./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_power.oepc.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/safe015_power.oepc.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/safe015_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe015_power.oepc.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 04:09:23,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:09:23,803 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:09:23,806 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:09:23,807 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:09:23,824 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:09:23,825 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:09:23,825 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:09:23,826 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:09:23,826 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:09:23,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:09:23,827 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:09:23,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:09:23,827 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:09:23,828 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:09:23,828 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:09:23,828 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:09:23,829 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:09:23,829 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:09:23,829 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:09:23,830 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:09:23,830 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:09:23,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:09:23,831 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:09:23,831 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:09:23,831 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:09:23,832 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:09:23,832 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:09:23,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:09:23,833 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:09:23,833 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:09:23,833 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:09:23,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:09:23,834 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:09:23,834 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:09:23,835 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:09:23,835 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:09:23,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:09:23,836 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:09:23,836 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:09:23,836 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:09:23,844 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:09:23,845 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:09:23,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:09:24,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:09:24,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:09:24,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:09:24,132 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:09:24,132 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:09:24,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_power.oepc.i [2024-06-28 04:09:25,235 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:09:25,456 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:09:25,457 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_power.oepc.i [2024-06-28 04:09:25,475 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed110f6b7/c91cb8ab9f864a289a707712018c5091/FLAG5f9b34edf [2024-06-28 04:09:25,486 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed110f6b7/c91cb8ab9f864a289a707712018c5091 [2024-06-28 04:09:25,489 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:09:25,489 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:09:25,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe015_power.oepc.yml/witness.yml [2024-06-28 04:09:25,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:09:25,728 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:09:25,730 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:09:25,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:09:25,735 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:09:25,736 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:09:25" (1/2) ... [2024-06-28 04:09:25,737 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19aa7942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:09:25, skipping insertion in model container [2024-06-28 04:09:25,738 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:09:25" (1/2) ... [2024-06-28 04:09:25,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a829676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:09:25, skipping insertion in model container [2024-06-28 04:09:25,739 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:09:25" (2/2) ... [2024-06-28 04:09:25,740 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19aa7942 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:25, skipping insertion in model container [2024-06-28 04:09:25,740 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:09:25" (2/2) ... [2024-06-28 04:09:25,740 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:09:25,871 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:09:25,873 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((((((((((! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_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$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-28 04:09:25,873 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((((((((((! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p2_EAX$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_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$mem_tmp == 2)) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-28 04:09:25,873 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] (((((((((((((((((((((((((((((((! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_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$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-28 04:09:25,873 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:09:25,874 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-28 04:09:25,921 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:09:26,306 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:09:26,316 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:09:26,495 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:09:26,529 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:09:26,529 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26 WrapperNode [2024-06-28 04:09:26,529 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:09:26,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:09:26,530 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:09:26,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:09:26,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,579 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,633 INFO L138 Inliner]: procedures = 175, calls = 111, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 341 [2024-06-28 04:09:26,634 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:09:26,634 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:09:26,634 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:09:26,635 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:09:26,646 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,663 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,711 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-28 04:09:26,724 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,724 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,774 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,776 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,781 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,787 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:09:26,800 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:09:26,801 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:09:26,801 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:09:26,802 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (1/1) ... [2024-06-28 04:09:26,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:09:26,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:09:26,837 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 04:09:26,859 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 04:09:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 04:09:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 04:09:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 04:09:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 04:09:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:09:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:09:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:09:26,882 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:09:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:09:26,882 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:09:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:09:26,882 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:09:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:09:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 04:09:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:09:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:09:26,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:09:26,887 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 04:09:27,078 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:09:27,080 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:09:27,805 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:09:27,805 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:09:28,396 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:09:28,396 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:09:28,396 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:09:28 BoogieIcfgContainer [2024-06-28 04:09:28,397 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:09:28,400 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:09:28,400 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:09:28,402 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:09:28,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:09:25" (1/4) ... [2024-06-28 04:09:28,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2298f38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:09:28, skipping insertion in model container [2024-06-28 04:09:28,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:09:25" (2/4) ... [2024-06-28 04:09:28,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2298f38f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:09:28, skipping insertion in model container [2024-06-28 04:09:28,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:09:26" (3/4) ... [2024-06-28 04:09:28,404 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2298f38f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:09:28, skipping insertion in model container [2024-06-28 04:09:28,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:09:28" (4/4) ... [2024-06-28 04:09:28,405 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_power.oepc.i [2024-06-28 04:09:28,422 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:09:28,422 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 04:09:28,422 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:09:28,510 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:09:28,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 04:09:28,581 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-28 04:09:28,582 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:09:28,584 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 04:09:28,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 04:09:28,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-28 04:09:28,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:09:28,606 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;@1d600a34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:09:28,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 04:09:28,612 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:09:28,612 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 04:09:28,612 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:09:28,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:28,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:09:28,614 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 04:09:28,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:28,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1083369642, now seen corresponding path program 1 times [2024-06-28 04:09:28,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:28,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637958717] [2024-06-28 04:09:28,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:28,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:30,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:30,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637958717] [2024-06-28 04:09:30,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637958717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:30,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:30,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:09:30,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621309712] [2024-06-28 04:09:30,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:30,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:09:30,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:09:30,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:09:30,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:09:30,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:30,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:30,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:09:30,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:31,468 INFO L124 PetriNetUnfolderBase]: 1412/2149 cut-off events. [2024-06-28 04:09:31,469 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 04:09:31,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 2149 events. 1412/2149 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10299 event pairs, 956 based on Foata normal form. 1/2113 useless extension candidates. Maximal degree in co-relation 4339. Up to 2115 conditions per place. [2024-06-28 04:09:31,485 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-28 04:09:31,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 187 flow [2024-06-28 04:09:31,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:09:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:09:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-28 04:09:31,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-06-28 04:09:31,497 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 70 transitions. [2024-06-28 04:09:31,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 187 flow [2024-06-28 04:09:31,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:09:31,502 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-28 04:09:31,504 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 04:09:31,507 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-28 04:09:31,507 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-28 04:09:31,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:31,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:31,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:31,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:09:31,508 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 04:09:31,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:31,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1736206633, now seen corresponding path program 1 times [2024-06-28 04:09:31,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:31,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685459019] [2024-06-28 04:09:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:31,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:33,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:33,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685459019] [2024-06-28 04:09:33,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685459019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:33,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:33,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 04:09:33,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821151528] [2024-06-28 04:09:33,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:33,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 04:09:33,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:33,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 04:09:33,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 04:09:33,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:09:33,131 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 04:09:33,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:33,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:09:33,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:33,820 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-28 04:09:33,820 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-28 04:09:33,824 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 10207 event pairs, 654 based on Foata normal form. 6/2134 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-28 04:09:33,833 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-28 04:09:33,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-28 04:09:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:09:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:09:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-28 04:09:33,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-28 04:09:33,835 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-28 04:09:33,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-28 04:09:33,836 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 04:09:33,838 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-28 04:09:33,838 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 04:09:33,839 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-28 04:09:33,839 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-28 04:09:33,839 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 04:09:33,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:33,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:33,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:09:33,840 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 04:09:33,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 390862375, now seen corresponding path program 1 times [2024-06-28 04:09:33,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:33,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932367345] [2024-06-28 04:09:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:33,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:36,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:36,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932367345] [2024-06-28 04:09:36,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932367345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:36,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:36,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:09:36,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308431701] [2024-06-28 04:09:36,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:36,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:09:36,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:36,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:09:36,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:09:36,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:09:36,474 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 04:09:36,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:36,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:09:36,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:37,454 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-28 04:09:37,455 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-28 04:09:37,459 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 10096 event pairs, 485 based on Foata normal form. 6/2119 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-28 04:09:37,471 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-28 04:09:37,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-28 04:09:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:09:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:09:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-28 04:09:37,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-28 04:09:37,479 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-28 04:09:37,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-28 04:09:37,482 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 04:09:37,483 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-28 04:09:37,483 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 04:09:37,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-28 04:09:37,485 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-28 04:09:37,485 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 04:09:37,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:37,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:37,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:09:37,486 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 04:09:37,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:37,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1904657385, now seen corresponding path program 1 times [2024-06-28 04:09:37,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:37,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436526303] [2024-06-28 04:09:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:37,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:39,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:39,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436526303] [2024-06-28 04:09:39,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436526303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:39,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:39,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:09:39,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267967545] [2024-06-28 04:09:39,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:39,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:09:39,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:39,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:09:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:09:39,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:09:39,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:39,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:39,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:09:39,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:39,964 INFO L124 PetriNetUnfolderBase]: 1386/2109 cut-off events. [2024-06-28 04:09:39,965 INFO L125 PetriNetUnfolderBase]: For 2157/2157 co-relation queries the response was YES. [2024-06-28 04:09:39,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5895 conditions, 2109 events. 1386/2109 cut-off events. For 2157/2157 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10057 event pairs, 597 based on Foata normal form. 2/2108 useless extension candidates. Maximal degree in co-relation 5878. Up to 2064 conditions per place. [2024-06-28 04:09:39,976 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-28 04:09:39,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 343 flow [2024-06-28 04:09:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:09:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:09:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-28 04:09:39,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:09:39,978 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 90 transitions. [2024-06-28 04:09:39,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 343 flow [2024-06-28 04:09:39,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 316 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:09:39,984 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-28 04:09:39,985 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-28 04:09:39,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-28 04:09:39,986 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-28 04:09:39,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:39,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:39,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:39,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:09:39,987 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 04:09:39,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1085164899, now seen corresponding path program 1 times [2024-06-28 04:09:39,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:39,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553046418] [2024-06-28 04:09:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:39,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:40,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:40,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553046418] [2024-06-28 04:09:40,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553046418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:40,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:40,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 04:09:40,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259984489] [2024-06-28 04:09:40,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:40,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:09:40,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:40,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:09:40,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:09:40,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-28 04:09:40,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:40,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:40,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-28 04:09:40,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:40,464 INFO L124 PetriNetUnfolderBase]: 717/1268 cut-off events. [2024-06-28 04:09:40,464 INFO L125 PetriNetUnfolderBase]: For 1670/1705 co-relation queries the response was YES. [2024-06-28 04:09:40,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3624 conditions, 1268 events. 717/1268 cut-off events. For 1670/1705 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7231 event pairs, 322 based on Foata normal form. 105/1300 useless extension candidates. Maximal degree in co-relation 3606. Up to 776 conditions per place. [2024-06-28 04:09:40,475 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 34 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-28 04:09:40,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 339 flow [2024-06-28 04:09:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:09:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:09:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-28 04:09:40,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-28 04:09:40,479 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 3 states and 78 transitions. [2024-06-28 04:09:40,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 339 flow [2024-06-28 04:09:40,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 320 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:09:40,487 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 235 flow [2024-06-28 04:09:40,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-28 04:09:40,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-28 04:09:40,488 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 235 flow [2024-06-28 04:09:40,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:40,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:40,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:40,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:09:40,489 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 04:09:40,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash -719870856, now seen corresponding path program 1 times [2024-06-28 04:09:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:40,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530787366] [2024-06-28 04:09:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:42,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:42,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530787366] [2024-06-28 04:09:42,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530787366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:42,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:42,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:09:42,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826865940] [2024-06-28 04:09:42,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:42,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:09:42,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:09:42,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:09:42,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:09:42,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 235 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 04:09:42,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:42,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:09:42,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:43,553 INFO L124 PetriNetUnfolderBase]: 1519/2370 cut-off events. [2024-06-28 04:09:43,554 INFO L125 PetriNetUnfolderBase]: For 5035/5035 co-relation queries the response was YES. [2024-06-28 04:09:43,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7812 conditions, 2370 events. 1519/2370 cut-off events. For 5035/5035 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11969 event pairs, 667 based on Foata normal form. 4/2371 useless extension candidates. Maximal degree in co-relation 7794. Up to 2277 conditions per place. [2024-06-28 04:09:43,574 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-28 04:09:43,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 480 flow [2024-06-28 04:09:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:09:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:09:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-28 04:09:43,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-28 04:09:43,576 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 235 flow. Second operand 6 states and 111 transitions. [2024-06-28 04:09:43,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 480 flow [2024-06-28 04:09:43,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 462 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 04:09:43,584 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-28 04:09:43,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-28 04:09:43,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-28 04:09:43,587 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-28 04:09:43,587 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 04:09:43,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:43,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:43,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:09:43,588 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 04:09:43,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash -193226736, now seen corresponding path program 2 times [2024-06-28 04:09:43,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:43,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495458131] [2024-06-28 04:09:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:43,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:45,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:45,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495458131] [2024-06-28 04:09:45,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495458131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:45,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:45,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:09:45,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832660864] [2024-06-28 04:09:45,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:45,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:09:45,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:45,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:09:45,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:09:45,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:09:45,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 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 04:09:45,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:45,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:09:45,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:46,490 INFO L124 PetriNetUnfolderBase]: 1511/2351 cut-off events. [2024-06-28 04:09:46,491 INFO L125 PetriNetUnfolderBase]: For 6082/6082 co-relation queries the response was YES. [2024-06-28 04:09:46,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8124 conditions, 2351 events. 1511/2351 cut-off events. For 6082/6082 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11895 event pairs, 674 based on Foata normal form. 4/2349 useless extension candidates. Maximal degree in co-relation 8103. Up to 2232 conditions per place. [2024-06-28 04:09:46,506 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-28 04:09:46,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 541 flow [2024-06-28 04:09:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:09:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:09:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 04:09:46,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-28 04:09:46,508 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 6 states and 110 transitions. [2024-06-28 04:09:46,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 541 flow [2024-06-28 04:09:46,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 502 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 04:09:46,514 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 351 flow [2024-06-28 04:09:46,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-28 04:09:46,514 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-28 04:09:46,515 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 351 flow [2024-06-28 04:09:46,515 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 04:09:46,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:46,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:46,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:09:46,516 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 04:09:46,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash -257694857, now seen corresponding path program 1 times [2024-06-28 04:09:46,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:46,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183031032] [2024-06-28 04:09:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:46,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:48,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:48,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183031032] [2024-06-28 04:09:48,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183031032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:48,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:48,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:09:48,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945423976] [2024-06-28 04:09:48,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:48,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:09:48,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:48,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:09:48,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:09:48,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:09:48,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 351 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 04:09:48,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:48,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:09:48,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:49,919 INFO L124 PetriNetUnfolderBase]: 1563/2452 cut-off events. [2024-06-28 04:09:49,919 INFO L125 PetriNetUnfolderBase]: For 8346/8346 co-relation queries the response was YES. [2024-06-28 04:09:49,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9014 conditions, 2452 events. 1563/2452 cut-off events. For 8346/8346 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12524 event pairs, 665 based on Foata normal form. 2/2451 useless extension candidates. Maximal degree in co-relation 8992. Up to 2310 conditions per place. [2024-06-28 04:09:49,931 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 78 selfloop transitions, 23 changer transitions 0/106 dead transitions. [2024-06-28 04:09:49,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 726 flow [2024-06-28 04:09:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:09:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:09:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:09:49,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-28 04:09:49,934 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 351 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:09:49,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 726 flow [2024-06-28 04:09:49,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 106 transitions, 663 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 04:09:49,941 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 452 flow [2024-06-28 04:09:49,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=452, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2024-06-28 04:09:49,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-28 04:09:49,942 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 452 flow [2024-06-28 04:09:49,943 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 04:09:49,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:49,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:49,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:09:49,943 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 04:09:49,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:49,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1852971767, now seen corresponding path program 2 times [2024-06-28 04:09:49,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:49,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828583709] [2024-06-28 04:09:49,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:49,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:52,318 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 04:09:52,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:52,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828583709] [2024-06-28 04:09:52,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828583709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:52,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:52,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:09:52,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664058138] [2024-06-28 04:09:52,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:52,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:09:52,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:52,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:09:52,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:09:52,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:09:52,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 452 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 04:09:52,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:52,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:09:52,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:53,493 INFO L124 PetriNetUnfolderBase]: 1560/2447 cut-off events. [2024-06-28 04:09:53,494 INFO L125 PetriNetUnfolderBase]: For 10329/10329 co-relation queries the response was YES. [2024-06-28 04:09:53,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9481 conditions, 2447 events. 1560/2447 cut-off events. For 10329/10329 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12449 event pairs, 664 based on Foata normal form. 2/2446 useless extension candidates. Maximal degree in co-relation 9456. Up to 2288 conditions per place. [2024-06-28 04:09:53,506 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 76 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-28 04:09:53,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 105 transitions, 776 flow [2024-06-28 04:09:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:09:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:09:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 04:09:53,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:09:53,508 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 452 flow. Second operand 7 states and 129 transitions. [2024-06-28 04:09:53,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 105 transitions, 776 flow [2024-06-28 04:09:53,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 105 transitions, 735 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 04:09:53,516 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 502 flow [2024-06-28 04:09:53,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-28 04:09:53,516 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-28 04:09:53,517 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 502 flow [2024-06-28 04:09:53,517 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 04:09:53,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:53,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:53,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:09:53,517 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:09:53,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1717362663, now seen corresponding path program 1 times [2024-06-28 04:09:53,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:53,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154496250] [2024-06-28 04:09:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:53,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:55,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:55,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154496250] [2024-06-28 04:09:55,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154496250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:55,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:55,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:09:55,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850524127] [2024-06-28 04:09:55,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:55,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:09:55,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:55,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:09:55,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:09:55,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:09:55,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 502 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:55,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:55,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:09:55,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:56,841 INFO L124 PetriNetUnfolderBase]: 1557/2440 cut-off events. [2024-06-28 04:09:56,842 INFO L125 PetriNetUnfolderBase]: For 12918/12920 co-relation queries the response was YES. [2024-06-28 04:09:56,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9880 conditions, 2440 events. 1557/2440 cut-off events. For 12918/12920 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12480 event pairs, 669 based on Foata normal form. 1/2438 useless extension candidates. Maximal degree in co-relation 9854. Up to 2376 conditions per place. [2024-06-28 04:09:56,858 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 73 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2024-06-28 04:09:56,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 86 transitions, 710 flow [2024-06-28 04:09:56,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:09:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:09:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-28 04:09:56,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:09:56,860 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 502 flow. Second operand 5 states and 85 transitions. [2024-06-28 04:09:56,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 86 transitions, 710 flow [2024-06-28 04:09:56,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 86 transitions, 643 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 04:09:56,872 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 481 flow [2024-06-28 04:09:56,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=481, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-28 04:09:56,873 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-28 04:09:56,873 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 481 flow [2024-06-28 04:09:56,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:56,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:56,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:56,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:09:56,874 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 04:09:56,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2038692529, now seen corresponding path program 1 times [2024-06-28 04:09:56,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:56,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151404422] [2024-06-28 04:09:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:56,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:57,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:57,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151404422] [2024-06-28 04:09:57,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151404422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:57,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:57,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:09:57,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557862936] [2024-06-28 04:09:57,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:57,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:09:57,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:57,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:09:57,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:09:57,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-28 04:09:57,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 481 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 04:09:57,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:57,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-28 04:09:57,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:57,388 INFO L124 PetriNetUnfolderBase]: 815/1533 cut-off events. [2024-06-28 04:09:57,388 INFO L125 PetriNetUnfolderBase]: For 7788/7839 co-relation queries the response was YES. [2024-06-28 04:09:57,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5914 conditions, 1533 events. 