-28 04:28:44,607 INFO L175 Difference]: Start difference. First operand has 265 places, 375 transitions, 5553 flow. Second operand 7 states and 127 transitions. [2024-06-28 04:28:44,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 405 transitions, 6815 flow [2024-06-28 04:28:45,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 405 transitions, 6658 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 04:28:45,170 INFO L231 Difference]: Finished difference. Result has 266 places, 380 transitions, 5764 flow [2024-06-28 04:28:45,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5406, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5764, PETRI_PLACES=266, PETRI_TRANSITIONS=380} [2024-06-28 04:28:45,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-28 04:28:45,171 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 380 transitions, 5764 flow [2024-06-28 04:28:45,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:45,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:45,171 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] [2024-06-28 04:28:45,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 04:28:45,172 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 04:28:45,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:45,172 INFO L85 PathProgramCache]: Analyzing trace with hash 794504080, now seen corresponding path program 8 times [2024-06-28 04:28:45,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:45,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754588409] [2024-06-28 04:28:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:45,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:47,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:47,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754588409] [2024-06-28 04:28:47,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754588409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:47,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:47,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:28:47,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677188401] [2024-06-28 04:28:47,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:47,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:28:47,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:47,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:28:47,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:28:47,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:47,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 380 transitions, 5764 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:47,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:47,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:47,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:49,556 INFO L124 PetriNetUnfolderBase]: 3179/5008 cut-off events. [2024-06-28 04:28:49,556 INFO L125 PetriNetUnfolderBase]: For 392074/392084 co-relation queries the response was YES. [2024-06-28 04:28:49,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37917 conditions, 5008 events. 3179/5008 cut-off events. For 392074/392084 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29080 event pairs, 698 based on Foata normal form. 12/5019 useless extension candidates. Maximal degree in co-relation 37793. Up to 4424 conditions per place. [2024-06-28 04:28:49,613 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 271 selfloop transitions, 128 changer transitions 0/404 dead transitions. [2024-06-28 04:28:49,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 404 transitions, 6837 flow [2024-06-28 04:28:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:28:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:28:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 04:28:49,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-28 04:28:49,615 INFO L175 Difference]: Start difference. First operand has 266 places, 380 transitions, 5764 flow. Second operand 7 states and 122 transitions. [2024-06-28 04:28:49,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 404 transitions, 6837 flow [2024-06-28 04:28:50,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 404 transitions, 6695 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 04:28:50,196 INFO L231 Difference]: Finished difference. Result has 271 places, 384 transitions, 5961 flow [2024-06-28 04:28:50,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5630, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5961, PETRI_PLACES=271, PETRI_TRANSITIONS=384} [2024-06-28 04:28:50,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-28 04:28:50,197 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 384 transitions, 5961 flow [2024-06-28 04:28:50,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:50,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:50,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:50,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 04:28:50,198 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 04:28:50,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1157800004, now seen corresponding path program 7 times [2024-06-28 04:28:50,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:50,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959114135] [2024-06-28 04:28:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:50,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:52,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:52,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959114135] [2024-06-28 04:28:52,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959114135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:52,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:52,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:52,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027532576] [2024-06-28 04:28:52,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:52,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:52,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:52,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:52,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:52,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 384 transitions, 5961 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:52,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:52,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:52,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:54,573 INFO L124 PetriNetUnfolderBase]: 3183/5027 cut-off events. [2024-06-28 04:28:54,573 INFO L125 PetriNetUnfolderBase]: For 405876/405878 co-relation queries the response was YES. [2024-06-28 04:28:54,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38066 conditions, 5027 events. 3183/5027 cut-off events. For 405876/405878 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 29295 event pairs, 812 based on Foata normal form. 6/5032 useless extension candidates. Maximal degree in co-relation 37940. Up to 3996 conditions per place. [2024-06-28 04:28:54,631 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 248 selfloop transitions, 168 changer transitions 0/421 dead transitions. [2024-06-28 04:28:54,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 421 transitions, 7477 flow [2024-06-28 04:28:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:28:54,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-28 04:28:54,632 INFO L175 Difference]: Start difference. First operand has 271 places, 384 transitions, 5961 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:28:54,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 421 transitions, 7477 flow [2024-06-28 04:28:55,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 421 transitions, 7355 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 04:28:55,213 INFO L231 Difference]: Finished difference. Result has 277 places, 392 transitions, 6374 flow [2024-06-28 04:28:55,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6374, PETRI_PLACES=277, PETRI_TRANSITIONS=392} [2024-06-28 04:28:55,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-28 04:28:55,214 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 392 transitions, 6374 flow [2024-06-28 04:28:55,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:55,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:55,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:55,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 04:28:55,215 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 04:28:55,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:55,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1872667344, now seen corresponding path program 9 times [2024-06-28 04:28:55,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:55,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422892283] [2024-06-28 04:28:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:55,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:57,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:57,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422892283] [2024-06-28 04:28:57,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422892283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:57,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:57,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:57,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586959207] [2024-06-28 04:28:57,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:57,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:57,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:57,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:57,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:57,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:57,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 392 transitions, 6374 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:57,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:57,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:57,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:59,564 INFO L124 PetriNetUnfolderBase]: 3187/5029 cut-off events. [2024-06-28 04:28:59,564 INFO L125 PetriNetUnfolderBase]: For 417636/417638 co-relation queries the response was YES. [2024-06-28 04:28:59,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38508 conditions, 5029 events. 3187/5029 cut-off events. For 417636/417638 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 29307 event pairs, 761 based on Foata normal form. 6/5034 useless extension candidates. Maximal degree in co-relation 38380. Up to 4435 conditions per place. [2024-06-28 04:28:59,620 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 276 selfloop transitions, 138 changer transitions 0/419 dead transitions. [2024-06-28 04:28:59,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 419 transitions, 7502 flow [2024-06-28 04:28:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:28:59,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-28 04:28:59,622 INFO L175 Difference]: Start difference. First operand has 277 places, 392 transitions, 6374 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:28:59,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 419 transitions, 7502 flow [2024-06-28 04:29:00,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 419 transitions, 7318 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-28 04:29:00,219 INFO L231 Difference]: Finished difference. Result has 282 places, 395 transitions, 6548 flow [2024-06-28 04:29:00,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6190, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6548, PETRI_PLACES=282, PETRI_TRANSITIONS=395} [2024-06-28 04:29:00,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-28 04:29:00,220 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 395 transitions, 6548 flow [2024-06-28 04:29:00,220 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 04:29:00,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:00,221 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 04:29:00,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 04:29:00,221 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 04:29:00,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:00,221 INFO L85 PathProgramCache]: Analyzing trace with hash -362834510, now seen corresponding path program 8 times [2024-06-28 04:29:00,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:00,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598654758] [2024-06-28 04:29:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:00,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:02,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:02,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598654758] [2024-06-28 04:29:02,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598654758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:02,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:02,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:02,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975460912] [2024-06-28 04:29:02,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:02,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:02,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:02,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:02,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:02,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:02,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 395 transitions, 6548 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 04:29:02,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:02,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:02,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:04,891 INFO L124 PetriNetUnfolderBase]: 3197/5056 cut-off events. [2024-06-28 04:29:04,891 INFO L125 PetriNetUnfolderBase]: For 425322/425324 co-relation queries the response was YES. [2024-06-28 04:29:04,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38990 conditions, 5056 events. 3197/5056 cut-off events. For 425322/425324 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29763 event pairs, 1271 based on Foata normal form. 4/5060 useless extension candidates. Maximal degree in co-relation 38859. Up to 4717 conditions per place. [2024-06-28 04:29:04,945 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 370 selfloop transitions, 44 changer transitions 0/419 dead transitions. [2024-06-28 04:29:04,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 419 transitions, 7496 flow [2024-06-28 04:29:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:29:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:29:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:29:04,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-28 04:29:04,946 INFO L175 Difference]: Start difference. First operand has 282 places, 395 transitions, 6548 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:29:04,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 419 transitions, 7496 flow [2024-06-28 04:29:05,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 419 transitions, 7184 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 04:29:05,596 INFO L231 Difference]: Finished difference. Result has 284 places, 398 transitions, 6400 flow [2024-06-28 04:29:05,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6236, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6400, PETRI_PLACES=284, PETRI_TRANSITIONS=398} [2024-06-28 04:29:05,596 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-28 04:29:05,596 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 398 transitions, 6400 flow [2024-06-28 04:29:05,596 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 04:29:05,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:05,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:05,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 04:29:05,597 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 04:29:05,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:05,597 INFO L85 PathProgramCache]: Analyzing trace with hash 893074896, now seen corresponding path program 10 times [2024-06-28 04:29:05,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:05,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395403563] [2024-06-28 04:29:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:05,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:08,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:08,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395403563] [2024-06-28 04:29:08,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395403563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:08,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:08,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:08,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383943967] [2024-06-28 04:29:08,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:08,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:08,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:08,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:08,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:08,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:08,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 398 transitions, 6400 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 04:29:08,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:08,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:08,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:10,060 INFO L124 PetriNetUnfolderBase]: 3191/5035 cut-off events. [2024-06-28 04:29:10,061 INFO L125 PetriNetUnfolderBase]: For 427774/427776 co-relation queries the response was YES. [2024-06-28 04:29:10,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38562 conditions, 5035 events. 3191/5035 cut-off events. For 427774/427776 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29321 event pairs, 739 based on Foata normal form. 4/5038 useless extension candidates. Maximal degree in co-relation 38430. Up to 4444 conditions per place. [2024-06-28 04:29:10,126 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 275 selfloop transitions, 140 changer transitions 0/420 dead transitions. [2024-06-28 04:29:10,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 420 transitions, 7576 flow [2024-06-28 04:29:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:29:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:29:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:29:10,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:29:10,128 INFO L175 Difference]: Start difference. First operand has 284 places, 398 transitions, 6400 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:29:10,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 420 transitions, 7576 flow [2024-06-28 04:29:10,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 420 transitions, 7420 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 04:29:10,793 INFO L231 Difference]: Finished difference. Result has 286 places, 398 transitions, 6530 flow [2024-06-28 04:29:10,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6530, PETRI_PLACES=286, PETRI_TRANSITIONS=398} [2024-06-28 04:29:10,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-28 04:29:10,796 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 398 transitions, 6530 flow [2024-06-28 04:29:10,796 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 04:29:10,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:10,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:10,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 04:29:10,797 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 04:29:10,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:10,797 INFO L85 PathProgramCache]: Analyzing trace with hash -354044176, now seen corresponding path program 11 times [2024-06-28 04:29:10,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:10,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077598880] [2024-06-28 04:29:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:10,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:13,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077598880] [2024-06-28 04:29:13,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077598880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:13,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:13,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:13,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819287543] [2024-06-28 04:29:13,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:13,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:13,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:13,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:13,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 398 transitions, 6530 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 04:29:13,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:13,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:13,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:15,499 INFO L124 PetriNetUnfolderBase]: 3185/5027 cut-off events. [2024-06-28 04:29:15,499 INFO L125 PetriNetUnfolderBase]: For 434528/434530 co-relation queries the response was YES. [2024-06-28 04:29:15,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38598 conditions, 5027 events. 3185/5027 cut-off events. For 434528/434530 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29305 event pairs, 740 based on Foata normal form. 4/5030 useless extension candidates. Maximal degree in co-relation 38465. Up to 4439 conditions per place. [2024-06-28 04:29:15,561 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 276 selfloop transitions, 141 changer transitions 0/422 dead transitions. [2024-06-28 04:29:15,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 422 transitions, 7580 flow [2024-06-28 04:29:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:29:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:29:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-28 04:29:15,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-28 04:29:15,562 INFO L175 Difference]: Start difference. First operand has 286 places, 398 transitions, 6530 flow. Second operand 10 states and 160 transitions. [2024-06-28 04:29:15,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 422 transitions, 7580 flow [2024-06-28 04:29:16,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 422 transitions, 7335 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:16,357 INFO L231 Difference]: Finished difference. Result has 291 places, 398 transitions, 6573 flow [2024-06-28 04:29:16,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6285, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6573, PETRI_PLACES=291, PETRI_TRANSITIONS=398} [2024-06-28 04:29:16,358 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-28 04:29:16,358 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 398 transitions, 6573 flow [2024-06-28 04:29:16,358 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 04:29:16,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:16,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:16,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 04:29:16,359 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 04:29:16,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:16,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1533267886, now seen corresponding path program 9 times [2024-06-28 04:29:16,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:16,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228819094] [2024-06-28 04:29:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:16,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:19,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:19,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228819094] [2024-06-28 04:29:19,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228819094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:19,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:19,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:19,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929314187] [2024-06-28 04:29:19,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:19,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:19,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:19,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 398 transitions, 6573 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 04:29:19,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:19,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:19,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:21,052 INFO L124 PetriNetUnfolderBase]: 3195/5049 cut-off events. [2024-06-28 04:29:21,052 INFO L125 PetriNetUnfolderBase]: For 449477/449479 co-relation queries the response was YES. [2024-06-28 04:29:21,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38842 conditions, 5049 events. 3195/5049 cut-off events. For 449477/449479 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29529 event pairs, 808 based on Foata normal form. 4/5052 useless extension candidates. Maximal degree in co-relation 38708. Up to 4005 conditions per place. [2024-06-28 04:29:21,109 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 245 selfloop transitions, 176 changer transitions 0/426 dead transitions. [2024-06-28 04:29:21,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 426 transitions, 7845 flow [2024-06-28 04:29:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:29:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:29:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:29:21,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-28 04:29:21,110 INFO L175 Difference]: Start difference. First operand has 291 places, 398 transitions, 6573 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:29:21,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 426 transitions, 7845 flow [2024-06-28 04:29:21,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 426 transitions, 7638 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 04:29:21,887 INFO L231 Difference]: Finished difference. Result has 292 places, 401 transitions, 6794 flow [2024-06-28 04:29:21,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6366, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6794, PETRI_PLACES=292, PETRI_TRANSITIONS=401} [2024-06-28 04:29:21,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-28 04:29:21,887 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 401 transitions, 6794 flow [2024-06-28 04:29:21,887 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 04:29:21,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:21,888 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 04:29:21,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 04:29:21,888 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 04:29:21,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1158828090, now seen corresponding path program 10 times [2024-06-28 04:29:21,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:21,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41209519] [2024-06-28 04:29:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:21,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:24,486 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 04:29:24,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:24,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41209519] [2024-06-28 04:29:24,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41209519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:24,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:24,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:24,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808283508] [2024-06-28 04:29:24,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:24,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:24,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:24,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:24,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:24,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 401 transitions, 6794 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 04:29:24,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:24,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:24,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:26,356 INFO L124 PetriNetUnfolderBase]: 3407/5323 cut-off events. [2024-06-28 04:29:26,357 INFO L125 PetriNetUnfolderBase]: For 528806/528806 co-relation queries the response was YES. [2024-06-28 04:29:26,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43341 conditions, 5323 events. 3407/5323 cut-off events. For 528806/528806 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 30932 event pairs, 744 based on Foata normal form. 4/5324 useless extension candidates. Maximal degree in co-relation 43205. Up to 4429 conditions per place. [2024-06-28 04:29:26,426 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 302 selfloop transitions, 153 changer transitions 0/460 dead transitions. [2024-06-28 04:29:26,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 460 transitions, 8915 flow [2024-06-28 04:29:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:29:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:29:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-28 04:29:26,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:29:26,427 INFO L175 Difference]: Start difference. First operand has 292 places, 401 transitions, 6794 flow. Second operand 11 states and 187 transitions. [2024-06-28 04:29:26,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 460 transitions, 8915 flow [2024-06-28 04:29:27,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 460 transitions, 8493 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 04:29:27,173 INFO L231 Difference]: Finished difference. Result has 299 places, 423 transitions, 7197 flow [2024-06-28 04:29:27,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6404, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7197, PETRI_PLACES=299, PETRI_TRANSITIONS=423} [2024-06-28 04:29:27,173 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-28 04:29:27,173 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 423 transitions, 7197 flow [2024-06-28 04:29:27,174 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 04:29:27,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:27,174 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 04:29:27,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 04:29:27,174 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 04:29:27,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:27,174 INFO L85 PathProgramCache]: Analyzing trace with hash 490575118, now seen corresponding path program 12 times [2024-06-28 04:29:27,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:27,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092958639] [2024-06-28 04:29:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:27,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:29,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:29,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092958639] [2024-06-28 04:29:29,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092958639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:29,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:29,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:29:29,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056789754] [2024-06-28 04:29:29,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:29,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:29:29,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:29:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:29:29,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:29,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 423 transitions, 7197 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:29,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:29,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:29,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:31,465 INFO L124 PetriNetUnfolderBase]: 3395/5309 cut-off events. [2024-06-28 04:29:31,465 INFO L125 PetriNetUnfolderBase]: For 534292/534292 co-relation queries the response was YES. [2024-06-28 04:29:31,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43695 conditions, 5309 events. 3395/5309 cut-off events. For 534292/534292 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 30917 event pairs, 821 based on Foata normal form. 4/5310 useless extension candidates. Maximal degree in co-relation 43557. Up to 4953 conditions per place. [2024-06-28 04:29:31,527 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 350 selfloop transitions, 86 changer transitions 0/441 dead transitions. [2024-06-28 04:29:31,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 441 transitions, 8279 flow [2024-06-28 04:29:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 04:29:31,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-28 04:29:31,529 INFO L175 Difference]: Start difference. First operand has 299 places, 423 transitions, 7197 flow. Second operand 9 states and 147 transitions. [2024-06-28 04:29:31,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 441 transitions, 8279 flow [2024-06-28 04:29:32,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 441 transitions, 7945 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-28 04:29:32,491 INFO L231 Difference]: Finished difference. Result has 302 places, 423 transitions, 7046 flow [2024-06-28 04:29:32,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6863, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7046, PETRI_PLACES=302, PETRI_TRANSITIONS=423} [2024-06-28 04:29:32,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-28 04:29:32,492 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 423 transitions, 7046 flow [2024-06-28 04:29:32,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:32,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:32,492 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 04:29:32,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 04:29:32,492 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 04:29:32,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:32,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1752710220, now seen corresponding path program 11 times [2024-06-28 04:29:32,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:32,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506199600] [2024-06-28 04:29:32,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:32,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:35,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:35,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506199600] [2024-06-28 04:29:35,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506199600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:35,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:35,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:35,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232621933] [2024-06-28 04:29:35,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:35,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:35,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:35,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:35,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:35,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:35,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 423 transitions, 7046 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 04:29:35,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:35,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:35,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:37,509 INFO L124 PetriNetUnfolderBase]: 3415/5356 cut-off events. [2024-06-28 04:29:37,509 INFO L125 PetriNetUnfolderBase]: For 543707/543707 co-relation queries the response was YES. [2024-06-28 04:29:37,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43619 conditions, 5356 events. 3415/5356 cut-off events. For 543707/543707 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 31534 event pairs, 1309 based on Foata normal form. 2/5358 useless extension candidates. Maximal degree in co-relation 43479. Up to 5029 conditions per place. [2024-06-28 04:29:37,569 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 415 selfloop transitions, 39 changer transitions 0/459 dead transitions. [2024-06-28 04:29:37,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 459 transitions, 8530 flow [2024-06-28 04:29:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:29:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:29:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 183 transitions. [2024-06-28 04:29:37,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-28 04:29:37,572 INFO L175 Difference]: Start difference. First operand has 302 places, 423 transitions, 7046 flow. Second operand 12 states and 183 transitions. [2024-06-28 04:29:37,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 459 transitions, 8530 flow [2024-06-28 04:29:38,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 459 transitions, 8413 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:38,383 INFO L231 Difference]: Finished difference. Result has 312 places, 431 transitions, 7225 flow [2024-06-28 04:29:38,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6929, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7225, PETRI_PLACES=312, PETRI_TRANSITIONS=431} [2024-06-28 04:29:38,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-28 04:29:38,384 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 431 transitions, 7225 flow [2024-06-28 04:29:38,385 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 04:29:38,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:38,385 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 04:29:38,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 04:29:38,385 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 04:29:38,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1929337856, now seen corresponding path program 13 times [2024-06-28 04:29:38,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:38,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432402595] [2024-06-28 04:29:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:38,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:40,716 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 04:29:40,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:40,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432402595] [2024-06-28 04:29:40,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432402595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:40,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:40,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:29:40,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851993105] [2024-06-28 04:29:40,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:40,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:29:40,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:40,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:29:40,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:29:40,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:40,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 431 transitions, 7225 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:40,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:40,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:40,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:42,355 INFO L124 PetriNetUnfolderBase]: 3409/5329 cut-off events. [2024-06-28 04:29:42,356 INFO L125 PetriNetUnfolderBase]: For 546729/546729 co-relation queries the response was YES. [2024-06-28 04:29:42,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43608 conditions, 5329 events. 3409/5329 cut-off events. For 546729/546729 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31050 event pairs, 823 based on Foata normal form. 2/5328 useless extension candidates. Maximal degree in co-relation 43464. Up to 4976 conditions per place. [2024-06-28 04:29:42,429 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 351 selfloop transitions, 89 changer transitions 0/445 dead transitions. [2024-06-28 04:29:42,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 445 transitions, 8141 flow [2024-06-28 04:29:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:29:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:29:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 04:29:42,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-28 04:29:42,430 INFO L175 Difference]: Start difference. First operand has 312 places, 431 transitions, 7225 flow. Second operand 8 states and 130 transitions. [2024-06-28 04:29:42,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 445 transitions, 8141 flow [2024-06-28 04:29:43,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 445 transitions, 7944 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-28 04:29:43,444 INFO L231 Difference]: Finished difference. Result has 313 places, 431 transitions, 7212 flow [2024-06-28 04:29:43,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7028, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7212, PETRI_PLACES=313, PETRI_TRANSITIONS=431} [2024-06-28 04:29:43,444 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-28 04:29:43,444 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 431 transitions, 7212 flow [2024-06-28 04:29:43,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:43,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:43,445 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 04:29:43,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 04:29:43,445 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 04:29:43,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:43,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1707664730, now seen corresponding path program 12 times [2024-06-28 04:29:43,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:43,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492222684] [2024-06-28 04:29:43,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:43,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:46,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:46,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492222684] [2024-06-28 04:29:46,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492222684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:46,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:46,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:46,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65027243] [2024-06-28 04:29:46,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:46,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:46,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:46,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:46,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:46,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:46,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 431 transitions, 7212 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 04:29:46,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:46,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:46,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:48,507 INFO L124 PetriNetUnfolderBase]: 3403/5344 cut-off events. [2024-06-28 04:29:48,508 INFO L125 PetriNetUnfolderBase]: For 554798/554798 co-relation queries the response was YES. [2024-06-28 04:29:48,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43484 conditions, 5344 events. 3403/5344 cut-off events. For 554798/554798 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 31501 event pairs, 1306 based on Foata normal form. 2/5346 useless extension candidates. Maximal degree in co-relation 43339. Up to 5018 conditions per place. [2024-06-28 04:29:48,573 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 37 changer transitions 0/454 dead transitions. [2024-06-28 04:29:48,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 454 transitions, 8353 flow [2024-06-28 04:29:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:29:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:29:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-28 04:29:48,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627906976744186 [2024-06-28 04:29:48,575 INFO L175 Difference]: Start difference. First operand has 313 places, 431 transitions, 7212 flow. Second operand 10 states and 156 transitions. [2024-06-28 04:29:48,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 454 transitions, 8353 flow [2024-06-28 04:29:49,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 454 transitions, 8089 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-28 04:29:49,465 INFO L231 Difference]: Finished difference. Result has 314 places, 431 transitions, 7028 flow [2024-06-28 04:29:49,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6948, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7028, PETRI_PLACES=314, PETRI_TRANSITIONS=431} [2024-06-28 04:29:49,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-28 04:29:49,466 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 431 transitions, 7028 flow [2024-06-28 04:29:49,467 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 04:29:49,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:49,467 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 04:29:49,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 04:29:49,467 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 04:29:49,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:49,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1981056840, now seen corresponding path program 13 times [2024-06-28 04:29:49,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:49,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110520706] [2024-06-28 04:29:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:49,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:52,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:52,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110520706] [2024-06-28 04:29:52,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110520706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:52,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:52,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:52,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545957638] [2024-06-28 04:29:52,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:52,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:52,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:52,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:52,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:52,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:52,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 431 transitions, 7028 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 04:29:52,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:52,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:52,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:53,619 INFO L124 PetriNetUnfolderBase]: 3397/5309 cut-off events. [2024-06-28 04:29:53,619 INFO L125 PetriNetUnfolderBase]: For 559868/559868 co-relation queries the response was YES. [2024-06-28 04:29:53,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43182 conditions, 5309 events. 3397/5309 cut-off events. For 559868/559868 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30870 event pairs, 759 based on Foata normal form. 2/5308 useless extension candidates. Maximal degree in co-relation 43036. Up to 4422 conditions per place. [2024-06-28 04:29:53,691 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 282 selfloop transitions, 174 changer transitions 0/461 dead transitions. [2024-06-28 04:29:53,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 461 transitions, 8629 flow [2024-06-28 04:29:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 04:29:53,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:29:53,693 INFO L175 Difference]: Start difference. First operand has 314 places, 431 transitions, 7028 flow. Second operand 9 states and 153 transitions. [2024-06-28 04:29:53,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 461 transitions, 8629 flow [2024-06-28 04:29:54,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 461 transitions, 8555 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 04:29:54,873 INFO L231 Difference]: Finished difference. Result has 315 places, 437 transitions, 7528 flow [2024-06-28 04:29:54,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6954, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7528, PETRI_PLACES=315, PETRI_TRANSITIONS=437} [2024-06-28 04:29:54,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-28 04:29:54,874 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 437 transitions, 7528 flow [2024-06-28 04:29:54,874 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 04:29:54,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:54,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:54,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 04:29:54,874 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 04:29:54,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:54,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1981043820, now seen corresponding path program 14 times [2024-06-28 04:29:54,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:54,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538080457] [2024-06-28 04:29:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:54,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:57,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:57,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538080457] [2024-06-28 04:29:57,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538080457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:57,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:57,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:57,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987842757] [2024-06-28 04:29:57,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:57,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:57,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:57,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:57,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:57,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:57,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 437 transitions, 7528 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 04:29:57,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:57,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:57,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:59,419 INFO L124 PetriNetUnfolderBase]: 3391/5324 cut-off events. [2024-06-28 04:29:59,419 INFO L125 PetriNetUnfolderBase]: For 573403/573403 co-relation queries the response was YES. [2024-06-28 04:29:59,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43941 conditions, 5324 events. 3391/5324 cut-off events. For 573403/573403 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 31380 event pairs, 1312 based on Foata normal form. 2/5326 useless extension candidates. Maximal degree in co-relation 43793. Up to 5071 conditions per place. [2024-06-28 04:29:59,493 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 423 selfloop transitions, 28 changer transitions 0/456 dead transitions. [2024-06-28 04:29:59,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 456 transitions, 8476 flow [2024-06-28 04:29:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-28 04:29:59,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-28 04:29:59,494 INFO L175 Difference]: Start difference. First operand has 315 places, 437 transitions, 7528 flow. Second operand 9 states and 141 transitions. [2024-06-28 04:29:59,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 456 transitions, 8476 flow [2024-06-28 04:30:00,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 456 transitions, 8094 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:00,647 INFO L231 Difference]: Finished difference. Result has 318 places, 437 transitions, 7208 flow [2024-06-28 04:30:00,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7146, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7208, PETRI_PLACES=318, PETRI_TRANSITIONS=437} [2024-06-28 04:30:00,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-28 04:30:00,647 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 437 transitions, 7208 flow [2024-06-28 04:30:00,647 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 04:30:00,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:00,648 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 04:30:00,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 04:30:00,648 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 04:30:00,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash -461395208, now seen corresponding path program 15 times [2024-06-28 04:30:00,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:00,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441803245] [2024-06-28 04:30:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:03,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:03,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441803245] [2024-06-28 04:30:03,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441803245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:03,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:03,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:03,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139210517] [2024-06-28 04:30:03,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:03,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:03,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:03,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:03,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:03,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:03,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 437 transitions, 7208 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 04:30:03,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:03,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:03,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:05,222 INFO L124 PetriNetUnfolderBase]: 3379/5299 cut-off events. [2024-06-28 04:30:05,223 INFO L125 PetriNetUnfolderBase]: For 573429/573429 co-relation queries the response was YES. [2024-06-28 04:30:05,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42953 conditions, 5299 events. 3379/5299 cut-off events. For 573429/573429 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30950 event pairs, 733 based on Foata normal form. 4/5300 useless extension candidates. Maximal degree in co-relation 42804. Up to 4413 conditions per place. [2024-06-28 04:30:05,288 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 301 selfloop transitions, 161 changer transitions 0/467 dead transitions. [2024-06-28 04:30:05,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 467 transitions, 8804 flow [2024-06-28 04:30:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:30:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:30:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-28 04:30:05,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 04:30:05,290 INFO L175 Difference]: Start difference. First operand has 318 places, 437 transitions, 7208 flow. Second operand 10 states and 172 transitions. [2024-06-28 04:30:05,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 467 transitions, 8804 flow [2024-06-28 04:30:06,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 467 transitions, 8667 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-28 04:30:06,394 INFO L231 Difference]: Finished difference. Result has 320 places, 438 transitions, 7456 flow [2024-06-28 04:30:06,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7071, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7456, PETRI_PLACES=320, PETRI_TRANSITIONS=438} [2024-06-28 04:30:06,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-28 04:30:06,395 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 438 transitions, 7456 flow [2024-06-28 04:30:06,395 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 04:30:06,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:06,395 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 04:30:06,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 04:30:06,395 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 04:30:06,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:06,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1692923672, now seen corresponding path program 3 times [2024-06-28 04:30:06,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:06,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830564540] [2024-06-28 04:30:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:06,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:10,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:10,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830564540] [2024-06-28 04:30:10,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830564540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:10,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:10,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:10,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557881297] [2024-06-28 04:30:10,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:10,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:10,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:10,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:10,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:10,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:10,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 438 transitions, 7456 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:10,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:10,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:10,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:12,214 INFO L124 PetriNetUnfolderBase]: 3423/5380 cut-off events. [2024-06-28 04:30:12,215 INFO L125 PetriNetUnfolderBase]: For 616167/616167 co-relation queries the response was YES. [2024-06-28 04:30:12,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43903 conditions, 5380 events. 3423/5380 cut-off events. For 616167/616167 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31846 event pairs, 1316 based on Foata normal form. 12/5392 useless extension candidates. Maximal degree in co-relation 43755. Up to 5110 conditions per place. [2024-06-28 04:30:12,282 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 436 selfloop transitions, 18 changer transitions 0/459 dead transitions. [2024-06-28 04:30:12,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 459 transitions, 8466 flow [2024-06-28 04:30:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:30:12,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-28 04:30:12,283 INFO L175 Difference]: Start difference. First operand has 320 places, 438 transitions, 7456 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:30:12,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 459 transitions, 8466 flow [2024-06-28 04:30:13,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 459 transitions, 8018 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-28 04:30:13,276 INFO L231 Difference]: Finished difference. Result has 320 places, 439 transitions, 7070 flow [2024-06-28 04:30:13,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7008, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7070, PETRI_PLACES=320, PETRI_TRANSITIONS=439} [2024-06-28 04:30:13,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-28 04:30:13,277 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 439 transitions, 7070 flow [2024-06-28 04:30:13,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:13,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:13,277 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 04:30:13,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 04:30:13,278 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 04:30:13,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:13,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1692418682, now seen corresponding path program 4 times [2024-06-28 04:30:13,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:13,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727508799] [2024-06-28 04:30:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:13,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:16,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:16,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727508799] [2024-06-28 04:30:16,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727508799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:16,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:16,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:16,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312509302] [2024-06-28 04:30:16,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:16,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:16,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:16,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:16,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:16,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:16,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 439 transitions, 7070 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:16,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:16,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:16,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:19,023 INFO L124 PetriNetUnfolderBase]: 3451/5436 cut-off events. [2024-06-28 04:30:19,023 INFO L125 PetriNetUnfolderBase]: For 598954/598954 co-relation queries the response was YES. [2024-06-28 04:30:19,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43429 conditions, 5436 events. 3451/5436 cut-off events. For 598954/598954 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32300 event pairs, 1324 based on Foata normal form. 8/5444 useless extension candidates. Maximal degree in co-relation 43281. Up to 5116 conditions per place. [2024-06-28 04:30:19,090 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 439 selfloop transitions, 21 changer transitions 0/465 dead transitions. [2024-06-28 04:30:19,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 465 transitions, 8128 flow [2024-06-28 04:30:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:30:19,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:30:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 04:30:19,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-28 04:30:19,091 INFO L175 Difference]: Start difference. First operand has 320 places, 439 transitions, 7070 flow. Second operand 9 states and 142 transitions. [2024-06-28 04:30:19,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 465 transitions, 8128 flow [2024-06-28 04:30:20,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 465 transitions, 8093 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:20,128 INFO L231 Difference]: Finished difference. Result has 324 places, 440 transitions, 7103 flow [2024-06-28 04:30:20,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7035, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7103, PETRI_PLACES=324, PETRI_TRANSITIONS=440} [2024-06-28 04:30:20,128 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-28 04:30:20,129 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 440 transitions, 7103 flow [2024-06-28 04:30:20,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:20,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:20,129 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 04:30:20,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 04:30:20,129 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 04:30:20,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:20,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2107503094, now seen corresponding path program 5 times [2024-06-28 04:30:20,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:20,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732691317] [2024-06-28 04:30:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:20,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:23,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:23,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732691317] [2024-06-28 04:30:23,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732691317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:23,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:23,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:23,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75672505] [2024-06-28 04:30:23,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:23,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:23,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:23,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:23,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 440 transitions, 7103 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:23,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:23,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:23,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:26,064 INFO L124 PetriNetUnfolderBase]: 3469/5447 cut-off events. [2024-06-28 04:30:26,065 INFO L125 PetriNetUnfolderBase]: For 611558/611558 co-relation queries the response was YES. [2024-06-28 04:30:26,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43429 conditions, 5447 events. 