815/1533 cut-off events. For 7788/7839 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9096 event pairs, 308 based on Foata normal form. 70/1530 useless extension candidates. Maximal degree in co-relation 5887. Up to 772 conditions per place. [2024-06-28 04:09:57,397 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 38 selfloop transitions, 25 changer transitions 0/84 dead transitions. [2024-06-28 04:09:57,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 639 flow [2024-06-28 04:09:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:09:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:09:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-28 04:09:57,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-28 04:09:57,399 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 481 flow. Second operand 5 states and 101 transitions. [2024-06-28 04:09:57,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 639 flow [2024-06-28 04:09:57,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 617 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 04:09:57,406 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 532 flow [2024-06-28 04:09:57,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=532, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-28 04:09:57,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-28 04:09:57,407 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 532 flow [2024-06-28 04:09:57,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 04:09:57,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:57,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:57,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:09:57,408 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:09:57,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:57,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1663509575, now seen corresponding path program 1 times [2024-06-28 04:09:57,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:57,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842583375] [2024-06-28 04:09:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:57,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:59,913 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 04:09:59,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:59,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842583375] [2024-06-28 04:09:59,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842583375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:59,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:59,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:09:59,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478449929] [2024-06-28 04:09:59,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:59,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:09:59,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:59,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:09:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:09:59,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:09:59,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 532 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 04:09:59,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:59,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:09:59,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:00,916 INFO L124 PetriNetUnfolderBase]: 1496/2377 cut-off events. [2024-06-28 04:10:00,916 INFO L125 PetriNetUnfolderBase]: For 14157/14157 co-relation queries the response was YES. [2024-06-28 04:10:00,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10128 conditions, 2377 events. 1496/2377 cut-off events. For 14157/14157 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12284 event pairs, 608 based on Foata normal form. 6/2366 useless extension candidates. Maximal degree in co-relation 10100. Up to 2163 conditions per place. [2024-06-28 04:10:00,934 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 68 selfloop transitions, 27 changer transitions 0/100 dead transitions. [2024-06-28 04:10:00,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 100 transitions, 860 flow [2024-06-28 04:10:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:10:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:10:00,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 04:10:00,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-28 04:10:00,936 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 532 flow. Second operand 6 states and 107 transitions. [2024-06-28 04:10:00,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 100 transitions, 860 flow [2024-06-28 04:10:00,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 100 transitions, 857 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 04:10:00,947 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 680 flow [2024-06-28 04:10:00,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=680, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-28 04:10:00,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-28 04:10:00,948 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 680 flow [2024-06-28 04:10:00,948 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 04:10:00,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:00,949 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 04:10:00,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:10:00,949 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 04:10:00,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1484788584, now seen corresponding path program 1 times [2024-06-28 04:10:00,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:00,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293754163] [2024-06-28 04:10:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:00,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:03,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:03,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293754163] [2024-06-28 04:10:03,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293754163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:03,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:03,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:10:03,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691329566] [2024-06-28 04:10:03,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:03,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:10:03,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:03,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:10:03,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:10:03,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:03,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 680 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 04:10:03,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:03,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:03,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:04,536 INFO L124 PetriNetUnfolderBase]: 1504/2406 cut-off events. [2024-06-28 04:10:04,536 INFO L125 PetriNetUnfolderBase]: For 17571/17571 co-relation queries the response was YES. [2024-06-28 04:10:04,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11206 conditions, 2406 events. 1504/2406 cut-off events. For 17571/17571 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12488 event pairs, 501 based on Foata normal form. 4/2407 useless extension candidates. Maximal degree in co-relation 11175. Up to 2175 conditions per place. [2024-06-28 04:10:04,550 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 96 selfloop transitions, 23 changer transitions 0/124 dead transitions. [2024-06-28 04:10:04,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 124 transitions, 1053 flow [2024-06-28 04:10:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:10:04,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:10:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:10:04,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-28 04:10:04,552 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 680 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:10:04,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 124 transitions, 1053 flow [2024-06-28 04:10:04,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 124 transitions, 1013 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 04:10:04,568 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 715 flow [2024-06-28 04:10:04,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=715, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2024-06-28 04:10:04,569 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-28 04:10:04,569 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 715 flow [2024-06-28 04:10:04,569 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 04:10:04,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:04,569 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 04:10:04,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:10:04,569 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 04:10:04,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:04,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1595282728, now seen corresponding path program 2 times [2024-06-28 04:10:04,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:04,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384928315] [2024-06-28 04:10:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:04,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:07,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:07,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384928315] [2024-06-28 04:10:07,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384928315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:07,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:07,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:10:07,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709535592] [2024-06-28 04:10:07,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:07,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:10:07,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:07,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:10:07,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:10:07,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:07,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 715 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 04:10:07,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:07,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:07,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:08,189 INFO L124 PetriNetUnfolderBase]: 1500/2398 cut-off events. [2024-06-28 04:10:08,189 INFO L125 PetriNetUnfolderBase]: For 19553/19553 co-relation queries the response was YES. [2024-06-28 04:10:08,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11391 conditions, 2398 events. 1500/2398 cut-off events. For 19553/19553 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12503 event pairs, 619 based on Foata normal form. 4/2399 useless extension candidates. Maximal degree in co-relation 11358. Up to 2193 conditions per place. [2024-06-28 04:10:08,205 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 25 changer transitions 0/123 dead transitions. [2024-06-28 04:10:08,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 123 transitions, 1063 flow [2024-06-28 04:10:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:10:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:10:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:10:08,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:10:08,207 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 715 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:10:08,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 123 transitions, 1063 flow [2024-06-28 04:10:08,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 1005 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:10:08,226 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 714 flow [2024-06-28 04:10:08,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=714, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2024-06-28 04:10:08,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-28 04:10:08,227 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 714 flow [2024-06-28 04:10:08,227 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 04:10:08,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:08,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:10:08,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:10:08,228 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:08,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1590219432, now seen corresponding path program 3 times [2024-06-28 04:10:08,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:08,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734387225] [2024-06-28 04:10:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:08,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:10,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:10,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734387225] [2024-06-28 04:10:10,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734387225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:10,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:10,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:10:10,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510238111] [2024-06-28 04:10:10,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:10,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:10:10,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:10:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:10:10,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:10,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 714 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 04:10:10,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:10,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:10,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:11,594 INFO L124 PetriNetUnfolderBase]: 1508/2418 cut-off events. [2024-06-28 04:10:11,594 INFO L125 PetriNetUnfolderBase]: For 22052/22052 co-relation queries the response was YES. [2024-06-28 04:10:11,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11683 conditions, 2418 events. 1508/2418 cut-off events. For 22052/22052 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12650 event pairs, 619 based on Foata normal form. 4/2419 useless extension candidates. Maximal degree in co-relation 11649. Up to 2260 conditions per place. [2024-06-28 04:10:11,607 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 101 selfloop transitions, 16 changer transitions 0/122 dead transitions. [2024-06-28 04:10:11,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 1075 flow [2024-06-28 04:10:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:10:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:10:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 04:10:11,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-28 04:10:11,609 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 714 flow. Second operand 8 states and 139 transitions. [2024-06-28 04:10:11,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 1075 flow [2024-06-28 04:10:11,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 122 transitions, 1012 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 04:10:11,629 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 720 flow [2024-06-28 04:10:11,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=720, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-06-28 04:10:11,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-28 04:10:11,630 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 720 flow [2024-06-28 04:10:11,630 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 04:10:11,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:11,631 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 04:10:11,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:10:11,631 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:11,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:11,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1825369318, now seen corresponding path program 1 times [2024-06-28 04:10:11,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:11,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241397903] [2024-06-28 04:10:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:11,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:13,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:13,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241397903] [2024-06-28 04:10:13,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241397903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:13,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:13,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:10:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600812454] [2024-06-28 04:10:13,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:10:13,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:13,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:10:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:10:13,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:13,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 720 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 04:10:13,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:13,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:13,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:14,983 INFO L124 PetriNetUnfolderBase]: 1518/2436 cut-off events. [2024-06-28 04:10:14,983 INFO L125 PetriNetUnfolderBase]: For 24715/24717 co-relation queries the response was YES. [2024-06-28 04:10:14,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11982 conditions, 2436 events. 1518/2436 cut-off events. For 24715/24717 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12763 event pairs, 620 based on Foata normal form. 2/2435 useless extension candidates. Maximal degree in co-relation 11946. Up to 2201 conditions per place. [2024-06-28 04:10:14,996 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 79 selfloop transitions, 30 changer transitions 0/114 dead transitions. [2024-06-28 04:10:14,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 114 transitions, 1083 flow [2024-06-28 04:10:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:10:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:10:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-28 04:10:14,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-28 04:10:14,998 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 720 flow. Second operand 6 states and 116 transitions. [2024-06-28 04:10:14,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 114 transitions, 1083 flow [2024-06-28 04:10:15,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 114 transitions, 1039 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:10:15,025 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 785 flow [2024-06-28 04:10:15,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=785, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-06-28 04:10:15,026 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-28 04:10:15,026 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 785 flow [2024-06-28 04:10:15,026 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 04:10:15,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:15,026 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 04:10:15,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:10:15,027 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 04:10:15,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:15,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1901074978, now seen corresponding path program 4 times [2024-06-28 04:10:15,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:15,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463996546] [2024-06-28 04:10:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:15,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:17,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:17,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463996546] [2024-06-28 04:10:17,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463996546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:17,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:17,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:10:17,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002482600] [2024-06-28 04:10:17,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:17,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:10:17,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:17,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:10:17,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:10:17,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:17,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 785 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 04:10:17,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:17,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:17,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:18,589 INFO L124 PetriNetUnfolderBase]: 1514/2431 cut-off events. [2024-06-28 04:10:18,589 INFO L125 PetriNetUnfolderBase]: For 27592/27592 co-relation queries the response was YES. [2024-06-28 04:10:18,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12212 conditions, 2431 events. 1514/2431 cut-off events. For 27592/27592 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12722 event pairs, 619 based on Foata normal form. 4/2426 useless extension candidates. Maximal degree in co-relation 12175. Up to 2233 conditions per place. [2024-06-28 04:10:18,600 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 20 changer transitions 0/122 dead transitions. [2024-06-28 04:10:18,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 122 transitions, 1099 flow [2024-06-28 04:10:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:10:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:10:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:10:18,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:10:18,604 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 785 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:10:18,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 122 transitions, 1099 flow [2024-06-28 04:10:18,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 122 transitions, 1049 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 04:10:18,627 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 768 flow [2024-06-28 04:10:18,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=768, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2024-06-28 04:10:18,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-28 04:10:18,628 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 768 flow [2024-06-28 04:10:18,628 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 04:10:18,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:18,628 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 04:10:18,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:10:18,628 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:18,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:18,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1118024616, now seen corresponding path program 2 times [2024-06-28 04:10:18,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:18,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270910141] [2024-06-28 04:10:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:18,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:20,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:20,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270910141] [2024-06-28 04:10:20,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270910141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:20,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:20,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:10:20,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515491882] [2024-06-28 04:10:20,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:20,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:10:20,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:10:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:10:20,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:20,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 768 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 04:10:20,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:20,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:20,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:21,579 INFO L124 PetriNetUnfolderBase]: 1488/2387 cut-off events. [2024-06-28 04:10:21,579 INFO L125 PetriNetUnfolderBase]: For 30533/30533 co-relation queries the response was YES. [2024-06-28 04:10:21,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12100 conditions, 2387 events. 1488/2387 cut-off events. For 30533/30533 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12460 event pairs, 621 based on Foata normal form. 6/2376 useless extension candidates. Maximal degree in co-relation 12061. Up to 2174 conditions per place. [2024-06-28 04:10:21,593 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 71 selfloop transitions, 29 changer transitions 0/105 dead transitions. [2024-06-28 04:10:21,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 105 transitions, 1022 flow [2024-06-28 04:10:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:10:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:10:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 04:10:21,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-28 04:10:21,594 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 768 flow. Second operand 6 states and 105 transitions. [2024-06-28 04:10:21,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 105 transitions, 1022 flow [2024-06-28 04:10:21,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 948 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 04:10:21,610 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 760 flow [2024-06-28 04:10:21,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=760, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2024-06-28 04:10:21,611 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-28 04:10:21,611 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 760 flow [2024-06-28 04:10:21,611 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 04:10:21,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:21,611 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 04:10:21,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:10:21,611 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:21,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash 156516318, now seen corresponding path program 1 times [2024-06-28 04:10:21,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:21,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105708316] [2024-06-28 04:10:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:21,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:23,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:23,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105708316] [2024-06-28 04:10:23,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105708316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:23,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:23,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:10:23,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361332868] [2024-06-28 04:10:23,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:10:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:10:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:10:23,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:23,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 760 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 04:10:23,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:23,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:23,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:24,472 INFO L124 PetriNetUnfolderBase]: 1485/2389 cut-off events. [2024-06-28 04:10:24,472 INFO L125 PetriNetUnfolderBase]: For 32352/32354 co-relation queries the response was YES. [2024-06-28 04:10:24,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12262 conditions, 2389 events. 1485/2389 cut-off events. For 32352/32354 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12433 event pairs, 601 based on Foata normal form. 1/2387 useless extension candidates. Maximal degree in co-relation 12222. Up to 2288 conditions per place. [2024-06-28 04:10:24,485 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 93 selfloop transitions, 10 changer transitions 0/108 dead transitions. [2024-06-28 04:10:24,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 108 transitions, 1037 flow [2024-06-28 04:10:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:10:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:10:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-28 04:10:24,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-28 04:10:24,487 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 760 flow. Second operand 6 states and 99 transitions. [2024-06-28 04:10:24,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 108 transitions, 1037 flow [2024-06-28 04:10:24,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 108 transitions, 949 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 04:10:24,506 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 733 flow [2024-06-28 04:10:24,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=733, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2024-06-28 04:10:24,507 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-28 04:10:24,507 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 733 flow [2024-06-28 04:10:24,507 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 04:10:24,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:24,507 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 04:10:24,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:10:24,508 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:24,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:24,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1118017672, now seen corresponding path program 2 times [2024-06-28 04:10:24,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:24,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486482020] [2024-06-28 04:10:24,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:24,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:26,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:26,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486482020] [2024-06-28 04:10:26,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486482020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:26,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:26,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:10:26,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555101236] [2024-06-28 04:10:26,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:26,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:10:26,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:26,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:10:26,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:10:26,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:26,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 733 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 04:10:26,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:26,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:26,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:27,032 INFO L124 PetriNetUnfolderBase]: 1483/2380 cut-off events. [2024-06-28 04:10:27,033 INFO L125 PetriNetUnfolderBase]: For 34999/35001 co-relation queries the response was YES. [2024-06-28 04:10:27,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12598 conditions, 2380 events. 1483/2380 cut-off events. For 34999/35001 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12478 event pairs, 600 based on Foata normal form. 1/2378 useless extension candidates. Maximal degree in co-relation 12557. Up to 2293 conditions per place. [2024-06-28 04:10:27,045 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 91 selfloop transitions, 10 changer transitions 0/106 dead transitions. [2024-06-28 04:10:27,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 106 transitions, 985 flow [2024-06-28 04:10:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:10:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:10:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-28 04:10:27,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682170542635659 [2024-06-28 04:10:27,047 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 733 flow. Second operand 6 states and 95 transitions. [2024-06-28 04:10:27,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 106 transitions, 985 flow [2024-06-28 04:10:27,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 106 transitions, 951 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 04:10:27,071 INFO L231 Difference]: Finished difference. Result has 97 places, 95 transitions, 748 flow [2024-06-28 04:10:27,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=748, PETRI_PLACES=97, PETRI_TRANSITIONS=95} [2024-06-28 04:10:27,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-28 04:10:27,072 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 95 transitions, 748 flow [2024-06-28 04:10:27,072 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 04:10:27,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:27,072 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 04:10:27,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:10:27,072 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:27,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:27,073 INFO L85 PathProgramCache]: Analyzing trace with hash -475938868, now seen corresponding path program 1 times [2024-06-28 04:10:27,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:27,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470242265] [2024-06-28 04:10:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:27,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:29,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:29,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470242265] [2024-06-28 04:10:29,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470242265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:29,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:29,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:10:29,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385166500] [2024-06-28 04:10:29,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:29,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:10:29,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:29,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:10:29,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:10:29,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:29,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 748 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 04:10:29,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:29,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:29,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:30,604 INFO L124 PetriNetUnfolderBase]: 1528/2459 cut-off events. [2024-06-28 04:10:30,604 INFO L125 PetriNetUnfolderBase]: For 40184/40184 co-relation queries the response was YES. [2024-06-28 04:10:30,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13377 conditions, 2459 events. 1528/2459 cut-off events. For 40184/40184 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13049 event pairs, 564 based on Foata normal form. 15/2457 useless extension candidates. Maximal degree in co-relation 13335. Up to 2031 conditions per place. [2024-06-28 04:10:30,615 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 91 selfloop transitions, 44 changer transitions 0/140 dead transitions. [2024-06-28 04:10:30,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 140 transitions, 1363 flow [2024-06-28 04:10:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:10:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:10:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:10:30,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-28 04:10:30,617 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 748 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:10:30,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 140 transitions, 1363 flow [2024-06-28 04:10:30,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 140 transitions, 1330 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 04:10:30,634 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 1021 flow [2024-06-28 04:10:30,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1021, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-06-28 04:10:30,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-28 04:10:30,635 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 1021 flow [2024-06-28 04:10:30,635 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 04:10:30,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:30,635 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 04:10:30,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:10:30,635 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:30,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:30,636 INFO L85 PathProgramCache]: Analyzing trace with hash 557040492, now seen corresponding path program 1 times [2024-06-28 04:10:30,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:30,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458002964] [2024-06-28 04:10:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:30,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:33,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:33,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458002964] [2024-06-28 04:10:33,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458002964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:33,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:33,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:10:33,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754962779] [2024-06-28 04:10:33,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:33,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:10:33,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:10:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:10:33,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:33,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 112 transitions, 1021 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 04:10:33,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:33,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:33,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:34,251 INFO L124 PetriNetUnfolderBase]: 1525/2447 cut-off events. [2024-06-28 04:10:34,251 INFO L125 PetriNetUnfolderBase]: For 45778/45780 co-relation queries the response was YES. [2024-06-28 04:10:34,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14667 conditions, 2447 events. 1525/2447 cut-off events. For 45778/45780 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12936 event pairs, 546 based on Foata normal form. 1/2445 useless extension candidates. Maximal degree in co-relation 14622. Up to 2345 conditions per place. [2024-06-28 04:10:34,266 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 113 selfloop transitions, 13 changer transitions 0/131 dead transitions. [2024-06-28 04:10:34,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 131 transitions, 1352 flow [2024-06-28 04:10:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:10:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:10:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 04:10:34,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-28 04:10:34,269 INFO L175 Difference]: Start difference. First operand has 102 places, 112 transitions, 1021 flow. Second operand 7 states and 111 transitions. [2024-06-28 04:10:34,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 131 transitions, 1352 flow [2024-06-28 04:10:34,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 131 transitions, 1302 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-28 04:10:34,305 INFO L231 Difference]: Finished difference. Result has 108 places, 115 transitions, 1044 flow [2024-06-28 04:10:34,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1044, PETRI_PLACES=108, PETRI_TRANSITIONS=115} [2024-06-28 04:10:34,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-28 04:10:34,306 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 115 transitions, 1044 flow [2024-06-28 04:10:34,306 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 04:10:34,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:34,306 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 04:10:34,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:10:34,307 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:34,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:34,307 INFO L85 PathProgramCache]: Analyzing trace with hash -298800838, now seen corresponding path program 2 times [2024-06-28 04:10:34,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:34,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725914099] [2024-06-28 04:10:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:34,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:36,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:36,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725914099] [2024-06-28 04:10:36,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725914099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:36,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:36,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:10:36,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423906467] [2024-06-28 04:10:36,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:36,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:10:36,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:36,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:10:36,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:10:36,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:36,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 115 transitions, 1044 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 04:10:36,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:36,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:36,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:37,564 INFO L124 PetriNetUnfolderBase]: 1553/2498 cut-off events. [2024-06-28 04:10:37,564 INFO L125 PetriNetUnfolderBase]: For 51919/51919 co-relation queries the response was YES. [2024-06-28 04:10:37,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15221 conditions, 2498 events. 1553/2498 cut-off events. For 51919/51919 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13353 event pairs, 540 based on Foata normal form. 11/2492 useless extension candidates. Maximal degree in co-relation 15173. Up to 2240 conditions per place. [2024-06-28 04:10:37,577 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 95 selfloop transitions, 39 changer transitions 0/139 dead transitions. [2024-06-28 04:10:37,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 139 transitions, 1457 flow [2024-06-28 04:10:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:10:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:10:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:10:37,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:10:37,578 INFO L175 Difference]: Start difference. First operand has 108 places, 115 transitions, 1044 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:10:37,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 139 transitions, 1457 flow [2024-06-28 04:10:37,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 1411 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 04:10:37,599 INFO L231 Difference]: Finished difference. Result has 110 places, 120 transitions, 1149 flow [2024-06-28 04:10:37,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1149, PETRI_PLACES=110, PETRI_TRANSITIONS=120} [2024-06-28 04:10:37,600 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-28 04:10:37,600 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 120 transitions, 1149 flow [2024-06-28 04:10:37,600 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 04:10:37,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:37,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:10:37,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:10:37,600 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:37,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:37,601 INFO L85 PathProgramCache]: Analyzing trace with hash -298807348, now seen corresponding path program 3 times [2024-06-28 04:10:37,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:37,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789208205] [2024-06-28 04:10:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:37,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:39,674 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 04:10:39,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789208205] [2024-06-28 04:10:39,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789208205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:39,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:39,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:10:39,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026597094] [2024-06-28 04:10:39,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:39,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:10:39,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:10:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:10:39,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:39,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 120 transitions, 1149 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 04:10:39,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:39,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:39,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:40,534 INFO L124 PetriNetUnfolderBase]: 1569/2540 cut-off events. [2024-06-28 04:10:40,534 INFO L125 PetriNetUnfolderBase]: For 55973/55973 co-relation queries the response was YES. [2024-06-28 04:10:40,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16050 conditions, 2540 events. 1569/2540 cut-off events. For 55973/55973 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13697 event pairs, 551 based on Foata normal form. 7/2530 useless extension candidates. Maximal degree in co-relation 16001. Up to 2160 conditions per place. [2024-06-28 04:10:40,550 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 100 selfloop transitions, 43 changer transitions 0/148 dead transitions. [2024-06-28 04:10:40,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 148 transitions, 1661 flow [2024-06-28 04:10:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:10:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:10:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:10:40,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-28 04:10:40,551 INFO L175 Difference]: Start difference. First operand has 110 places, 120 transitions, 1149 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:10:40,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 148 transitions, 1661 flow [2024-06-28 04:10:40,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 148 transitions, 1556 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 04:10:40,581 INFO L231 Difference]: Finished difference. Result has 113 places, 126 transitions, 1240 flow [2024-06-28 04:10:40,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1240, PETRI_PLACES=113, PETRI_TRANSITIONS=126} [2024-06-28 04:10:40,581 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-28 04:10:40,582 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 126 transitions, 1240 flow [2024-06-28 04:10:40,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:40,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:40,582 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 04:10:40,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:10:40,582 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:40,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash -298561270, now seen corresponding path program 1 times [2024-06-28 04:10:40,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:40,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959281320] [2024-06-28 04:10:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:40,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:43,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:43,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959281320] [2024-06-28 04:10:43,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959281320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:43,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:43,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:10:43,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195850326] [2024-06-28 04:10:43,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:43,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:10:43,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:43,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:10:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:10:43,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:43,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 126 transitions, 1240 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 04:10:43,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:43,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:43,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:44,509 INFO L124 PetriNetUnfolderBase]: 1608/2597 cut-off events. [2024-06-28 04:10:44,509 INFO L125 PetriNetUnfolderBase]: For 65056/65056 co-relation queries the response was YES. [2024-06-28 04:10:44,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17008 conditions, 2597 events. 