3469/5447 cut-off events. For 611558/611558 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32054 event pairs, 769 based on Foata normal form. 12/5456 useless extension candidates. Maximal degree in co-relation 43279. Up to 5020 conditions per place. [2024-06-28 04:30:26,134 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 396 selfloop transitions, 65 changer transitions 0/466 dead transitions. [2024-06-28 04:30:26,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 466 transitions, 8226 flow [2024-06-28 04:30:26,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:26,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:30:26,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-28 04:30:26,136 INFO L175 Difference]: Start difference. First operand has 324 places, 440 transitions, 7103 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:30:26,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 466 transitions, 8226 flow [2024-06-28 04:30:27,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 466 transitions, 8174 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 04:30:27,372 INFO L231 Difference]: Finished difference. Result has 325 places, 441 transitions, 7211 flow [2024-06-28 04:30:27,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7051, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7211, PETRI_PLACES=325, PETRI_TRANSITIONS=441} [2024-06-28 04:30:27,373 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-28 04:30:27,373 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 441 transitions, 7211 flow [2024-06-28 04:30:27,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:27,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:27,373 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 04:30:27,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:30:27,373 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 04:30:27,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:27,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1651139372, now seen corresponding path program 1 times [2024-06-28 04:30:27,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:27,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184408807] [2024-06-28 04:30:27,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:27,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:30,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:30,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184408807] [2024-06-28 04:30:30,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184408807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:30,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:30,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372808818] [2024-06-28 04:30:30,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:30,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:30,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:30:30,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 441 transitions, 7211 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:30,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:30,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:30:30,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:32,436 INFO L124 PetriNetUnfolderBase]: 3427/5470 cut-off events. [2024-06-28 04:30:32,437 INFO L125 PetriNetUnfolderBase]: For 597467/597488 co-relation queries the response was YES. [2024-06-28 04:30:32,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43149 conditions, 5470 events. 3427/5470 cut-off events. For 597467/597488 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 33337 event pairs, 1178 based on Foata normal form. 10/5411 useless extension candidates. Maximal degree in co-relation 42998. Up to 4829 conditions per place. [2024-06-28 04:30:32,503 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 380 selfloop transitions, 43 changer transitions 0/476 dead transitions. [2024-06-28 04:30:32,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 476 transitions, 8367 flow [2024-06-28 04:30:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:32,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 04:30:32,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-28 04:30:32,504 INFO L175 Difference]: Start difference. First operand has 325 places, 441 transitions, 7211 flow. Second operand 7 states and 136 transitions. [2024-06-28 04:30:32,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 476 transitions, 8367 flow [2024-06-28 04:30:33,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 476 transitions, 8229 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:33,739 INFO L231 Difference]: Finished difference. Result has 326 places, 443 transitions, 7189 flow [2024-06-28 04:30:33,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7073, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7189, PETRI_PLACES=326, PETRI_TRANSITIONS=443} [2024-06-28 04:30:33,739 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-28 04:30:33,740 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 443 transitions, 7189 flow [2024-06-28 04:30:33,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:33,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:33,740 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 04:30:33,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:30:33,740 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 04:30:33,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:33,740 INFO L85 PathProgramCache]: Analyzing trace with hash 745111702, now seen corresponding path program 1 times [2024-06-28 04:30:33,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:33,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845795847] [2024-06-28 04:30:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:33,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:36,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845795847] [2024-06-28 04:30:36,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845795847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:36,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:36,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:36,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009362077] [2024-06-28 04:30:36,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:36,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:36,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:36,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:36,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:36,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:36,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 443 transitions, 7189 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:36,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:36,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:36,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:38,949 INFO L124 PetriNetUnfolderBase]: 3603/5674 cut-off events. [2024-06-28 04:30:38,949 INFO L125 PetriNetUnfolderBase]: For 653108/653110 co-relation queries the response was YES. [2024-06-28 04:30:38,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45794 conditions, 5674 events. 3603/5674 cut-off events. For 653108/653110 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33619 event pairs, 808 based on Foata normal form. 6/5680 useless extension candidates. Maximal degree in co-relation 45642. Up to 4505 conditions per place. [2024-06-28 04:30:39,013 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 314 selfloop transitions, 177 changer transitions 0/496 dead transitions. [2024-06-28 04:30:39,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 496 transitions, 8895 flow [2024-06-28 04:30:39,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:30:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:30:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-28 04:30:39,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-28 04:30:39,015 INFO L175 Difference]: Start difference. First operand has 326 places, 443 transitions, 7189 flow. Second operand 10 states and 193 transitions. [2024-06-28 04:30:39,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 496 transitions, 8895 flow [2024-06-28 04:30:40,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 496 transitions, 8843 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:40,220 INFO L231 Difference]: Finished difference. Result has 333 places, 449 transitions, 7599 flow [2024-06-28 04:30:40,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7137, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7599, PETRI_PLACES=333, PETRI_TRANSITIONS=449} [2024-06-28 04:30:40,221 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-28 04:30:40,221 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 449 transitions, 7599 flow [2024-06-28 04:30:40,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:40,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:40,221 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 04:30:40,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:30:40,222 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 04:30:40,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1541913538, now seen corresponding path program 2 times [2024-06-28 04:30:40,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:40,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062437974] [2024-06-28 04:30:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:40,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:43,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:43,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062437974] [2024-06-28 04:30:43,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062437974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:43,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:43,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:43,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063219232] [2024-06-28 04:30:43,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:43,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:43,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:30:43,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 449 transitions, 7599 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:43,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:43,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:30:43,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:45,120 INFO L124 PetriNetUnfolderBase]: 3523/5604 cut-off events. [2024-06-28 04:30:45,121 INFO L125 PetriNetUnfolderBase]: For 659944/659965 co-relation queries the response was YES. [2024-06-28 04:30:45,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45128 conditions, 5604 events. 3523/5604 cut-off events. For 659944/659965 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34203 event pairs, 1228 based on Foata normal form. 16/5552 useless extension candidates. Maximal degree in co-relation 44974. Up to 5074 conditions per place. [2024-06-28 04:30:45,187 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 382 selfloop transitions, 41 changer transitions 0/476 dead transitions. [2024-06-28 04:30:45,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 476 transitions, 8551 flow [2024-06-28 04:30:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:30:45,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-28 04:30:45,189 INFO L175 Difference]: Start difference. First operand has 333 places, 449 transitions, 7599 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:30:45,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 476 transitions, 8551 flow [2024-06-28 04:30:46,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 476 transitions, 8163 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 04:30:46,454 INFO L231 Difference]: Finished difference. Result has 333 places, 450 transitions, 7315 flow [2024-06-28 04:30:46,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7211, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7315, PETRI_PLACES=333, PETRI_TRANSITIONS=450} [2024-06-28 04:30:46,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-28 04:30:46,454 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 450 transitions, 7315 flow [2024-06-28 04:30:46,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:46,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:46,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:46,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:30:46,455 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 04:30:46,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:46,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1939469470, now seen corresponding path program 2 times [2024-06-28 04:30:46,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:46,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021059510] [2024-06-28 04:30:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:46,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:49,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:49,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021059510] [2024-06-28 04:30:49,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021059510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:49,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:49,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:49,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71618561] [2024-06-28 04:30:49,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:49,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:49,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:49,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:49,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:49,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:49,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 450 transitions, 7315 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:49,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:49,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:49,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:51,864 INFO L124 PetriNetUnfolderBase]: 3759/5898 cut-off events. [2024-06-28 04:30:51,864 INFO L125 PetriNetUnfolderBase]: For 727222/727224 co-relation queries the response was YES. [2024-06-28 04:30:51,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48313 conditions, 5898 events. 3759/5898 cut-off events. For 727222/727224 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35042 event pairs, 806 based on Foata normal form. 10/5908 useless extension candidates. Maximal degree in co-relation 48158. Up to 4665 conditions per place. [2024-06-28 04:30:51,945 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 286 selfloop transitions, 208 changer transitions 0/499 dead transitions. [2024-06-28 04:30:51,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 499 transitions, 8975 flow [2024-06-28 04:30:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:30:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:30:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 04:30:51,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-28 04:30:51,947 INFO L175 Difference]: Start difference. First operand has 333 places, 450 transitions, 7315 flow. Second operand 9 states and 168 transitions. [2024-06-28 04:30:51,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 499 transitions, 8975 flow [2024-06-28 04:30:53,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 499 transitions, 8891 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:53,442 INFO L231 Difference]: Finished difference. Result has 337 places, 462 transitions, 7885 flow [2024-06-28 04:30:53,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7231, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7885, PETRI_PLACES=337, PETRI_TRANSITIONS=462} [2024-06-28 04:30:53,443 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-28 04:30:53,443 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 462 transitions, 7885 flow [2024-06-28 04:30:53,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:53,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:53,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:53,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:30:53,443 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 04:30:53,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:53,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1463917770, now seen corresponding path program 3 times [2024-06-28 04:30:53,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:53,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732340681] [2024-06-28 04:30:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:53,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:57,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:57,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732340681] [2024-06-28 04:30:57,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732340681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:57,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:57,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:57,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880219638] [2024-06-28 04:30:57,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:57,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:57,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:57,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:30:57,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 462 transitions, 7885 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:57,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:57,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:30:57,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:59,225 INFO L124 PetriNetUnfolderBase]: 3671/5814 cut-off events. [2024-06-28 04:30:59,226 INFO L125 PetriNetUnfolderBase]: For 721587/721610 co-relation queries the response was YES. [2024-06-28 04:30:59,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47612 conditions, 5814 events. 3671/5814 cut-off events. For 721587/721610 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35430 event pairs, 1275 based on Foata normal form. 16/5756 useless extension candidates. Maximal degree in co-relation 47456. Up to 5286 conditions per place. [2024-06-28 04:30:59,295 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 394 selfloop transitions, 44 changer transitions 0/491 dead transitions. [2024-06-28 04:30:59,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 491 transitions, 8873 flow [2024-06-28 04:30:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:30:59,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:30:59,297 INFO L175 Difference]: Start difference. First operand has 337 places, 462 transitions, 7885 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:30:59,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 491 transitions, 8873 flow [2024-06-28 04:31:00,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 491 transitions, 8365 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-28 04:31:00,788 INFO L231 Difference]: Finished difference. Result has 338 places, 463 transitions, 7489 flow [2024-06-28 04:31:00,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7377, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7489, PETRI_PLACES=338, PETRI_TRANSITIONS=463} [2024-06-28 04:31:00,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-28 04:31:00,788 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 463 transitions, 7489 flow [2024-06-28 04:31:00,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:00,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:00,789 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 04:31:00,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 04:31:00,789 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 04:31:00,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:00,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1061812078, now seen corresponding path program 3 times [2024-06-28 04:31:00,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:00,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625211095] [2024-06-28 04:31:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:00,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:04,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:04,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625211095] [2024-06-28 04:31:04,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625211095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:04,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:04,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:04,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751456205] [2024-06-28 04:31:04,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:04,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:04,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:04,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:04,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:04,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:04,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 463 transitions, 7489 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:04,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:04,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:04,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:06,538 INFO L124 PetriNetUnfolderBase]: 3915/6107 cut-off events. [2024-06-28 04:31:06,538 INFO L125 PetriNetUnfolderBase]: For 775839/775841 co-relation queries the response was YES. [2024-06-28 04:31:06,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50356 conditions, 6107 events. 3915/6107 cut-off events. For 775839/775841 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 36255 event pairs, 936 based on Foata normal form. 10/6116 useless extension candidates. Maximal degree in co-relation 50200. Up to 4825 conditions per place. [2024-06-28 04:31:06,641 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 275 selfloop transitions, 228 changer transitions 0/508 dead transitions. [2024-06-28 04:31:06,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 508 transitions, 9173 flow [2024-06-28 04:31:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 04:31:06,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:31:06,643 INFO L175 Difference]: Start difference. First operand has 338 places, 463 transitions, 7489 flow. Second operand 9 states and 162 transitions. [2024-06-28 04:31:06,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 508 transitions, 9173 flow [2024-06-28 04:31:07,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 508 transitions, 9081 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:07,924 INFO L231 Difference]: Finished difference. Result has 341 places, 475 transitions, 8087 flow [2024-06-28 04:31:07,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7397, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8087, PETRI_PLACES=341, PETRI_TRANSITIONS=475} [2024-06-28 04:31:07,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-28 04:31:07,925 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 475 transitions, 8087 flow [2024-06-28 04:31:07,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:07,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:07,925 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 04:31:07,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 04:31:07,925 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 04:31:07,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1532806544, now seen corresponding path program 1 times [2024-06-28 04:31:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:07,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503585739] [2024-06-28 04:31:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:07,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:11,480 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 04:31:11,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503585739] [2024-06-28 04:31:11,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503585739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:11,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:11,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:11,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370604594] [2024-06-28 04:31:11,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:11,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:11,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:11,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:11,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:11,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:11,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 475 transitions, 8087 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:11,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:11,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:11,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:13,612 INFO L124 PetriNetUnfolderBase]: 3923/6126 cut-off events. [2024-06-28 04:31:13,612 INFO L125 PetriNetUnfolderBase]: For 776253/776255 co-relation queries the response was YES. [2024-06-28 04:31:13,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51433 conditions, 6126 events. 3923/6126 cut-off events. For 776253/776255 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 36602 event pairs, 1411 based on Foata normal form. 4/6130 useless extension candidates. Maximal degree in co-relation 51276. Up to 5765 conditions per place. [2024-06-28 04:31:13,712 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 447 selfloop transitions, 46 changer transitions 0/498 dead transitions. [2024-06-28 04:31:13,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 498 transitions, 9193 flow [2024-06-28 04:31:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:31:13,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-28 04:31:13,713 INFO L175 Difference]: Start difference. First operand has 341 places, 475 transitions, 8087 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:31:13,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 498 transitions, 9193 flow [2024-06-28 04:31:15,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 498 transitions, 8649 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:15,258 INFO L231 Difference]: Finished difference. Result has 343 places, 477 transitions, 7708 flow [2024-06-28 04:31:15,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7543, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7708, PETRI_PLACES=343, PETRI_TRANSITIONS=477} [2024-06-28 04:31:15,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-28 04:31:15,259 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 477 transitions, 7708 flow [2024-06-28 04:31:15,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:15,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:15,259 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 04:31:15,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 04:31:15,260 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 04:31:15,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1366710316, now seen corresponding path program 4 times [2024-06-28 04:31:15,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:15,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440976873] [2024-06-28 04:31:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:15,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:18,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:18,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440976873] [2024-06-28 04:31:18,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440976873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:18,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:18,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:18,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473652515] [2024-06-28 04:31:18,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:18,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:18,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:18,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:31:18,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 477 transitions, 7708 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:18,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:18,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:31:18,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:20,491 INFO L124 PetriNetUnfolderBase]: 3743/5898 cut-off events. [2024-06-28 04:31:20,491 INFO L125 PetriNetUnfolderBase]: For 716934/716960 co-relation queries the response was YES. [2024-06-28 04:31:20,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46883 conditions, 5898 events. 3743/5898 cut-off events. For 716934/716960 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 35902 event pairs, 1322 based on Foata normal form. 14/5837 useless extension candidates. Maximal degree in co-relation 46725. Up to 5456 conditions per place. [2024-06-28 04:31:20,571 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 421 selfloop transitions, 25 changer transitions 0/499 dead transitions. [2024-06-28 04:31:20,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 499 transitions, 8678 flow [2024-06-28 04:31:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:31:20,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-28 04:31:20,573 INFO L175 Difference]: Start difference. First operand has 343 places, 477 transitions, 7708 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:31:20,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 499 transitions, 8678 flow [2024-06-28 04:31:22,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 499 transitions, 8525 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:22,151 INFO L231 Difference]: Finished difference. Result has 345 places, 477 transitions, 7611 flow [2024-06-28 04:31:22,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7611, PETRI_PLACES=345, PETRI_TRANSITIONS=477} [2024-06-28 04:31:22,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-28 04:31:22,152 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 477 transitions, 7611 flow [2024-06-28 04:31:22,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:22,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:22,153 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 04:31:22,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 04:31:22,153 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 04:31:22,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:22,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1744420138, now seen corresponding path program 2 times [2024-06-28 04:31:22,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:22,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473873842] [2024-06-28 04:31:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:22,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:25,389 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 04:31:25,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:25,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473873842] [2024-06-28 04:31:25,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473873842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:25,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:25,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:25,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309148678] [2024-06-28 04:31:25,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:25,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:25,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:25,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:25,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:25,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:25,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 477 transitions, 7611 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:25,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:25,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:25,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:27,796 INFO L124 PetriNetUnfolderBase]: 3898/6077 cut-off events. [2024-06-28 04:31:27,797 INFO L125 PetriNetUnfolderBase]: For 749280/749280 co-relation queries the response was YES. [2024-06-28 04:31:27,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49238 conditions, 6077 events. 