1608/2597 cut-off events. For 65056/65056 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13896 event pairs, 530 based on Foata normal form. 14/2594 useless extension candidates. Maximal degree in co-relation 16957. Up to 2309 conditions per place. [2024-06-28 04:10:44,526 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 108 selfloop transitions, 36 changer transitions 0/149 dead transitions. [2024-06-28 04:10:44,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 149 transitions, 1676 flow [2024-06-28 04:10:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:10:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:10:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 04:10:44,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-28 04:10:44,527 INFO L175 Difference]: Start difference. First operand has 113 places, 126 transitions, 1240 flow. Second operand 7 states and 122 transitions. [2024-06-28 04:10:44,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 149 transitions, 1676 flow [2024-06-28 04:10:44,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 149 transitions, 1578 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 04:10:44,558 INFO L231 Difference]: Finished difference. Result has 116 places, 128 transitions, 1264 flow [2024-06-28 04:10:44,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1264, PETRI_PLACES=116, PETRI_TRANSITIONS=128} [2024-06-28 04:10:44,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-28 04:10:44,558 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 128 transitions, 1264 flow [2024-06-28 04:10:44,559 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 04:10:44,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:44,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:10:44,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:10:44,559 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:44,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:44,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1877567805, now seen corresponding path program 1 times [2024-06-28 04:10:44,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:44,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581025242] [2024-06-28 04:10:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:44,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:47,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:47,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581025242] [2024-06-28 04:10:47,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581025242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:47,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:47,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:10:47,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108435459] [2024-06-28 04:10:47,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:47,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:10:47,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:47,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:10:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:10:47,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:47,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 128 transitions, 1264 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 04:10:47,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:47,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:47,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:48,039 INFO L124 PetriNetUnfolderBase]: 1648/2682 cut-off events. [2024-06-28 04:10:48,039 INFO L125 PetriNetUnfolderBase]: For 69174/69176 co-relation queries the response was YES. [2024-06-28 04:10:48,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17776 conditions, 2682 events. 1648/2682 cut-off events. For 69174/69176 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14685 event pairs, 528 based on Foata normal form. 2/2681 useless extension candidates. Maximal degree in co-relation 17724. Up to 2338 conditions per place. [2024-06-28 04:10:48,059 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 123 selfloop transitions, 39 changer transitions 0/167 dead transitions. [2024-06-28 04:10:48,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 167 transitions, 1856 flow [2024-06-28 04:10:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:10:48,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:10:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 04:10:48,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-28 04:10:48,060 INFO L175 Difference]: Start difference. First operand has 116 places, 128 transitions, 1264 flow. Second operand 7 states and 132 transitions. [2024-06-28 04:10:48,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 167 transitions, 1856 flow [2024-06-28 04:10:48,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 167 transitions, 1765 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:10:48,095 INFO L231 Difference]: Finished difference. Result has 120 places, 137 transitions, 1411 flow [2024-06-28 04:10:48,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1411, PETRI_PLACES=120, PETRI_TRANSITIONS=137} [2024-06-28 04:10:48,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-28 04:10:48,096 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 137 transitions, 1411 flow [2024-06-28 04:10:48,096 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 04:10:48,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:48,097 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 04:10:48,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:10:48,097 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 04:10:48,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:48,097 INFO L85 PathProgramCache]: Analyzing trace with hash 307795959, now seen corresponding path program 2 times [2024-06-28 04:10:48,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:48,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726349678] [2024-06-28 04:10:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:48,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:50,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:50,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726349678] [2024-06-28 04:10:50,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726349678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:50,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:50,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:10:50,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127342917] [2024-06-28 04:10:50,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:50,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:10:50,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:50,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:10:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:10:50,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:50,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 137 transitions, 1411 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 04:10:50,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:50,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:50,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:51,400 INFO L124 PetriNetUnfolderBase]: 1657/2702 cut-off events. [2024-06-28 04:10:51,400 INFO L125 PetriNetUnfolderBase]: For 74152/74154 co-relation queries the response was YES. [2024-06-28 04:10:51,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18190 conditions, 2702 events. 1657/2702 cut-off events. For 74152/74154 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14780 event pairs, 537 based on Foata normal form. 3/2702 useless extension candidates. Maximal degree in co-relation 18135. Up to 2435 conditions per place. [2024-06-28 04:10:51,418 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 120 selfloop transitions, 37 changer transitions 0/162 dead transitions. [2024-06-28 04:10:51,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 162 transitions, 1853 flow [2024-06-28 04:10:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:10:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:10:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 04:10:51,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:10:51,420 INFO L175 Difference]: Start difference. First operand has 120 places, 137 transitions, 1411 flow. Second operand 7 states and 126 transitions. [2024-06-28 04:10:51,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 162 transitions, 1853 flow [2024-06-28 04:10:51,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 162 transitions, 1784 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 04:10:51,458 INFO L231 Difference]: Finished difference. Result has 124 places, 139 transitions, 1463 flow [2024-06-28 04:10:51,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1463, PETRI_PLACES=124, PETRI_TRANSITIONS=139} [2024-06-28 04:10:51,459 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-28 04:10:51,459 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 139 transitions, 1463 flow [2024-06-28 04:10:51,459 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 04:10:51,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:51,459 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 04:10:51,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:10:51,459 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:51,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:51,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1881595913, now seen corresponding path program 3 times [2024-06-28 04:10:51,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:51,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132893845] [2024-06-28 04:10:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:51,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:54,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:54,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132893845] [2024-06-28 04:10:54,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132893845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:54,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:54,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:10:54,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911895328] [2024-06-28 04:10:54,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:54,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:10:54,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:54,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:10:54,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:10:54,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:54,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 1463 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 04:10:54,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:54,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:54,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:54,982 INFO L124 PetriNetUnfolderBase]: 1655/2679 cut-off events. [2024-06-28 04:10:54,982 INFO L125 PetriNetUnfolderBase]: For 79284/79284 co-relation queries the response was YES. [2024-06-28 04:10:54,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18377 conditions, 2679 events. 1655/2679 cut-off events. For 79284/79284 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14606 event pairs, 533 based on Foata normal form. 2/2672 useless extension candidates. Maximal degree in co-relation 18321. Up to 2480 conditions per place. [2024-06-28 04:10:54,999 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 137 selfloop transitions, 22 changer transitions 0/164 dead transitions. [2024-06-28 04:10:54,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 164 transitions, 1892 flow [2024-06-28 04:10:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:10:55,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:10:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:10:55,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:10:55,000 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 1463 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:10:55,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 164 transitions, 1892 flow [2024-06-28 04:10:55,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 164 transitions, 1801 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 04:10:55,047 INFO L231 Difference]: Finished difference. Result has 126 places, 142 transitions, 1473 flow [2024-06-28 04:10:55,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1473, PETRI_PLACES=126, PETRI_TRANSITIONS=142} [2024-06-28 04:10:55,048 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-28 04:10:55,048 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 142 transitions, 1473 flow [2024-06-28 04:10:55,048 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 04:10:55,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:55,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:10:55,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:10:55,049 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 04:10:55,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash 88379101, now seen corresponding path program 4 times [2024-06-28 04:10:55,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:55,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81668446] [2024-06-28 04:10:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:55,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:57,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:57,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81668446] [2024-06-28 04:10:57,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81668446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:57,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:57,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:10:57,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102330742] [2024-06-28 04:10:57,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:57,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:10:57,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:57,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:10:57,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:10:57,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:10:57,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 142 transitions, 1473 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 04:10:57,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:57,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:10:57,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:58,590 INFO L124 PetriNetUnfolderBase]: 1657/2700 cut-off events. [2024-06-28 04:10:58,590 INFO L125 PetriNetUnfolderBase]: For 83185/83185 co-relation queries the response was YES. [2024-06-28 04:10:58,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18428 conditions, 2700 events. 1657/2700 cut-off events. For 83185/83185 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14800 event pairs, 505 based on Foata normal form. 3/2694 useless extension candidates. Maximal degree in co-relation 18371. Up to 2439 conditions per place. [2024-06-28 04:10:58,606 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 34 changer transitions 0/168 dead transitions. [2024-06-28 04:10:58,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 168 transitions, 1918 flow [2024-06-28 04:10:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:10:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:10:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:10:58,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-28 04:10:58,607 INFO L175 Difference]: Start difference. First operand has 126 places, 142 transitions, 1473 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:10:58,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 168 transitions, 1918 flow [2024-06-28 04:10:58,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 168 transitions, 1838 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 04:10:58,647 INFO L231 Difference]: Finished difference. Result has 129 places, 147 transitions, 1537 flow [2024-06-28 04:10:58,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1537, PETRI_PLACES=129, PETRI_TRANSITIONS=147} [2024-06-28 04:10:58,648 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-28 04:10:58,648 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 147 transitions, 1537 flow [2024-06-28 04:10:58,648 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 04:10:58,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:58,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:10:58,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:10:58,649 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 04:10:58,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash -673105929, now seen corresponding path program 5 times [2024-06-28 04:10:58,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:58,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940314986] [2024-06-28 04:10:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:58,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:00,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:00,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940314986] [2024-06-28 04:11:00,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940314986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:00,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:00,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:11:00,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832123975] [2024-06-28 04:11:00,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:00,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:11:00,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:00,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:11:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:11:00,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:00,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 147 transitions, 1537 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 04:11:00,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:00,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:00,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:01,752 INFO L124 PetriNetUnfolderBase]: 1651/2679 cut-off events. [2024-06-28 04:11:01,752 INFO L125 PetriNetUnfolderBase]: For 87977/87977 co-relation queries the response was YES. [2024-06-28 04:11:01,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18480 conditions, 2679 events. 1651/2679 cut-off events. For 87977/87977 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14593 event pairs, 534 based on Foata normal form. 8/2670 useless extension candidates. Maximal degree in co-relation 18421. Up to 2255 conditions per place. [2024-06-28 04:11:01,771 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 117 selfloop transitions, 49 changer transitions 0/171 dead transitions. [2024-06-28 04:11:01,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 171 transitions, 2053 flow [2024-06-28 04:11:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:11:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:11:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:11:01,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-28 04:11:01,773 INFO L175 Difference]: Start difference. First operand has 129 places, 147 transitions, 1537 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:11:01,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 171 transitions, 2053 flow [2024-06-28 04:11:01,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 171 transitions, 1970 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:11:01,818 INFO L231 Difference]: Finished difference. Result has 131 places, 149 transitions, 1586 flow [2024-06-28 04:11:01,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1586, PETRI_PLACES=131, PETRI_TRANSITIONS=149} [2024-06-28 04:11:01,818 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-28 04:11:01,818 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 149 transitions, 1586 flow [2024-06-28 04:11:01,819 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 04:11:01,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:01,819 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 04:11:01,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:11:01,819 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 04:11:01,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:01,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1757109611, now seen corresponding path program 6 times [2024-06-28 04:11:01,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:01,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435484072] [2024-06-28 04:11:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:01,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:03,862 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 04:11:03,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:03,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435484072] [2024-06-28 04:11:03,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435484072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:03,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:03,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:11:03,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060872987] [2024-06-28 04:11:03,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:03,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:11:03,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:11:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:11:03,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:03,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 1586 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 04:11:03,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:03,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:03,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:04,865 INFO L124 PetriNetUnfolderBase]: 1630/2651 cut-off events. [2024-06-28 04:11:04,865 INFO L125 PetriNetUnfolderBase]: For 91060/91060 co-relation queries the response was YES. [2024-06-28 04:11:04,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18360 conditions, 2651 events. 1630/2651 cut-off events. For 91060/91060 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14415 event pairs, 536 based on Foata normal form. 8/2642 useless extension candidates. Maximal degree in co-relation 18300. Up to 2395 conditions per place. [2024-06-28 04:11:04,885 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 130 selfloop transitions, 32 changer transitions 0/167 dead transitions. [2024-06-28 04:11:04,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 167 transitions, 1994 flow [2024-06-28 04:11:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:11:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:11:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 04:11:04,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-28 04:11:04,886 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 1586 flow. Second operand 7 states and 117 transitions. [2024-06-28 04:11:04,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 167 transitions, 1994 flow [2024-06-28 04:11:04,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 167 transitions, 1852 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 04:11:04,957 INFO L231 Difference]: Finished difference. Result has 133 places, 149 transitions, 1514 flow [2024-06-28 04:11:04,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1514, PETRI_PLACES=133, PETRI_TRANSITIONS=149} [2024-06-28 04:11:04,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-28 04:11:04,958 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 149 transitions, 1514 flow [2024-06-28 04:11:04,958 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 04:11:04,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:04,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:11:04,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:11:04,958 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:04,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:04,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1869206670, now seen corresponding path program 1 times [2024-06-28 04:11:04,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:04,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427185526] [2024-06-28 04:11:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:04,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:08,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:08,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427185526] [2024-06-28 04:11:08,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427185526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:08,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:08,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:11:08,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471307872] [2024-06-28 04:11:08,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:08,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:11:08,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:11:08,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:11:08,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:08,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 149 transitions, 1514 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 04:11:08,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:08,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:08,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:08,899 INFO L124 PetriNetUnfolderBase]: 1692/2738 cut-off events. [2024-06-28 04:11:08,899 INFO L125 PetriNetUnfolderBase]: For 96096/96096 co-relation queries the response was YES. [2024-06-28 04:11:08,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18959 conditions, 2738 events. 1692/2738 cut-off events. For 96096/96096 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14836 event pairs, 484 based on Foata normal form. 6/2727 useless extension candidates. Maximal degree in co-relation 18899. Up to 2165 conditions per place. [2024-06-28 04:11:08,918 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 121 selfloop transitions, 73 changer transitions 0/199 dead transitions. [2024-06-28 04:11:08,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 199 transitions, 2340 flow [2024-06-28 04:11:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:11:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:11:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:11:08,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-28 04:11:08,920 INFO L175 Difference]: Start difference. First operand has 133 places, 149 transitions, 1514 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:11:08,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 199 transitions, 2340 flow [2024-06-28 04:11:08,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 199 transitions, 2256 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 04:11:08,986 INFO L231 Difference]: Finished difference. Result has 138 places, 171 transitions, 1900 flow [2024-06-28 04:11:08,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1900, PETRI_PLACES=138, PETRI_TRANSITIONS=171} [2024-06-28 04:11:08,987 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-28 04:11:08,987 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 171 transitions, 1900 flow [2024-06-28 04:11:08,987 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 04:11:08,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:08,988 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 04:11:08,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:11:08,988 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:08,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1869206825, now seen corresponding path program 1 times [2024-06-28 04:11:08,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:08,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078786154] [2024-06-28 04:11:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:08,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:11,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:11,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078786154] [2024-06-28 04:11:11,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078786154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:11,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:11,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:11:11,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527943231] [2024-06-28 04:11:11,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:11,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:11:11,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:11,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:11:11,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:11:11,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:11,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 171 transitions, 1900 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 04:11:11,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:11,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:11,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:12,877 INFO L124 PetriNetUnfolderBase]: 1697/2762 cut-off events. [2024-06-28 04:11:12,877 INFO L125 PetriNetUnfolderBase]: For 104206/104208 co-relation queries the response was YES. [2024-06-28 04:11:12,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20353 conditions, 2762 events. 1697/2762 cut-off events. For 104206/104208 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14952 event pairs, 491 based on Foata normal form. 1/2760 useless extension candidates. Maximal degree in co-relation 20290. Up to 2590 conditions per place. [2024-06-28 04:11:12,899 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 173 selfloop transitions, 24 changer transitions 0/202 dead transitions. [2024-06-28 04:11:12,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 202 transitions, 2548 flow [2024-06-28 04:11:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:11:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:11:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:11:12,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-28 04:11:12,900 INFO L175 Difference]: Start difference. First operand has 138 places, 171 transitions, 1900 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:11:12,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 202 transitions, 2548 flow [2024-06-28 04:11:12,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 202 transitions, 2369 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-28 04:11:12,970 INFO L231 Difference]: Finished difference. Result has 144 places, 180 transitions, 1944 flow [2024-06-28 04:11:12,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1944, PETRI_PLACES=144, PETRI_TRANSITIONS=180} [2024-06-28 04:11:12,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-28 04:11:12,971 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 180 transitions, 1944 flow [2024-06-28 04:11:12,971 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 04:11:12,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:12,971 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 04:11:12,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:11:12,971 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:12,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:12,971 INFO L85 PathProgramCache]: Analyzing trace with hash 88393764, now seen corresponding path program 2 times [2024-06-28 04:11:12,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:12,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214365936] [2024-06-28 04:11:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:12,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:15,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:15,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214365936] [2024-06-28 04:11:15,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214365936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:15,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:15,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:11:15,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756346909] [2024-06-28 04:11:15,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:15,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:11:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:15,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:11:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:11:15,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:15,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 180 transitions, 1944 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 04:11:15,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:15,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:15,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:16,837 INFO L124 PetriNetUnfolderBase]: 1984/3227 cut-off events. [2024-06-28 04:11:16,837 INFO L125 PetriNetUnfolderBase]: For 132389/132389 co-relation queries the response was YES. [2024-06-28 04:11:16,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24493 conditions, 3227 events. 1984/3227 cut-off events. For 132389/132389 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18347 event pairs, 286 based on Foata normal form. 6/3224 useless extension candidates. Maximal degree in co-relation 24427. Up to 2329 conditions per place. [2024-06-28 04:11:16,862 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 137 selfloop transitions, 116 changer transitions 0/258 dead transitions. [2024-06-28 04:11:16,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 258 transitions, 3197 flow [2024-06-28 04:11:16,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:11:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:11:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:11:16,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-28 04:11:16,864 INFO L175 Difference]: Start difference. First operand has 144 places, 180 transitions, 1944 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:11:16,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 258 transitions, 3197 flow [2024-06-28 04:11:16,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 258 transitions, 3124 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 04:11:16,963 INFO L231 Difference]: Finished difference. Result has 149 places, 226 transitions, 2796 flow [2024-06-28 04:11:16,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2796, PETRI_PLACES=149, PETRI_TRANSITIONS=226} [2024-06-28 04:11:16,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-28 04:11:16,963 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 226 transitions, 2796 flow [2024-06-28 04:11:16,963 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 04:11:16,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:16,964 INFO 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 04:11:16,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:11:16,964 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:16,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash 793580433, now seen corresponding path program 1 times [2024-06-28 04:11:16,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:16,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412889262] [2024-06-28 04:11:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:16,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:19,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:19,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412889262] [2024-06-28 04:11:19,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412889262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:19,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:19,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:11:19,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899048160] [2024-06-28 04:11:19,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:19,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:11:19,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:11:19,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:11:19,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:19,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 226 transitions, 2796 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 04:11:19,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:19,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:19,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:20,652 INFO L124 PetriNetUnfolderBase]: 2043/3313 cut-off events. [2024-06-28 04:11:20,652 INFO L125 PetriNetUnfolderBase]: For 145895/145895 co-relation queries the response was YES. [2024-06-28 04:11:20,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27367 conditions, 3313 events. 2043/3313 cut-off events. For 145895/145895 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18634 event pairs, 508 based on Foata normal form. 3/3312 useless extension candidates. Maximal degree in co-relation 27298. Up to 3017 conditions per place. [2024-06-28 04:11:20,677 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 234 selfloop transitions, 38 changer transitions 0/277 dead transitions. [2024-06-28 04:11:20,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 277 transitions, 3803 flow [2024-06-28 04:11:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:11:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:11:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 04:11:20,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-28 04:11:20,678 INFO L175 Difference]: Start difference. First operand has 149 places, 226 transitions, 2796 flow. Second operand 8 states and 148 transitions. [2024-06-28 04:11:20,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 277 transitions, 3803 flow [2024-06-28 04:11:20,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 277 transitions, 3702 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 04:11:20,799 INFO L231 Difference]: Finished difference. Result has 153 places, 242 transitions, 3057 flow [2024-06-28 04:11:20,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2695, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3057, PETRI_PLACES=153, PETRI_TRANSITIONS=242} [2024-06-28 04:11:20,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-28 04:11:20,800 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 242 transitions, 3057 flow [2024-06-28 04:11:20,800 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 04:11:20,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:20,800 INFO 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 04:11:20,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:11:20,800 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:20,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:20,801 INFO L85 PathProgramCache]: Analyzing trace with hash 187316925, now seen corresponding path program 2 times [2024-06-28 04:11:20,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:20,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213018707] [2024-06-28 04:11:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:20,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:23,212 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 04:11:23,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213018707] [2024-06-28 04:11:23,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213018707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:23,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:23,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:11:23,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281499726] [2024-06-28 04:11:23,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:23,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:11:23,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:23,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:11:23,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:11:23,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:23,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 242 transitions, 3057 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 04:11:23,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:23,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:23,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:24,775 INFO L124 PetriNetUnfolderBase]: 2133/3450 cut-off events. [2024-06-28 04:11:24,775 INFO L125 PetriNetUnfolderBase]: For 161917/161917 co-relation queries the response was YES. [2024-06-28 04:11:24,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29112 conditions, 3450 events. 2133/3450 cut-off events. For 161917/161917 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19617 event pairs, 316 based on Foata normal form. 3/3444 useless extension candidates. Maximal degree in co-relation 29041. Up to 2662 conditions per place. [2024-06-28 04:11:24,802 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 195 selfloop transitions, 104 changer transitions 0/304 dead transitions. [2024-06-28 04:11:24,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 304 transitions, 4322 flow [2024-06-28 04:11:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:11:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:11:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 04:11:24,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-28 04:11:24,804 INFO L175 Difference]: Start difference. First operand has 153 places, 242 transitions, 3057 flow. Second operand 9 states and 158 transitions. [2024-06-28 04:11:24,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 304 transitions, 4322 flow [2024-06-28 04:11:24,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 304 transitions, 4238 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 04:11:24,932 INFO L231 Difference]: Finished difference. Result has 161 places, 270 transitions, 3727 flow [2024-06-28 04:11:24,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2973, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3727, PETRI_PLACES=161, PETRI_TRANSITIONS=270} [2024-06-28 04:11:24,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-28 04:11:24,933 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 270 transitions, 3727 flow [2024-06-28 04:11:24,933 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 04:11:24,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:24,933 INFO 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 04:11:24,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:11:24,934 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:24,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:24,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1254057565, now seen corresponding path program 3 times [2024-06-28 04:11:24,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:24,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510961729] [2024-06-28 04:11:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:24,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:27,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:27,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510961729] [2024-06-28 04:11:27,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510961729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:27,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:27,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:11:27,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949152031] [2024-06-28 04:11:27,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:27,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:11:27,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:27,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:11:27,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:11:27,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:27,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 270 transitions, 3727 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 04:11:27,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:27,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:27,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:28,685 INFO L124 PetriNetUnfolderBase]: 2140/3447 cut-off events. [2024-06-28 04:11:28,685 INFO L125 PetriNetUnfolderBase]: For 174956/174956 co-relation queries the response was YES. [2024-06-28 04:11:28,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30820 conditions, 3447 events. 2140/3447 cut-off events. For 174956/174956 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19452 event pairs, 515 based on Foata normal form. 3/3441 useless extension candidates. Maximal degree in co-relation 30744. Up to 3168 conditions per place. [2024-06-28 04:11:28,713 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 251 selfloop transitions, 40 changer transitions 0/296 dead transitions. [2024-06-28 04:11:28,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 296 transitions, 4473 flow [2024-06-28 04:11:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:11:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:11:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:11:28,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-28 04:11:28,715 INFO L175 Difference]: Start difference. First operand has 161 places, 270 transitions, 3727 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:11:28,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 296 transitions, 4473 flow [2024-06-28 04:11:28,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 296 transitions, 4356 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-28 04:11:28,887 INFO L231 Difference]: Finished difference. Result has 165 places, 276 transitions, 3802 flow [2024-06-28 04:11:28,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3802, PETRI_PLACES=165, PETRI_TRANSITIONS=276} [2024-06-28 04:11:28,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-28 04:11:28,887 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 276 transitions, 3802 flow [2024-06-28 04:11:28,887 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 04:11:28,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:28,888 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 04:11:28,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:11:28,888 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 04:11:28,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:28,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1554946325, now seen corresponding path program 4 times [2024-06-28 04:11:28,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:28,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071738787] [2024-06-28 04:11:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:28,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:31,389 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 04:11:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071738787] [2024-06-28 04:11:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071738787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:31,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:31,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:11:31,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871455754] [2024-06-28 04:11:31,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:31,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:11:31,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:11:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:11:31,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:31,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 276 transitions, 3802 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 04:11:31,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:31,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:31,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:32,993 INFO L124 PetriNetUnfolderBase]: 2201/3540 cut-off events. [2024-06-28 04:11:32,993 INFO L125 PetriNetUnfolderBase]: For 190232/190232 co-relation queries the response was YES. [2024-06-28 04:11:33,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31803 conditions, 3540 events. 2201/3540 cut-off events. For 190232/190232 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19960 event pairs, 513 based on Foata normal form. 8/3539 useless extension candidates. Maximal degree in co-relation 31725. Up to 2864 conditions per place. [2024-06-28 04:11:33,026 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 230 selfloop transitions, 106 changer transitions 0/341 dead transitions. [2024-06-28 04:11:33,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 341 transitions, 5376 flow [2024-06-28 04:11:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:11:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:11:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:11:33,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-28 04:11:33,028 INFO L175 Difference]: Start difference. First operand has 165 places, 276 transitions, 3802 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:11:33,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 341 transitions, 5376 flow [2024-06-28 04:11:33,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 341 transitions, 5302 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 04:11:33,246 INFO L231 Difference]: Finished difference. Result has 171 places, 306 transitions, 4571 flow [2024-06-28 04:11:33,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4571, PETRI_PLACES=171, PETRI_TRANSITIONS=306} [2024-06-28 04:11:33,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-28 04:11:33,247 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 306 transitions, 4571 flow [2024-06-28 04:11:33,247 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 04:11:33,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:33,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:11:33,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:11:33,247 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 04:11:33,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1253733787, now seen corresponding path program 1 times [2024-06-28 04:11:33,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:33,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751482008] [2024-06-28 04:11:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:36,317 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 04:11:36,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:36,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751482008] [2024-06-28 04:11:36,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751482008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:36,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:36,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:11:36,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265695741] [2024-06-28 04:11:36,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:36,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:11:36,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:36,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:11:36,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:11:36,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:36,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 306 transitions, 4571 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 04:11:36,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:36,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:36,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:37,817 INFO L124 PetriNetUnfolderBase]: 2253/3618 cut-off events. [2024-06-28 04:11:37,817 INFO L125 PetriNetUnfolderBase]: For 211154/211154 co-relation queries the response was YES. [2024-06-28 04:11:37,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33925 conditions, 3618 events. 2253/3618 cut-off events. For 211154/211154 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20565 event pairs, 526 based on Foata normal form. 14/3615 useless extension candidates. Maximal degree in co-relation 33844. Up to 3279 conditions per place. [2024-06-28 04:11:37,846 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 287 selfloop transitions, 36 changer transitions 0/328 dead transitions. [2024-06-28 04:11:37,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 328 transitions, 5406 flow [2024-06-28 04:11:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:11:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:11:37,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 04:11:37,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-28 04:11:37,848 INFO L175 Difference]: Start difference. First operand has 171 places, 306 transitions, 4571 flow. Second operand 7 states and 122 transitions. [2024-06-28 04:11:37,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 328 transitions, 5406 flow [2024-06-28 04:11:38,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 328 transitions, 5301 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-28 04:11:38,046 INFO L231 Difference]: Finished difference. Result has 175 places, 308 transitions, 4600 flow [2024-06-28 04:11:38,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4600, PETRI_PLACES=175, PETRI_TRANSITIONS=308} [2024-06-28 04:11:38,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-28 04:11:38,047 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 308 transitions, 4600 flow [2024-06-28 04:11:38,047 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 04:11:38,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:38,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:11:38,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:11:38,048 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:38,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:38,048 INFO L85 PathProgramCache]: Analyzing trace with hash 845481225, now seen corresponding path program 2 times [2024-06-28 04:11:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:38,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841503634] [2024-06-28 04:11:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:38,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:41,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:41,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841503634] [2024-06-28 04:11:41,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841503634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:41,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:41,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:11:41,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058977253] [2024-06-28 04:11:41,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:41,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:11:41,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:41,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:11:41,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:11:41,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:41,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 308 transitions, 4600 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 04:11:41,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:41,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:41,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:42,311 INFO L124 PetriNetUnfolderBase]: 2314/3715 cut-off events. [2024-06-28 04:11:42,311 INFO L125 PetriNetUnfolderBase]: For 223600/223600 co-relation queries the response was YES. [2024-06-28 04:11:42,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35219 conditions, 3715 events. 2314/3715 cut-off events. For 223600/223600 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21153 event pairs, 525 based on Foata normal form. 8/3706 useless extension candidates. Maximal degree in co-relation 35136. Up to 3219 conditions per place. [2024-06-28 04:11:42,347 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 295 selfloop transitions, 35 changer transitions 0/335 dead transitions. [2024-06-28 04:11:42,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 335 transitions, 5586 flow [2024-06-28 04:11:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:11:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:11:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 04:11:42,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-28 04:11:42,348 INFO L175 Difference]: Start difference. First operand has 175 places, 308 transitions, 4600 flow. Second operand 7 states and 123 transitions. [2024-06-28 04:11:42,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 335 transitions, 5586 flow [2024-06-28 04:11:42,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 335 transitions, 5497 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:11:42,589 INFO L231 Difference]: Finished difference. Result has 177 places, 310 transitions, 4641 flow [2024-06-28 04:11:42,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4641, PETRI_PLACES=177, PETRI_TRANSITIONS=310} [2024-06-28 04:11:42,590 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-28 04:11:42,590 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 310 transitions, 4641 flow [2024-06-28 04:11:42,590 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 04:11:42,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:42,591 INFO 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 04:11:42,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:11:42,591 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:42,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:42,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1554931631, now seen corresponding path program 1 times [2024-06-28 04:11:42,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:42,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959735765] [2024-06-28 04:11:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:42,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:45,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:45,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959735765] [2024-06-28 04:11:45,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959735765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:45,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:45,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:11:45,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418658259] [2024-06-28 04:11:45,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:45,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:11:45,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:11:45,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:11:45,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:45,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 310 transitions, 4641 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 04:11:45,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:45,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:45,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:47,203 INFO L124 PetriNetUnfolderBase]: 2344/3763 cut-off events. [2024-06-28 04:11:47,203 INFO L125 PetriNetUnfolderBase]: For 232925/232925 co-relation queries the response was YES. [2024-06-28 04:11:47,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35773 conditions, 3763 events. 2344/3763 cut-off events. For 232925/232925 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21461 event pairs, 532 based on Foata normal form. 6/3760 useless extension candidates. Maximal degree in co-relation 35689. Up to 3357 conditions per place. [2024-06-28 04:11:47,239 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 248 selfloop transitions, 86 changer transitions 0/339 dead transitions. [2024-06-28 04:11:47,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 339 transitions, 5520 flow [2024-06-28 04:11:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:11:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:11:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:11:47,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-28 04:11:47,240 INFO L175 Difference]: Start difference. First operand has 177 places, 310 transitions, 4641 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:11:47,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 339 transitions, 5520 flow [2024-06-28 04:11:47,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 339 transitions, 5473 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 04:11:47,485 INFO L231 Difference]: Finished difference. Result has 183 places, 315 transitions, 4882 flow [2024-06-28 04:11:47,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4594, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4882, PETRI_PLACES=183, PETRI_TRANSITIONS=315} [2024-06-28 04:11:47,486 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-28 04:11:47,486 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 315 transitions, 4882 flow [2024-06-28 04:11:47,486 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 04:11:47,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:47,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:11:47,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:11:47,486 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:47,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:47,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1554936405, now seen corresponding path program 1 times [2024-06-28 04:11:47,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:47,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653403929] [2024-06-28 04:11:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:47,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:50,389 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 04:11:50,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:50,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653403929] [2024-06-28 04:11:50,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653403929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:50,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:50,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:11:50,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624135683] [2024-06-28 04:11:50,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:50,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:11:50,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:11:50,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:11:50,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:50,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 315 transitions, 4882 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 04:11:50,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:50,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:50,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:51,596 INFO L124 PetriNetUnfolderBase]: 2339/3760 cut-off events. [2024-06-28 04:11:51,596 INFO L125 PetriNetUnfolderBase]: For 239018/239020 co-relation queries the response was YES. [2024-06-28 04:11:51,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36555 conditions, 3760 events. 2339/3760 cut-off events. For 239018/239020 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21447 event pairs, 550 based on Foata normal form. 2/3759 useless extension candidates. Maximal degree in co-relation 36469. Up to 3573 conditions per place. [2024-06-28 04:11:51,718 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 313 selfloop transitions, 18 changer transitions 0/336 dead transitions. [2024-06-28 04:11:51,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 336 transitions, 5654 flow [2024-06-28 04:11:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:11:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:11:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-28 04:11:51,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-28 04:11:51,719 INFO L175 Difference]: Start difference. First operand has 183 places, 315 transitions, 4882 flow. Second operand 9 states and 135 transitions. [2024-06-28 04:11:51,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 336 transitions, 5654 flow [2024-06-28 04:11:51,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 336 transitions, 5468 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 04:11:51,920 INFO L231 Difference]: Finished difference. Result has 187 places, 317 transitions, 4801 flow [2024-06-28 04:11:51,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4696, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4801, PETRI_PLACES=187, PETRI_TRANSITIONS=317} [2024-06-28 04:11:51,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-28 04:11:51,921 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 317 transitions, 4801 flow [2024-06-28 04:11:51,921 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 04:11:51,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:51,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:11:51,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:11:51,922 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:51,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:51,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1254334519, now seen corresponding path program 2 times [2024-06-28 04:11:51,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:51,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450583410] [2024-06-28 04:11:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:51,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:54,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:54,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450583410] [2024-06-28 04:11:54,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450583410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:54,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:54,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:11:54,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742325468] [2024-06-28 04:11:54,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:54,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:11:54,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:11:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:11:54,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:54,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 317 transitions, 4801 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 04:11:54,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:54,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:54,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:56,250 INFO L124 PetriNetUnfolderBase]: 2409/3854 cut-off events. [2024-06-28 04:11:56,251 INFO L125 PetriNetUnfolderBase]: For 257636/257636 co-relation queries the response was YES. [2024-06-28 04:11:56,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37598 conditions, 3854 events. 2409/3854 cut-off events. For 257636/257636 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21954 event pairs, 515 based on Foata normal form. 6/3851 useless extension candidates. Maximal degree in co-relation 37511. Up to 3301 conditions per place. [2024-06-28 04:11:56,288 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 255 selfloop transitions, 102 changer transitions 0/362 dead transitions. [2024-06-28 04:11:56,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 362 transitions, 6178 flow [2024-06-28 04:11:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:11:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:11:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 04:11:56,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-28 04:11:56,289 INFO L175 Difference]: Start difference. First operand has 187 places, 317 transitions, 4801 flow. Second operand 9 states and 155 transitions. [2024-06-28 04:11:56,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 362 transitions, 6178 flow [2024-06-28 04:11:56,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 362 transitions, 6089 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-28 04:11:56,537 INFO L231 Difference]: Finished difference. Result has 191 places, 333 transitions, 5347 flow [2024-06-28 04:11:56,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5347, PETRI_PLACES=191, PETRI_TRANSITIONS=333} [2024-06-28 04:11:56,537 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-28 04:11:56,538 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 333 transitions, 5347 flow [2024-06-28 04:11:56,538 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 04:11:56,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:56,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:11:56,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:11:56,538 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:56,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:56,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2110656981, now seen corresponding path program 3 times [2024-06-28 04:11:56,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:56,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290209739] [2024-06-28 04:11:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:56,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:59,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:59,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290209739] [2024-06-28 04:11:59,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290209739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:59,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:59,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:11:59,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338906350] [2024-06-28 04:11:59,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:59,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:11:59,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:59,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:11:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:11:59,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:11:59,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 333 transitions, 5347 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 04:11:59,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:59,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:11:59,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:00,996 INFO L124 PetriNetUnfolderBase]: 2423/3879 cut-off events. [2024-06-28 04:12:00,996 INFO L125 PetriNetUnfolderBase]: For 273471/273471 co-relation queries the response was YES. [2024-06-28 04:12:01,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39140 conditions, 3879 events. 2423/3879 cut-off events. For 273471/273471 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22087 event pairs, 536 based on Foata normal form. 6/3876 useless extension candidates. Maximal degree in co-relation 39050. Up to 3552 conditions per place. [2024-06-28 04:12:01,030 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 305 selfloop transitions, 49 changer transitions 0/359 dead transitions. [2024-06-28 04:12:01,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 359 transitions, 6245 flow [2024-06-28 04:12:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:12:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:12:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 04:12:01,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-28 04:12:01,031 INFO L175 Difference]: Start difference. First operand has 191 places, 333 transitions, 5347 flow. Second operand 9 states and 149 transitions. [2024-06-28 04:12:01,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 359 transitions, 6245 flow [2024-06-28 04:12:01,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 359 transitions, 6018 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-28 04:12:01,271 INFO L231 Difference]: Finished difference. Result has 196 places, 338 transitions, 5357 flow [2024-06-28 04:12:01,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5152, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5357, PETRI_PLACES=196, PETRI_TRANSITIONS=338} [2024-06-28 04:12:01,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-28 04:12:01,272 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 338 transitions, 5357 flow [2024-06-28 04:12:01,272 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 04:12:01,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:01,272 INFO 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 04:12:01,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:12:01,273 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 04:12:01,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2110650037, now seen corresponding path program 1 times [2024-06-28 04:12:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:01,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744313087] [2024-06-28 04:12:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:01,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:06,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:06,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744313087] [2024-06-28 04:12:06,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744313087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:06,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:06,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:06,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145156507] [2024-06-28 04:12:06,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:06,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:06,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:06,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:06,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:06,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:12:06,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 338 transitions, 5357 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 04:12:06,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:06,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:12:06,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:07,639 INFO L124 PetriNetUnfolderBase]: 2475/3957 cut-off events. [2024-06-28 04:12:07,639 INFO L125 PetriNetUnfolderBase]: For 293373/293373 co-relation queries the response was YES. [2024-06-28 04:12:07,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39778 conditions, 3957 events. 2475/3957 cut-off events. For 293373/293373 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22686 event pairs, 567 based on Foata normal form. 14/3954 useless extension candidates. Maximal degree in co-relation 39686. Up to 3343 conditions per place. [2024-06-28 04:12:07,679 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 287 selfloop transitions, 80 changer transitions 0/372 dead transitions. [2024-06-28 04:12:07,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 372 transitions, 6431 flow [2024-06-28 04:12:07,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:12:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:12:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:12:07,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:12:07,681 INFO L175 Difference]: Start difference. First operand has 196 places, 338 transitions, 5357 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:12:07,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 372 transitions, 6431 flow [2024-06-28 04:12:07,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 372 transitions, 6305 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 04:12:08,003 INFO L231 Difference]: Finished difference. Result has 199 places, 341 transitions, 5489 flow [2024-06-28 04:12:08,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5231, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5489, PETRI_PLACES=199, PETRI_TRANSITIONS=341} [2024-06-28 04:12:08,004 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-28 04:12:08,004 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 341 transitions, 5489 flow [2024-06-28 04:12:08,004 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 04:12:08,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:08,005 INFO 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 04:12:08,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:12:08,005 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 04:12:08,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:08,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2110650285, now seen corresponding path program 1 times [2024-06-28 04:12:08,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:08,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860461602] [2024-06-28 04:12:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:08,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:11,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:11,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860461602] [2024-06-28 04:12:11,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860461602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:11,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:11,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:11,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977317808] [2024-06-28 04:12:11,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:11,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:11,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:11,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:11,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:11,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:12:11,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 341 transitions, 5489 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 04:12:11,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:11,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:12:11,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:12,542 INFO L124 PetriNetUnfolderBase]: 2473/3960 cut-off events. [2024-06-28 04:12:12,543 INFO L125 PetriNetUnfolderBase]: For 294540/294540 co-relation queries the response was YES. [2024-06-28 04:12:12,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40125 conditions, 3960 events. 2473/3960 cut-off events. For 294540/294540 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22674 event pairs, 575 based on Foata normal form. 6/3949 useless extension candidates. Maximal degree in co-relation 40032. Up to 3365 conditions per place. [2024-06-28 04:12:12,580 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 274 selfloop transitions, 98 changer transitions 0/377 dead transitions. [2024-06-28 04:12:12,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 377 transitions, 6642 flow [2024-06-28 04:12:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:12:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:12:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:12:12,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-28 04:12:12,582 INFO L175 Difference]: Start difference. First operand has 199 places, 341 transitions, 5489 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:12:12,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 377 transitions, 6642 flow [2024-06-28 04:12:12,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 377 transitions, 6466 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 04:12:12,910 INFO L231 Difference]: Finished difference. Result has 202 places, 350 transitions, 5751 flow [2024-06-28 04:12:12,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5751, PETRI_PLACES=202, PETRI_TRANSITIONS=350} [2024-06-28 04:12:12,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-28 04:12:12,911 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 350 transitions, 5751 flow [2024-06-28 04:12:12,911 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 04:12:12,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:12,912 INFO 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 04:12:12,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:12:12,912 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 04:12:12,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2135128425, now seen corresponding path program 2 times [2024-06-28 04:12:12,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:12,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14919662] [2024-06-28 04:12:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:12,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:16,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:16,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14919662] [2024-06-28 04:12:16,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14919662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:16,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:16,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:16,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956182872] [2024-06-28 04:12:16,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:16,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:16,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:16,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:16,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:12:16,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 350 transitions, 5751 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 04:12:16,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:16,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:12:16,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:18,390 INFO L124 PetriNetUnfolderBase]: 2612/4192 cut-off events. [2024-06-28 04:12:18,390 INFO L125 PetriNetUnfolderBase]: For 336145/336145 co-relation queries the response was YES. [2024-06-28 04:12:18,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43140 conditions, 4192 events. 2612/4192 cut-off events. For 336145/336145 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 24373 event pairs, 571 based on Foata normal form. 40/4215 useless extension candidates. Maximal degree in co-relation 43046. Up to 3396 conditions per place. [2024-06-28 04:12:18,428 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 312 selfloop transitions, 72 changer transitions 13/402 dead transitions. [2024-06-28 04:12:18,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 402 transitions, 7453 flow [2024-06-28 04:12:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:12:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:12:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 04:12:18,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-28 04:12:18,429 INFO L175 Difference]: Start difference. First operand has 202 places, 350 transitions, 5751 flow. Second operand 9 states and 157 transitions. [2024-06-28 04:12:18,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 402 transitions, 7453 flow [2024-06-28 04:12:18,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 402 transitions, 7144 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-28 04:12:18,723 INFO L231 Difference]: Finished difference. Result has 204 places, 358 transitions, 5888 flow [2024-06-28 04:12:18,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5446, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5888, PETRI_PLACES=204, PETRI_TRANSITIONS=358} [2024-06-28 04:12:18,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-28 04:12:18,724 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 358 transitions, 5888 flow [2024-06-28 04:12:18,724 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 04:12:18,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:18,724 INFO 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 04:12:18,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:12:18,725 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 04:12:18,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash -929158859, now seen corresponding path program 3 times [2024-06-28 04:12:18,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:18,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134744015] [2024-06-28 04:12:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:18,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:21,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134744015] [2024-06-28 04:12:21,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134744015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:21,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:21,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:21,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659461124] [2024-06-28 04:12:21,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:21,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:21,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:21,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:21,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:21,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:12:21,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 358 transitions, 5888 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 04:12:21,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:21,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:12:21,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:23,279 INFO L124 PetriNetUnfolderBase]: 2640/4237 cut-off events. [2024-06-28 04:12:23,279 INFO L125 PetriNetUnfolderBase]: For 345624/345624 co-relation queries the response was YES. [2024-06-28 04:12:23,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44188 conditions, 4237 events. 2640/4237 cut-off events. For 345624/345624 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24727 event pairs, 571 based on Foata normal form. 20/4240 useless extension candidates. Maximal degree in co-relation 44093. Up to 3848 conditions per place. [2024-06-28 04:12:23,322 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 347 selfloop transitions, 37 changer transitions 0/389 dead transitions. [2024-06-28 04:12:23,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 389 transitions, 7081 flow [2024-06-28 04:12:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:12:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:12:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:12:23,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-28 04:12:23,323 INFO L175 Difference]: Start difference. First operand has 204 places, 358 transitions, 5888 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:12:23,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 389 transitions, 7081 flow [2024-06-28 04:12:23,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 389 transitions, 6839 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-28 04:12:23,644 INFO L231 Difference]: Finished difference. Result has 207 places, 361 transitions, 5856 flow [2024-06-28 04:12:23,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5681, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5856, PETRI_PLACES=207, PETRI_TRANSITIONS=361} [2024-06-28 04:12:23,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-28 04:12:23,644 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 361 transitions, 5856 flow [2024-06-28 04:12:23,644 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 04:12:23,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:23,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:12:23,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:12:23,645 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 04:12:23,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:23,645 INFO L85 PathProgramCache]: Analyzing trace with hash -928919849, now seen corresponding path program 4 times [2024-06-28 04:12:23,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:23,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278185391] [2024-06-28 04:12:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:23,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:26,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:26,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278185391] [2024-06-28 04:12:26,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278185391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:26,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:26,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:26,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104413731] [2024-06-28 04:12:26,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:26,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:26,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:26,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:26,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:12:26,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 361 transitions, 5856 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 04:12:26,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:26,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:12:26,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:28,110 INFO L124 PetriNetUnfolderBase]: 2717/4398 cut-off events. [2024-06-28 04:12:28,110 INFO L125 PetriNetUnfolderBase]: For 364210/364210 co-relation queries the response was YES. [2024-06-28 04:12:28,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44939 conditions, 4398 events. 2717/4398 cut-off events. For 364210/364210 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 26246 event pairs, 561 based on Foata normal form. 30/4411 useless extension candidates. Maximal degree in co-relation 44842. Up to 3905 conditions per place. [2024-06-28 04:12:28,152 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 341 selfloop transitions, 40 changer transitions 7/393 dead transitions. [2024-06-28 04:12:28,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 393 transitions, 7043 flow [2024-06-28 04:12:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:12:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:12:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 04:12:28,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-28 04:12:28,154 INFO L175 Difference]: Start difference. First operand has 207 places, 361 transitions, 5856 flow. Second operand 8 states and 139 transitions. [2024-06-28 04:12:28,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 393 transitions, 7043 flow [2024-06-28 04:12:28,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 393 transitions, 6927 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 04:12:28,535 INFO L231 Difference]: Finished difference. Result has 210 places, 365 transitions, 5951 flow [2024-06-28 04:12:28,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5740, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5951, PETRI_PLACES=210, PETRI_TRANSITIONS=365} [2024-06-28 04:12:28,536 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-28 04:12:28,536 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 365 transitions, 5951 flow [2024-06-28 04:12:28,536 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 04:12:28,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:28,536 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] [2024-06-28 04:12:28,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:12:28,537 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 04:12:28,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash 845191499, now seen corresponding path program 5 times [2024-06-28 04:12:28,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:28,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312693414] [2024-06-28 04:12:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:28,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:31,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:31,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312693414] [2024-06-28 04:12:31,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312693414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:31,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:31,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:31,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742947305] [2024-06-28 04:12:31,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:31,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:31,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:31,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:12:31,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 365 transitions, 5951 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 04:12:31,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:31,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:12:31,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:33,517 INFO L124 PetriNetUnfolderBase]: 2732/4443 cut-off events. [2024-06-28 04:12:33,517 INFO L125 PetriNetUnfolderBase]: For 370366/370366 co-relation queries the response was YES. [2024-06-28 04:12:33,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45461 conditions, 4443 events. 2732/4443 cut-off events. For 370366/370366 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 26809 event pairs, 617 based on Foata normal form. 22/4448 useless extension candidates. Maximal degree in co-relation 45363. Up to 3919 conditions per place. [2024-06-28 04:12:33,561 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 342 selfloop transitions, 44 changer transitions 4/395 dead transitions. [2024-06-28 04:12:33,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 395 transitions, 7101 flow [2024-06-28 04:12:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:12:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:12:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:12:33,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:12:33,562 INFO L175 Difference]: Start difference. First operand has 210 places, 365 transitions, 5951 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:12:33,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 395 transitions, 7101 flow [2024-06-28 04:12:33,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 395 transitions, 6970 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 04:12:33,932 INFO L231 Difference]: Finished difference. Result has 213 places, 363 transitions, 5920 flow [2024-06-28 04:12:33,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5820, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5920, PETRI_PLACES=213, PETRI_TRANSITIONS=363} [2024-06-28 04:12:33,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-28 04:12:33,933 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 363 transitions, 5920 flow [2024-06-28 04:12:33,933 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 04:12:33,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:33,933 INFO 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 04:12:33,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:12:33,933 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 04:12:33,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash 123710732, now seen corresponding path program 1 times [2024-06-28 04:12:33,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:33,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353975648] [2024-06-28 04:12:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:33,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:36,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:36,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353975648] [2024-06-28 04:12:36,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353975648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:36,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:36,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:12:36,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509489219] [2024-06-28 04:12:36,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:36,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:12:36,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:36,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:12:36,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:12:36,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:12:36,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 363 transitions, 5920 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 04:12:36,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:36,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:12:36,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:38,846 INFO L124 PetriNetUnfolderBase]: 2729/4457 cut-off events. [2024-06-28 04:12:38,846 INFO L125 PetriNetUnfolderBase]: For 360632/360632 co-relation queries the response was YES. [2024-06-28 04:12:38,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45599 conditions, 4457 events. 