3898/6077 cut-off events. For 749280/749280 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 36242 event pairs, 1433 based on Foata normal form. 2/6079 useless extension candidates. Maximal degree in co-relation 49079. Up to 5822 conditions per place. [2024-06-28 04:31:27,869 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 467 selfloop transitions, 27 changer transitions 0/499 dead transitions. [2024-06-28 04:31:27,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 499 transitions, 8715 flow [2024-06-28 04:31:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:31:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:31:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-28 04:31:27,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3511627906976744 [2024-06-28 04:31:27,871 INFO L175 Difference]: Start difference. First operand has 345 places, 477 transitions, 7611 flow. Second operand 10 states and 151 transitions. [2024-06-28 04:31:27,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 499 transitions, 8715 flow [2024-06-28 04:31:29,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 499 transitions, 8648 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:31:29,114 INFO L231 Difference]: Finished difference. Result has 348 places, 479 transitions, 7675 flow [2024-06-28 04:31:29,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7544, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7675, PETRI_PLACES=348, PETRI_TRANSITIONS=479} [2024-06-28 04:31:29,114 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-28 04:31:29,114 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 479 transitions, 7675 flow [2024-06-28 04:31:29,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:29,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:29,115 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 04:31:29,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 04:31:29,115 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 04:31:29,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:29,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1744123468, now seen corresponding path program 3 times [2024-06-28 04:31:29,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:29,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607064352] [2024-06-28 04:31:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:29,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:32,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:32,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607064352] [2024-06-28 04:31:32,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607064352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:32,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:32,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:32,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275045631] [2024-06-28 04:31:32,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:32,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:32,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:32,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:32,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:32,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 479 transitions, 7675 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:32,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:32,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:32,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:34,228 INFO L124 PetriNetUnfolderBase]: 3980/6205 cut-off events. [2024-06-28 04:31:34,229 INFO L125 PetriNetUnfolderBase]: For 797451/797451 co-relation queries the response was YES. [2024-06-28 04:31:34,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50803 conditions, 6205 events. 3980/6205 cut-off events. For 797451/797451 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 37076 event pairs, 1457 based on Foata normal form. 2/6207 useless extension candidates. Maximal degree in co-relation 50643. Up to 5813 conditions per place. [2024-06-28 04:31:34,322 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 474 selfloop transitions, 31 changer transitions 0/510 dead transitions. [2024-06-28 04:31:34,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 510 transitions, 9102 flow [2024-06-28 04:31:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:31:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:31:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-28 04:31:34,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-28 04:31:34,324 INFO L175 Difference]: Start difference. First operand has 348 places, 479 transitions, 7675 flow. Second operand 10 states and 157 transitions. [2024-06-28 04:31:34,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 510 transitions, 9102 flow [2024-06-28 04:31:35,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 510 transitions, 8987 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-28 04:31:35,744 INFO L231 Difference]: Finished difference. Result has 351 places, 483 transitions, 7743 flow [2024-06-28 04:31:35,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7560, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7743, PETRI_PLACES=351, PETRI_TRANSITIONS=483} [2024-06-28 04:31:35,745 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-28 04:31:35,745 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 483 transitions, 7743 flow [2024-06-28 04:31:35,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:35,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:35,745 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 04:31:35,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 04:31:35,746 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 04:31:35,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:35,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1928883768, now seen corresponding path program 4 times [2024-06-28 04:31:35,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:35,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155352154] [2024-06-28 04:31:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:35,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:39,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:39,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155352154] [2024-06-28 04:31:39,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155352154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:39,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:39,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:39,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364063057] [2024-06-28 04:31:39,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:39,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:39,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:39,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:39,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 483 transitions, 7743 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:39,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:39,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:39,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:41,120 INFO L124 PetriNetUnfolderBase]: 3975/6196 cut-off events. [2024-06-28 04:31:41,120 INFO L125 PetriNetUnfolderBase]: For 808181/808181 co-relation queries the response was YES. [2024-06-28 04:31:41,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50827 conditions, 6196 events. 3975/6196 cut-off events. For 808181/808181 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 37012 event pairs, 1458 based on Foata normal form. 2/6198 useless extension candidates. Maximal degree in co-relation 50665. Up to 5941 conditions per place. [2024-06-28 04:31:41,206 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 472 selfloop transitions, 27 changer transitions 0/504 dead transitions. [2024-06-28 04:31:41,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 504 transitions, 8864 flow [2024-06-28 04:31:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 04:31:41,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-28 04:31:41,208 INFO L175 Difference]: Start difference. First operand has 351 places, 483 transitions, 7743 flow. Second operand 9 states and 140 transitions. [2024-06-28 04:31:41,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 504 transitions, 8864 flow [2024-06-28 04:31:42,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 504 transitions, 8771 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:42,754 INFO L231 Difference]: Finished difference. Result has 355 places, 485 transitions, 7790 flow [2024-06-28 04:31:42,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7790, PETRI_PLACES=355, PETRI_TRANSITIONS=485} [2024-06-28 04:31:42,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-28 04:31:42,754 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 485 transitions, 7790 flow [2024-06-28 04:31:42,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:42,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:42,755 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 04:31:42,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 04:31:42,755 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 04:31:42,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:42,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1093155175, now seen corresponding path program 1 times [2024-06-28 04:31:42,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:42,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412312624] [2024-06-28 04:31:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:42,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:45,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:45,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412312624] [2024-06-28 04:31:45,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412312624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:45,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:45,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:45,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923231416] [2024-06-28 04:31:45,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:45,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:45,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:45,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:45,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:45,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 485 transitions, 7790 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:45,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:45,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:45,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:47,799 INFO L124 PetriNetUnfolderBase]: 4066/6338 cut-off events. [2024-06-28 04:31:47,800 INFO L125 PetriNetUnfolderBase]: For 831801/831801 co-relation queries the response was YES. [2024-06-28 04:31:47,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52118 conditions, 6338 events. 4066/6338 cut-off events. For 831801/831801 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 37853 event pairs, 950 based on Foata normal form. 2/6340 useless extension candidates. Maximal degree in co-relation 51954. Up to 5958 conditions per place. [2024-06-28 04:31:47,896 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 482 selfloop transitions, 62 changer transitions 0/549 dead transitions. [2024-06-28 04:31:47,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 549 transitions, 9474 flow [2024-06-28 04:31:47,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:31:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:31:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-28 04:31:47,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:31:47,898 INFO L175 Difference]: Start difference. First operand has 355 places, 485 transitions, 7790 flow. Second operand 10 states and 180 transitions. [2024-06-28 04:31:47,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 549 transitions, 9474 flow [2024-06-28 04:31:49,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 549 transitions, 9353 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-28 04:31:49,549 INFO L231 Difference]: Finished difference. Result has 360 places, 503 transitions, 8079 flow [2024-06-28 04:31:49,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7669, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8079, PETRI_PLACES=360, PETRI_TRANSITIONS=503} [2024-06-28 04:31:49,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-28 04:31:49,550 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 503 transitions, 8079 flow [2024-06-28 04:31:49,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:49,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:49,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:49,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 04:31:49,550 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 04:31:49,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash 115109175, now seen corresponding path program 2 times [2024-06-28 04:31:49,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:49,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259243779] [2024-06-28 04:31:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:49,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:52,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:52,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259243779] [2024-06-28 04:31:52,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259243779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:52,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:52,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:52,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113237614] [2024-06-28 04:31:52,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:52,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:52,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:52,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:52,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 503 transitions, 8079 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 04:31:52,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:52,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:52,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:54,688 INFO L124 PetriNetUnfolderBase]: 4074/6350 cut-off events. [2024-06-28 04:31:54,689 INFO L125 PetriNetUnfolderBase]: For 849062/849062 co-relation queries the response was YES. [2024-06-28 04:31:54,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52690 conditions, 6350 events. 4074/6350 cut-off events. For 849062/849062 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 37973 event pairs, 959 based on Foata normal form. 2/6352 useless extension candidates. Maximal degree in co-relation 52523. Up to 5966 conditions per place. [2024-06-28 04:31:54,789 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 478 selfloop transitions, 64 changer transitions 0/547 dead transitions. [2024-06-28 04:31:54,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 547 transitions, 9537 flow [2024-06-28 04:31:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 04:31:54,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-28 04:31:54,790 INFO L175 Difference]: Start difference. First operand has 360 places, 503 transitions, 8079 flow. Second operand 9 states and 166 transitions. [2024-06-28 04:31:54,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 547 transitions, 9537 flow [2024-06-28 04:31:56,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 547 transitions, 9468 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-28 04:31:56,912 INFO L231 Difference]: Finished difference. Result has 368 places, 506 transitions, 8202 flow [2024-06-28 04:31:56,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8020, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8202, PETRI_PLACES=368, PETRI_TRANSITIONS=506} [2024-06-28 04:31:56,913 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-28 04:31:56,913 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 506 transitions, 8202 flow [2024-06-28 04:31:56,913 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 04:31:56,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:56,913 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 04:31:56,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 04:31:56,914 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 04:31:56,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:56,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1916304237, now seen corresponding path program 3 times [2024-06-28 04:31:56,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:56,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323065241] [2024-06-28 04:31:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:56,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:59,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323065241] [2024-06-28 04:31:59,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323065241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:59,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:59,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:59,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435467672] [2024-06-28 04:31:59,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:59,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:59,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:59,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:59,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:59,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:59,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 506 transitions, 8202 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 04:31:59,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:59,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:59,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:01,995 INFO L124 PetriNetUnfolderBase]: 4092/6380 cut-off events. [2024-06-28 04:32:01,995 INFO L125 PetriNetUnfolderBase]: For 867300/867300 co-relation queries the response was YES. [2024-06-28 04:32:02,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53288 conditions, 6380 events. 4092/6380 cut-off events. For 867300/867300 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 38159 event pairs, 973 based on Foata normal form. 2/6382 useless extension candidates. Maximal degree in co-relation 53118. Up to 6053 conditions per place. [2024-06-28 04:32:02,082 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 479 selfloop transitions, 64 changer transitions 0/548 dead transitions. [2024-06-28 04:32:02,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 548 transitions, 9566 flow [2024-06-28 04:32:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:32:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:32:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 04:32:02,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-28 04:32:02,083 INFO L175 Difference]: Start difference. First operand has 368 places, 506 transitions, 8202 flow. Second operand 9 states and 158 transitions. [2024-06-28 04:32:02,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 548 transitions, 9566 flow [2024-06-28 04:32:03,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 548 transitions, 9439 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:03,971 INFO L231 Difference]: Finished difference. Result has 372 places, 516 transitions, 8411 flow [2024-06-28 04:32:03,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8087, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8411, PETRI_PLACES=372, PETRI_TRANSITIONS=516} [2024-06-28 04:32:03,971 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-28 04:32:03,971 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 516 transitions, 8411 flow [2024-06-28 04:32:03,972 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 04:32:03,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:03,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:03,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 04:32:03,972 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 04:32:03,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:03,972 INFO L85 PathProgramCache]: Analyzing trace with hash 117969111, now seen corresponding path program 1 times [2024-06-28 04:32:03,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:03,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789968559] [2024-06-28 04:32:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:03,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:06,534 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 04:32:06,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:06,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789968559] [2024-06-28 04:32:06,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789968559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:06,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:06,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:06,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307055390] [2024-06-28 04:32:06,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:06,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:06,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:06,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:06,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 516 transitions, 8411 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 04:32:06,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:06,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:06,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:08,786 INFO L124 PetriNetUnfolderBase]: 4167/6487 cut-off events. [2024-06-28 04:32:08,786 INFO L125 PetriNetUnfolderBase]: For 873540/873540 co-relation queries the response was YES. [2024-06-28 04:32:08,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54129 conditions, 6487 events. 4167/6487 cut-off events. For 873540/873540 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 38856 event pairs, 971 based on Foata normal form. 1/6488 useless extension candidates. Maximal degree in co-relation 53958. Up to 6100 conditions per place. [2024-06-28 04:32:08,893 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 494 selfloop transitions, 77 changer transitions 0/576 dead transitions. [2024-06-28 04:32:08,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 576 transitions, 10148 flow [2024-06-28 04:32:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:32:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:32:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 04:32:08,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-28 04:32:08,895 INFO L175 Difference]: Start difference. First operand has 372 places, 516 transitions, 8411 flow. Second operand 10 states and 182 transitions. [2024-06-28 04:32:08,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 576 transitions, 10148 flow [2024-06-28 04:32:10,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 576 transitions, 10010 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:10,931 INFO L231 Difference]: Finished difference. Result has 378 places, 533 transitions, 8755 flow [2024-06-28 04:32:10,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8273, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8755, PETRI_PLACES=378, PETRI_TRANSITIONS=533} [2024-06-28 04:32:10,932 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-28 04:32:10,932 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 533 transitions, 8755 flow [2024-06-28 04:32:10,932 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 04:32:10,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:10,932 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 04:32:10,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 04:32:10,933 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 04:32:10,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:10,933 INFO L85 PathProgramCache]: Analyzing trace with hash -731443455, now seen corresponding path program 4 times [2024-06-28 04:32:10,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:10,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270531358] [2024-06-28 04:32:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:10,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:14,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270531358] [2024-06-28 04:32:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270531358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:14,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:14,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:14,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522676812] [2024-06-28 04:32:14,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:14,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:14,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:14,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:14,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 533 transitions, 8755 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 04:32:14,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:14,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:14,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:17,125 INFO L124 PetriNetUnfolderBase]: 4162/6474 cut-off events. [2024-06-28 04:32:17,125 INFO L125 PetriNetUnfolderBase]: For 890226/890226 co-relation queries the response was YES. [2024-06-28 04:32:17,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54705 conditions, 6474 events. 4162/6474 cut-off events. For 890226/890226 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 38673 event pairs, 980 based on Foata normal form. 2/6476 useless extension candidates. Maximal degree in co-relation 54531. Up to 6153 conditions per place. [2024-06-28 04:32:17,212 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 487 selfloop transitions, 67 changer transitions 0/559 dead transitions. [2024-06-28 04:32:17,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 559 transitions, 9939 flow [2024-06-28 04:32:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:32:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:32:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:32:17,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-28 04:32:17,214 INFO L175 Difference]: Start difference. First operand has 378 places, 533 transitions, 8755 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:32:17,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 559 transitions, 9939 flow [2024-06-28 04:32:19,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 559 transitions, 9731 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:19,518 INFO L231 Difference]: Finished difference. Result has 381 places, 533 transitions, 8687 flow [2024-06-28 04:32:19,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8547, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8687, PETRI_PLACES=381, PETRI_TRANSITIONS=533} [2024-06-28 04:32:19,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-28 04:32:19,519 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 533 transitions, 8687 flow [2024-06-28 04:32:19,519 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 04:32:19,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:19,519 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 04:32:19,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 04:32:19,519 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 04:32:19,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash 398899415, now seen corresponding path program 2 times [2024-06-28 04:32:19,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:19,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998198951] [2024-06-28 04:32:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:19,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:22,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:22,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998198951] [2024-06-28 04:32:22,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998198951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:22,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:22,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414512656] [2024-06-28 04:32:22,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:22,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:22,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:22,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:22,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:22,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 533 transitions, 8687 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 04:32:22,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:22,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:22,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:24,660 INFO L124 PetriNetUnfolderBase]: 4374/6827 cut-off events. [2024-06-28 04:32:24,661 INFO L125 PetriNetUnfolderBase]: For 927873/927875 co-relation queries the response was YES. [2024-06-28 04:32:24,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57205 conditions, 6827 events. 4374/6827 cut-off events. For 927873/927875 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 41298 event pairs, 887 based on Foata normal form. 3/6830 useless extension candidates. Maximal degree in co-relation 57029. Up to 5510 conditions per place. [2024-06-28 04:32:24,784 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 415 selfloop transitions, 201 changer transitions 0/621 dead transitions. [2024-06-28 04:32:24,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 621 transitions, 11515 flow [2024-06-28 04:32:24,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:32:24,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:32:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 04:32:24,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-28 04:32:24,786 INFO L175 Difference]: Start difference. First operand has 381 places, 533 transitions, 8687 flow. Second operand 9 states and 175 transitions. [2024-06-28 04:32:24,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 621 transitions, 11515 flow [2024-06-28 04:32:27,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 621 transitions, 11351 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 04:32:27,227 INFO L231 Difference]: Finished difference. Result has 386 places, 567 transitions, 9595 flow [2024-06-28 04:32:27,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8523, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9595, PETRI_PLACES=386, PETRI_TRANSITIONS=567} [2024-06-28 04:32:27,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-28 04:32:27,228 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 567 transitions, 9595 flow [2024-06-28 04:32:27,228 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 04:32:27,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:27,228 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 04:32:27,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 04:32:27,228 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 04:32:27,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:27,228 INFO L85 PathProgramCache]: Analyzing trace with hash 409374935, now seen corresponding path program 3 times [2024-06-28 04:32:27,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:27,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971645536] [2024-06-28 04:32:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:27,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:30,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:30,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971645536] [2024-06-28 04:32:30,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971645536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:30,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:30,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:30,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110392628] [2024-06-28 04:32:30,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:30,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:30,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:30,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:30,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:30,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:30,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 567 transitions, 9595 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 04:32:30,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:30,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:30,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:32,480 INFO L124 PetriNetUnfolderBase]: 4379/6836 cut-off events. [2024-06-28 04:32:32,481 INFO L125 PetriNetUnfolderBase]: For 957441/957443 co-relation queries the response was YES. [2024-06-28 04:32:32,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59206 conditions, 6836 events. 