2729/4457 cut-off events. For 360632/360632 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26914 event pairs, 459 based on Foata normal form. 2/4456 useless extension candidates. Maximal degree in co-relation 45500. Up to 4004 conditions per place. [2024-06-28 04:12:38,891 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 366 selfloop transitions, 46 changer transitions 0/417 dead transitions. [2024-06-28 04:12:38,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 417 transitions, 7331 flow [2024-06-28 04:12:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:12:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:12:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 04:12:38,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-28 04:12:38,892 INFO L175 Difference]: Start difference. First operand has 213 places, 363 transitions, 5920 flow. Second operand 8 states and 157 transitions. [2024-06-28 04:12:38,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 417 transitions, 7331 flow [2024-06-28 04:12:39,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 417 transitions, 7210 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:12:39,343 INFO L231 Difference]: Finished difference. Result has 217 places, 375 transitions, 6219 flow [2024-06-28 04:12:39,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5811, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6219, PETRI_PLACES=217, PETRI_TRANSITIONS=375} [2024-06-28 04:12:39,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-28 04:12:39,343 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 375 transitions, 6219 flow [2024-06-28 04:12:39,344 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 04:12:39,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:39,344 INFO 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 04:12:39,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:12:39,344 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 04:12:39,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:39,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2042576682, now seen corresponding path program 2 times [2024-06-28 04:12:39,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:39,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673259515] [2024-06-28 04:12:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:39,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:42,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:42,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673259515] [2024-06-28 04:12:42,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673259515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:42,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:42,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:12:42,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325298689] [2024-06-28 04:12:42,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:42,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:12:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:42,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:12:42,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:12:42,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:12:42,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 375 transitions, 6219 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 04:12:42,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:42,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:12:42,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:43,897 INFO L124 PetriNetUnfolderBase]: 2742/4484 cut-off events. [2024-06-28 04:12:43,897 INFO L125 PetriNetUnfolderBase]: For 375217/375217 co-relation queries the response was YES. [2024-06-28 04:12:43,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46398 conditions, 4484 events. 2742/4484 cut-off events. For 375217/375217 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 27143 event pairs, 612 based on Foata normal form. 2/4483 useless extension candidates. Maximal degree in co-relation 46296. Up to 4133 conditions per place. [2024-06-28 04:12:43,946 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 361 selfloop transitions, 46 changer transitions 0/412 dead transitions. [2024-06-28 04:12:43,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 412 transitions, 7277 flow [2024-06-28 04:12:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:12:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:12:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:12:43,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-28 04:12:43,947 INFO L175 Difference]: Start difference. First operand has 217 places, 375 transitions, 6219 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:12:43,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 412 transitions, 7277 flow [2024-06-28 04:12:44,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 412 transitions, 7143 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-28 04:12:44,508 INFO L231 Difference]: Finished difference. Result has 222 places, 380 transitions, 6304 flow [2024-06-28 04:12:44,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6097, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6304, PETRI_PLACES=222, PETRI_TRANSITIONS=380} [2024-06-28 04:12:44,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-28 04:12:44,509 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 380 transitions, 6304 flow [2024-06-28 04:12:44,509 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 04:12:44,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:44,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:12:44,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:12:44,509 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 04:12:44,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:44,510 INFO L85 PathProgramCache]: Analyzing trace with hash 50920062, now seen corresponding path program 1 times [2024-06-28 04:12:44,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:44,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317934464] [2024-06-28 04:12:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:44,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:47,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317934464] [2024-06-28 04:12:47,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317934464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:47,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:47,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:12:47,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662989751] [2024-06-28 04:12:47,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:47,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:12:47,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:47,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:12:47,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:12:47,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:12:47,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 380 transitions, 6304 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 04:12:47,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:47,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:12:47,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:48,955 INFO L124 PetriNetUnfolderBase]: 2747/4486 cut-off events. [2024-06-28 04:12:48,955 INFO L125 PetriNetUnfolderBase]: For 387307/387309 co-relation queries the response was YES. [2024-06-28 04:12:48,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46628 conditions, 4486 events. 2747/4486 cut-off events. For 387307/387309 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 27147 event pairs, 613 based on Foata normal form. 1/4484 useless extension candidates. Maximal degree in co-relation 46525. Up to 4058 conditions per place. [2024-06-28 04:12:49,008 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 352 selfloop transitions, 56 changer transitions 0/413 dead transitions. [2024-06-28 04:12:49,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 413 transitions, 7406 flow [2024-06-28 04:12:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:12:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:12:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:12:49,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-28 04:12:49,009 INFO L175 Difference]: Start difference. First operand has 222 places, 380 transitions, 6304 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:12:49,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 413 transitions, 7406 flow [2024-06-28 04:12:49,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 413 transitions, 7285 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 04:12:49,735 INFO L231 Difference]: Finished difference. Result has 225 places, 383 transitions, 6406 flow [2024-06-28 04:12:49,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6406, PETRI_PLACES=225, PETRI_TRANSITIONS=383} [2024-06-28 04:12:49,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-28 04:12:49,735 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 383 transitions, 6406 flow [2024-06-28 04:12:49,736 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 04:12:49,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:49,736 INFO 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 04:12:49,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:12:49,736 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 04:12:49,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:49,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1017377872, now seen corresponding path program 3 times [2024-06-28 04:12:49,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:49,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561986945] [2024-06-28 04:12:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:49,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:52,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:52,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561986945] [2024-06-28 04:12:52,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561986945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:52,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:52,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:12:52,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433562244] [2024-06-28 04:12:52,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:52,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:12:52,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:52,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:12:52,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:12:52,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:12:52,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 383 transitions, 6406 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 04:12:52,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:52,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:12:52,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:54,355 INFO L124 PetriNetUnfolderBase]: 2742/4485 cut-off events. [2024-06-28 04:12:54,355 INFO L125 PetriNetUnfolderBase]: For 400839/400841 co-relation queries the response was YES. [2024-06-28 04:12:54,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46972 conditions, 4485 events. 2742/4485 cut-off events. For 400839/400841 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27153 event pairs, 604 based on Foata normal form. 2/4484 useless extension candidates. Maximal degree in co-relation 46868. Up to 4133 conditions per place. [2024-06-28 04:12:54,405 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 355 selfloop transitions, 46 changer transitions 0/406 dead transitions. [2024-06-28 04:12:54,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 406 transitions, 7305 flow [2024-06-28 04:12:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:12:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:12:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:12:54,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-28 04:12:54,406 INFO L175 Difference]: Start difference. First operand has 225 places, 383 transitions, 6406 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:12:54,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 406 transitions, 7305 flow [2024-06-28 04:12:54,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 406 transitions, 7097 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-28 04:12:54,954 INFO L231 Difference]: Finished difference. Result has 228 places, 384 transitions, 6319 flow [2024-06-28 04:12:54,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6198, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6319, PETRI_PLACES=228, PETRI_TRANSITIONS=384} [2024-06-28 04:12:54,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-28 04:12:54,954 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 384 transitions, 6319 flow [2024-06-28 04:12:54,955 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 04:12:54,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:54,955 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 04:12:54,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:12:54,955 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:12:54,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:54,956 INFO L85 PathProgramCache]: Analyzing trace with hash -173960432, now seen corresponding path program 1 times [2024-06-28 04:12:54,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:54,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027391735] [2024-06-28 04:12:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:57,738 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 04:12:57,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:57,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027391735] [2024-06-28 04:12:57,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027391735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:57,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:57,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:57,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540594800] [2024-06-28 04:12:57,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:57,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:57,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:57,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:57,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:57,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:12:57,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 384 transitions, 6319 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 04:12:57,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:57,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:12:57,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:59,479 INFO L124 PetriNetUnfolderBase]: 2752/4501 cut-off events. [2024-06-28 04:12:59,479 INFO L125 PetriNetUnfolderBase]: For 412363/412363 co-relation queries the response was YES. [2024-06-28 04:12:59,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47237 conditions, 4501 events. 2752/4501 cut-off events. For 412363/412363 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27306 event pairs, 606 based on Foata normal form. 2/4499 useless extension candidates. Maximal degree in co-relation 47131. Up to 4182 conditions per place. [2024-06-28 04:12:59,530 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 380 selfloop transitions, 34 changer transitions 0/419 dead transitions. [2024-06-28 04:12:59,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 419 transitions, 7438 flow [2024-06-28 04:12:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:12:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:12:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 04:12:59,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-28 04:12:59,532 INFO L175 Difference]: Start difference. First operand has 228 places, 384 transitions, 6319 flow. Second operand 9 states and 150 transitions. [2024-06-28 04:12:59,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 419 transitions, 7438 flow [2024-06-28 04:13:00,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 419 transitions, 7325 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 04:13:00,067 INFO L231 Difference]: Finished difference. Result has 234 places, 390 transitions, 6418 flow [2024-06-28 04:13:00,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6206, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6418, PETRI_PLACES=234, PETRI_TRANSITIONS=390} [2024-06-28 04:13:00,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-28 04:13:00,068 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 390 transitions, 6418 flow [2024-06-28 04:13:00,068 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 04:13:00,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:00,068 INFO 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 04:13:00,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:13:00,068 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 04:13:00,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1459721896, now seen corresponding path program 2 times [2024-06-28 04:13:00,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:00,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731654310] [2024-06-28 04:13:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:00,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:03,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:03,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731654310] [2024-06-28 04:13:03,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731654310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:03,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:03,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:13:03,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966843027] [2024-06-28 04:13:03,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:03,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:13:03,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:03,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:13:03,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:13:03,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:13:03,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 390 transitions, 6418 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 04:13:03,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:03,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:13:03,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:04,906 INFO L124 PetriNetUnfolderBase]: 2757/4498 cut-off events. [2024-06-28 04:13:04,906 INFO L125 PetriNetUnfolderBase]: For 425624/425624 co-relation queries the response was YES. [2024-06-28 04:13:04,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47634 conditions, 4498 events. 2757/4498 cut-off events. For 425624/425624 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 27211 event pairs, 608 based on Foata normal form. 1/4490 useless extension candidates. Maximal degree in co-relation 47525. Up to 4199 conditions per place. [2024-06-28 04:13:04,959 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 385 selfloop transitions, 28 changer transitions 0/418 dead transitions. [2024-06-28 04:13:04,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 418 transitions, 7446 flow [2024-06-28 04:13:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:13:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:13:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-28 04:13:04,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-28 04:13:04,961 INFO L175 Difference]: Start difference. First operand has 234 places, 390 transitions, 6418 flow. Second operand 9 states and 141 transitions. [2024-06-28 04:13:04,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 418 transitions, 7446 flow [2024-06-28 04:13:05,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 418 transitions, 7335 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 04:13:05,464 INFO L231 Difference]: Finished difference. Result has 239 places, 396 transitions, 6514 flow [2024-06-28 04:13:05,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6311, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6514, PETRI_PLACES=239, PETRI_TRANSITIONS=396} [2024-06-28 04:13:05,465 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-28 04:13:05,465 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 396 transitions, 6514 flow [2024-06-28 04:13:05,465 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 04:13:05,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:05,465 INFO 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 04:13:05,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:13:05,465 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 04:13:05,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash -966975012, now seen corresponding path program 3 times [2024-06-28 04:13:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443324838] [2024-06-28 04:13:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:08,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:08,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443324838] [2024-06-28 04:13:08,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443324838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:08,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:08,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:13:08,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587797316] [2024-06-28 04:13:08,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:08,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:13:08,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:08,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:13:08,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:13:08,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:13:08,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 396 transitions, 6514 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 04:13:08,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:08,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:13:08,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:10,392 INFO L124 PetriNetUnfolderBase]: 2764/4506 cut-off events. [2024-06-28 04:13:10,392 INFO L125 PetriNetUnfolderBase]: For 444710/444710 co-relation queries the response was YES. [2024-06-28 04:13:10,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48160 conditions, 4506 events. 2764/4506 cut-off events. For 444710/444710 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 27308 event pairs, 654 based on Foata normal form. 3/4492 useless extension candidates. Maximal degree in co-relation 48049. Up to 3883 conditions per place. [2024-06-28 04:13:10,441 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 343 selfloop transitions, 83 changer transitions 0/431 dead transitions. [2024-06-28 04:13:10,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 431 transitions, 7937 flow [2024-06-28 04:13:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:13:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:13:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 04:13:10,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-28 04:13:10,442 INFO L175 Difference]: Start difference. First operand has 239 places, 396 transitions, 6514 flow. Second operand 8 states and 141 transitions. [2024-06-28 04:13:10,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 431 transitions, 7937 flow [2024-06-28 04:13:10,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 431 transitions, 7817 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-28 04:13:10,928 INFO L231 Difference]: Finished difference. Result has 243 places, 403 transitions, 6802 flow [2024-06-28 04:13:10,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6394, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6802, PETRI_PLACES=243, PETRI_TRANSITIONS=403} [2024-06-28 04:13:10,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-28 04:13:10,929 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 403 transitions, 6802 flow [2024-06-28 04:13:10,929 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 04:13:10,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:10,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:13:10,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 04:13:10,929 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:13:10,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:10,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1499432160, now seen corresponding path program 2 times [2024-06-28 04:13:10,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:10,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746302252] [2024-06-28 04:13:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:10,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:13,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:13,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746302252] [2024-06-28 04:13:13,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746302252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:13,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:13,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:13:13,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823446634] [2024-06-28 04:13:13,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:13,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:13:13,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:13,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:13:13,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:13:13,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:13:13,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 403 transitions, 6802 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 04:13:13,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:13,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:13:13,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:15,616 INFO L124 PetriNetUnfolderBase]: 2762/4513 cut-off events. [2024-06-28 04:13:15,617 INFO L125 PetriNetUnfolderBase]: For 461185/461185 co-relation queries the response was YES. [2024-06-28 04:13:15,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48888 conditions, 4513 events. 2762/4513 cut-off events. For 461185/461185 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27387 event pairs, 611 based on Foata normal form. 2/4506 useless extension candidates. Maximal degree in co-relation 48775. Up to 4188 conditions per place. [2024-06-28 04:13:15,667 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 394 selfloop transitions, 33 changer transitions 0/432 dead transitions. [2024-06-28 04:13:15,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 432 transitions, 7928 flow [2024-06-28 04:13:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:13:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:13:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 04:13:15,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-28 04:13:15,669 INFO L175 Difference]: Start difference. First operand has 243 places, 403 transitions, 6802 flow. Second operand 9 states and 148 transitions. [2024-06-28 04:13:15,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 432 transitions, 7928 flow [2024-06-28 04:13:16,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 432 transitions, 7735 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-28 04:13:16,375 INFO L231 Difference]: Finished difference. Result has 249 places, 408 transitions, 6801 flow [2024-06-28 04:13:16,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6609, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6801, PETRI_PLACES=249, PETRI_TRANSITIONS=408} [2024-06-28 04:13:16,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-28 04:13:16,375 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 408 transitions, 6801 flow [2024-06-28 04:13:16,376 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 04:13:16,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:16,376 INFO 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 04:13:16,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 04:13:16,376 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 04:13:16,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:16,376 INFO L85 PathProgramCache]: Analyzing trace with hash -958693858, now seen corresponding path program 3 times [2024-06-28 04:13:16,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:16,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580259033] [2024-06-28 04:13:16,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:16,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:19,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:19,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580259033] [2024-06-28 04:13:19,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580259033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:19,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:19,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:13:19,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460566711] [2024-06-28 04:13:19,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:19,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:13:19,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:19,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:13:19,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:13:19,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:13:19,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 408 transitions, 6801 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 04:13:19,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:19,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:13:19,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:21,453 INFO L124 PetriNetUnfolderBase]: 2816/4596 cut-off events. [2024-06-28 04:13:21,453 INFO L125 PetriNetUnfolderBase]: For 481937/481937 co-relation queries the response was YES. [2024-06-28 04:13:21,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49920 conditions, 4596 events. 2816/4596 cut-off events. For 481937/481937 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 27859 event pairs, 473 based on Foata normal form. 3/4590 useless extension candidates. Maximal degree in co-relation 49804. Up to 3180 conditions per place. [2024-06-28 04:13:21,504 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 236 selfloop transitions, 214 changer transitions 0/455 dead transitions. [2024-06-28 04:13:21,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 455 transitions, 8295 flow [2024-06-28 04:13:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:13:21,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:13:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 04:13:21,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-28 04:13:21,505 INFO L175 Difference]: Start difference. First operand has 249 places, 408 transitions, 6801 flow. Second operand 9 states and 159 transitions. [2024-06-28 04:13:21,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 455 transitions, 8295 flow [2024-06-28 04:13:22,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 455 transitions, 8176 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 04:13:22,161 INFO L231 Difference]: Finished difference. Result has 254 places, 425 transitions, 7614 flow [2024-06-28 04:13:22,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6682, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7614, PETRI_PLACES=254, PETRI_TRANSITIONS=425} [2024-06-28 04:13:22,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-28 04:13:22,162 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 425 transitions, 7614 flow [2024-06-28 04:13:22,162 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 04:13:22,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:22,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:13:22,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 04:13:22,162 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 04:13:22,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:22,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1011376234, now seen corresponding path program 4 times [2024-06-28 04:13:22,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:22,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438597240] [2024-06-28 04:13:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:22,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:25,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:25,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438597240] [2024-06-28 04:13:25,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438597240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:25,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:25,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:13:25,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897531496] [2024-06-28 04:13:25,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:25,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:13:25,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:13:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:13:25,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:13:25,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 425 transitions, 7614 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 04:13:25,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:25,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:13:25,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:27,388 INFO L124 PetriNetUnfolderBase]: 2878/4680 cut-off events. [2024-06-28 04:13:27,388 INFO L125 PetriNetUnfolderBase]: For 522339/522339 co-relation queries the response was YES. [2024-06-28 04:13:27,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53097 conditions, 4680 events. 2878/4680 cut-off events. For 522339/522339 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 28390 event pairs, 601 based on Foata normal form. 6/4677 useless extension candidates. Maximal degree in co-relation 52979. Up to 3710 conditions per place. [2024-06-28 04:13:27,444 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 311 selfloop transitions, 157 changer transitions 0/473 dead transitions. [2024-06-28 04:13:27,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 473 transitions, 9544 flow [2024-06-28 04:13:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:13:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:13:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 04:13:27,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-28 04:13:27,445 INFO L175 Difference]: Start difference. First operand has 254 places, 425 transitions, 7614 flow. Second operand 10 states and 174 transitions. [2024-06-28 04:13:27,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 473 transitions, 9544 flow [2024-06-28 04:13:28,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 473 transitions, 9368 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 04:13:28,103 INFO L231 Difference]: Finished difference. Result has 258 places, 439 transitions, 8114 flow [2024-06-28 04:13:28,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7438, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8114, PETRI_PLACES=258, PETRI_TRANSITIONS=439} [2024-06-28 04:13:28,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-28 04:13:28,104 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 439 transitions, 8114 flow [2024-06-28 04:13:28,104 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 04:13:28,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:28,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:13:28,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 04:13:28,105 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 04:13:28,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1019947114, now seen corresponding path program 5 times [2024-06-28 04:13:28,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:28,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903130205] [2024-06-28 04:13:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:28,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:31,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:31,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903130205] [2024-06-28 04:13:31,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903130205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:31,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:31,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:13:31,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064452376] [2024-06-28 04:13:31,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:31,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:13:31,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:31,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:13:31,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:13:31,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:13:31,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 439 transitions, 8114 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 04:13:31,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:31,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:13:31,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:33,176 INFO L124 PetriNetUnfolderBase]: 2983/4834 cut-off events. [2024-06-28 04:13:33,177 INFO L125 PetriNetUnfolderBase]: For 565642/565642 co-relation queries the response was YES. [2024-06-28 04:13:33,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56265 conditions, 4834 events. 2983/4834 cut-off events. For 565642/565642 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 29336 event pairs, 622 based on Foata normal form. 10/4835 useless extension candidates. Maximal degree in co-relation 56146. Up to 4329 conditions per place. [2024-06-28 04:13:33,238 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 384 selfloop transitions, 108 changer transitions 0/497 dead transitions. [2024-06-28 04:13:33,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 497 transitions, 10230 flow [2024-06-28 04:13:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:13:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:13:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-28 04:13:33,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974630021141649 [2024-06-28 04:13:33,240 INFO L175 Difference]: Start difference. First operand has 258 places, 439 transitions, 8114 flow. Second operand 11 states and 188 transitions. [2024-06-28 04:13:33,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 497 transitions, 10230 flow [2024-06-28 04:13:33,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 497 transitions, 9836 flow, removed 103 selfloop flow, removed 6 redundant places. [2024-06-28 04:13:33,929 INFO L231 Difference]: Finished difference. Result has 266 places, 468 transitions, 8747 flow [2024-06-28 04:13:33,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7774, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8747, PETRI_PLACES=266, PETRI_TRANSITIONS=468} [2024-06-28 04:13:33,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-28 04:13:33,930 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 468 transitions, 8747 flow [2024-06-28 04:13:33,930 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 04:13:33,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:33,930 INFO 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 04:13:33,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 04:13:33,931 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 04:13:33,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:33,931 INFO L85 PathProgramCache]: Analyzing trace with hash 181530218, now seen corresponding path program 1 times [2024-06-28 04:13:33,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:33,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988853000] [2024-06-28 04:13:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:33,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:36,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:36,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988853000] [2024-06-28 04:13:36,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988853000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:36,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:36,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:13:36,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585600600] [2024-06-28 04:13:36,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:36,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:13:36,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:36,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:13:36,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:13:36,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:13:36,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 468 transitions, 8747 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 04:13:36,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:36,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:13:36,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:38,264 INFO L124 PetriNetUnfolderBase]: 2977/4827 cut-off events. [2024-06-28 04:13:38,264 INFO L125 PetriNetUnfolderBase]: For 577585/577585 co-relation queries the response was YES. [2024-06-28 04:13:38,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56790 conditions, 4827 events. 2977/4827 cut-off events. For 577585/577585 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 29282 event pairs, 636 based on Foata normal form. 3/4813 useless extension candidates. Maximal degree in co-relation 56666. Up to 4436 conditions per place. [2024-06-28 04:13:38,329 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 431 selfloop transitions, 48 changer transitions 0/484 dead transitions. [2024-06-28 04:13:38,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 484 transitions, 9851 flow [2024-06-28 04:13:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:13:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:13:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:13:38,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:13:38,330 INFO L175 Difference]: Start difference. First operand has 266 places, 468 transitions, 8747 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:13:38,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 484 transitions, 9851 flow [2024-06-28 04:13:39,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 484 transitions, 9543 flow, removed 143 selfloop flow, removed 3 redundant places. [2024-06-28 04:13:39,268 INFO L231 Difference]: Finished difference. Result has 270 places, 468 transitions, 8549 flow [2024-06-28 04:13:39,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8439, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8549, PETRI_PLACES=270, PETRI_TRANSITIONS=468} [2024-06-28 04:13:39,269 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-28 04:13:39,269 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 468 transitions, 8549 flow [2024-06-28 04:13:39,269 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 04:13:39,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:39,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:13:39,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 04:13:39,269 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 04:13:39,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:39,270 INFO L85 PathProgramCache]: Analyzing trace with hash -856397741, now seen corresponding path program 1 times [2024-06-28 04:13:39,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:39,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772004290] [2024-06-28 04:13:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:39,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:42,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:42,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772004290] [2024-06-28 04:13:42,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772004290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:42,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:42,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:13:42,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251782305] [2024-06-28 04:13:42,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:42,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:13:42,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:42,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:13:42,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:13:42,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:13:42,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 468 transitions, 8549 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:42,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:42,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:13:42,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:45,153 INFO L124 PetriNetUnfolderBase]: 3020/4915 cut-off events. [2024-06-28 04:13:45,153 INFO L125 PetriNetUnfolderBase]: For 618859/618859 co-relation queries the response was YES. [2024-06-28 04:13:45,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56594 conditions, 4915 events. 3020/4915 cut-off events. For 618859/618859 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30102 event pairs, 489 based on Foata normal form. 30/4936 useless extension candidates. Maximal degree in co-relation 56468. Up to 3286 conditions per place. [2024-06-28 04:13:45,213 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 275 selfloop transitions, 234 changer transitions 0/514 dead transitions. [2024-06-28 04:13:45,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 514 transitions, 10325 flow [2024-06-28 04:13:45,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:13:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:13:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 04:13:45,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-28 04:13:45,215 INFO L175 Difference]: Start difference. First operand has 270 places, 468 transitions, 8549 flow. Second operand 9 states and 165 transitions. [2024-06-28 04:13:45,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 514 transitions, 10325 flow [2024-06-28 04:13:45,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 514 transitions, 10123 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-28 04:13:45,914 INFO L231 Difference]: Finished difference. Result has 274 places, 482 transitions, 9363 flow [2024-06-28 04:13:45,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8355, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9363, PETRI_PLACES=274, PETRI_TRANSITIONS=482} [2024-06-28 04:13:45,915 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-28 04:13:45,915 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 482 transitions, 9363 flow [2024-06-28 04:13:45,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:45,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:45,915 INFO 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 04:13:45,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 04:13:45,916 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 04:13:45,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:45,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1011217359, now seen corresponding path program 1 times [2024-06-28 04:13:45,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:45,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312556422] [2024-06-28 04:13:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:45,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:49,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:49,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312556422] [2024-06-28 04:13:49,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312556422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:49,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:49,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:13:49,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90676183] [2024-06-28 04:13:49,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:49,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:13:49,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:49,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:13:49,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:13:49,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:13:49,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 482 transitions, 9363 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:49,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:49,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:13:49,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:51,376 INFO L124 PetriNetUnfolderBase]: 3196/5187 cut-off events. [2024-06-28 04:13:51,377 INFO L125 PetriNetUnfolderBase]: For 706536/706536 co-relation queries the response was YES. [2024-06-28 04:13:51,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60980 conditions, 5187 events. 