4379/6836 cut-off events. For 957441/957443 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41371 event pairs, 885 based on Foata normal form. 3/6839 useless extension candidates. Maximal degree in co-relation 59026. Up to 5514 conditions per place. [2024-06-28 04:32:32,594 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 410 selfloop transitions, 205 changer transitions 0/620 dead transitions. [2024-06-28 04:32:32,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 620 transitions, 12017 flow [2024-06-28 04:32:32,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:32:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:32:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 04:32:32,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 04:32:32,596 INFO L175 Difference]: Start difference. First operand has 386 places, 567 transitions, 9595 flow. Second operand 9 states and 171 transitions. [2024-06-28 04:32:32,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 620 transitions, 12017 flow [2024-06-28 04:32:34,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 620 transitions, 11790 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-28 04:32:34,989 INFO L231 Difference]: Finished difference. Result has 393 places, 571 transitions, 9928 flow [2024-06-28 04:32:34,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9408, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9928, PETRI_PLACES=393, PETRI_TRANSITIONS=571} [2024-06-28 04:32:34,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-28 04:32:34,990 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 571 transitions, 9928 flow [2024-06-28 04:32:34,990 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 04:32:34,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:34,990 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 04:32:34,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 04:32:34,991 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 04:32:34,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:34,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1059146439, now seen corresponding path program 4 times [2024-06-28 04:32:34,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:34,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486446515] [2024-06-28 04:32:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:34,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:37,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:37,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486446515] [2024-06-28 04:32:37,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486446515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:37,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:37,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:37,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791360204] [2024-06-28 04:32:37,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:37,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:37,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:37,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:37,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:37,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:37,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 571 transitions, 9928 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 04:32:37,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:37,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:37,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:40,092 INFO L124 PetriNetUnfolderBase]: 4392/6855 cut-off events. [2024-06-28 04:32:40,092 INFO L125 PetriNetUnfolderBase]: For 979282/979282 co-relation queries the response was YES. [2024-06-28 04:32:40,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59821 conditions, 6855 events. 4392/6855 cut-off events. For 979282/979282 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 41619 event pairs, 1011 based on Foata normal form. 1/6856 useless extension candidates. Maximal degree in co-relation 59639. Up to 6438 conditions per place. [2024-06-28 04:32:40,200 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 510 selfloop transitions, 87 changer transitions 0/602 dead transitions. [2024-06-28 04:32:40,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 602 transitions, 11460 flow [2024-06-28 04:32:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:32:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:32:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 04:32:40,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-28 04:32:40,202 INFO L175 Difference]: Start difference. First operand has 393 places, 571 transitions, 9928 flow. Second operand 10 states and 167 transitions. [2024-06-28 04:32:40,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 602 transitions, 11460 flow [2024-06-28 04:32:42,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 602 transitions, 10994 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:42,685 INFO L231 Difference]: Finished difference. Result has 399 places, 574 transitions, 9723 flow [2024-06-28 04:32:42,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9468, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9723, PETRI_PLACES=399, PETRI_TRANSITIONS=574} [2024-06-28 04:32:42,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-28 04:32:42,686 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 574 transitions, 9723 flow [2024-06-28 04:32:42,686 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 04:32:42,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:42,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:42,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 04:32:42,698 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 04:32:42,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:42,699 INFO L85 PathProgramCache]: Analyzing trace with hash 945755791, now seen corresponding path program 5 times [2024-06-28 04:32:42,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:42,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773246519] [2024-06-28 04:32:42,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:42,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:45,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:45,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773246519] [2024-06-28 04:32:45,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773246519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:45,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:45,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:45,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493807654] [2024-06-28 04:32:45,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:45,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:45,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:45,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:45,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:45,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 574 transitions, 9723 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 04:32:45,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:45,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:45,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:48,098 INFO L124 PetriNetUnfolderBase]: 4479/6986 cut-off events. [2024-06-28 04:32:48,099 INFO L125 PetriNetUnfolderBase]: For 1010464/1010464 co-relation queries the response was YES. [2024-06-28 04:32:48,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60510 conditions, 6986 events. 4479/6986 cut-off events. For 1010464/1010464 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 42539 event pairs, 1029 based on Foata normal form. 2/6988 useless extension candidates. Maximal degree in co-relation 60326. Up to 6539 conditions per place. [2024-06-28 04:32:48,202 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 551 selfloop transitions, 78 changer transitions 0/634 dead transitions. [2024-06-28 04:32:48,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 634 transitions, 11614 flow [2024-06-28 04:32:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:32:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:32:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 04:32:48,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-28 04:32:48,216 INFO L175 Difference]: Start difference. First operand has 399 places, 574 transitions, 9723 flow. Second operand 9 states and 166 transitions. [2024-06-28 04:32:48,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 634 transitions, 11614 flow [2024-06-28 04:32:50,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 634 transitions, 11410 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 04:32:50,140 INFO L231 Difference]: Finished difference. Result has 402 places, 592 transitions, 10038 flow [2024-06-28 04:32:50,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9531, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10038, PETRI_PLACES=402, PETRI_TRANSITIONS=592} [2024-06-28 04:32:50,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-28 04:32:50,141 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 592 transitions, 10038 flow [2024-06-28 04:32:50,141 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 04:32:50,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:50,141 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 04:32:50,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 04:32:50,142 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 04:32:50,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:50,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1859063463, now seen corresponding path program 6 times [2024-06-28 04:32:50,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:50,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783453845] [2024-06-28 04:32:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:50,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:52,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:52,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783453845] [2024-06-28 04:32:52,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783453845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:52,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:52,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:52,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703216240] [2024-06-28 04:32:52,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:52,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:52,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:52,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:52,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:53,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:53,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 592 transitions, 10038 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 04:32:53,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:53,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:53,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:55,502 INFO L124 PetriNetUnfolderBase]: 4474/6987 cut-off events. [2024-06-28 04:32:55,503 INFO L125 PetriNetUnfolderBase]: For 1021434/1021434 co-relation queries the response was YES. [2024-06-28 04:32:55,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60846 conditions, 6987 events. 4474/6987 cut-off events. For 1021434/1021434 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 42641 event pairs, 1043 based on Foata normal form. 2/6989 useless extension candidates. Maximal degree in co-relation 60659. Up to 6599 conditions per place. [2024-06-28 04:32:55,602 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 548 selfloop transitions, 73 changer transitions 0/626 dead transitions. [2024-06-28 04:32:55,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 626 transitions, 11408 flow [2024-06-28 04:32:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:32:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:32:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 04:32:55,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-28 04:32:55,604 INFO L175 Difference]: Start difference. First operand has 402 places, 592 transitions, 10038 flow. Second operand 9 states and 157 transitions. [2024-06-28 04:32:55,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 626 transitions, 11408 flow [2024-06-28 04:32:58,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 626 transitions, 10964 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-28 04:32:58,305 INFO L231 Difference]: Finished difference. Result has 405 places, 593 transitions, 9779 flow [2024-06-28 04:32:58,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9594, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9779, PETRI_PLACES=405, PETRI_TRANSITIONS=593} [2024-06-28 04:32:58,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-28 04:32:58,305 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 593 transitions, 9779 flow [2024-06-28 04:32:58,306 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 04:32:58,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:58,306 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 04:32:58,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 04:32:58,306 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 04:32:58,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:58,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2085740263, now seen corresponding path program 7 times [2024-06-28 04:32:58,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:58,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640402817] [2024-06-28 04:32:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:58,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:00,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:00,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640402817] [2024-06-28 04:33:00,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640402817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:00,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:00,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:00,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355737755] [2024-06-28 04:33:00,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:00,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:00,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:00,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:00,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:00,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:00,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 593 transitions, 9779 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 04:33:00,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:00,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:00,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:02,991 INFO L124 PetriNetUnfolderBase]: 4526/7065 cut-off events. [2024-06-28 04:33:02,992 INFO L125 PetriNetUnfolderBase]: For 1037821/1037821 co-relation queries the response was YES. [2024-06-28 04:33:03,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60831 conditions, 7065 events. 4526/7065 cut-off events. For 1037821/1037821 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 42962 event pairs, 897 based on Foata normal form. 2/7067 useless extension candidates. Maximal degree in co-relation 60645. Up to 6442 conditions per place. [2024-06-28 04:33:03,113 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 541 selfloop transitions, 98 changer transitions 0/644 dead transitions. [2024-06-28 04:33:03,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 644 transitions, 11544 flow [2024-06-28 04:33:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 04:33:03,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-28 04:33:03,115 INFO L175 Difference]: Start difference. First operand has 405 places, 593 transitions, 9779 flow. Second operand 9 states and 163 transitions. [2024-06-28 04:33:03,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 644 transitions, 11544 flow [2024-06-28 04:33:05,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 644 transitions, 11409 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:05,622 INFO L231 Difference]: Finished difference. Result has 410 places, 604 transitions, 10058 flow [2024-06-28 04:33:05,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9644, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10058, PETRI_PLACES=410, PETRI_TRANSITIONS=604} [2024-06-28 04:33:05,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-28 04:33:05,622 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 604 transitions, 10058 flow [2024-06-28 04:33:05,623 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 04:33:05,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:05,623 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 04:33:05,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 04:33:05,623 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 04:33:05,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1182323429, now seen corresponding path program 5 times [2024-06-28 04:33:05,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:05,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619960759] [2024-06-28 04:33:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:05,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:08,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:08,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619960759] [2024-06-28 04:33:08,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619960759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:08,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:08,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:08,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284987127] [2024-06-28 04:33:08,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:08,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:08,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:08,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:08,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:08,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:08,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 604 transitions, 10058 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 04:33:08,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:08,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:08,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:11,051 INFO L124 PetriNetUnfolderBase]: 4633/7223 cut-off events. [2024-06-28 04:33:11,051 INFO L125 PetriNetUnfolderBase]: For 1077947/1077947 co-relation queries the response was YES. [2024-06-28 04:33:11,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63200 conditions, 7223 events. 4633/7223 cut-off events. For 1077947/1077947 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 44205 event pairs, 1050 based on Foata normal form. 1/7224 useless extension candidates. Maximal degree in co-relation 63011. Up to 6640 conditions per place. [2024-06-28 04:33:11,170 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 564 selfloop transitions, 126 changer transitions 0/695 dead transitions. [2024-06-28 04:33:11,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 695 transitions, 12507 flow [2024-06-28 04:33:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:33:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:33:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-28 04:33:11,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249471458773784 [2024-06-28 04:33:11,172 INFO L175 Difference]: Start difference. First operand has 410 places, 604 transitions, 10058 flow. Second operand 11 states and 201 transitions. [2024-06-28 04:33:11,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 695 transitions, 12507 flow [2024-06-28 04:33:13,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 695 transitions, 12321 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-28 04:33:13,797 INFO L231 Difference]: Finished difference. Result has 419 places, 643 transitions, 10861 flow [2024-06-28 04:33:13,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9884, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10861, PETRI_PLACES=419, PETRI_TRANSITIONS=643} [2024-06-28 04:33:13,798 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-28 04:33:13,798 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 643 transitions, 10861 flow [2024-06-28 04:33:13,798 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 04:33:13,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:13,798 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 04:33:13,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 04:33:13,799 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 04:33:13,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash 921812812, now seen corresponding path program 4 times [2024-06-28 04:33:13,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:13,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101103243] [2024-06-28 04:33:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:13,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:16,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:16,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101103243] [2024-06-28 04:33:16,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101103243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:16,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:16,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:16,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867891833] [2024-06-28 04:33:16,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:16,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:16,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:16,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:16,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 643 transitions, 10861 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:16,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:16,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:16,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:19,030 INFO L124 PetriNetUnfolderBase]: 4653/7283 cut-off events. [2024-06-28 04:33:19,030 INFO L125 PetriNetUnfolderBase]: For 1112787/1112795 co-relation queries the response was YES. [2024-06-28 04:33:19,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64554 conditions, 7283 events. 4653/7283 cut-off events. For 1112787/1112795 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 44635 event pairs, 913 based on Foata normal form. 12/7295 useless extension candidates. Maximal degree in co-relation 64361. Up to 5909 conditions per place. [2024-06-28 04:33:19,136 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 482 selfloop transitions, 204 changer transitions 0/691 dead transitions. [2024-06-28 04:33:19,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 691 transitions, 13058 flow [2024-06-28 04:33:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:19,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 04:33:19,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-28 04:33:19,138 INFO L175 Difference]: Start difference. First operand has 419 places, 643 transitions, 10861 flow. Second operand 9 states and 178 transitions. [2024-06-28 04:33:19,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 691 transitions, 13058 flow [2024-06-28 04:33:22,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 691 transitions, 12889 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:22,569 INFO L231 Difference]: Finished difference. Result has 423 places, 648 transitions, 11222 flow [2024-06-28 04:33:22,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10692, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11222, PETRI_PLACES=423, PETRI_TRANSITIONS=648} [2024-06-28 04:33:22,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-28 04:33:22,570 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 648 transitions, 11222 flow [2024-06-28 04:33:22,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:22,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:22,570 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 04:33:22,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 04:33:22,571 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 04:33:22,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:22,571 INFO L85 PathProgramCache]: Analyzing trace with hash 745117282, now seen corresponding path program 5 times [2024-06-28 04:33:22,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:22,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312901525] [2024-06-28 04:33:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:22,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:25,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:25,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312901525] [2024-06-28 04:33:25,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312901525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:25,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:25,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:33:25,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988922911] [2024-06-28 04:33:25,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:25,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:33:25,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:25,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:33:25,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:33:25,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:25,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 648 transitions, 11222 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:25,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:25,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:25,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:28,855 INFO L124 PetriNetUnfolderBase]: 4641/7274 cut-off events. [2024-06-28 04:33:28,855 INFO L125 PetriNetUnfolderBase]: For 1115427/1115429 co-relation queries the response was YES. [2024-06-28 04:33:28,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65223 conditions, 7274 events. 4641/7274 cut-off events. For 1115427/1115429 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 44640 event pairs, 965 based on Foata normal form. 6/7280 useless extension candidates. Maximal degree in co-relation 65027. Up to 5901 conditions per place. [2024-06-28 04:33:28,966 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 485 selfloop transitions, 205 changer transitions 0/695 dead transitions. [2024-06-28 04:33:28,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 695 transitions, 13170 flow [2024-06-28 04:33:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:33:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:33:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-28 04:33:28,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:33:28,968 INFO L175 Difference]: Start difference. First operand has 423 places, 648 transitions, 11222 flow. Second operand 12 states and 215 transitions. [2024-06-28 04:33:28,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 695 transitions, 13170 flow [2024-06-28 04:33:31,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 695 transitions, 12811 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 04:33:31,839 INFO L231 Difference]: Finished difference. Result has 430 places, 648 transitions, 11279 flow [2024-06-28 04:33:31,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10863, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11279, PETRI_PLACES=430, PETRI_TRANSITIONS=648} [2024-06-28 04:33:31,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-28 04:33:31,840 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 648 transitions, 11279 flow [2024-06-28 04:33:31,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:31,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:31,840 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 04:33:31,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 04:33:31,841 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 04:33:31,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:31,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1051782110, now seen corresponding path program 6 times [2024-06-28 04:33:31,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:31,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116925462] [2024-06-28 04:33:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:31,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:34,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:34,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116925462] [2024-06-28 04:33:34,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116925462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:34,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:34,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:34,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003898731] [2024-06-28 04:33:34,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:34,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:34,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:34,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:34,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:34,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 648 transitions, 11279 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:34,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:34,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:34,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:36,885 INFO L124 PetriNetUnfolderBase]: 4681/7292 cut-off events. [2024-06-28 04:33:36,885 INFO L125 PetriNetUnfolderBase]: For 1158524/1158524 co-relation queries the response was YES. [2024-06-28 04:33:36,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65656 conditions, 7292 events. 4681/7292 cut-off events. For 1158524/1158524 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 44568 event pairs, 971 based on Foata normal form. 8/7300 useless extension candidates. Maximal degree in co-relation 65459. Up to 6638 conditions per place. [2024-06-28 04:33:37,024 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 549 selfloop transitions, 139 changer transitions 0/693 dead transitions. [2024-06-28 04:33:37,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 693 transitions, 13148 flow [2024-06-28 04:33:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:33:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:33:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-28 04:33:37,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059196617336152 [2024-06-28 04:33:37,026 INFO L175 Difference]: Start difference. First operand has 430 places, 648 transitions, 11279 flow. Second operand 11 states and 192 transitions. [2024-06-28 04:33:37,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 693 transitions, 13148 flow [2024-06-28 04:33:40,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 693 transitions, 12664 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-28 04:33:40,139 INFO L231 Difference]: Finished difference. Result has 429 places, 654 transitions, 11207 flow [2024-06-28 04:33:40,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10805, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11207, PETRI_PLACES=429, PETRI_TRANSITIONS=654} [2024-06-28 04:33:40,140 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-28 04:33:40,140 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 654 transitions, 11207 flow [2024-06-28 04:33:40,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:40,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:40,140 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 04:33:40,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 04:33:40,141 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 04:33:40,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:40,141 INFO L85 PathProgramCache]: Analyzing trace with hash 553272564, now seen corresponding path program 7 times [2024-06-28 04:33:40,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:40,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756709470] [2024-06-28 04:33:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:40,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:42,673 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 04:33:42,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:42,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756709470] [2024-06-28 04:33:42,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756709470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:42,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:42,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:42,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145264406] [2024-06-28 04:33:42,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:42,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:42,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:42,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:42,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 654 transitions, 11207 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:42,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:42,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:42,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:45,211 INFO L124 PetriNetUnfolderBase]: 4657/7252 cut-off events. [2024-06-28 04:33:45,211 INFO L125 PetriNetUnfolderBase]: For 1127559/1127559 co-relation queries the response was YES. [2024-06-28 04:33:45,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63862 conditions, 7252 events. 4657/7252 cut-off events. For 1127559/1127559 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 44304 event pairs, 947 based on Foata normal form. 8/7260 useless extension candidates. Maximal degree in co-relation 63665. Up to 6622 conditions per place. [2024-06-28 04:33:45,329 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 556 selfloop transitions, 130 changer transitions 0/691 dead transitions. [2024-06-28 04:33:45,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 691 transitions, 12736 flow [2024-06-28 04:33:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:33:45,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:33:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 04:33:45,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-28 04:33:45,331 INFO L175 Difference]: Start difference. First operand has 429 places, 654 transitions, 11207 flow. Second operand 10 states and 179 transitions. [2024-06-28 04:33:45,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 691 transitions, 12736 flow [2024-06-28 04:33:48,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 691 transitions, 12475 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 04:33:48,020 INFO L231 Difference]: Finished difference. Result has 431 places, 654 transitions, 11219 flow [2024-06-28 04:33:48,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10946, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11219, PETRI_PLACES=431, PETRI_TRANSITIONS=654} [2024-06-28 04:33:48,021 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-28 04:33:48,021 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 654 transitions, 11219 flow [2024-06-28 04:33:48,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:48,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:48,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:48,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 04:33:48,022 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 04:33:48,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2040319949, now seen corresponding path program 8 times [2024-06-28 04:33:48,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:48,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288505310] [2024-06-28 04:33:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:48,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:50,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288505310] [2024-06-28 04:33:50,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288505310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:50,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:50,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:50,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509993283] [2024-06-28 04:33:50,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:50,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:50,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:50,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 654 transitions, 11219 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 04:33:50,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:50,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:50,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:53,596 INFO L124 PetriNetUnfolderBase]: 4665/7277 cut-off events. [2024-06-28 04:33:53,596 INFO L125 PetriNetUnfolderBase]: For 1114901/1114901 co-relation queries the response was YES. [2024-06-28 04:33:53,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64137 conditions, 7277 events. 4665/7277 cut-off events. For 1114901/1114901 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 44503 event pairs, 926 based on Foata normal form. 2/7279 useless extension candidates. Maximal degree in co-relation 63939. Up to 6637 conditions per place. [2024-06-28 04:33:53,707 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 583 selfloop transitions, 101 changer transitions 0/689 dead transitions. [2024-06-28 04:33:53,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 689 transitions, 12963 flow [2024-06-28 04:33:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:33:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:33:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:33:53,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-28 04:33:53,709 INFO L175 Difference]: Start difference. First operand has 431 places, 654 transitions, 11219 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:33:53,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 689 transitions, 12963 flow [2024-06-28 04:33:56,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 689 transitions, 12627 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-28 04:33:56,811 INFO L231 Difference]: Finished difference. Result has 428 places, 656 transitions, 11144 flow [2024-06-28 04:33:56,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10883, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11144, PETRI_PLACES=428, PETRI_TRANSITIONS=656} [2024-06-28 04:33:56,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-28 04:33:56,812 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 656 transitions, 11144 flow [2024-06-28 04:33:56,812 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 04:33:56,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:56,812 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] [2024-06-28 04:33:56,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 04:33:56,812 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 04:33:56,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1963211141, now seen corresponding path program 9 times [2024-06-28 04:33:56,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:56,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467681774] [2024-06-28 04:33:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:56,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:59,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:59,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467681774] [2024-06-28 04:33:59,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467681774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:59,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:59,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971487756] [2024-06-28 04:33:59,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:59,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:59,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:59,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:59,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 656 transitions, 11144 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 04:33:59,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:59,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:59,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:02,611 INFO L124 PetriNetUnfolderBase]: 4678/7294 cut-off events. [2024-06-28 04:34:02,611 INFO L125 PetriNetUnfolderBase]: For 1133468/1133468 co-relation queries the response was YES. [2024-06-28 04:34:02,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64497 conditions, 7294 events. 4678/7294 cut-off events. For 1133468/1133468 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 44738 event pairs, 1067 based on Foata normal form. 2/7296 useless extension candidates. Maximal degree in co-relation 64298. Up to 6886 conditions per place. [2024-06-28 04:34:02,728 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 603 selfloop transitions, 80 changer transitions 0/688 dead transitions. [2024-06-28 04:34:02,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 688 transitions, 12733 flow [2024-06-28 04:34:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 04:34:02,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-28 04:34:02,730 INFO L175 Difference]: Start difference. First operand has 428 places, 656 transitions, 11144 flow. Second operand 8 states and 139 transitions. [2024-06-28 04:34:02,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 688 transitions, 12733 flow [2024-06-28 04:34:05,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 688 transitions, 12543 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 04:34:05,953 INFO L231 Difference]: Finished difference. Result has 429 places, 661 transitions, 11255 flow [2024-06-28 04:34:05,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10961, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11255, PETRI_PLACES=429, PETRI_TRANSITIONS=661} [2024-06-28 04:34:05,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-28 04:34:05,954 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 661 transitions, 11255 flow [2024-06-28 04:34:05,954 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 04:34:05,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:05,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:05,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 04:34:05,955 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 04:34:05,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:05,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1957500197, now seen corresponding path program 6 times [2024-06-28 04:34:05,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:05,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741791903] [2024-06-28 04:34:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:05,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:08,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:08,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741791903] [2024-06-28 04:34:08,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741791903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:08,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:08,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:08,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857293777] [2024-06-28 04:34:08,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:08,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:08,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:08,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:34:08,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 661 transitions, 11255 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 04:34:08,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:08,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:34:08,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:11,760 INFO L124 PetriNetUnfolderBase]: 4704/7326 cut-off events. [2024-06-28 04:34:11,760 INFO L125 PetriNetUnfolderBase]: For 1106488/1106488 co-relation queries the response was YES. [2024-06-28 04:34:11,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64557 conditions, 7326 events. 4704/7326 cut-off events. For 1106488/1106488 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 44954 event pairs, 1042 based on Foata normal form. 2/7328 useless extension candidates. Maximal degree in co-relation 64359. Up to 6672 conditions per place. [2024-06-28 04:34:11,871 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 546 selfloop transitions, 161 changer transitions 0/712 dead transitions. [2024-06-28 04:34:11,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 712 transitions, 13306 flow [2024-06-28 04:34:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:34:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:34:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 04:34:11,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-28 04:34:11,873 INFO L175 Difference]: Start difference. First operand has 429 places, 661 transitions, 11255 flow. Second operand 9 states and 163 transitions. [2024-06-28 04:34:11,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 712 transitions, 13306 flow [2024-06-28 04:34:14,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 712 transitions, 13179 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 04:34:15,003 INFO L231 Difference]: Finished difference. Result has 433 places, 672 transitions, 11800 flow [2024-06-28 04:34:15,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11132, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11800, PETRI_PLACES=433, PETRI_TRANSITIONS=672} [2024-06-28 04:34:15,004 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-28 04:34:15,004 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 672 transitions, 11800 flow [2024-06-28 04:34:15,004 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 04:34:15,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:15,004 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 04:34:15,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 04:34:15,005 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 04:34:15,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:15,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1912052087, now seen corresponding path program 10 times [2024-06-28 04:34:15,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:15,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894354940] [2024-06-28 04:34:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:15,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:18,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894354940] [2024-06-28 04:34:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894354940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:18,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:18,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:18,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95310686] [2024-06-28 04:34:18,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:18,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:18,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:18,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:18,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:34:18,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 672 transitions, 11800 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 04:34:18,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:18,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:34:18,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:21,146 INFO L124 PetriNetUnfolderBase]: 4712/7341 cut-off events. [2024-06-28 04:34:21,147 INFO L125 PetriNetUnfolderBase]: For 1091953/1091953 co-relation queries the response was YES. [2024-06-28 04:34:21,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65077 conditions, 7341 events. 4712/7341 cut-off events. For 1091953/1091953 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 45046 event pairs, 1046 based on Foata normal form. 2/7343 useless extension candidates. Maximal degree in co-relation 64879. Up to 6948 conditions per place. [2024-06-28 04:34:21,253 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 613 selfloop transitions, 77 changer transitions 0/695 dead transitions. [2024-06-28 04:34:21,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 695 transitions, 13319 flow [2024-06-28 04:34:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:21,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:34:21,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-28 04:34:21,254 INFO L175 Difference]: Start difference. First operand has 433 places, 672 transitions, 11800 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:34:21,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 695 transitions, 13319 flow [2024-06-28 04:34:24,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 695 transitions, 13099 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-28 04:34:24,198 INFO L231 Difference]: Finished difference. Result has 438 places, 675 transitions, 11851 flow [2024-06-28 04:34:24,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11582, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11851, PETRI_PLACES=438, PETRI_TRANSITIONS=675} [2024-06-28 04:34:24,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-28 04:34:24,198 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 675 transitions, 11851 flow [2024-06-28 04:34:24,199 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 04:34:24,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:24,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:24,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 04:34:24,199 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 04:34:24,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:24,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2056536795, now seen corresponding path program 7 times [2024-06-28 04:34:24,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:24,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862091810] [2024-06-28 04:34:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:27,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:27,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862091810] [2024-06-28 04:34:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862091810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:27,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:27,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228905745] [2024-06-28 04:34:27,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:27,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:27,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:27,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:34:27,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 675 transitions, 11851 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 04:34:27,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:27,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:34:27,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:30,046 INFO L124 PetriNetUnfolderBase]: 4738/7396 cut-off events. [2024-06-28 04:34:30,046 INFO L125 PetriNetUnfolderBase]: For 1085594/1085596 co-relation queries the response was YES. [2024-06-28 04:34:30,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65691 conditions, 7396 events. 4738/7396 cut-off events. For 1085594/1085596 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 45350 event pairs, 940 based on Foata normal form. 4/7400 useless extension candidates. Maximal degree in co-relation 65490. Up to 5933 conditions per place. [2024-06-28 04:34:30,168 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 431 selfloop transitions, 285 changer transitions 0/721 dead transitions. [2024-06-28 04:34:30,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 721 transitions, 14234 flow [2024-06-28 04:34:30,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 04:34:30,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 04:34:30,170 INFO L175 Difference]: Start difference. First operand has 438 places, 675 transitions, 11851 flow. Second operand 8 states and 150 transitions. [2024-06-28 04:34:30,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 721 transitions, 14234 flow [2024-06-28 04:34:33,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 721 transitions, 13942 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-28 04:34:33,351 INFO L231 Difference]: Finished difference. Result has 440 places, 685 transitions, 12480 flow [2024-06-28 04:34:33,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11575, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12480, PETRI_PLACES=440, PETRI_TRANSITIONS=685} [2024-06-28 04:34:33,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-28 04:34:33,352 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 685 transitions, 12480 flow [2024-06-28 04:34:33,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:33,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:33,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:33,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 04:34:33,352 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 04:34:33,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1172600065, now seen corresponding path program 8 times [2024-06-28 04:34:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:33,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206920646] [2024-06-28 04:34:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:33,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:36,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:36,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206920646] [2024-06-28 04:34:36,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206920646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:36,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:36,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:36,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504601371] [2024-06-28 04:34:36,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:36,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:36,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:36,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:36,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:34:36,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 685 transitions, 12480 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 04:34:36,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:36,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:34:36,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:39,753 INFO L124 PetriNetUnfolderBase]: 4740/7405 cut-off events. [2024-06-28 04:34:39,753 INFO L125 PetriNetUnfolderBase]: For 1084481/1084483 co-relation queries the response was YES. [2024-06-28 04:34:39,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66053 conditions, 7405 events. 4740/7405 cut-off events. For 1084481/1084483 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 45525 event pairs, 937 based on Foata normal form. 4/7409 useless extension candidates. Maximal degree in co-relation 65853. Up to 5935 conditions per place. [2024-06-28 04:34:39,887 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 424 selfloop transitions, 291 changer transitions 0/720 dead transitions. [2024-06-28 04:34:39,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 720 transitions, 14648 flow [2024-06-28 04:34:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:34:39,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-28 04:34:39,889 INFO L175 Difference]: Start difference. First operand has 440 places, 685 transitions, 12480 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:34:39,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 720 transitions, 14648 flow [2024-06-28 04:34:43,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 720 transitions, 14086 flow, removed 119 selfloop flow, removed 4 redundant places. [2024-06-28 04:34:43,369 INFO L231 Difference]: Finished difference. Result has 444 places, 688 transitions, 12622 flow [2024-06-28 04:34:43,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11960, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12622, PETRI_PLACES=444, PETRI_TRANSITIONS=688} [2024-06-28 04:34:43,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-28 04:34:43,370 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 688 transitions, 12622 flow [2024-06-28 04:34:43,370 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 04:34:43,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:43,370 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 04:34:43,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 04:34:43,371 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 04:34:43,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:43,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1926257407, now seen corresponding path program 9 times [2024-06-28 04:34:43,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:43,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340458851] [2024-06-28 04:34:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:43,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:46,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:46,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340458851] [2024-06-28 04:34:46,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340458851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:46,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:46,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:46,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543771684] [2024-06-28 04:34:46,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:46,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:46,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:46,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:46,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:34:46,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 688 transitions, 12622 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 04:34:46,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:46,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:34:46,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:48,976 INFO L124 PetriNetUnfolderBase]: 4761/7423 cut-off events. [2024-06-28 04:34:48,977 INFO L125 PetriNetUnfolderBase]: For 1108682/1108682 co-relation queries the response was YES. [2024-06-28 04:34:49,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66596 conditions, 7423 events. 4761/7423 cut-off events. For 1108682/1108682 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 45669 event pairs, 1043 based on Foata normal form. 1/7424 useless extension candidates. Maximal degree in co-relation 66395. Up to 6932 conditions per place. [2024-06-28 04:34:49,113 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 591 selfloop transitions, 121 changer transitions 0/717 dead transitions. [2024-06-28 04:34:49,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 717 transitions, 14476 flow [2024-06-28 04:34:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:34:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:34:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 04:34:49,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-28 04:34:49,114 INFO L175 Difference]: Start difference. First operand has 444 places, 688 transitions, 12622 flow. Second operand 9 states and 148 transitions. [2024-06-28 04:34:49,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 717 transitions, 14476 flow [2024-06-28 04:34:52,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 717 transitions, 13915 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 04:34:52,357 INFO L231 Difference]: Finished difference. Result has 448 places, 694 transitions, 12500 flow [2024-06-28 04:34:52,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12072, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12500, PETRI_PLACES=448, PETRI_TRANSITIONS=694} [2024-06-28 04:34:52,358 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-28 04:34:52,358 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 694 transitions, 12500 flow [2024-06-28 04:34:52,358 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 04:34:52,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:52,358 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 04:34:52,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 04:34:52,359 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 04:34:52,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1588673859, now seen corresponding path program 11 times [2024-06-28 04:34:52,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:52,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726820287] [2024-06-28 04:34:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:52,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:55,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:55,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726820287] [2024-06-28 04:34:55,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726820287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:55,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:55,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597512939] [2024-06-28 04:34:55,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:55,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:34:55,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 694 transitions, 12500 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 04:34:55,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:55,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:34:55,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:58,227 INFO L124 PetriNetUnfolderBase]: 4756/7398 cut-off events. [2024-06-28 04:34:58,227 INFO L125 PetriNetUnfolderBase]: For 1098278/1098278 co-relation queries the response was YES. [2024-06-28 04:34:58,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65633 conditions, 7398 events. 4756/7398 cut-off events. For 1098278/1098278 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 45363 event pairs, 1059 based on Foata normal form. 2/7397 useless extension candidates. Maximal degree in co-relation 65431. Up to 7017 conditions per place. [2024-06-28 04:34:58,354 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 629 selfloop transitions, 73 changer transitions 0/707 dead transitions. [2024-06-28 04:34:58,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 707 transitions, 13946 flow [2024-06-28 04:34:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:34:58,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-28 04:34:58,355 INFO L175 Difference]: Start difference. First operand has 448 places, 694 transitions, 12500 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:34:58,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 707 transitions, 13946 flow [2024-06-28 04:35:01,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 707 transitions, 13666 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-28 04:35:01,341 INFO L231 Difference]: Finished difference. Result has 449 places, 694 transitions, 12371 flow [2024-06-28 04:35:01,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12220, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12371, PETRI_PLACES=449, PETRI_TRANSITIONS=694} [2024-06-28 04:35:01,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-28 04:35:01,341 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 694 transitions, 12371 flow [2024-06-28 04:35:01,342 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 04:35:01,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:01,342 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 04:35:01,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 04:35:01,342 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 04:35:01,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:01,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1509674309, now seen corresponding path program 10 times [2024-06-28 04:35:01,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:01,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541974840] [2024-06-28 04:35:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:01,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:04,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:04,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541974840] [2024-06-28 04:35:04,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541974840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:04,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:04,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753532305] [2024-06-28 04:35:04,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:04,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:04,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:04,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:04,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:04,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:35:04,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 694 transitions, 12371 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 04:35:04,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:04,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:35:04,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:06,877 INFO L124 PetriNetUnfolderBase]: 4766/7435 cut-off events. [2024-06-28 04:35:06,877 INFO L125 PetriNetUnfolderBase]: For 1105596/1105598 co-relation queries the response was YES. [2024-06-28 04:35:06,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65671 conditions, 7435 events. 