3196/5187 cut-off events. For 706536/706536 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31836 event pairs, 655 based on Foata normal form. 54/5232 useless extension candidates. Maximal degree in co-relation 60852. Up to 4188 conditions per place. [2024-06-28 04:13:51,439 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 365 selfloop transitions, 146 changer transitions 3/519 dead transitions. [2024-06-28 04:13:51,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 519 transitions, 10803 flow [2024-06-28 04:13:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:13:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:13:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 04:13:51,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-28 04:13:51,440 INFO L175 Difference]: Start difference. First operand has 274 places, 482 transitions, 9363 flow. Second operand 10 states and 179 transitions. [2024-06-28 04:13:51,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 519 transitions, 10803 flow [2024-06-28 04:13:52,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 519 transitions, 10697 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-28 04:13:52,572 INFO L231 Difference]: Finished difference. Result has 281 places, 483 transitions, 9628 flow [2024-06-28 04:13:52,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9257, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9628, PETRI_PLACES=281, PETRI_TRANSITIONS=483} [2024-06-28 04:13:52,573 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-28 04:13:52,573 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 483 transitions, 9628 flow [2024-06-28 04:13:52,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:52,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:52,573 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, 1] [2024-06-28 04:13:52,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 04:13:52,574 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 04:13:52,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:52,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1011361509, now seen corresponding path program 2 times [2024-06-28 04:13:52,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:52,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605347567] [2024-06-28 04:13:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:52,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:56,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:56,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605347567] [2024-06-28 04:13:56,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605347567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:56,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:56,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:13:56,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780046199] [2024-06-28 04:13:56,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:56,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:13:56,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:56,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:13:56,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:13:56,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:13:56,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 483 transitions, 9628 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:56,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:56,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:13:56,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:58,756 INFO L124 PetriNetUnfolderBase]: 3372/5473 cut-off events. [2024-06-28 04:13:58,756 INFO L125 PetriNetUnfolderBase]: For 742139/742139 co-relation queries the response was YES. [2024-06-28 04:13:58,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64073 conditions, 5473 events. 3372/5473 cut-off events. For 742139/742139 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 33929 event pairs, 728 based on Foata normal form. 54/5518 useless extension candidates. Maximal degree in co-relation 63943. Up to 4284 conditions per place. [2024-06-28 04:13:58,824 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 377 selfloop transitions, 122 changer transitions 11/515 dead transitions. [2024-06-28 04:13:58,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 515 transitions, 10919 flow [2024-06-28 04:13:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:13:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:13:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-28 04:13:58,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323467230443976 [2024-06-28 04:13:58,825 INFO L175 Difference]: Start difference. First operand has 281 places, 483 transitions, 9628 flow. Second operand 11 states and 186 transitions. [2024-06-28 04:13:58,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 515 transitions, 10919 flow [2024-06-28 04:13:59,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 515 transitions, 10671 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-28 04:13:59,901 INFO L231 Difference]: Finished difference. Result has 285 places, 477 transitions, 9541 flow [2024-06-28 04:13:59,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9380, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9541, PETRI_PLACES=285, PETRI_TRANSITIONS=477} [2024-06-28 04:13:59,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-28 04:13:59,902 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 477 transitions, 9541 flow [2024-06-28 04:13:59,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:59,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:59,902 INFO 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 04:13:59,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 04:13:59,902 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 04:13:59,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:59,903 INFO L85 PathProgramCache]: Analyzing trace with hash -952660731, now seen corresponding path program 2 times [2024-06-28 04:13:59,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:59,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848076279] [2024-06-28 04:13:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:59,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:03,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:03,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848076279] [2024-06-28 04:14:03,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848076279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:03,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:03,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:14:03,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002408909] [2024-06-28 04:14:03,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:03,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:14:03,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:03,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:14:03,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:14:03,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:14:03,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 477 transitions, 9541 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:03,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:03,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:14:03,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:05,638 INFO L124 PetriNetUnfolderBase]: 3417/5552 cut-off events. [2024-06-28 04:14:05,638 INFO L125 PetriNetUnfolderBase]: For 711777/711777 co-relation queries the response was YES. [2024-06-28 04:14:05,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64544 conditions, 5552 events. 3417/5552 cut-off events. For 711777/711777 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 34715 event pairs, 757 based on Foata normal form. 30/5565 useless extension candidates. Maximal degree in co-relation 64413. Up to 4761 conditions per place. [2024-06-28 04:14:05,704 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 427 selfloop transitions, 88 changer transitions 0/520 dead transitions. [2024-06-28 04:14:05,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 520 transitions, 11192 flow [2024-06-28 04:14:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:14:05,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:14:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 04:14:05,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-28 04:14:05,705 INFO L175 Difference]: Start difference. First operand has 285 places, 477 transitions, 9541 flow. Second operand 9 states and 161 transitions. [2024-06-28 04:14:05,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 520 transitions, 11192 flow [2024-06-28 04:14:06,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 520 transitions, 10925 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-28 04:14:06,741 INFO L231 Difference]: Finished difference. Result has 287 places, 484 transitions, 9638 flow [2024-06-28 04:14:06,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9278, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9638, PETRI_PLACES=287, PETRI_TRANSITIONS=484} [2024-06-28 04:14:06,742 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-28 04:14:06,742 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 484 transitions, 9638 flow [2024-06-28 04:14:06,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:06,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:06,743 INFO 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 04:14:06,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 04:14:06,743 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 04:14:06,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:06,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1709661143, now seen corresponding path program 3 times [2024-06-28 04:14:06,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:06,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753369804] [2024-06-28 04:14:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:06,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:10,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:10,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753369804] [2024-06-28 04:14:10,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753369804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:10,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:10,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:14:10,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805012999] [2024-06-28 04:14:10,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:10,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:14:10,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:10,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:14:10,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:14:10,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:14:10,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 484 transitions, 9638 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:10,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:10,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:14:10,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:12,763 INFO L124 PetriNetUnfolderBase]: 4010/6525 cut-off events. [2024-06-28 04:14:12,763 INFO L125 PetriNetUnfolderBase]: For 870838/870838 co-relation queries the response was YES. [2024-06-28 04:14:12,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75199 conditions, 6525 events. 4010/6525 cut-off events. For 870838/870838 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 41608 event pairs, 754 based on Foata normal form. 48/6564 useless extension candidates. Maximal degree in co-relation 75066. Up to 3587 conditions per place. [2024-06-28 04:14:12,857 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 283 selfloop transitions, 246 changer transitions 0/534 dead transitions. [2024-06-28 04:14:12,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 534 transitions, 11493 flow [2024-06-28 04:14:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:14:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:14:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-28 04:14:12,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-28 04:14:12,859 INFO L175 Difference]: Start difference. First operand has 287 places, 484 transitions, 9638 flow. Second operand 10 states and 185 transitions. [2024-06-28 04:14:12,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 534 transitions, 11493 flow [2024-06-28 04:14:14,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 534 transitions, 11287 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 04:14:14,027 INFO L231 Difference]: Finished difference. Result has 292 places, 489 transitions, 10138 flow [2024-06-28 04:14:14,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9432, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10138, PETRI_PLACES=292, PETRI_TRANSITIONS=489} [2024-06-28 04:14:14,027 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-28 04:14:14,027 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 489 transitions, 10138 flow [2024-06-28 04:14:14,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:14,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:14,027 INFO 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 04:14:14,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 04:14:14,028 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 04:14:14,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -952668171, now seen corresponding path program 3 times [2024-06-28 04:14:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:14,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637868740] [2024-06-28 04:14:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:14,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:17,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:17,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637868740] [2024-06-28 04:14:17,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637868740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:17,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:17,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:14:17,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78625435] [2024-06-28 04:14:17,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:17,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:14:17,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:17,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:14:17,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:14:17,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:14:17,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 489 transitions, 10138 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:17,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:17,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:14:17,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:20,638 INFO L124 PetriNetUnfolderBase]: 4126/6723 cut-off events. [2024-06-28 04:14:20,639 INFO L125 PetriNetUnfolderBase]: For 889079/889079 co-relation queries the response was YES. [2024-06-28 04:14:20,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77580 conditions, 6723 events. 4126/6723 cut-off events. For 889079/889079 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 43495 event pairs, 920 based on Foata normal form. 48/6762 useless extension candidates. Maximal degree in co-relation 77445. Up to 5208 conditions per place. [2024-06-28 04:14:20,730 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 312 selfloop transitions, 247 changer transitions 0/564 dead transitions. [2024-06-28 04:14:20,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 564 transitions, 12629 flow [2024-06-28 04:14:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:14:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:14:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 219 transitions. [2024-06-28 04:14:20,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-28 04:14:20,732 INFO L175 Difference]: Start difference. First operand has 292 places, 489 transitions, 10138 flow. Second operand 12 states and 219 transitions. [2024-06-28 04:14:20,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 564 transitions, 12629 flow [2024-06-28 04:14:22,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 564 transitions, 12212 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-28 04:14:22,285 INFO L231 Difference]: Finished difference. Result has 301 places, 518 transitions, 11147 flow [2024-06-28 04:14:22,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9736, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11147, PETRI_PLACES=301, PETRI_TRANSITIONS=518} [2024-06-28 04:14:22,285 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-28 04:14:22,286 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 518 transitions, 11147 flow [2024-06-28 04:14:22,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:22,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:22,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:14:22,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 04:14:22,286 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 04:14:22,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:22,286 INFO L85 PathProgramCache]: Analyzing trace with hash -952875933, now seen corresponding path program 4 times [2024-06-28 04:14:22,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:22,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416066622] [2024-06-28 04:14:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:22,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:25,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:25,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416066622] [2024-06-28 04:14:25,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416066622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:25,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:25,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:14:25,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771110466] [2024-06-28 04:14:25,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:25,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:14:25,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:25,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:14:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:14:25,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:14:25,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 518 transitions, 11147 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:25,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:25,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:14:25,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:28,793 INFO L124 PetriNetUnfolderBase]: 4196/6860 cut-off events. [2024-06-28 04:14:28,793 INFO L125 PetriNetUnfolderBase]: For 948072/948072 co-relation queries the response was YES. [2024-06-28 04:14:28,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77938 conditions, 6860 events. 4196/6860 cut-off events. For 948072/948072 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 44790 event pairs, 1070 based on Foata normal form. 90/6941 useless extension candidates. Maximal degree in co-relation 77798. Up to 5804 conditions per place. [2024-06-28 04:14:28,878 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 448 selfloop transitions, 102 changer transitions 9/564 dead transitions. [2024-06-28 04:14:28,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 564 transitions, 12908 flow [2024-06-28 04:14:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:14:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:14:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 217 transitions. [2024-06-28 04:14:28,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881932021466905 [2024-06-28 04:14:28,880 INFO L175 Difference]: Start difference. First operand has 301 places, 518 transitions, 11147 flow. Second operand 13 states and 217 transitions. [2024-06-28 04:14:28,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 564 transitions, 12908 flow [2024-06-28 04:14:30,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 564 transitions, 12702 flow, removed 92 selfloop flow, removed 3 redundant places. [2024-06-28 04:14:30,249 INFO L231 Difference]: Finished difference. Result has 313 places, 519 transitions, 11271 flow [2024-06-28 04:14:30,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10949, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11271, PETRI_PLACES=313, PETRI_TRANSITIONS=519} [2024-06-28 04:14:30,250 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-28 04:14:30,250 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 519 transitions, 11271 flow [2024-06-28 04:14:30,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:30,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:30,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:14:30,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 04:14:30,250 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 04:14:30,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:30,251 INFO L85 PathProgramCache]: Analyzing trace with hash -952668388, now seen corresponding path program 1 times [2024-06-28 04:14:30,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:30,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273498692] [2024-06-28 04:14:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:30,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:33,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:33,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273498692] [2024-06-28 04:14:33,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273498692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:33,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:33,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:14:33,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048974094] [2024-06-28 04:14:33,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:33,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:14:33,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:33,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:14:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:14:33,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:14:33,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 519 transitions, 11271 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:33,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:33,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:14:33,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:35,604 INFO L124 PetriNetUnfolderBase]: 4055/6635 cut-off events. [2024-06-28 04:14:35,604 INFO L125 PetriNetUnfolderBase]: For 792914/792914 co-relation queries the response was YES. [2024-06-28 04:14:35,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76987 conditions, 6635 events. 4055/6635 cut-off events. For 792914/792914 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43164 event pairs, 1054 based on Foata normal form. 3/6629 useless extension candidates. Maximal degree in co-relation 76843. Up to 6187 conditions per place. [2024-06-28 04:14:35,689 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 472 selfloop transitions, 65 changer transitions 0/542 dead transitions. [2024-06-28 04:14:35,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 542 transitions, 12526 flow [2024-06-28 04:14:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:14:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:14:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:14:35,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-28 04:14:35,690 INFO L175 Difference]: Start difference. First operand has 313 places, 519 transitions, 11271 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:14:35,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 542 transitions, 12526 flow [2024-06-28 04:14:37,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 542 transitions, 12240 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-28 04:14:37,101 INFO L231 Difference]: Finished difference. Result has 313 places, 523 transitions, 11254 flow [2024-06-28 04:14:37,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10985, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11254, PETRI_PLACES=313, PETRI_TRANSITIONS=523} [2024-06-28 04:14:37,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-28 04:14:37,102 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 523 transitions, 11254 flow [2024-06-28 04:14:37,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:37,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:37,102 INFO 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 04:14:37,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 04:14:37,102 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 04:14:37,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:37,102 INFO L85 PathProgramCache]: Analyzing trace with hash 81124537, now seen corresponding path program 4 times [2024-06-28 04:14:37,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:37,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092776405] [2024-06-28 04:14:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:37,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:37,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:37,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092776405] [2024-06-28 04:14:37,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092776405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:37,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:37,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:14:37,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4784558] [2024-06-28 04:14:37,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:37,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:14:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:14:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:14:37,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-28 04:14:37,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 523 transitions, 11254 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:37,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:37,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-28 04:14:37,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:38,958 INFO L124 PetriNetUnfolderBase]: 3088/5442 cut-off events. [2024-06-28 04:14:38,958 INFO L125 PetriNetUnfolderBase]: For 870539/870746 co-relation queries the response was YES. [2024-06-28 04:14:39,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68014 conditions, 5442 events. 3088/5442 cut-off events. For 870539/870746 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 39647 event pairs, 942 based on Foata normal form. 83/5081 useless extension candidates. Maximal degree in co-relation 67869. Up to 2924 conditions per place. [2024-06-28 04:14:39,034 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 142 selfloop transitions, 138 changer transitions 1/529 dead transitions. [2024-06-28 04:14:39,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 529 transitions, 11894 flow [2024-06-28 04:14:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:14:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:14:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-28 04:14:39,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2024-06-28 04:14:39,036 INFO L175 Difference]: Start difference. First operand has 313 places, 523 transitions, 11254 flow. Second operand 4 states and 90 transitions. [2024-06-28 04:14:39,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 529 transitions, 11894 flow [2024-06-28 04:14:40,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 529 transitions, 11598 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-28 04:14:40,367 INFO L231 Difference]: Finished difference. Result has 310 places, 520 transitions, 11270 flow [2024-06-28 04:14:40,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10815, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=11270, PETRI_PLACES=310, PETRI_TRANSITIONS=520} [2024-06-28 04:14:40,368 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-28 04:14:40,368 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 520 transitions, 11270 flow [2024-06-28 04:14:40,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:40,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:40,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:14:40,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 04:14:40,369 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 04:14:40,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:40,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1567746843, now seen corresponding path program 1 times [2024-06-28 04:14:40,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:40,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602270433] [2024-06-28 04:14:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:40,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:43,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:43,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602270433] [2024-06-28 04:14:43,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602270433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:43,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:43,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:14:43,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986841527] [2024-06-28 04:14:43,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:43,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:14:43,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:14:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:14:43,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:14:43,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 520 transitions, 11270 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:43,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:43,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:14:43,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:46,050 INFO L124 PetriNetUnfolderBase]: 4190/6906 cut-off events. [2024-06-28 04:14:46,050 INFO L125 PetriNetUnfolderBase]: For 856908/856908 co-relation queries the response was YES. [2024-06-28 04:14:46,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80141 conditions, 6906 events. 4190/6906 cut-off events. For 856908/856908 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 45900 event pairs, 1092 based on Foata normal form. 8/6897 useless extension candidates. Maximal degree in co-relation 79995. Up to 6364 conditions per place. [2024-06-28 04:14:46,140 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 497 selfloop transitions, 45 changer transitions 5/552 dead transitions. [2024-06-28 04:14:46,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 552 transitions, 12819 flow [2024-06-28 04:14:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:14:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:14:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:14:46,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-28 04:14:46,142 INFO L175 Difference]: Start difference. First operand has 310 places, 520 transitions, 11270 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:14:46,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 552 transitions, 12819 flow [2024-06-28 04:14:47,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 552 transitions, 12810 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 04:14:47,708 INFO L231 Difference]: Finished difference. Result has 319 places, 524 transitions, 11527 flow [2024-06-28 04:14:47,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11261, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11527, PETRI_PLACES=319, PETRI_TRANSITIONS=524} [2024-06-28 04:14:47,708 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-28 04:14:47,708 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 524 transitions, 11527 flow [2024-06-28 04:14:47,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:47,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:47,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:14:47,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 04:14:47,709 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 04:14:47,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:47,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2123916832, now seen corresponding path program 1 times [2024-06-28 04:14:47,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:47,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682027167] [2024-06-28 04:14:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:47,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:50,421 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 04:14:50,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:50,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682027167] [2024-06-28 04:14:50,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682027167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:50,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:50,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:14:50,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352186851] [2024-06-28 04:14:50,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:50,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:14:50,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:50,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:14:50,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:14:50,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:14:50,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 524 transitions, 11527 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 04:14:50,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:50,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:14:50,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:52,998 INFO L124 PetriNetUnfolderBase]: 4153/6862 cut-off events. [2024-06-28 04:14:52,999 INFO L125 PetriNetUnfolderBase]: For 855831/855831 co-relation queries the response was YES. [2024-06-28 04:14:53,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80163 conditions, 6862 events. 4153/6862 cut-off events. For 855831/855831 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 45589 event pairs, 1077 based on Foata normal form. 1/6859 useless extension candidates. Maximal degree in co-relation 80012. Up to 6426 conditions per place. [2024-06-28 04:14:53,098 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 512 selfloop transitions, 41 changer transitions 0/558 dead transitions. [2024-06-28 04:14:53,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 558 transitions, 12749 flow [2024-06-28 04:14:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:14:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:14:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 04:14:53,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-28 04:14:53,100 INFO L175 Difference]: Start difference. First operand has 319 places, 524 transitions, 11527 flow. Second operand 9 states and 155 transitions. [2024-06-28 04:14:53,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 558 transitions, 12749 flow [2024-06-28 04:14:54,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 558 transitions, 12639 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 04:14:54,709 INFO L231 Difference]: Finished difference. Result has 326 places, 525 transitions, 11537 flow [2024-06-28 04:14:54,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11417, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11537, PETRI_PLACES=326, PETRI_TRANSITIONS=525} [2024-06-28 04:14:54,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-28 04:14:54,710 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 525 transitions, 11537 flow [2024-06-28 04:14:54,710 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 04:14:54,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:54,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:14:54,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 04:14:54,710 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 04:14:54,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash -642488458, now seen corresponding path program 1 times [2024-06-28 04:14:54,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:54,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601229364] [2024-06-28 04:14:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:54,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:57,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:57,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601229364] [2024-06-28 04:14:57,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601229364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:57,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:57,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:14:57,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30825582] [2024-06-28 04:14:57,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:57,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:14:57,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:57,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:14:57,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:14:57,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:14:57,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 525 transitions, 11537 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 04:14:57,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:57,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:14:57,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:00,334 INFO L124 PetriNetUnfolderBase]: 4135/6822 cut-off events. [2024-06-28 04:15:00,334 INFO L125 PetriNetUnfolderBase]: For 875503/875503 co-relation queries the response was YES. [2024-06-28 04:15:00,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79484 conditions, 6822 events. 4135/6822 cut-off events. For 875503/875503 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45096 event pairs, 894 based on Foata normal form. 8/6813 useless extension candidates. Maximal degree in co-relation 79330. Up to 6020 conditions per place. [2024-06-28 04:15:00,431 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 502 selfloop transitions, 45 changer transitions 0/552 dead transitions. [2024-06-28 04:15:00,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 552 transitions, 12995 flow [2024-06-28 04:15:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:15:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:15:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 04:15:00,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:15:00,432 INFO L175 Difference]: Start difference. First operand has 326 places, 525 transitions, 11537 flow. Second operand 7 states and 126 transitions. [2024-06-28 04:15:00,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 552 transitions, 12995 flow [2024-06-28 04:15:02,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 552 transitions, 12894 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 04:15:02,198 INFO L231 Difference]: Finished difference. Result has 328 places, 525 transitions, 11530 flow [2024-06-28 04:15:02,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11436, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11530, PETRI_PLACES=328, PETRI_TRANSITIONS=525} [2024-06-28 04:15:02,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-28 04:15:02,199 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 525 transitions, 11530 flow [2024-06-28 04:15:02,199 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 04:15:02,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:02,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:02,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 04:15:02,200 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 04:15:02,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:02,200 INFO L85 PathProgramCache]: Analyzing trace with hash 464083938, now seen corresponding path program 2 times [2024-06-28 04:15:02,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:02,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303119485] [2024-06-28 04:15:02,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:02,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:05,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:05,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303119485] [2024-06-28 04:15:05,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303119485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:05,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:05,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:15:05,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385787720] [2024-06-28 04:15:05,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:05,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:15:05,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:05,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:15:05,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:15:05,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:15:05,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 525 transitions, 11530 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 04:15:05,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:05,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:15:05,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:07,993 INFO L124 PetriNetUnfolderBase]: 4117/6792 cut-off events. [2024-06-28 04:15:07,994 INFO L125 PetriNetUnfolderBase]: For 876226/876226 co-relation queries the response was YES. [2024-06-28 04:15:08,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79099 conditions, 6792 events. 4117/6792 cut-off events. For 876226/876226 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 44967 event pairs, 991 based on Foata normal form. 8/6783 useless extension candidates. Maximal degree in co-relation 78943. Up to 6106 conditions per place. [2024-06-28 04:15:08,085 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 492 selfloop transitions, 49 changer transitions 0/546 dead transitions. [2024-06-28 04:15:08,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 546 transitions, 12822 flow [2024-06-28 04:15:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:15:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:15:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 04:15:08,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-28 04:15:08,086 INFO L175 Difference]: Start difference. First operand has 328 places, 525 transitions, 11530 flow. Second operand 7 states and 122 transitions. [2024-06-28 04:15:08,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 546 transitions, 12822 flow [2024-06-28 04:15:09,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 546 transitions, 12667 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 04:15:09,806 INFO L231 Difference]: Finished difference. Result has 328 places, 525 transitions, 11480 flow [2024-06-28 04:15:09,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11375, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11480, PETRI_PLACES=328, PETRI_TRANSITIONS=525} [2024-06-28 04:15:09,807 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-28 04:15:09,807 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 525 transitions, 11480 flow [2024-06-28 04:15:09,807 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 04:15:09,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:09,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:09,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 04:15:09,807 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 04:15:09,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:09,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1873535118, now seen corresponding path program 2 times [2024-06-28 04:15:09,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:09,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025424949] [2024-06-28 04:15:09,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:09,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:12,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:12,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025424949] [2024-06-28 04:15:12,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025424949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:12,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:12,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:15:12,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104740142] [2024-06-28 04:15:12,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:12,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:15:12,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:15:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:15:12,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:15:12,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 525 transitions, 11480 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 04:15:12,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:12,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:15:12,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:16,094 INFO L124 PetriNetUnfolderBase]: 4143/6838 cut-off events. [2024-06-28 04:15:16,095 INFO L125 PetriNetUnfolderBase]: For 864543/864543 co-relation queries the response was YES. [2024-06-28 04:15:16,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79378 conditions, 6838 events. 4143/6838 cut-off events. For 864543/864543 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 45379 event pairs, 899 based on Foata normal form. 1/6836 useless extension candidates. Maximal degree in co-relation 79223. Up to 5749 conditions per place. [2024-06-28 04:15:16,203 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 428 selfloop transitions, 155 changer transitions 0/588 dead transitions. [2024-06-28 04:15:16,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 588 transitions, 13505 flow [2024-06-28 04:15:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 04:15:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 04:15:16,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 237 transitions. [2024-06-28 04:15:16,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39368770764119604 [2024-06-28 04:15:16,205 INFO L175 Difference]: Start difference. First operand has 328 places, 525 transitions, 11480 flow. Second operand 14 states and 237 transitions. [2024-06-28 04:15:16,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 588 transitions, 13505 flow [2024-06-28 04:15:18,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 588 transitions, 13377 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 04:15:18,266 INFO L231 Difference]: Finished difference. Result has 338 places, 534 transitions, 11986 flow [2024-06-28 04:15:18,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11358, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11986, PETRI_PLACES=338, PETRI_TRANSITIONS=534} [2024-06-28 04:15:18,267 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-28 04:15:18,267 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 534 transitions, 11986 flow [2024-06-28 04:15:18,267 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 04:15:18,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:18,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:18,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 04:15:18,267 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 04:15:18,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:18,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1578524038, now seen corresponding path program 1 times [2024-06-28 04:15:18,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:18,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433101614] [2024-06-28 04:15:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:18,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:23,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:23,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433101614] [2024-06-28 04:15:23,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433101614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:23,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:23,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:15:23,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737877636] [2024-06-28 04:15:23,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:23,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:15:23,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:23,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:15:23,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:15:23,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:15:23,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 534 transitions, 11986 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 04:15:23,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:23,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:15:23,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:25,869 INFO L124 PetriNetUnfolderBase]: 4153/6855 cut-off events. [2024-06-28 04:15:25,870 INFO L125 PetriNetUnfolderBase]: For 868300/868300 co-relation queries the response was YES. [2024-06-28 04:15:25,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80386 conditions, 6855 events. 