4766/7435 cut-off events. For 1105596/1105598 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 45824 event pairs, 1061 based on Foata normal form. 4/7436 useless extension candidates. Maximal degree in co-relation 65469. Up to 5955 conditions per place. [2024-06-28 04:35:07,006 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 426 selfloop transitions, 305 changer transitions 0/736 dead transitions. [2024-06-28 04:35:07,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 736 transitions, 14938 flow [2024-06-28 04:35:07,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:07,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:35:07,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-28 04:35:07,007 INFO L175 Difference]: Start difference. First operand has 449 places, 694 transitions, 12371 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:35:07,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 736 transitions, 14938 flow [2024-06-28 04:35:09,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 736 transitions, 14624 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-28 04:35:09,991 INFO L231 Difference]: Finished difference. Result has 448 places, 704 transitions, 12989 flow [2024-06-28 04:35:09,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12057, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12989, PETRI_PLACES=448, PETRI_TRANSITIONS=704} [2024-06-28 04:35:09,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-28 04:35:09,991 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 704 transitions, 12989 flow [2024-06-28 04:35:09,992 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 04:35:09,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:09,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:09,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 04:35:09,992 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 04:35:09,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:09,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1408048349, now seen corresponding path program 11 times [2024-06-28 04:35:09,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:09,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105697699] [2024-06-28 04:35:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:09,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:12,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:12,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105697699] [2024-06-28 04:35:12,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105697699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:12,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:12,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456118371] [2024-06-28 04:35:12,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:12,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:12,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:12,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:12,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:35:12,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 704 transitions, 12989 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 04:35:12,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:12,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:35:12,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:15,703 INFO L124 PetriNetUnfolderBase]: 4768/7440 cut-off events. [2024-06-28 04:35:15,704 INFO L125 PetriNetUnfolderBase]: For 1124259/1124261 co-relation queries the response was YES. [2024-06-28 04:35:15,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66397 conditions, 7440 events. 4768/7440 cut-off events. For 1124259/1124261 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 45823 event pairs, 1058 based on Foata normal form. 4/7441 useless extension candidates. Maximal degree in co-relation 66196. Up to 5957 conditions per place. [2024-06-28 04:35:15,828 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 425 selfloop transitions, 306 changer transitions 0/736 dead transitions. [2024-06-28 04:35:15,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 736 transitions, 15356 flow [2024-06-28 04:35:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:35:15,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-28 04:35:15,846 INFO L175 Difference]: Start difference. First operand has 448 places, 704 transitions, 12989 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:35:15,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 736 transitions, 15356 flow [2024-06-28 04:35:19,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 736 transitions, 14921 flow, removed 131 selfloop flow, removed 4 redundant places. [2024-06-28 04:35:19,521 INFO L231 Difference]: Finished difference. Result has 452 places, 707 transitions, 13289 flow [2024-06-28 04:35:19,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12600, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13289, PETRI_PLACES=452, PETRI_TRANSITIONS=707} [2024-06-28 04:35:19,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-28 04:35:19,522 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 707 transitions, 13289 flow [2024-06-28 04:35:19,523 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 04:35:19,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:19,523 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 04:35:19,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 04:35:19,523 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 04:35:19,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:19,523 INFO L85 PathProgramCache]: Analyzing trace with hash 236318423, now seen corresponding path program 12 times [2024-06-28 04:35:19,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:19,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307369162] [2024-06-28 04:35:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:19,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:22,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:22,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307369162] [2024-06-28 04:35:22,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307369162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:22,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:22,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:22,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730077826] [2024-06-28 04:35:22,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:22,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:22,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:22,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:22,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:35:22,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 707 transitions, 13289 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 04:35:22,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:22,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:35:22,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:25,326 INFO L124 PetriNetUnfolderBase]: 4773/7441 cut-off events. [2024-06-28 04:35:25,326 INFO L125 PetriNetUnfolderBase]: For 1138607/1138609 co-relation queries the response was YES. [2024-06-28 04:35:25,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67123 conditions, 7441 events. 4773/7441 cut-off events. For 1138607/1138609 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45773 event pairs, 1046 based on Foata normal form. 3/7441 useless extension candidates. Maximal degree in co-relation 66920. Up to 5961 conditions per place. [2024-06-28 04:35:25,445 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 410 selfloop transitions, 318 changer transitions 0/733 dead transitions. [2024-06-28 04:35:25,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 733 transitions, 15362 flow [2024-06-28 04:35:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:35:25,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:35:25,447 INFO L175 Difference]: Start difference. First operand has 452 places, 707 transitions, 13289 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:35:25,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 733 transitions, 15362 flow [2024-06-28 04:35:28,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 733 transitions, 14720 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 04:35:28,561 INFO L231 Difference]: Finished difference. Result has 455 places, 710 transitions, 13363 flow [2024-06-28 04:35:28,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12650, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13363, PETRI_PLACES=455, PETRI_TRANSITIONS=710} [2024-06-28 04:35:28,562 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-28 04:35:28,562 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 710 transitions, 13363 flow [2024-06-28 04:35:28,562 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 04:35:28,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:28,562 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 04:35:28,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 04:35:28,562 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 04:35:28,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1556570383, now seen corresponding path program 13 times [2024-06-28 04:35:28,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:28,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114311476] [2024-06-28 04:35:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:28,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:31,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:31,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114311476] [2024-06-28 04:35:31,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114311476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:31,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:31,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:31,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877355483] [2024-06-28 04:35:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:31,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:31,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:31,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:35:31,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 710 transitions, 13363 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 04:35:31,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:31,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:35:31,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:34,074 INFO L124 PetriNetUnfolderBase]: 4786/7448 cut-off events. [2024-06-28 04:35:34,074 INFO L125 PetriNetUnfolderBase]: For 1157685/1157685 co-relation queries the response was YES. [2024-06-28 04:35:34,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67525 conditions, 7448 events. 4786/7448 cut-off events. For 1157685/1157685 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 45712 event pairs, 1057 based on Foata normal form. 1/7446 useless extension candidates. Maximal degree in co-relation 67321. Up to 6900 conditions per place. [2024-06-28 04:35:34,188 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 589 selfloop transitions, 139 changer transitions 0/733 dead transitions. [2024-06-28 04:35:34,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 733 transitions, 15391 flow [2024-06-28 04:35:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:35:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:35:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-28 04:35:34,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697674418604651 [2024-06-28 04:35:34,190 INFO L175 Difference]: Start difference. First operand has 455 places, 710 transitions, 13363 flow. Second operand 10 states and 159 transitions. [2024-06-28 04:35:34,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 733 transitions, 15391 flow [2024-06-28 04:35:37,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 733 transitions, 14764 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-28 04:35:37,397 INFO L231 Difference]: Finished difference. Result has 461 places, 713 transitions, 13124 flow [2024-06-28 04:35:37,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12742, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13124, PETRI_PLACES=461, PETRI_TRANSITIONS=713} [2024-06-28 04:35:37,398 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-28 04:35:37,398 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 713 transitions, 13124 flow [2024-06-28 04:35:37,398 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 04:35:37,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:37,398 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 04:35:37,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 04:35:37,399 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 04:35:37,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:37,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1283230285, now seen corresponding path program 14 times [2024-06-28 04:35:37,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:37,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245042141] [2024-06-28 04:35:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:37,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:40,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:40,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245042141] [2024-06-28 04:35:40,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245042141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:40,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:40,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:40,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494794476] [2024-06-28 04:35:40,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:40,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:40,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:40,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:40,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:35:40,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 713 transitions, 13124 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 04:35:40,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:40,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:35:40,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:43,252 INFO L124 PetriNetUnfolderBase]: 4783/7446 cut-off events. [2024-06-28 04:35:43,253 INFO L125 PetriNetUnfolderBase]: For 1169566/1169566 co-relation queries the response was YES. [2024-06-28 04:35:43,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66888 conditions, 7446 events. 4783/7446 cut-off events. For 1169566/1169566 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 45733 event pairs, 1059 based on Foata normal form. 1/7444 useless extension candidates. Maximal degree in co-relation 66682. Up to 6898 conditions per place. [2024-06-28 04:35:43,371 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 576 selfloop transitions, 148 changer transitions 0/729 dead transitions. [2024-06-28 04:35:43,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 729 transitions, 14841 flow [2024-06-28 04:35:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:35:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:35:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 04:35:43,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-28 04:35:43,373 INFO L175 Difference]: Start difference. First operand has 461 places, 713 transitions, 13124 flow. Second operand 9 states and 142 transitions. [2024-06-28 04:35:43,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 729 transitions, 14841 flow [2024-06-28 04:35:47,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 729 transitions, 14361 flow, removed 45 selfloop flow, removed 10 redundant places. [2024-06-28 04:35:47,381 INFO L231 Difference]: Finished difference. Result has 460 places, 713 transitions, 12948 flow [2024-06-28 04:35:47,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12646, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12948, PETRI_PLACES=460, PETRI_TRANSITIONS=713} [2024-06-28 04:35:47,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 416 predicate places. [2024-06-28 04:35:47,382 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 713 transitions, 12948 flow [2024-06-28 04:35:47,382 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 04:35:47,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:47,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:47,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 04:35:47,383 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 04:35:47,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2010385506, now seen corresponding path program 8 times [2024-06-28 04:35:47,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:47,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243312978] [2024-06-28 04:35:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:49,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:49,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243312978] [2024-06-28 04:35:49,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243312978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:49,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:49,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:49,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156904928] [2024-06-28 04:35:49,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:49,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:49,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:49,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:49,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:35:49,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 713 transitions, 12948 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:49,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:49,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:35:49,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:53,094 INFO L124 PetriNetUnfolderBase]: 4919/7691 cut-off events. [2024-06-28 04:35:53,094 INFO L125 PetriNetUnfolderBase]: For 1278116/1278124 co-relation queries the response was YES. [2024-06-28 04:35:53,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69309 conditions, 7691 events. 4919/7691 cut-off events. For 1278116/1278124 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 47503 event pairs, 887 based on Foata normal form. 16/7707 useless extension candidates. Maximal degree in co-relation 69102. Up to 6203 conditions per place. [2024-06-28 04:35:53,211 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 514 selfloop transitions, 244 changer transitions 0/763 dead transitions. [2024-06-28 04:35:53,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 763 transitions, 15314 flow [2024-06-28 04:35:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:53,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 04:35:53,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-28 04:35:53,213 INFO L175 Difference]: Start difference. First operand has 460 places, 713 transitions, 12948 flow. Second operand 8 states and 153 transitions. [2024-06-28 04:35:53,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 763 transitions, 15314 flow [2024-06-28 04:35:56,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 763 transitions, 14935 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 04:35:56,979 INFO L231 Difference]: Finished difference. Result has 460 places, 728 transitions, 13344 flow [2024-06-28 04:35:56,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12569, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13344, PETRI_PLACES=460, PETRI_TRANSITIONS=728} [2024-06-28 04:35:56,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 416 predicate places. [2024-06-28 04:35:56,980 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 728 transitions, 13344 flow [2024-06-28 04:35:56,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:56,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:56,980 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 04:35:56,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 04:35:56,980 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 04:35:56,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1108010622, now seen corresponding path program 9 times [2024-06-28 04:35:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:56,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434562863] [2024-06-28 04:35:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:56,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:59,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:59,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434562863] [2024-06-28 04:35:59,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434562863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:59,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:59,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:35:59,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639874507] [2024-06-28 04:35:59,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:59,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:35:59,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:59,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:35:59,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:35:59,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:35:59,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 728 transitions, 13344 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:59,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:59,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:35:59,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:03,551 INFO L124 PetriNetUnfolderBase]: 4895/7657 cut-off events. [2024-06-28 04:36:03,551 INFO L125 PetriNetUnfolderBase]: For 1256259/1256261 co-relation queries the response was YES. [2024-06-28 04:36:03,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69136 conditions, 7657 events. 4895/7657 cut-off events. For 1256259/1256261 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 47256 event pairs, 937 based on Foata normal form. 10/7667 useless extension candidates. Maximal degree in co-relation 68928. Up to 6187 conditions per place. [2024-06-28 04:36:03,669 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 516 selfloop transitions, 246 changer transitions 0/767 dead transitions. [2024-06-28 04:36:03,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 767 transitions, 15239 flow [2024-06-28 04:36:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:36:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:36:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-28 04:36:03,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40169133192389006 [2024-06-28 04:36:03,671 INFO L175 Difference]: Start difference. First operand has 460 places, 728 transitions, 13344 flow. Second operand 11 states and 190 transitions. [2024-06-28 04:36:03,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 767 transitions, 15239 flow [2024-06-28 04:36:07,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 767 transitions, 14849 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 04:36:07,190 INFO L231 Difference]: Finished difference. Result has 465 places, 728 transitions, 13462 flow [2024-06-28 04:36:07,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12956, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13462, PETRI_PLACES=465, PETRI_TRANSITIONS=728} [2024-06-28 04:36:07,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 421 predicate places. [2024-06-28 04:36:07,205 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 728 transitions, 13462 flow [2024-06-28 04:36:07,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:07,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:07,205 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 04:36:07,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 04:36:07,205 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 04:36:07,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:07,206 INFO L85 PathProgramCache]: Analyzing trace with hash -842587122, now seen corresponding path program 10 times [2024-06-28 04:36:07,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:07,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167992308] [2024-06-28 04:36:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:07,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:36:09,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:09,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167992308] [2024-06-28 04:36:09,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167992308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:09,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:09,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:36:09,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732357807] [2024-06-28 04:36:09,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:09,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:36:09,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:36:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:36:09,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:36:09,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 728 transitions, 13462 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:09,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:09,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:36:09,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:12,698 INFO L124 PetriNetUnfolderBase]: 4935/7672 cut-off events. [2024-06-28 04:36:12,698 INFO L125 PetriNetUnfolderBase]: For 1261307/1261307 co-relation queries the response was YES. [2024-06-28 04:36:12,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69416 conditions, 7672 events. 4935/7672 cut-off events. For 1261307/1261307 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 47139 event pairs, 987 based on Foata normal form. 8/7680 useless extension candidates. Maximal degree in co-relation 69209. Up to 6873 conditions per place. [2024-06-28 04:36:12,839 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 585 selfloop transitions, 178 changer transitions 0/768 dead transitions. [2024-06-28 04:36:12,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 768 transitions, 15483 flow [2024-06-28 04:36:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:36:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:36:12,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-28 04:36:12,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-28 04:36:12,841 INFO L175 Difference]: Start difference. First operand has 465 places, 728 transitions, 13462 flow. Second operand 10 states and 173 transitions. [2024-06-28 04:36:12,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 768 transitions, 15483 flow [2024-06-28 04:36:16,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 768 transitions, 14951 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-28 04:36:16,379 INFO L231 Difference]: Finished difference. Result has 464 places, 734 transitions, 13416 flow [2024-06-28 04:36:16,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12944, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13416, PETRI_PLACES=464, PETRI_TRANSITIONS=734} [2024-06-28 04:36:16,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 420 predicate places. [2024-06-28 04:36:16,379 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 734 transitions, 13416 flow [2024-06-28 04:36:16,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:16,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:16,380 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 04:36:16,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 04:36:16,380 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 04:36:16,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:16,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1926250308, now seen corresponding path program 11 times [2024-06-28 04:36:16,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:16,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191186704] [2024-06-28 04:36:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:16,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:36:18,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:18,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191186704] [2024-06-28 04:36:18,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191186704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:18,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:18,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:36:18,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691224423] [2024-06-28 04:36:18,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:18,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:36:18,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:18,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:36:18,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:36:18,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:36:18,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 734 transitions, 13416 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:18,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:18,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:36:18,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:21,734 INFO L124 PetriNetUnfolderBase]: 4911/7644 cut-off events. [2024-06-28 04:36:21,734 INFO L125 PetriNetUnfolderBase]: For 1208526/1208526 co-relation queries the response was YES. [2024-06-28 04:36:21,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67844 conditions, 7644 events. 