4153/6855 cut-off events. For 868300/868300 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 45405 event pairs, 1086 based on Foata normal form. 2/6848 useless extension candidates. Maximal degree in co-relation 80228. Up to 6417 conditions per place. [2024-06-28 04:15:25,985 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 499 selfloop transitions, 53 changer transitions 0/557 dead transitions. [2024-06-28 04:15:25,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 557 transitions, 13412 flow [2024-06-28 04:15:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:15:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:15:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:15:25,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-28 04:15:25,986 INFO L175 Difference]: Start difference. First operand has 338 places, 534 transitions, 11986 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:15:25,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 557 transitions, 13412 flow [2024-06-28 04:15:27,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 557 transitions, 13244 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-28 04:15:27,784 INFO L231 Difference]: Finished difference. Result has 337 places, 537 transitions, 12036 flow [2024-06-28 04:15:27,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11818, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12036, PETRI_PLACES=337, PETRI_TRANSITIONS=537} [2024-06-28 04:15:27,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-28 04:15:27,784 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 537 transitions, 12036 flow [2024-06-28 04:15:27,784 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 04:15:27,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:27,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:27,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 04:15:27,785 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 04:15:27,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:27,785 INFO L85 PathProgramCache]: Analyzing trace with hash 968111990, now seen corresponding path program 2 times [2024-06-28 04:15:27,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:27,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834552640] [2024-06-28 04:15:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:27,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:30,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:30,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834552640] [2024-06-28 04:15:30,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834552640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:30,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:30,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:15:30,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963396951] [2024-06-28 04:15:30,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:30,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:15:30,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:30,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:15:30,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:15:30,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:15:30,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 537 transitions, 12036 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 04:15:30,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:30,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:15:30,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:33,149 INFO L124 PetriNetUnfolderBase]: 4147/6839 cut-off events. [2024-06-28 04:15:33,150 INFO L125 PetriNetUnfolderBase]: For 881166/881166 co-relation queries the response was YES. [2024-06-28 04:15:33,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80348 conditions, 6839 events. 4147/6839 cut-off events. For 881166/881166 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 45185 event pairs, 1067 based on Foata normal form. 2/6832 useless extension candidates. Maximal degree in co-relation 80187. Up to 6412 conditions per place. [2024-06-28 04:15:33,253 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 497 selfloop transitions, 55 changer transitions 0/557 dead transitions. [2024-06-28 04:15:33,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 557 transitions, 13230 flow [2024-06-28 04:15:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:15:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:15:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:15:33,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-28 04:15:33,254 INFO L175 Difference]: Start difference. First operand has 337 places, 537 transitions, 12036 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:15:33,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 557 transitions, 13230 flow [2024-06-28 04:15:35,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 557 transitions, 13025 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-28 04:15:35,179 INFO L231 Difference]: Finished difference. Result has 340 places, 537 transitions, 11948 flow [2024-06-28 04:15:35,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11831, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11948, PETRI_PLACES=340, PETRI_TRANSITIONS=537} [2024-06-28 04:15:35,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-28 04:15:35,180 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 537 transitions, 11948 flow [2024-06-28 04:15:35,180 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 04:15:35,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:35,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:35,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 04:15:35,180 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 04:15:35,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:35,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1873319792, now seen corresponding path program 1 times [2024-06-28 04:15:35,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:35,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146932136] [2024-06-28 04:15:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:35,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:38,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:38,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146932136] [2024-06-28 04:15:38,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146932136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:38,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:38,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:15:38,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731247948] [2024-06-28 04:15:38,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:38,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:15:38,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:38,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:15:38,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:15:38,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:15:38,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 537 transitions, 11948 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:38,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:38,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:15:38,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:40,935 INFO L124 PetriNetUnfolderBase]: 4216/6954 cut-off events. [2024-06-28 04:15:40,936 INFO L125 PetriNetUnfolderBase]: For 950830/950830 co-relation queries the response was YES. [2024-06-28 04:15:41,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81717 conditions, 6954 events. 4216/6954 cut-off events. For 950830/950830 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46083 event pairs, 1085 based on Foata normal form. 19/6970 useless extension candidates. Maximal degree in co-relation 81555. Up to 6381 conditions per place. [2024-06-28 04:15:41,032 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 501 selfloop transitions, 70 changer transitions 2/578 dead transitions. [2024-06-28 04:15:41,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 578 transitions, 13566 flow [2024-06-28 04:15:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:15:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:15:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-28 04:15:41,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-28 04:15:41,033 INFO L175 Difference]: Start difference. First operand has 340 places, 537 transitions, 11948 flow. Second operand 10 states and 173 transitions. [2024-06-28 04:15:41,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 578 transitions, 13566 flow [2024-06-28 04:15:42,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 578 transitions, 13395 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 04:15:42,554 INFO L231 Difference]: Finished difference. Result has 343 places, 542 transitions, 12148 flow [2024-06-28 04:15:42,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11777, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12148, PETRI_PLACES=343, PETRI_TRANSITIONS=542} [2024-06-28 04:15:42,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-28 04:15:42,554 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 542 transitions, 12148 flow [2024-06-28 04:15:42,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:42,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:42,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:42,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 04:15:42,555 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 04:15:42,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:42,555 INFO L85 PathProgramCache]: Analyzing trace with hash 638388526, now seen corresponding path program 3 times [2024-06-28 04:15:42,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:42,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012661997] [2024-06-28 04:15:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:42,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:45,590 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 04:15:45,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:45,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012661997] [2024-06-28 04:15:45,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012661997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:45,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:45,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:15:45,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597992521] [2024-06-28 04:15:45,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:45,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:15:45,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:45,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:15:45,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:15:45,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:15:45,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 542 transitions, 12148 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 04:15:45,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:45,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:15:45,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:48,655 INFO L124 PetriNetUnfolderBase]: 4232/6968 cut-off events. [2024-06-28 04:15:48,655 INFO L125 PetriNetUnfolderBase]: For 959087/959087 co-relation queries the response was YES. [2024-06-28 04:15:48,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83571 conditions, 6968 events. 4232/6968 cut-off events. For 959087/959087 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 46276 event pairs, 908 based on Foata normal form. 1/6960 useless extension candidates. Maximal degree in co-relation 83407. Up to 5904 conditions per place. [2024-06-28 04:15:48,767 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 425 selfloop transitions, 156 changer transitions 0/586 dead transitions. [2024-06-28 04:15:48,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 586 transitions, 14130 flow [2024-06-28 04:15:48,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:15:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:15:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-28 04:15:48,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-28 04:15:48,768 INFO L175 Difference]: Start difference. First operand has 343 places, 542 transitions, 12148 flow. Second operand 11 states and 189 transitions. [2024-06-28 04:15:48,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 586 transitions, 14130 flow [2024-06-28 04:15:50,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 586 transitions, 13890 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-28 04:15:50,888 INFO L231 Difference]: Finished difference. Result has 350 places, 550 transitions, 12523 flow [2024-06-28 04:15:50,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11908, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12523, PETRI_PLACES=350, PETRI_TRANSITIONS=550} [2024-06-28 04:15:50,889 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-28 04:15:50,889 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 550 transitions, 12523 flow [2024-06-28 04:15:50,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:50,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:50,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:50,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 04:15:50,889 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 04:15:50,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:50,890 INFO L85 PathProgramCache]: Analyzing trace with hash 88547630, now seen corresponding path program 4 times [2024-06-28 04:15:50,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:50,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957514615] [2024-06-28 04:15:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:50,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:53,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:53,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957514615] [2024-06-28 04:15:53,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957514615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:53,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:53,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:15:53,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412041325] [2024-06-28 04:15:53,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:53,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:15:53,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:15:53,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:15:53,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:15:53,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 550 transitions, 12523 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 04:15:53,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:53,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:15:53,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:56,773 INFO L124 PetriNetUnfolderBase]: 4239/6975 cut-off events. [2024-06-28 04:15:56,773 INFO L125 PetriNetUnfolderBase]: For 985600/985600 co-relation queries the response was YES. [2024-06-28 04:15:56,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84507 conditions, 6975 events. 4239/6975 cut-off events. For 985600/985600 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 46227 event pairs, 1092 based on Foata normal form. 3/6969 useless extension candidates. Maximal degree in co-relation 84339. Up to 6486 conditions per place. [2024-06-28 04:15:56,883 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 487 selfloop transitions, 109 changer transitions 0/601 dead transitions. [2024-06-28 04:15:56,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 601 transitions, 14509 flow [2024-06-28 04:15:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:15:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:15:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 04:15:56,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3890063424947146 [2024-06-28 04:15:56,885 INFO L175 Difference]: Start difference. First operand has 350 places, 550 transitions, 12523 flow. Second operand 11 states and 184 transitions. [2024-06-28 04:15:56,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 601 transitions, 14509 flow [2024-06-28 04:15:59,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 601 transitions, 14381 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-28 04:15:59,329 INFO L231 Difference]: Finished difference. Result has 360 places, 569 transitions, 13269 flow [2024-06-28 04:15:59,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12395, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13269, PETRI_PLACES=360, PETRI_TRANSITIONS=569} [2024-06-28 04:15:59,330 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-28 04:15:59,330 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 569 transitions, 13269 flow [2024-06-28 04:15:59,330 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 04:15:59,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:59,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:59,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 04:15:59,330 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 04:15:59,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:59,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1003746574, now seen corresponding path program 2 times [2024-06-28 04:15:59,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:59,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025931851] [2024-06-28 04:15:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:59,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:02,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:02,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025931851] [2024-06-28 04:16:02,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025931851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:02,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:02,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:16:02,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868722165] [2024-06-28 04:16:02,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:02,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:16:02,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:16:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:16:02,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:16:02,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 569 transitions, 13269 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:02,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:02,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:16:02,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:05,121 INFO L124 PetriNetUnfolderBase]: 4197/6915 cut-off events. [2024-06-28 04:16:05,121 INFO L125 PetriNetUnfolderBase]: For 1008359/1008359 co-relation queries the response was YES. [2024-06-28 04:16:05,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84739 conditions, 6915 events. 4197/6915 cut-off events. For 1008359/1008359 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 45895 event pairs, 1031 based on Foata normal form. 10/6916 useless extension candidates. Maximal degree in co-relation 84564. Up to 6503 conditions per place. [2024-06-28 04:16:05,224 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 557 selfloop transitions, 32 changer transitions 4/598 dead transitions. [2024-06-28 04:16:05,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 598 transitions, 14656 flow [2024-06-28 04:16:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:16:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:16:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-28 04:16:05,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-28 04:16:05,225 INFO L175 Difference]: Start difference. First operand has 360 places, 569 transitions, 13269 flow. Second operand 10 states and 160 transitions. [2024-06-28 04:16:05,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 598 transitions, 14656 flow [2024-06-28 04:16:07,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 598 transitions, 14458 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:07,487 INFO L231 Difference]: Finished difference. Result has 366 places, 570 transitions, 13201 flow [2024-06-28 04:16:07,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13071, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13201, PETRI_PLACES=366, PETRI_TRANSITIONS=570} [2024-06-28 04:16:07,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-28 04:16:07,487 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 570 transitions, 13201 flow [2024-06-28 04:16:07,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:07,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:07,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:07,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 04:16:07,488 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 04:16:07,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash 532281444, now seen corresponding path program 1 times [2024-06-28 04:16:07,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:07,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166266858] [2024-06-28 04:16:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:07,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:11,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:11,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166266858] [2024-06-28 04:16:11,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166266858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:11,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:11,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:16:11,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879222543] [2024-06-28 04:16:11,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:11,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:16:11,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:11,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:16:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:16:11,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:16:11,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 570 transitions, 13201 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:11,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:11,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:16:11,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:13,649 INFO L124 PetriNetUnfolderBase]: 4282/7044 cut-off events. [2024-06-28 04:16:13,650 INFO L125 PetriNetUnfolderBase]: For 1043973/1043973 co-relation queries the response was YES. [2024-06-28 04:16:13,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87219 conditions, 7044 events. 4282/7044 cut-off events. For 1043973/1043973 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 46816 event pairs, 1044 based on Foata normal form. 2/7037 useless extension candidates. Maximal degree in co-relation 87042. Up to 6486 conditions per place. [2024-06-28 04:16:13,757 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 552 selfloop transitions, 45 changer transitions 0/602 dead transitions. [2024-06-28 04:16:13,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 602 transitions, 15023 flow [2024-06-28 04:16:13,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:16:13,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-28 04:16:13,759 INFO L175 Difference]: Start difference. First operand has 366 places, 570 transitions, 13201 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:16:13,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 602 transitions, 15023 flow [2024-06-28 04:16:16,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 602 transitions, 14924 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-28 04:16:16,031 INFO L231 Difference]: Finished difference. Result has 368 places, 576 transitions, 13483 flow [2024-06-28 04:16:16,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13102, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13483, PETRI_PLACES=368, PETRI_TRANSITIONS=576} [2024-06-28 04:16:16,032 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-28 04:16:16,032 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 576 transitions, 13483 flow [2024-06-28 04:16:16,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:16,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:16,033 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, 1, 1] [2024-06-28 04:16:16,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 04:16:16,033 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 04:16:16,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:16,033 INFO L85 PathProgramCache]: Analyzing trace with hash 531776454, now seen corresponding path program 2 times [2024-06-28 04:16:16,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:16,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046686956] [2024-06-28 04:16:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:16,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:21,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:21,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046686956] [2024-06-28 04:16:21,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046686956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:21,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:21,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:16:21,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516648267] [2024-06-28 04:16:21,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:21,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:16:21,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:21,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:16:21,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:16:21,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:16:21,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 576 transitions, 13483 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:21,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:21,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:16:21,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:24,106 INFO L124 PetriNetUnfolderBase]: 4277/7031 cut-off events. [2024-06-28 04:16:24,106 INFO L125 PetriNetUnfolderBase]: For 1058653/1058653 co-relation queries the response was YES. [2024-06-28 04:16:24,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87313 conditions, 7031 events. 4277/7031 cut-off events. For 1058653/1058653 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 46726 event pairs, 1103 based on Foata normal form. 2/7016 useless extension candidates. Maximal degree in co-relation 87134. Up to 6369 conditions per place. [2024-06-28 04:16:24,208 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 516 selfloop transitions, 78 changer transitions 1/600 dead transitions. [2024-06-28 04:16:24,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 600 transitions, 14913 flow [2024-06-28 04:16:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:16:24,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-28 04:16:24,210 INFO L175 Difference]: Start difference. First operand has 368 places, 576 transitions, 13483 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:16:24,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 600 transitions, 14913 flow [2024-06-28 04:16:26,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 600 transitions, 14797 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:26,455 INFO L231 Difference]: Finished difference. Result has 372 places, 577 transitions, 13587 flow [2024-06-28 04:16:26,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13367, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13587, PETRI_PLACES=372, PETRI_TRANSITIONS=577} [2024-06-28 04:16:26,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-28 04:16:26,456 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 577 transitions, 13587 flow [2024-06-28 04:16:26,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:26,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:26,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:26,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 04:16:26,456 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 04:16:26,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:26,457 INFO L85 PathProgramCache]: Analyzing trace with hash 531776206, now seen corresponding path program 1 times [2024-06-28 04:16:26,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:26,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055190079] [2024-06-28 04:16:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:26,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:29,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:29,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055190079] [2024-06-28 04:16:29,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055190079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:29,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:29,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:16:29,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513829287] [2024-06-28 04:16:29,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:29,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:16:29,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:29,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:16:29,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:16:29,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:16:29,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 577 transitions, 13587 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:29,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:29,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:16:29,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:32,426 INFO L124 PetriNetUnfolderBase]: 4375/7174 cut-off events. [2024-06-28 04:16:32,426 INFO L125 PetriNetUnfolderBase]: For 1127538/1127538 co-relation queries the response was YES. [2024-06-28 04:16:32,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90388 conditions, 7174 events. 4375/7174 cut-off events. For 1127538/1127538 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 47671 event pairs, 1116 based on Foata normal form. 2/7159 useless extension candidates. Maximal degree in co-relation 90207. Up to 6056 conditions per place. [2024-06-28 04:16:32,541 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 440 selfloop transitions, 195 changer transitions 4/644 dead transitions. [2024-06-28 04:16:32,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 644 transitions, 16225 flow [2024-06-28 04:16:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:16:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:16:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 04:16:32,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 04:16:32,543 INFO L175 Difference]: Start difference. First operand has 372 places, 577 transitions, 13587 flow. Second operand 9 states and 172 transitions. [2024-06-28 04:16:32,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 644 transitions, 16225 flow [2024-06-28 04:16:35,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 644 transitions, 16010 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 04:16:35,014 INFO L231 Difference]: Finished difference. Result has 378 places, 601 transitions, 14626 flow [2024-06-28 04:16:35,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13384, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14626, PETRI_PLACES=378, PETRI_TRANSITIONS=601} [2024-06-28 04:16:35,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-28 04:16:35,015 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 601 transitions, 14626 flow [2024-06-28 04:16:35,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:35,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:35,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:35,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 04:16:35,015 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 04:16:35,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:35,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1448570440, now seen corresponding path program 3 times [2024-06-28 04:16:35,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:35,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808977435] [2024-06-28 04:16:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:35,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:38,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:38,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808977435] [2024-06-28 04:16:38,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808977435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:38,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:38,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:16:38,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729279399] [2024-06-28 04:16:38,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:38,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:16:38,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:38,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:16:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:16:38,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:16:38,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 601 transitions, 14626 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:38,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:38,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:16:38,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:41,093 INFO L124 PetriNetUnfolderBase]: 4403/7236 cut-off events. [2024-06-28 04:16:41,093 INFO L125 PetriNetUnfolderBase]: For 1195308/1195308 co-relation queries the response was YES. [2024-06-28 04:16:41,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93060 conditions, 7236 events. 4403/7236 cut-off events. For 1195308/1195308 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 47811 event pairs, 1009 based on Foata normal form. 12/7239 useless extension candidates. Maximal degree in co-relation 92875. Up to 5139 conditions per place. [2024-06-28 04:16:41,216 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 466 selfloop transitions, 171 changer transitions 2/644 dead transitions. [2024-06-28 04:16:41,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 644 transitions, 16587 flow [2024-06-28 04:16:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:16:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:16:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 04:16:41,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-28 04:16:41,218 INFO L175 Difference]: Start difference. First operand has 378 places, 601 transitions, 14626 flow. Second operand 10 states and 182 transitions. [2024-06-28 04:16:41,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 644 transitions, 16587 flow [2024-06-28 04:16:44,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 644 transitions, 16405 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:44,166 INFO L231 Difference]: Finished difference. Result has 385 places, 604 transitions, 14920 flow [2024-06-28 04:16:44,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14448, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14920, PETRI_PLACES=385, PETRI_TRANSITIONS=604} [2024-06-28 04:16:44,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-28 04:16:44,167 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 604 transitions, 14920 flow [2024-06-28 04:16:44,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:44,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:44,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:44,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 04:16:44,168 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 04:16:44,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1110307310, now seen corresponding path program 2 times [2024-06-28 04:16:44,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:44,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678154163] [2024-06-28 04:16:44,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:44,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:47,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:47,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678154163] [2024-06-28 04:16:47,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678154163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:47,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:47,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:16:47,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096063329] [2024-06-28 04:16:47,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:47,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:16:47,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:47,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:16:47,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:16:47,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:16:47,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 604 transitions, 14920 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:47,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:47,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:16:47,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:49,984 INFO L124 PetriNetUnfolderBase]: 4397/7218 cut-off events. [2024-06-28 04:16:49,984 INFO L125 PetriNetUnfolderBase]: For 1165459/1165459 co-relation queries the response was YES. [2024-06-28 04:16:50,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93477 conditions, 7218 events. 4397/7218 cut-off events. For 1165459/1165459 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 48036 event pairs, 1137 based on Foata normal form. 2/7203 useless extension candidates. Maximal degree in co-relation 93290. Up to 6321 conditions per place. [2024-06-28 04:16:50,111 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 429 selfloop transitions, 191 changer transitions 1/626 dead transitions. [2024-06-28 04:16:50,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 626 transitions, 16333 flow [2024-06-28 04:16:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:16:50,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-28 04:16:50,112 INFO L175 Difference]: Start difference. First operand has 385 places, 604 transitions, 14920 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:16:50,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 626 transitions, 16333 flow [2024-06-28 04:16:53,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 626 transitions, 16075 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 04:16:53,480 INFO L231 Difference]: Finished difference. Result has 387 places, 604 transitions, 15083 flow [2024-06-28 04:16:53,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14663, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15083, PETRI_PLACES=387, PETRI_TRANSITIONS=604} [2024-06-28 04:16:53,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-28 04:16:53,481 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 604 transitions, 15083 flow [2024-06-28 04:16:53,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:53,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:53,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:53,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 04:16:53,481 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 04:16:53,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:53,481 INFO L85 PathProgramCache]: Analyzing trace with hash 345263466, now seen corresponding path program 4 times [2024-06-28 04:16:53,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:53,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089377280] [2024-06-28 04:16:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:53,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:56,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:56,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089377280] [2024-06-28 04:16:56,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089377280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:56,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:56,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:16:56,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295020897] [2024-06-28 04:16:56,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:56,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:16:56,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:56,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:16:56,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:16:56,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:16:56,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 604 transitions, 15083 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:56,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:56,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:16:56,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:59,663 INFO L124 PetriNetUnfolderBase]: 4474/7345 cut-off events. [2024-06-28 04:16:59,663 INFO L125 PetriNetUnfolderBase]: For 1249775/1249775 co-relation queries the response was YES. [2024-06-28 04:16:59,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94863 conditions, 7345 events. 4474/7345 cut-off events. For 1249775/1249775 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 49007 event pairs, 1089 based on Foata normal form. 21/7357 useless extension candidates. Maximal degree in co-relation 94675. Up to 6708 conditions per place. [2024-06-28 04:16:59,782 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 521 selfloop transitions, 109 changer transitions 0/635 dead transitions. [2024-06-28 04:16:59,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 635 transitions, 16651 flow [2024-06-28 04:16:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:16:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:16:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 04:16:59,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-28 04:16:59,784 INFO L175 Difference]: Start difference. First operand has 387 places, 604 transitions, 15083 flow. Second operand 10 states and 167 transitions. [2024-06-28 04:16:59,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 635 transitions, 16651 flow [2024-06-28 04:17:02,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 635 transitions, 16263 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 04:17:02,811 INFO L231 Difference]: Finished difference. Result has 392 places, 610 transitions, 15124 flow [2024-06-28 04:17:02,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14695, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15124, PETRI_PLACES=392, PETRI_TRANSITIONS=610} [2024-06-28 04:17:02,812 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-28 04:17:02,812 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 610 transitions, 15124 flow [2024-06-28 04:17:02,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:02,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:02,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:02,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 04:17:02,812 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 04:17:02,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:02,813 INFO L85 PathProgramCache]: Analyzing trace with hash 354460236, now seen corresponding path program 5 times [2024-06-28 04:17:02,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:02,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809246604] [2024-06-28 04:17:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:02,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:05,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:05,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809246604] [2024-06-28 04:17:05,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809246604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:05,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:05,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:17:05,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097646790] [2024-06-28 04:17:05,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:05,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:17:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:05,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:17:05,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:17:05,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:17:05,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 610 transitions, 15124 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:05,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:05,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:17:05,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:09,065 INFO L124 PetriNetUnfolderBase]: 4518/7407 cut-off events. [2024-06-28 04:17:09,065 INFO L125 PetriNetUnfolderBase]: For 1272856/1272856 co-relation queries the response was YES. [2024-06-28 04:17:09,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96108 conditions, 7407 events. 4518/7407 cut-off events. For 1272856/1272856 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 49458 event pairs, 899 based on Foata normal form. 12/7410 useless extension candidates. Maximal degree in co-relation 95918. Up to 5737 conditions per place. [2024-06-28 04:17:09,186 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 360 selfloop transitions, 280 changer transitions 0/645 dead transitions. [2024-06-28 04:17:09,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 645 transitions, 16817 flow [2024-06-28 04:17:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:17:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:17:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-28 04:17:09,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-28 04:17:09,187 INFO L175 Difference]: Start difference. First operand has 392 places, 610 transitions, 15124 flow. Second operand 10 states and 176 transitions. [2024-06-28 04:17:09,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 645 transitions, 16817 flow [2024-06-28 04:17:12,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 645 transitions, 16593 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-28 04:17:12,058 INFO L231 Difference]: Finished difference. Result has 397 places, 612 transitions, 15551 flow [2024-06-28 04:17:12,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14900, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15551, PETRI_PLACES=397, PETRI_TRANSITIONS=612} [2024-06-28 04:17:12,059 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-28 04:17:12,059 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 612 transitions, 15551 flow [2024-06-28 04:17:12,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:12,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:12,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:12,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 04:17:12,059 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 04:17:12,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash 88762956, now seen corresponding path program 6 times [2024-06-28 04:17:12,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:12,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108619408] [2024-06-28 04:17:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:12,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:15,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:15,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108619408] [2024-06-28 04:17:15,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108619408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:15,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:15,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:17:15,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641661742] [2024-06-28 04:17:15,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:15,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:17:15,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:17:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:17:15,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:17:15,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 612 transitions, 15551 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:15,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:15,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:17:15,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:18,433 INFO L124 PetriNetUnfolderBase]: 4480/7349 cut-off events. [2024-06-28 04:17:18,433 INFO L125 PetriNetUnfolderBase]: For 1263659/1263659 co-relation queries the response was YES. [2024-06-28 04:17:18,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95601 conditions, 7349 events. 