4911/7644 cut-off events. For 1208526/1208526 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 47098 event pairs, 983 based on Foata normal form. 8/7652 useless extension candidates. Maximal degree in co-relation 67637. Up to 6857 conditions per place. [2024-06-28 04:36:21,869 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 595 selfloop transitions, 166 changer transitions 0/766 dead transitions. [2024-06-28 04:36:21,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 766 transitions, 15103 flow [2024-06-28 04:36:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:36:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:36:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 04:36:21,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-28 04:36:21,870 INFO L175 Difference]: Start difference. First operand has 464 places, 734 transitions, 13416 flow. Second operand 9 states and 160 transitions. [2024-06-28 04:36:21,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 766 transitions, 15103 flow [2024-06-28 04:36:25,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 766 transitions, 14787 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 04:36:25,230 INFO L231 Difference]: Finished difference. Result has 465 places, 734 transitions, 13454 flow [2024-06-28 04:36:25,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13100, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13454, PETRI_PLACES=465, PETRI_TRANSITIONS=734} [2024-06-28 04:36:25,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 421 predicate places. [2024-06-28 04:36:25,231 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 734 transitions, 13454 flow [2024-06-28 04:36:25,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:25,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:25,231 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 04:36:25,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 04:36:25,231 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:25,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:25,232 INFO L85 PathProgramCache]: Analyzing trace with hash 58762776, now seen corresponding path program 12 times [2024-06-28 04:36:25,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:25,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982707168] [2024-06-28 04:36:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:25,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:36:27,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:27,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982707168] [2024-06-28 04:36:27,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982707168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:27,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:27,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:36:27,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409968084] [2024-06-28 04:36:27,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:27,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:36:27,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:27,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:36:27,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:36:27,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:36:27,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 734 transitions, 13454 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:27,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:27,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:36:27,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:31,066 INFO L124 PetriNetUnfolderBase]: 4919/7690 cut-off events. [2024-06-28 04:36:31,067 INFO L125 PetriNetUnfolderBase]: For 1184874/1184884 co-relation queries the response was YES. [2024-06-28 04:36:31,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67568 conditions, 7690 events. 4919/7690 cut-off events. For 1184874/1184884 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 47576 event pairs, 927 based on Foata normal form. 18/7707 useless extension candidates. Maximal degree in co-relation 67361. Up to 6215 conditions per place. [2024-06-28 04:36:31,184 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 519 selfloop transitions, 246 changer transitions 0/770 dead transitions. [2024-06-28 04:36:31,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 770 transitions, 15660 flow [2024-06-28 04:36:31,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:31,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:36:31,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-28 04:36:31,186 INFO L175 Difference]: Start difference. First operand has 465 places, 734 transitions, 13454 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:36:31,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 770 transitions, 15660 flow [2024-06-28 04:36:35,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 770 transitions, 15159 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-28 04:36:35,520 INFO L231 Difference]: Finished difference. Result has 462 places, 739 transitions, 13559 flow [2024-06-28 04:36:35,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12963, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13559, PETRI_PLACES=462, PETRI_TRANSITIONS=739} [2024-06-28 04:36:35,536 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 418 predicate places. [2024-06-28 04:36:35,536 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 739 transitions, 13559 flow [2024-06-28 04:36:35,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:35,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:35,536 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 04:36:35,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 04:36:35,537 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:35,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1522523264, now seen corresponding path program 13 times [2024-06-28 04:36:35,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:35,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517908782] [2024-06-28 04:36:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:38,388 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 04:36:38,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:38,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517908782] [2024-06-28 04:36:38,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517908782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:38,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:38,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:36:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959739713] [2024-06-28 04:36:38,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:38,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:36:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:36:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:36:38,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:36:38,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 739 transitions, 13559 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:38,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:38,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:36:38,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:41,337 INFO L124 PetriNetUnfolderBase]: 4939/7728 cut-off events. [2024-06-28 04:36:41,337 INFO L125 PetriNetUnfolderBase]: For 1167873/1167875 co-relation queries the response was YES. [2024-06-28 04:36:41,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68158 conditions, 7728 events. 4939/7728 cut-off events. For 1167873/1167875 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 48155 event pairs, 1562 based on Foata normal form. 6/7734 useless extension candidates. Maximal degree in co-relation 67951. Up to 7241 conditions per place. [2024-06-28 04:36:41,483 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 717 selfloop transitions, 44 changer transitions 0/766 dead transitions. [2024-06-28 04:36:41,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 766 transitions, 15229 flow [2024-06-28 04:36:41,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:36:41,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-28 04:36:41,485 INFO L175 Difference]: Start difference. First operand has 462 places, 739 transitions, 13559 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:36:41,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 766 transitions, 15229 flow [2024-06-28 04:36:45,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 766 transitions, 14825 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 04:36:45,628 INFO L231 Difference]: Finished difference. Result has 466 places, 742 transitions, 13317 flow [2024-06-28 04:36:45,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13160, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13317, PETRI_PLACES=466, PETRI_TRANSITIONS=742} [2024-06-28 04:36:45,628 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-28 04:36:45,628 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 742 transitions, 13317 flow [2024-06-28 04:36:45,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:45,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:45,629 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 04:36:45,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 04:36:45,629 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:45,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1522077794, now seen corresponding path program 14 times [2024-06-28 04:36:45,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:45,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420396298] [2024-06-28 04:36:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:45,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:36:48,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:48,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420396298] [2024-06-28 04:36:48,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420396298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:48,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:48,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:36:48,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884697553] [2024-06-28 04:36:48,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:48,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:36:48,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:48,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:36:48,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:36:48,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:36:48,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 742 transitions, 13317 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:48,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:48,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:36:48,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:51,402 INFO L124 PetriNetUnfolderBase]: 4959/7750 cut-off events. [2024-06-28 04:36:51,402 INFO L125 PetriNetUnfolderBase]: For 1180132/1180142 co-relation queries the response was YES. [2024-06-28 04:36:51,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67557 conditions, 7750 events. 4959/7750 cut-off events. For 1180132/1180142 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 47963 event pairs, 927 based on Foata normal form. 14/7763 useless extension candidates. Maximal degree in co-relation 67348. Up to 6247 conditions per place. [2024-06-28 04:36:51,545 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 517 selfloop transitions, 250 changer transitions 0/772 dead transitions. [2024-06-28 04:36:51,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 772 transitions, 15245 flow [2024-06-28 04:36:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:36:51,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:36:51,546 INFO L175 Difference]: Start difference. First operand has 466 places, 742 transitions, 13317 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:36:51,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 772 transitions, 15245 flow [2024-06-28 04:36:55,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 772 transitions, 15111 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:36:55,461 INFO L231 Difference]: Finished difference. Result has 468 places, 745 transitions, 13752 flow [2024-06-28 04:36:55,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13183, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13752, PETRI_PLACES=468, PETRI_TRANSITIONS=745} [2024-06-28 04:36:55,469 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 424 predicate places. [2024-06-28 04:36:55,469 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 745 transitions, 13752 flow [2024-06-28 04:36:55,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:55,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:55,469 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 04:36:55,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 04:36:55,470 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:55,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:55,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1532064046, now seen corresponding path program 15 times [2024-06-28 04:36:55,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:55,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52842428] [2024-06-28 04:36:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:55,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:36:58,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:58,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52842428] [2024-06-28 04:36:58,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52842428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:58,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:58,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:58,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808463967] [2024-06-28 04:36:58,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:58,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:58,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:58,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:58,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:58,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:36:58,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 745 transitions, 13752 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:58,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:58,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:36:58,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:02,042 INFO L124 PetriNetUnfolderBase]: 4935/7720 cut-off events. [2024-06-28 04:37:02,042 INFO L125 PetriNetUnfolderBase]: For 1182413/1182415 co-relation queries the response was YES. [2024-06-28 04:37:02,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67501 conditions, 7720 events. 4935/7720 cut-off events. For 1182413/1182415 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 47826 event pairs, 1106 based on Foata normal form. 10/7729 useless extension candidates. Maximal degree in co-relation 67291. Up to 6231 conditions per place. [2024-06-28 04:37:02,165 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 507 selfloop transitions, 268 changer transitions 0/780 dead transitions. [2024-06-28 04:37:02,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 780 transitions, 15672 flow [2024-06-28 04:37:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:37:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:37:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 04:37:02,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3890063424947146 [2024-06-28 04:37:02,167 INFO L175 Difference]: Start difference. First operand has 468 places, 745 transitions, 13752 flow. Second operand 11 states and 184 transitions. [2024-06-28 04:37:02,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 780 transitions, 15672 flow [2024-06-28 04:37:06,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 780 transitions, 15273 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 04:37:06,587 INFO L231 Difference]: Finished difference. Result has 474 places, 745 transitions, 13899 flow [2024-06-28 04:37:06,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13353, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13899, PETRI_PLACES=474, PETRI_TRANSITIONS=745} [2024-06-28 04:37:06,588 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 430 predicate places. [2024-06-28 04:37:06,588 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 745 transitions, 13899 flow [2024-06-28 04:37:06,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:06,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:06,588 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 04:37:06,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 04:37:06,588 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:06,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:06,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1707851942, now seen corresponding path program 16 times [2024-06-28 04:37:06,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:06,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347505886] [2024-06-28 04:37:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:06,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:37:09,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:09,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347505886] [2024-06-28 04:37:09,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347505886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:09,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:09,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:09,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699415949] [2024-06-28 04:37:09,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:09,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:09,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:09,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:09,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:09,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:37:09,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 745 transitions, 13899 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:09,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:09,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:37:09,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:13,256 INFO L124 PetriNetUnfolderBase]: 5039/7881 cut-off events. [2024-06-28 04:37:13,257 INFO L125 PetriNetUnfolderBase]: For 1237942/1237944 co-relation queries the response was YES. [2024-06-28 04:37:13,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69770 conditions, 7881 events. 5039/7881 cut-off events. For 1237942/1237944 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 49192 event pairs, 1593 based on Foata normal form. 6/7887 useless extension candidates. Maximal degree in co-relation 69559. Up to 7309 conditions per place. [2024-06-28 04:37:13,373 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 730 selfloop transitions, 60 changer transitions 0/795 dead transitions. [2024-06-28 04:37:13,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 795 transitions, 16302 flow [2024-06-28 04:37:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:37:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:37:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 207 transitions. [2024-06-28 04:37:13,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.370304114490161 [2024-06-28 04:37:13,375 INFO L175 Difference]: Start difference. First operand has 474 places, 745 transitions, 13899 flow. Second operand 13 states and 207 transitions. [2024-06-28 04:37:13,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 795 transitions, 16302 flow [2024-06-28 04:37:17,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 795 transitions, 15728 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-28 04:37:17,141 INFO L231 Difference]: Finished difference. Result has 478 places, 757 transitions, 13722 flow [2024-06-28 04:37:17,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13347, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13722, PETRI_PLACES=478, PETRI_TRANSITIONS=757} [2024-06-28 04:37:17,142 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-28 04:37:17,142 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 757 transitions, 13722 flow [2024-06-28 04:37:17,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:17,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:17,142 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 04:37:17,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 04:37:17,142 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:17,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1923350058, now seen corresponding path program 17 times [2024-06-28 04:37:17,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:17,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218622958] [2024-06-28 04:37:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:17,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:20,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:37:20,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:20,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218622958] [2024-06-28 04:37:20,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218622958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:20,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:20,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:20,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868941532] [2024-06-28 04:37:20,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:20,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:20,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:20,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:20,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:20,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:37:20,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 757 transitions, 13722 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:20,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:20,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:37:20,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:23,153 INFO L124 PetriNetUnfolderBase]: 5027/7869 cut-off events. [2024-06-28 04:37:23,153 INFO L125 PetriNetUnfolderBase]: For 1225100/1225102 co-relation queries the response was YES. [2024-06-28 04:37:23,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68477 conditions, 7869 events. 5027/7869 cut-off events. For 1225100/1225102 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 49150 event pairs, 1591 based on Foata normal form. 6/7875 useless extension candidates. Maximal degree in co-relation 68264. Up to 7301 conditions per place. [2024-06-28 04:37:23,287 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 723 selfloop transitions, 60 changer transitions 0/788 dead transitions. [2024-06-28 04:37:23,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 788 transitions, 15616 flow [2024-06-28 04:37:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:37:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:37:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-28 04:37:23,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763213530655391 [2024-06-28 04:37:23,289 INFO L175 Difference]: Start difference. First operand has 478 places, 757 transitions, 13722 flow. Second operand 11 states and 178 transitions. [2024-06-28 04:37:23,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 788 transitions, 15616 flow [2024-06-28 04:37:27,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 788 transitions, 15309 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-06-28 04:37:27,377 INFO L231 Difference]: Finished difference. Result has 479 places, 757 transitions, 13541 flow [2024-06-28 04:37:27,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13415, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13541, PETRI_PLACES=479, PETRI_TRANSITIONS=757} [2024-06-28 04:37:27,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 435 predicate places. [2024-06-28 04:37:27,377 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 757 transitions, 13541 flow [2024-06-28 04:37:27,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:27,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:27,378 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 04:37:27,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 04:37:27,378 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:27,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:27,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1909534908, now seen corresponding path program 18 times [2024-06-28 04:37:27,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:27,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585252617] [2024-06-28 04:37:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:27,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:37:30,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:30,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585252617] [2024-06-28 04:37:30,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585252617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:30,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:30,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:30,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17814587] [2024-06-28 04:37:30,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:30,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:30,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:30,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:37:30,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 757 transitions, 13541 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:30,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:30,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:37:30,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:33,817 INFO L124 PetriNetUnfolderBase]: 5047/7885 cut-off events. [2024-06-28 04:37:33,817 INFO L125 PetriNetUnfolderBase]: For 1234696/1234698 co-relation queries the response was YES. [2024-06-28 04:37:33,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68677 conditions, 7885 events. 5047/7885 cut-off events. For 1234696/1234698 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 48827 event pairs, 1044 based on Foata normal form. 6/7890 useless extension candidates. Maximal degree in co-relation 68465. Up to 6311 conditions per place. [2024-06-28 04:37:33,951 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 509 selfloop transitions, 282 changer transitions 0/796 dead transitions. [2024-06-28 04:37:33,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 796 transitions, 16007 flow [2024-06-28 04:37:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:37:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:37:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-28 04:37:33,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40169133192389006 [2024-06-28 04:37:33,952 INFO L175 Difference]: Start difference. First operand has 479 places, 757 transitions, 13541 flow. Second operand 11 states and 190 transitions. [2024-06-28 04:37:33,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 796 transitions, 16007 flow [2024-06-28 04:37:38,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 796 transitions, 15887 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 04:37:38,633 INFO L231 Difference]: Finished difference. Result has 480 places, 760 transitions, 14060 flow [2024-06-28 04:37:38,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13421, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14060, PETRI_PLACES=480, PETRI_TRANSITIONS=760} [2024-06-28 04:37:38,648 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 436 predicate places. [2024-06-28 04:37:38,648 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 760 transitions, 14060 flow [2024-06-28 04:37:38,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:38,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:38,649 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] [2024-06-28 04:37:38,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 04:37:38,649 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:38,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:38,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1909540488, now seen corresponding path program 19 times [2024-06-28 04:37:38,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:38,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325154292] [2024-06-28 04:37:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:38,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:37:41,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:41,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325154292] [2024-06-28 04:37:41,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325154292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:41,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:41,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:41,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957469364] [2024-06-28 04:37:41,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:41,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:41,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:41,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:41,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:41,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:37:41,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 760 transitions, 14060 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:41,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:41,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:37:41,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:45,088 INFO L124 PetriNetUnfolderBase]: 5035/7869 cut-off events. [2024-06-28 04:37:45,089 INFO L125 PetriNetUnfolderBase]: For 1235435/1235437 co-relation queries the response was YES. [2024-06-28 04:37:45,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69247 conditions, 7869 events. 5035/7869 cut-off events. For 1235435/1235437 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 48785 event pairs, 1040 based on Foata normal form. 6/7874 useless extension candidates. Maximal degree in co-relation 69034. Up to 6303 conditions per place. [2024-06-28 04:37:45,217 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 509 selfloop transitions, 284 changer transitions 0/798 dead transitions. [2024-06-28 04:37:45,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 798 transitions, 16471 flow [2024-06-28 04:37:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:37:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:37:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-28 04:37:45,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-28 04:37:45,219 INFO L175 Difference]: Start difference. First operand has 480 places, 760 transitions, 14060 flow. Second operand 12 states and 202 transitions. [2024-06-28 04:37:45,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 798 transitions, 16471 flow [2024-06-28 04:37:50,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 798 transitions, 15801 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-28 04:37:50,257 INFO L231 Difference]: Finished difference. Result has 485 places, 760 transitions, 13964 flow [2024-06-28 04:37:50,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13390, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13964, PETRI_PLACES=485, PETRI_TRANSITIONS=760} [2024-06-28 04:37:50,257 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 441 predicate places. [2024-06-28 04:37:50,257 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 760 transitions, 13964 flow [2024-06-28 04:37:50,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:50,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:50,258 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 04:37:50,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 04:37:50,258 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:50,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:50,258 INFO L85 PathProgramCache]: Analyzing trace with hash 244599732, now seen corresponding path program 20 times [2024-06-28 04:37:50,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:50,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113256568] [2024-06-28 04:37:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:50,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:37:53,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:53,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113256568] [2024-06-28 04:37:53,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113256568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:53,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:53,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:53,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199671125] [2024-06-28 04:37:53,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:53,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:53,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:53,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:53,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:53,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:37:53,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 760 transitions, 13964 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:53,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:53,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:37:53,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15