4480/7349 cut-off events. For 1263659/1263659 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 48925 event pairs, 1083 based on Foata normal form. 12/7352 useless extension candidates. Maximal degree in co-relation 95410. Up to 6772 conditions per place. [2024-06-28 04:17:18,551 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 551 selfloop transitions, 89 changer transitions 0/645 dead transitions. [2024-06-28 04:17:18,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 645 transitions, 17174 flow [2024-06-28 04:17:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:17:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:17:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 04:17:18,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-28 04:17:18,552 INFO L175 Difference]: Start difference. First operand has 397 places, 612 transitions, 15551 flow. Second operand 10 states and 174 transitions. [2024-06-28 04:17:18,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 645 transitions, 17174 flow [2024-06-28 04:17:21,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 645 transitions, 16584 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-28 04:17:21,376 INFO L231 Difference]: Finished difference. Result has 401 places, 612 transitions, 15145 flow [2024-06-28 04:17:21,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14961, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15145, PETRI_PLACES=401, PETRI_TRANSITIONS=612} [2024-06-28 04:17:21,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-28 04:17:21,377 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 612 transitions, 15145 flow [2024-06-28 04:17:21,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:21,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:21,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:21,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 04:17:21,378 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 04:17:21,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash 797699266, now seen corresponding path program 3 times [2024-06-28 04:17:21,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:21,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947488059] [2024-06-28 04:17:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:21,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:24,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:24,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947488059] [2024-06-28 04:17:24,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947488059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:24,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:24,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:17:24,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324290853] [2024-06-28 04:17:24,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:24,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:17:24,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:17:24,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:17:24,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:17:24,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 612 transitions, 15145 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:24,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:24,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:17:24,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:27,544 INFO L124 PetriNetUnfolderBase]: 4552/7475 cut-off events. [2024-06-28 04:17:27,544 INFO L125 PetriNetUnfolderBase]: For 1314574/1314574 co-relation queries the response was YES. [2024-06-28 04:17:27,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96724 conditions, 7475 events. 4552/7475 cut-off events. For 1314574/1314574 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 50007 event pairs, 1179 based on Foata normal form. 8/7466 useless extension candidates. Maximal degree in co-relation 96532. Up to 6551 conditions per place. [2024-06-28 04:17:27,657 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 587 selfloop transitions, 50 changer transitions 1/643 dead transitions. [2024-06-28 04:17:27,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 643 transitions, 17113 flow [2024-06-28 04:17:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:17:27,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-28 04:17:27,658 INFO L175 Difference]: Start difference. First operand has 401 places, 612 transitions, 15145 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:17:27,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 643 transitions, 17113 flow [2024-06-28 04:17:30,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 643 transitions, 16866 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-28 04:17:30,582 INFO L231 Difference]: Finished difference. Result has 401 places, 614 transitions, 15119 flow [2024-06-28 04:17:30,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14900, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15119, PETRI_PLACES=401, PETRI_TRANSITIONS=614} [2024-06-28 04:17:30,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-28 04:17:30,583 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 614 transitions, 15119 flow [2024-06-28 04:17:30,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:30,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:30,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:30,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:17:30,584 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 04:17:30,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:30,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1410538234, now seen corresponding path program 4 times [2024-06-28 04:17:30,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:30,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146721563] [2024-06-28 04:17:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:30,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:33,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:33,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146721563] [2024-06-28 04:17:33,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146721563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:33,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:33,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:17:33,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556261755] [2024-06-28 04:17:33,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:33,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:17:33,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:33,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:17:33,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:17:33,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:17:33,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 614 transitions, 15119 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:33,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:33,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:17:33,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:36,738 INFO L124 PetriNetUnfolderBase]: 4587/7568 cut-off events. [2024-06-28 04:17:36,738 INFO L125 PetriNetUnfolderBase]: For 1352380/1352380 co-relation queries the response was YES. [2024-06-28 04:17:37,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97790 conditions, 7568 events. 4587/7568 cut-off events. For 1352380/1352380 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 51074 event pairs, 1198 based on Foata normal form. 8/7559 useless extension candidates. Maximal degree in co-relation 97597. Up to 6357 conditions per place. [2024-06-28 04:17:37,193 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 572 selfloop transitions, 62 changer transitions 3/642 dead transitions. [2024-06-28 04:17:37,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 642 transitions, 16990 flow [2024-06-28 04:17:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:17:37,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-28 04:17:37,194 INFO L175 Difference]: Start difference. First operand has 401 places, 614 transitions, 15119 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:17:37,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 642 transitions, 16990 flow [2024-06-28 04:17:40,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 642 transitions, 16922 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 04:17:40,256 INFO L231 Difference]: Finished difference. Result has 405 places, 612 transitions, 15131 flow [2024-06-28 04:17:40,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15051, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15131, PETRI_PLACES=405, PETRI_TRANSITIONS=612} [2024-06-28 04:17:40,257 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-28 04:17:40,257 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 612 transitions, 15131 flow [2024-06-28 04:17:40,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:40,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:40,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:40,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:17:40,257 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 04:17:40,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:40,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1780618606, now seen corresponding path program 5 times [2024-06-28 04:17:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:40,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340076381] [2024-06-28 04:17:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:43,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:43,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340076381] [2024-06-28 04:17:43,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340076381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:43,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:43,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:17:43,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138844850] [2024-06-28 04:17:43,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:43,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:17:43,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:43,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:17:43,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:17:43,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:17:43,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 612 transitions, 15131 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:43,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:43,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:17:43,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:46,748 INFO L124 PetriNetUnfolderBase]: 4609/7582 cut-off events. [2024-06-28 04:17:46,748 INFO L125 PetriNetUnfolderBase]: For 1447924/1447924 co-relation queries the response was YES. [2024-06-28 04:17:46,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98704 conditions, 7582 events. 4609/7582 cut-off events. For 1447924/1447924 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 51149 event pairs, 1212 based on Foata normal form. 26/7591 useless extension candidates. Maximal degree in co-relation 98510. Up to 6905 conditions per place. [2024-06-28 04:17:46,877 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 566 selfloop transitions, 66 changer transitions 5/642 dead transitions. [2024-06-28 04:17:46,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 642 transitions, 16880 flow [2024-06-28 04:17:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:17:46,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:17:46,878 INFO L175 Difference]: Start difference. First operand has 405 places, 612 transitions, 15131 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:17:46,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 642 transitions, 16880 flow [2024-06-28 04:17:50,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 642 transitions, 16735 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-28 04:17:50,153 INFO L231 Difference]: Finished difference. Result has 403 places, 614 transitions, 15262 flow [2024-06-28 04:17:50,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14988, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15262, PETRI_PLACES=403, PETRI_TRANSITIONS=614} [2024-06-28 04:17:50,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-28 04:17:50,154 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 614 transitions, 15262 flow [2024-06-28 04:17:50,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:50,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:50,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:50,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:17:50,154 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 04:17:50,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:50,155 INFO L85 PathProgramCache]: Analyzing trace with hash 273106028, now seen corresponding path program 6 times [2024-06-28 04:17:50,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:50,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164574623] [2024-06-28 04:17:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:50,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:53,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:53,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164574623] [2024-06-28 04:17:53,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164574623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:53,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:53,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:17:53,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640838316] [2024-06-28 04:17:53,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:53,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:17:53,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:17:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:17:53,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:17:53,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 614 transitions, 15262 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:53,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:53,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:17:53,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:56,712 INFO L124 PetriNetUnfolderBase]: 4600/7573 cut-off events. [2024-06-28 04:17:56,712 INFO L125 PetriNetUnfolderBase]: For 1414982/1414982 co-relation queries the response was YES. [2024-06-28 04:17:56,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96304 conditions, 7573 events. 4600/7573 cut-off events. For 1414982/1414982 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 51095 event pairs, 1170 based on Foata normal form. 52/7608 useless extension candidates. Maximal degree in co-relation 96111. Up to 6901 conditions per place. [2024-06-28 04:17:56,843 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 579 selfloop transitions, 46 changer transitions 14/644 dead transitions. [2024-06-28 04:17:56,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 644 transitions, 17063 flow [2024-06-28 04:17:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:17:56,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:17:56,844 INFO L175 Difference]: Start difference. First operand has 403 places, 614 transitions, 15262 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:17:56,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 644 transitions, 17063 flow [2024-06-28 04:18:00,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 644 transitions, 16867 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 04:18:00,012 INFO L231 Difference]: Finished difference. Result has 405 places, 606 transitions, 15034 flow [2024-06-28 04:18:00,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15066, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15034, PETRI_PLACES=405, PETRI_TRANSITIONS=606} [2024-06-28 04:18:00,013 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-28 04:18:00,013 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 606 transitions, 15034 flow [2024-06-28 04:18:00,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:00,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:00,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:00,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:18:00,014 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 04:18:00,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash 273402698, now seen corresponding path program 7 times [2024-06-28 04:18:00,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:00,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229612829] [2024-06-28 04:18:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:00,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:03,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:03,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229612829] [2024-06-28 04:18:03,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229612829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:03,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:03,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:18:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493529952] [2024-06-28 04:18:03,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:03,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:18:03,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:03,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:18:03,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:18:03,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:18:03,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 606 transitions, 15034 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:03,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:03,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:18:03,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:06,505 INFO L124 PetriNetUnfolderBase]: 4601/7586 cut-off events. [2024-06-28 04:18:06,505 INFO L125 PetriNetUnfolderBase]: For 1358360/1358360 co-relation queries the response was YES. [2024-06-28 04:18:06,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96526 conditions, 7586 events. 4601/7586 cut-off events. For 1358360/1358360 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 51328 event pairs, 1160 based on Foata normal form. 30/7599 useless extension candidates. Maximal degree in co-relation 96332. Up to 6988 conditions per place. [2024-06-28 04:18:06,625 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 576 selfloop transitions, 42 changer transitions 12/635 dead transitions. [2024-06-28 04:18:06,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 635 transitions, 16818 flow [2024-06-28 04:18:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:18:06,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-28 04:18:06,627 INFO L175 Difference]: Start difference. First operand has 405 places, 606 transitions, 15034 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:18:06,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 635 transitions, 16818 flow [2024-06-28 04:18:09,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 635 transitions, 16670 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-28 04:18:09,617 INFO L231 Difference]: Finished difference. Result has 406 places, 608 transitions, 15086 flow [2024-06-28 04:18:09,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14886, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15086, PETRI_PLACES=406, PETRI_TRANSITIONS=608} [2024-06-28 04:18:09,618 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-28 04:18:09,618 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 608 transitions, 15086 flow [2024-06-28 04:18:09,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:09,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:09,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:09,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:18:09,618 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 04:18:09,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:09,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1199351236, now seen corresponding path program 8 times [2024-06-28 04:18:09,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:09,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353343941] [2024-06-28 04:18:09,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:09,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:12,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:12,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353343941] [2024-06-28 04:18:12,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353343941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:12,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:12,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:18:12,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264433663] [2024-06-28 04:18:12,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:12,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:18:12,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:12,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:18:12,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:18:12,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:18:12,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 608 transitions, 15086 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:12,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:12,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:18:12,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:15,913 INFO L124 PetriNetUnfolderBase]: 4542/7481 cut-off events. [2024-06-28 04:18:15,914 INFO L125 PetriNetUnfolderBase]: For 1286729/1286729 co-relation queries the response was YES. [2024-06-28 04:18:16,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95585 conditions, 7481 events. 4542/7481 cut-off events. For 1286729/1286729 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 50388 event pairs, 1103 based on Foata normal form. 8/7472 useless extension candidates. Maximal degree in co-relation 95389. Up to 6925 conditions per place. [2024-06-28 04:18:16,054 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 576 selfloop transitions, 45 changer transitions 7/633 dead transitions. [2024-06-28 04:18:16,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 633 transitions, 16699 flow [2024-06-28 04:18:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:18:16,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-28 04:18:16,055 INFO L175 Difference]: Start difference. First operand has 406 places, 608 transitions, 15086 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:18:16,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 633 transitions, 16699 flow [2024-06-28 04:18:19,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 633 transitions, 16543 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-28 04:18:19,537 INFO L231 Difference]: Finished difference. Result has 411 places, 612 transitions, 15187 flow [2024-06-28 04:18:19,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14930, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15187, PETRI_PLACES=411, PETRI_TRANSITIONS=612} [2024-06-28 04:18:19,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-28 04:18:19,538 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 612 transitions, 15187 flow [2024-06-28 04:18:19,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:19,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:19,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:19,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 04:18:19,538 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 04:18:19,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash 78268020, now seen corresponding path program 9 times [2024-06-28 04:18:19,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:19,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750674377] [2024-06-28 04:18:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:19,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:22,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:22,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750674377] [2024-06-28 04:18:22,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750674377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:22,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:22,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:18:22,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340458776] [2024-06-28 04:18:22,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:22,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:18:22,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:22,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:18:22,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:18:22,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:18:22,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 612 transitions, 15187 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:22,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:22,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:18:22,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:26,391 INFO L124 PetriNetUnfolderBase]: 4567/7538 cut-off events. [2024-06-28 04:18:26,391 INFO L125 PetriNetUnfolderBase]: For 1347574/1347574 co-relation queries the response was YES. [2024-06-28 04:18:26,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97221 conditions, 7538 events. 4567/7538 cut-off events. For 1347574/1347574 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 50945 event pairs, 1101 based on Foata normal form. 8/7529 useless extension candidates. Maximal degree in co-relation 97022. Up to 6732 conditions per place. [2024-06-28 04:18:26,511 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 582 selfloop transitions, 43 changer transitions 11/641 dead transitions. [2024-06-28 04:18:26,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 641 transitions, 17072 flow [2024-06-28 04:18:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:26,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:18:26,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-28 04:18:26,512 INFO L175 Difference]: Start difference. First operand has 411 places, 612 transitions, 15187 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:18:26,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 641 transitions, 17072 flow [2024-06-28 04:18:29,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 641 transitions, 16945 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 04:18:29,750 INFO L231 Difference]: Finished difference. Result has 413 places, 610 transitions, 15089 flow [2024-06-28 04:18:29,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15062, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15089, PETRI_PLACES=413, PETRI_TRANSITIONS=610} [2024-06-28 04:18:29,751 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-28 04:18:29,751 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 610 transitions, 15089 flow [2024-06-28 04:18:29,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:29,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:29,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:29,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 04:18:29,751 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 04:18:29,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:29,752 INFO L85 PathProgramCache]: Analyzing trace with hash 532290372, now seen corresponding path program 1 times [2024-06-28 04:18:29,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:29,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882307732] [2024-06-28 04:18:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:29,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:34,288 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 04:18:34,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:34,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882307732] [2024-06-28 04:18:34,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882307732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:34,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:34,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 04:18:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177828174] [2024-06-28 04:18:34,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:34,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 04:18:34,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:34,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 04:18:34,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-28 04:18:34,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:18:34,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 610 transitions, 15089 flow. Second operand has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:34,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:34,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:18:34,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:37,617 INFO L124 PetriNetUnfolderBase]: 4619/7582 cut-off events. [2024-06-28 04:18:37,617 INFO L125 PetriNetUnfolderBase]: For 1478352/1478352 co-relation queries the response was YES. [2024-06-28 04:18:37,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97497 conditions, 7582 events. 4619/7582 cut-off events. For 1478352/1478352 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 50821 event pairs, 1149 based on Foata normal form. 42/7607 useless extension candidates. Maximal degree in co-relation 97298. Up to 6476 conditions per place. [2024-06-28 04:18:37,882 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 540 selfloop transitions, 88 changer transitions 19/652 dead transitions. [2024-06-28 04:18:37,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 652 transitions, 17009 flow [2024-06-28 04:18:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:18:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:18:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 04:18:37,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-28 04:18:37,883 INFO L175 Difference]: Start difference. First operand has 413 places, 610 transitions, 15089 flow. Second operand 10 states and 179 transitions. [2024-06-28 04:18:37,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 652 transitions, 17009 flow [2024-06-28 04:18:40,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 652 transitions, 16918 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 04:18:40,848 INFO L231 Difference]: Finished difference. Result has 415 places, 607 transitions, 15190 flow [2024-06-28 04:18:40,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14998, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15190, PETRI_PLACES=415, PETRI_TRANSITIONS=607} [2024-06-28 04:18:40,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-28 04:18:40,849 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 607 transitions, 15190 flow [2024-06-28 04:18:40,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:40,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:40,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:40,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 04:18:40,849 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 04:18:40,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash 532053036, now seen corresponding path program 1 times [2024-06-28 04:18:40,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:40,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290640222] [2024-06-28 04:18:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:45,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:45,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290640222] [2024-06-28 04:18:45,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290640222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:45,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:45,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 04:18:45,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368756477] [2024-06-28 04:18:45,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:45,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 04:18:45,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:45,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 04:18:45,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-28 04:18:45,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:18:45,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 607 transitions, 15190 flow. Second operand has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:45,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:45,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:18:45,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:49,182 INFO L124 PetriNetUnfolderBase]: 4664/7695 cut-off events. [2024-06-28 04:18:49,182 INFO L125 PetriNetUnfolderBase]: For 1435172/1435172 co-relation queries the response was YES. [2024-06-28 04:18:49,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97944 conditions, 7695 events. 4664/7695 cut-off events. For 1435172/1435172 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 51704 event pairs, 1220 based on Foata normal form. 42/7728 useless extension candidates. Maximal degree in co-relation 97745. Up to 6601 conditions per place. [2024-06-28 04:18:49,304 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 502 selfloop transitions, 140 changer transitions 3/650 dead transitions. [2024-06-28 04:18:49,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 650 transitions, 17128 flow [2024-06-28 04:18:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:18:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:18:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-28 04:18:49,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059196617336152 [2024-06-28 04:18:49,305 INFO L175 Difference]: Start difference. First operand has 415 places, 607 transitions, 15190 flow. Second operand 11 states and 192 transitions. [2024-06-28 04:18:49,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 650 transitions, 17128 flow [2024-06-28 04:18:52,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 650 transitions, 16880 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-28 04:18:52,539 INFO L231 Difference]: Finished difference. Result has 421 places, 613 transitions, 15579 flow [2024-06-28 04:18:52,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14942, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15579, PETRI_PLACES=421, PETRI_TRANSITIONS=613} [2024-06-28 04:18:52,540 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-28 04:18:52,540 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 613 transitions, 15579 flow [2024-06-28 04:18:52,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:52,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:52,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:52,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 04:18:52,540 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 04:18:52,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:52,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1110290694, now seen corresponding path program 2 times [2024-06-28 04:18:52,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:52,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274316904] [2024-06-28 04:18:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:52,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:57,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:57,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274316904] [2024-06-28 04:18:57,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274316904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:57,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:57,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 04:18:57,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312270450] [2024-06-28 04:18:57,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:57,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 04:18:57,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:57,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 04:18:57,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-28 04:18:57,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:18:57,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 613 transitions, 15579 flow. Second operand has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:57,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:57,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:18:57,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:01,541 INFO L124 PetriNetUnfolderBase]: 4813/7934 cut-off events. [2024-06-28 04:19:01,541 INFO L125 PetriNetUnfolderBase]: For 1539527/1539527 co-relation queries the response was YES. [2024-06-28 04:19:01,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99905 conditions, 7934 events. 4813/7934 cut-off events. For 1539527/1539527 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 53748 event pairs, 1160 based on Foata normal form. 66/7983 useless extension candidates. Maximal degree in co-relation 99704. Up to 5475 conditions per place. [2024-06-28 04:19:01,682 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 383 selfloop transitions, 243 changer transitions 50/681 dead transitions. [2024-06-28 04:19:01,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 681 transitions, 18302 flow [2024-06-28 04:19:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:19:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:19:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-28 04:19:01,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-28 04:19:01,683 INFO L175 Difference]: Start difference. First operand has 421 places, 613 transitions, 15579 flow. Second operand 11 states and 217 transitions. [2024-06-28 04:19:01,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 681 transitions, 18302 flow [2024-06-28 04:19:04,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 681 transitions, 18018 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-28 04:19:04,920 INFO L231 Difference]: Finished difference. Result has 429 places, 587 transitions, 15461 flow [2024-06-28 04:19:04,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15299, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15461, PETRI_PLACES=429, PETRI_TRANSITIONS=587} [2024-06-28 04:19:04,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-28 04:19:04,921 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 587 transitions, 15461 flow [2024-06-28 04:19:04,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:04,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:04,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:04,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 04:19:04,922 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 04:19:04,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:04,922 INFO L85 PathProgramCache]: Analyzing trace with hash -45899083, now seen corresponding path program 1 times [2024-06-28 04:19:04,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:04,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079580789] [2024-06-28 04:19:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:04,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:08,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:08,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079580789] [2024-06-28 04:19:08,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079580789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:08,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:08,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:08,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129515846] [2024-06-28 04:19:08,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:08,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:08,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:08,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:08,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:08,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:19:08,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 587 transitions, 15461 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 04:19:08,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:08,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:19:08,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:11,969 INFO L124 PetriNetUnfolderBase]: 4516/7512 cut-off events. [2024-06-28 04:19:11,969 INFO L125 PetriNetUnfolderBase]: For 1354985/1354985 co-relation queries the response was YES. [2024-06-28 04:19:12,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97416 conditions, 7512 events. 4516/7512 cut-off events. For 1354985/1354985 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 50578 event pairs, 1092 based on Foata normal form. 2/7511 useless extension candidates. Maximal degree in co-relation 97210. Up to 6907 conditions per place. [2024-06-28 04:19:12,110 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 570 selfloop transitions, 55 changer transitions 4/634 dead transitions. [2024-06-28 04:19:12,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 634 transitions, 17233 flow [2024-06-28 04:19:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:19:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:19:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 04:19:12,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 04:19:12,113 INFO L175 Difference]: Start difference. First operand has 429 places, 587 transitions, 15461 flow. Second operand 9 states and 172 transitions. [2024-06-28 04:19:12,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 634 transitions, 17233 flow [2024-06-28 04:19:15,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 634 transitions, 16877 flow, removed 103 selfloop flow, removed 8 redundant places. [2024-06-28 04:19:15,725 INFO L231 Difference]: Finished difference. Result has 431 places, 590 transitions, 15375 flow [2024-06-28 04:19:15,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15106, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15375, PETRI_PLACES=431, PETRI_TRANSITIONS=590} [2024-06-28 04:19:15,726 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-28 04:19:15,726 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 590 transitions, 15375 flow [2024-06-28 04:19:15,726 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 04:19:15,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:15,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:15,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 04:19:15,726 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 04:19:15,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:15,727 INFO L85 PathProgramCache]: Analyzing trace with hash -393566205, now seen corresponding path program 2 times [2024-06-28 04:19:15,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:15,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366228637] [2024-06-28 04:19:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:15,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:18,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:18,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366228637] [2024-06-28 04:19:18,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366228637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:18,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:18,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:18,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683850134] [2024-06-28 04:19:18,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:18,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:18,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:18,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:18,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:18,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:19:18,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 590 transitions, 15375 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 04:19:18,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:18,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:19:18,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:22,506 INFO L124 PetriNetUnfolderBase]: 4513/7501 cut-off events. [2024-06-28 04:19:22,506 INFO L125 PetriNetUnfolderBase]: For 1348221/1348221 co-relation queries the response was YES. [2024-06-28 04:19:22,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96062 conditions, 7501 events. 4513/7501 cut-off events. For 1348221/1348221 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 50438 event pairs, 1090 based on Foata normal form. 2/7500 useless extension candidates. Maximal degree in co-relation 95856. Up to 6972 conditions per place. [2024-06-28 04:19:22,630 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 571 selfloop transitions, 52 changer transitions 1/629 dead transitions. [2024-06-28 04:19:22,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 629 transitions, 16802 flow [2024-06-28 04:19:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:19:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:19:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 04:19:22,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-28 04:19:22,631 INFO L175 Difference]: Start difference. First operand has 431 places, 590 transitions, 15375 flow. Second operand 9 states and 165 transitions. [2024-06-28 04:19:22,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 629 transitions, 16802 flow [2024-06-28 04:19:25,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 629 transitions, 16650 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-28 04:19:25,728 INFO L231 Difference]: Finished difference. Result has 436 places, 591 transitions, 15363 flow [2024-06-28 04:19:25,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15226, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15363, PETRI_PLACES=436, PETRI_TRANSITIONS=591} [2024-06-28 04:19:25,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-28 04:19:25,729 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 591 transitions, 15363 flow [2024-06-28 04:19:25,729 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 04:19:25,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:25,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:25,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 04:19:25,730 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 04:19:25,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:25,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1261096631, now seen corresponding path program 3 times [2024-06-28 04:19:25,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:25,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922508390] [2024-06-28 04:19:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:25,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms